CUB-124: scaffold Control Center Go backend

Reviewed-on: #27

.gitea/workflows/dev.yml

@@ -0,0 +1,44 @@
+name: Dev Build
+
+on:
+  pull_request:
+    branches: [dev]
+  push:
+    branches: [dev]
+
+jobs:
+  build-test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: '9.0.x'
+
+      - name: Restore backend
+        run: dotnet restore
+        working-directory: ./backend
+
+      - name: Build backend
+        run: dotnet build --no-restore --configuration Release
+        working-directory: ./backend
+
+      - name: Test backend
+        run: dotnet test --no-build --configuration Release
+        working-directory: ./backend
+
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "24"
+
+      - name: Install frontend deps
+        run: npm ci
+        working-directory: ./frontend
+
+      - name: Build frontend
+        run: npm run build
+        working-directory: ./frontend

README.md

@@ -0,0 +1,223 @@
+# Control Center
+
+> Real-time agent fleet dashboard for the OpenClaw AI development team.
+
+Control Center monitors and controls the full CubeCraft Creations AI agent fleet — Otto, Rex, Dex, Hex, Pip, Nano, Sketch, Bob, Stuart, Norbert, and Flip. It provides live agent status, task progress, session logs, and a command interface, backed by SignalR for push-based updates directly from the OpenClaw gateway.
+
+---
+
+## Tech Stack
+
+| Layer | Technology |
+|---|---|
+| Backend | ASP.NET Core Web API (.NET 8) |
+| Database | PostgreSQL (snake_case via EF Core) |
+| ORM | Entity Framework Core |
+| Real-time | SignalR (`AgentStatusHub`) |
+| Frontend | Angular (latest), Angular Material, Angular Signals |
+| API Client | TypeScript package (`api-client/`) |
+| Deployment | Docker |
+
+---
+
+## Project Structure
+
+```
+Control-Center/
+├── backend/
+│   ├── ControlCenter/
+│   │   ├── Controllers/            # AgentsController, CommandController, LogsController
+│   │   ├── Hubs/                   # AgentStatusHub, IAgentStatusClient, AgentStatusModels
+│   │   ├── Models/                 # AgentMinionMapping
+│   │   ├── Services/               # AgentMinionMapperService, GatewayEventBridgeService
+│   │   ├── Program.cs
+│   │   └── appsettings.json
+│   ├── Configurations/             # AgentConfiguration
+│   ├── Data/                       # AppDbContext, AppDbContextFactory
+│   ├── Dtos/                       # AgentStatusUpdateDto
+│   ├── Entities/                   # Agent, AgentStatus
+│   ├── Migrations/                 # EF migrations
+│   ├── Models/                     # AgentState
+│   └── Repositories/               # AgentStateRepository, IAgentStateRepository
+├── frontend/
+│   └── src/app/
+│       ├── layout/                 # LayoutShell, HeaderBar, NavRail, BottomNav
+│       ├── pages/                  # hub, logs, projects, sessions, settings
+│       ├── components/             # AgentCard, AgentStatusBadge, TaskProgressBar,
+│       │                           #   QuickJumpButton, QuickJumpDrawer,
+│       │                           #   GlobalActionModal, AdaptiveNavigation
+│       ├── command-hub/            # AgentCard command hub view
+│       ├── models/                 # Agent model, AgentStatus, AgentCardData, Nav
+│       └── services/               # AgentStatusService (Angular Signals)
+├── api-client/                     # Shared TS client (models, SignalR WS, HTTP utils)
+├── design/
+│   ├── command-hub-spec.md
+│   └── mockups/                    # Desktop kiosk, mobile, quick-jump drawer
+└── README.md
+```
+
+---
+
+## Domain Model
+
+### Agent
+
+| Field | Type | Description |
+|---|---|---|
+| `Id` | `Guid` | Primary key |
+| `Status` | `AgentStatus` | Current agent state |
+| `Task` | `string?` | Active task description |
+| `Progress` | `int?` | Task completion % (0–100) |
+| `SessionKey` | `string` | OpenClaw session identifier |
+| `Channel` | `string` | Source channel (telegram, slack, etc.) |
+| `LastActivity` | `DateTime` | Last event timestamp |
+| `CreatedAt` / `UpdatedAt` | `DateTime` | Audit fields |
+
+### AgentStatus enum
+
+| Value | Integer | Meaning |
+|---|---|---|
+| `Active` | 0 | Agent is executing a task |
+| `Idle` | 1 | Agent is waiting for work |
+| `Thinking` | 2 | Agent is reasoning/planning |
+| `Error` | 3 | Agent hit an unrecoverable state |
+
+---
+
+## Key Design Decisions
+
+1. **Angular Signals** — Reactive state management. No NgRx — kept intentionally simple.
+2. **Adaptive layout** — Sidebar nav (NavRail) on desktop/kiosk (≥768px); bottom nav on mobile.
+3. **Tactical Dark Mode** — Theme via CSS custom properties in `styles.scss`.
+4. **SignalR fleet group** — Clients call `JoinFleet()` to subscribe to all agent updates broadcast by the hub.
+5. **Backend push model** — Hub uses `IHubContext<AgentStatusHub, IAgentStatusClient>` extension methods to push to clients; no polling.
+6. **Gateway bridge** — `GatewayEventBridgeService` connects the OpenClaw gateway WebSocket to the SignalR hub.
+
+---
+
+## Getting Started
+
+### Prerequisites
+
+- .NET 8 SDK
+- Node.js 20+
+- Docker
+- PostgreSQL
+- Running OpenClaw gateway (for live agent events)
+
+### Backend
+
+```bash
+cd backend
+
+# Restore and build
+dotnet restore
+dotnet build
+
+# Apply migrations
+dotnet ef database update --project ControlCenter
+
+# Run API
+dotnet run --project ControlCenter
+```
+
+API runs at `http://localhost:5000` · Swagger at `http://localhost:5000/swagger`
+
+### Frontend
+
+```bash
+cd frontend
+npm install
+ng serve
+```
+
+Frontend runs at `http://localhost:4200`
+
+---
+
+## Configuration
+
+`backend/ControlCenter/appsettings.json` — override in `appsettings.Development.json` or environment variables:
+
+| Key | Default | Description |
+|---|---|---|
+| `ConnectionStrings:DefaultConnection` | *(set in dev config)* | PostgreSQL connection string |
+| `Gateway:WebSocketUrl` | `ws://localhost:3271/ws` | OpenClaw gateway WebSocket URL |
+| `Gateway:AuthToken` | `""` | Gateway auth token |
+| `Cors:AllowedOrigins` | `localhost:4200`, `localhost:5000` | Frontend origins for CORS |
+
+---
+
+## Real-Time Events
+
+SignalR hub endpoint: `/hubs/agent-status`
+
+### Hub Methods (server → client)
+
+| Method | Payload | Description |
+|---|---|---|
+| `ReceiveStatusUpdate` | `AgentStatusUpdateDto` | Agent status changed |
+| `ReceiveAgentList` | `Agent[]` | Full fleet snapshot on join |
+
+### Client → Server
+
+| Method | Description |
+|---|---|
+| `JoinFleet()` | Subscribe to all agent updates |
+| `LeaveFleet()` | Unsubscribe |
+| `SendStatusUpdate(dto)` | Push a status update (internal use) |
+
+---
+
+## Pages
+
+| Route | Page | Description |
+|---|---|---|
+| `/hub` | Command Hub | Live agent grid — status, task, progress |
+| `/logs` | Logs | Agent session log viewer |
+| `/projects` | Projects | Linear project tracking view |
+| `/sessions` | Sessions | OpenClaw session browser |
+| `/settings` | Settings | App configuration |
+
+---
+
+## Agent Fleet
+
+| Agent | Role |
+|---|---|
+| Otto | Orchestrator — owns the dev lifecycle |
+| Rex | Frontend (Angular) |
+| Dex | Backend (ASP.NET Core) |
+| Hex | Database (schema, migrations) |
+| Pip | Raspberry Pi / Python |
+| Nano | Arduino / ESP32 / ESPHome |
+| Sketch | UX/UI design |
+| Flip | Mobile development |
+| Bob | Content & marketing copy |
+| Stuart | Concept visualization (images) |
+| Norbert | 3D design (OpenSCAD) |
+
+---
+
+## Branch & PR Rules
+
+- All feature branches target `dev` — **never `main`**
+- Branch naming: `agent/<agent>/CUB-N-short-description`
+- PR titles: `CUB-N: short description`
+- PRs require Otto review before Joshua merges
+
+---
+
+## API Overview
+
+| Route prefix | Resource |
+|---|---|
+| `/api/agents` | Agent registry and status |
+| `/api/command` | Issue commands to agents |
+| `/api/logs` | Session log retrieval |
+
+Full schema at `/swagger` when running in dev.
+
+---
+
+*Built by CubeCraft Creations · Orchestrated by Otto*

frontend/.dockerignore

@@ -0,0 +1,33 @@
+# Dependencies
+node_modules/
+npm-debug.log*
+yarn-error.log
+
+# Build output (rebuilt in container)
+dist/
+out-tsc/
+
+# Angular cache
+.angular/cache/
+
+# IDE
+.idea/
+.vscode/
+*.sublime-workspace
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Git
+.git/
+.gitignore
+
+# Docker
+Dockerfile
+.dockerignore
+
+# Misc
+coverage/
+tmp/
+*.log

frontend/Dockerfile

@@ -0,0 +1,38 @@
+# ============================================================
+# Control Center Frontend — Multi-stage Docker Build
+# Angular 21 + nginx for static serving + API proxy
+# ============================================================
+
+# --- Build Stage ---
+FROM node:22-slim AS builder
+
+WORKDIR /app
+
+# Install dependencies first (layer caching)
+COPY package.json package-lock.json ./
+RUN npm ci
+
+# Copy source and build production bundle
+COPY . .
+RUN npm run build
+
+# --- Runtime Stage ---
+FROM nginx:1.27-alpine AS runtime
+
+# Remove default nginx config
+RUN rm /etc/nginx/conf.d/default.conf
+
+# Copy custom nginx config
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Copy built Angular app from builder stage
+COPY --from=builder /app/dist/frontend/browser /usr/share/nginx/html
+
+# Expose HTTP port
+EXPOSE 80
+
+# Health check — confirm nginx is serving
+HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
+  CMD wget -qO- http://localhost/ || exit 1
+
+CMD ["nginx", "-g", "daemon off;"]

frontend/angular.json

@@ -53,7 +53,13 @@
             ],
             "styles": [
               "src/styles.scss"
-            ]
+            ],
+            "stylePreprocessorOptions": {
+              "includePaths": [
+"src",
+                "src/styles"
+              ]
+            }
           },
           "configurations": {
             "production": {

frontend/nginx.conf

@@ -0,0 +1,54 @@
+server {
+    listen 80;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    # Gzip compression
+    gzip on;
+    gzip_vary on;
+    gzip_proxied any;
+    gzip_comp_level 6;
+    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript image/svg+xml;
+
+    # Cache static assets (Angular uses content hashes)
+    location /assets/ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # Cache hashed JS/CSS bundles
+    location ~* \.(js|css)$ {
+        expires 1y;
+        add_header Cache-Control "public, immutable";
+    }
+
+    # Proxy API requests to backend
+    location /api/ {
+        proxy_pass http://backend:8080/api/;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+    }
+
+    # Proxy SignalR WebSocket connections to backend
+    location /hubs/ {
+        proxy_pass http://backend:8080/hubs/;
+        proxy_http_version 1.1;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_read_timeout 86400;
+    }
+
+    # Angular SPA — all other routes fall back to index.html
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+}

frontend/src/app/app.html

@@ -1,344 +1 @@
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-<!-- * * * * * * * * * * * The content below * * * * * * * * * * * -->
-<!-- * * * * * * * * * * is only a placeholder * * * * * * * * * * -->
-<!-- * * * * * * * * * * and can be replaced.  * * * * * * * * * * -->
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-<!-- * * * * * * * * * Delete the template below * * * * * * * * * -->
-<!-- * * * * * * * to get started with your project! * * * * * * * -->
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-
-<style>
-  :host {
-    --bright-blue: oklch(51.01% 0.274 263.83);
-    --electric-violet: oklch(53.18% 0.28 296.97);
-    --french-violet: oklch(47.66% 0.246 305.88);
-    --vivid-pink: oklch(69.02% 0.277 332.77);
-    --hot-red: oklch(61.42% 0.238 15.34);
-    --orange-red: oklch(63.32% 0.24 31.68);
-
-    --gray-900: oklch(19.37% 0.006 300.98);
-    --gray-700: oklch(36.98% 0.014 302.71);
-    --gray-400: oklch(70.9% 0.015 304.04);
-
-    --red-to-pink-to-purple-vertical-gradient: linear-gradient(
-      180deg,
-      var(--orange-red) 0%,
-      var(--vivid-pink) 50%,
-      var(--electric-violet) 100%
-    );
-
-    --red-to-pink-to-purple-horizontal-gradient: linear-gradient(
-      90deg,
-      var(--orange-red) 0%,
-      var(--vivid-pink) 50%,
-      var(--electric-violet) 100%
-    );
-
-    --pill-accent: var(--bright-blue);
-
-    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
-      Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
-      "Segoe UI Symbol";
-    box-sizing: border-box;
-    -webkit-font-smoothing: antialiased;
-    -moz-osx-font-smoothing: grayscale;
-    display: block;
-    height: 100dvh;
-  }
-
-  h1 {
-    font-size: 3.125rem;
-    color: var(--gray-900);
-    font-weight: 500;
-    line-height: 100%;
-    letter-spacing: -0.125rem;
-    margin: 0;
-    font-family: "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
-      Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
-      "Segoe UI Symbol";
-  }
-
-  p {
-    margin: 0;
-    color: var(--gray-700);
-  }
-
-  main {
-    width: 100%;
-    min-height: 100%;
-    display: flex;
-    justify-content: center;
-    align-items: center;
-    padding: 1rem;
-    box-sizing: inherit;
-    position: relative;
-  }
-
-  .angular-logo {
-    max-width: 9.2rem;
-  }
-
-  .content {
-    display: flex;
-    justify-content: space-around;
-    width: 100%;
-    max-width: 700px;
-    margin-bottom: 3rem;
-  }
-
-  .content h1 {
-    margin-top: 1.75rem;
-  }
-
-  .content p {
-    margin-top: 1.5rem;
-  }
-
-  .divider {
-    width: 1px;
-    background: var(--red-to-pink-to-purple-vertical-gradient);
-    margin-inline: 0.5rem;
-  }
-
-  .pill-group {
-    display: flex;
-    flex-direction: column;
-    align-items: start;
-    flex-wrap: wrap;
-    gap: 1.25rem;
-  }
-
-  .pill {
-    display: flex;
-    align-items: center;
-    --pill-accent: var(--bright-blue);
-    background: color-mix(in srgb, var(--pill-accent) 5%, transparent);
-    color: var(--pill-accent);
-    padding-inline: 0.75rem;
-    padding-block: 0.375rem;
-    border-radius: 2.75rem;
-    border: 0;
-    transition: background 0.3s ease;
-    font-family: var(--inter-font);
-    font-size: 0.875rem;
-    font-style: normal;
-    font-weight: 500;
-    line-height: 1.4rem;
-    letter-spacing: -0.00875rem;
-    text-decoration: none;
-    white-space: nowrap;
-  }
-
-  .pill:hover {
-    background: color-mix(in srgb, var(--pill-accent) 15%, transparent);
-  }
-
-  .pill-group .pill:nth-child(6n + 1) {
-    --pill-accent: var(--bright-blue);
-  }
-  .pill-group .pill:nth-child(6n + 2) {
-    --pill-accent: var(--electric-violet);
-  }
-  .pill-group .pill:nth-child(6n + 3) {
-    --pill-accent: var(--french-violet);
-  }
-
-  .pill-group .pill:nth-child(6n + 4),
-  .pill-group .pill:nth-child(6n + 5),
-  .pill-group .pill:nth-child(6n + 6) {
-    --pill-accent: var(--hot-red);
-  }
-
-  .pill-group svg {
-    margin-inline-start: 0.25rem;
-  }
-
-  .social-links {
-    display: flex;
-    align-items: center;
-    gap: 0.73rem;
-    margin-top: 1.5rem;
-  }
-
-  .social-links path {
-    transition: fill 0.3s ease;
-    fill: var(--gray-400);
-  }
-
-  .social-links a:hover svg path {
-    fill: var(--gray-900);
-  }
-
-  @media screen and (max-width: 650px) {
-    .content {
-      flex-direction: column;
-      width: max-content;
-    }
-
-    .divider {
-      height: 1px;
-      width: 100%;
-      background: var(--red-to-pink-to-purple-horizontal-gradient);
-      margin-block: 1.5rem;
-    }
-  }
-</style>
-
-<main class="main">
-  <div class="content">
-    <div class="left-side">
-      <svg
-        xmlns="http://www.w3.org/2000/svg"
-        viewBox="0 0 982 239"
-        fill="none"
-        class="angular-logo"
-      >
-        <g clip-path="url(#a)">
-          <path
-            fill="url(#b)"
-            d="M388.676 191.625h30.849L363.31 31.828h-35.758l-56.215 159.797h30.848l13.174-39.356h60.061l13.256 39.356Zm-65.461-62.675 21.602-64.311h1.227l21.602 64.311h-44.431Zm126.831-7.527v70.202h-28.23V71.839h27.002v20.374h1.392c2.782-6.71 7.2-12.028 13.255-15.956 6.056-3.927 13.584-5.89 22.503-5.89 8.264 0 15.465 1.8 21.684 5.318 6.137 3.518 10.964 8.673 14.319 15.382 3.437 6.71 5.074 14.81 4.992 24.383v76.175h-28.23v-71.92c0-8.019-2.046-14.237-6.219-18.819-4.173-4.5-9.819-6.791-17.102-6.791-4.91 0-9.328 1.063-13.174 3.272-3.846 2.128-6.792 5.237-9.001 9.328-2.046 4.009-3.191 8.918-3.191 14.728ZM589.233 239c-10.147 0-18.82-1.391-26.103-4.091-7.282-2.7-13.092-6.382-17.511-10.964-4.418-4.582-7.528-9.655-9.164-15.219l25.448-6.136c1.145 2.372 2.782 4.663 4.991 6.954 2.209 2.291 5.155 4.255 8.837 5.81 3.683 1.554 8.428 2.291 14.074 2.291 8.019 0 14.647-1.964 19.884-5.81 5.237-3.845 7.856-10.227 7.856-19.064v-22.665h-1.391c-1.473 2.946-3.601 5.892-6.383 9.001-2.782 3.109-6.464 5.645-10.965 7.691-4.582 2.046-10.228 3.109-17.101 3.109-9.165 0-17.511-2.209-25.039-6.545-7.446-4.337-13.42-10.883-17.757-19.474-4.418-8.673-6.628-19.473-6.628-32.565 0-13.091 2.21-24.301 6.628-33.383 4.419-9.082 10.311-15.955 17.839-20.7 7.528-4.746 15.874-7.037 25.039-7.037 7.037 0 12.846 1.145 17.347 3.518 4.582 2.373 8.182 5.236 10.883 8.51 2.7 3.272 4.746 6.382 6.137 9.327h1.554v-19.8h27.821v121.749c0 10.228-2.454 18.737-7.364 25.447-4.91 6.709-11.538 11.7-20.048 15.055-8.509 3.355-18.165 4.991-28.884 4.991Zm.245-71.266c5.974 0 11.047-1.473 15.302-4.337 4.173-2.945 7.446-7.118 9.573-12.519 2.21-5.482 3.274-12.027 3.274-19.637 0-7.609-1.064-14.155-3.274-19.8-2.127-5.646-5.318-10.064-9.491-13.255-4.174-3.11-9.329-4.746-15.384-4.746s-11.537 1.636-15.792 4.91c-4.173 3.272-7.365 7.772-9.492 13.418-2.128 5.727-3.191 12.191-3.191 19.392 0 7.2 1.063 13.745 3.273 19.228 2.127 5.482 5.318 9.736 9.573 12.764 4.174 3.027 9.41 4.582 15.629 4.582Zm141.56-26.51V71.839h28.23v119.786h-27.412v-21.273h-1.227c-2.7 6.709-7.119 12.191-13.338 16.446-6.137 4.255-13.747 6.382-22.748 6.382-7.855 0-14.81-1.718-20.783-5.237-5.974-3.518-10.72-8.591-14.075-15.382-3.355-6.709-5.073-14.891-5.073-24.464V71.839h28.312v71.921c0 7.609 2.046 13.664 6.219 18.083 4.173 4.5 9.655 6.709 16.365 6.709 4.173 0 8.183-.982 12.111-3.028 3.927-2.045 7.118-5.072 9.655-9.082 2.537-4.091 3.764-9.164 3.764-15.218Zm65.707-109.395v159.796h-28.23V31.828h28.23Zm44.841 162.169c-7.61 0-14.402-1.391-20.457-4.091-6.055-2.7-10.883-6.791-14.32-12.109-3.518-5.319-5.237-11.946-5.237-19.801 0-6.791 1.228-12.355 3.765-16.773 2.536-4.419 5.891-7.937 10.228-10.637 4.337-2.618 9.164-4.664 14.647-6.055 5.4-1.391 11.046-2.373 16.856-3.027 7.037-.737 12.683-1.391 17.102-1.964 4.337-.573 7.528-1.555 9.574-2.782 1.963-1.309 3.027-3.273 3.027-5.973v-.491c0-5.891-1.718-10.391-5.237-13.664-3.518-3.191-8.51-4.828-15.056-4.828-6.955 0-12.356 1.473-16.447 4.5-4.009 3.028-6.71 6.546-8.183 10.719l-26.348-3.764c2.046-7.282 5.483-13.336 10.31-18.328 4.746-4.909 10.638-8.59 17.511-11.045 6.955-2.455 14.565-3.682 22.912-3.682 5.809 0 11.537.654 17.265 2.045s10.965 3.6 15.711 6.71c4.746 3.109 8.51 7.282 11.455 12.6 2.864 5.318 4.337 11.946 4.337 19.883v80.184h-27.166v-16.446h-.9c-1.719 3.355-4.092 6.464-7.201 9.328-3.109 2.864-6.955 5.237-11.619 6.955-4.828 1.718-10.229 2.536-16.529 2.536Zm7.364-20.701c5.646 0 10.556-1.145 14.729-3.354 4.173-2.291 7.364-5.237 9.655-9.001 2.292-3.763 3.355-7.854 3.355-12.273v-14.155c-.9.737-2.373 1.391-4.5 2.046-2.128.654-4.419 1.145-7.037 1.636-2.619.491-5.155.9-7.692 1.227-2.537.328-4.746.655-6.628.901-4.173.572-8.019 1.472-11.292 2.781-3.355 1.31-5.973 3.11-7.855 5.401-1.964 2.291-2.864 5.318-2.864 8.918 0 5.237 1.882 9.164 5.728 11.782 3.682 2.782 8.51 4.091 14.401 4.091Zm64.643 18.328V71.839h27.412v19.965h1.227c2.21-6.955 5.974-12.274 11.292-16.038 5.319-3.763 11.456-5.645 18.329-5.645 1.555 0 3.355.082 5.237.163 1.964.164 3.601.328 4.91.573v25.938c-1.227-.41-3.109-.819-5.646-1.146a58.814 58.814 0 0 0-7.446-.49c-5.155 0-9.738 1.145-13.829 3.354-4.091 2.209-7.282 5.236-9.655 9.164-2.373 3.927-3.519 8.427-3.519 13.5v70.448h-28.312ZM222.077 39.192l-8.019 125.923L137.387 0l84.69 39.192Zm-53.105 162.825-57.933 33.056-57.934-33.056 11.783-28.556h92.301l11.783 28.556ZM111.039 62.675l30.357 73.803H80.681l30.358-73.803ZM7.937 165.115 0 39.192 84.69 0 7.937 165.115Z"
-          />
-          <path
-            fill="url(#c)"
-            d="M388.676 191.625h30.849L363.31 31.828h-35.758l-56.215 159.797h30.848l13.174-39.356h60.061l13.256 39.356Zm-65.461-62.675 21.602-64.311h1.227l21.602 64.311h-44.431Zm126.831-7.527v70.202h-28.23V71.839h27.002v20.374h1.392c2.782-6.71 7.2-12.028 13.255-15.956 6.056-3.927 13.584-5.89 22.503-5.89 8.264 0 15.465 1.8 21.684 5.318 6.137 3.518 10.964 8.673 14.319 15.382 3.437 6.71 5.074 14.81 4.992 24.383v76.175h-28.23v-71.92c0-8.019-2.046-14.237-6.219-18.819-4.173-4.5-9.819-6.791-17.102-6.791-4.91 0-9.328 1.063-13.174 3.272-3.846 2.128-6.792 5.237-9.001 9.328-2.046 4.009-3.191 8.918-3.191 14.728ZM589.233 239c-10.147 0-18.82-1.391-26.103-4.091-7.282-2.7-13.092-6.382-17.511-10.964-4.418-4.582-7.528-9.655-9.164-15.219l25.448-6.136c1.145 2.372 2.782 4.663 4.991 6.954 2.209 2.291 5.155 4.255 8.837 5.81 3.683 1.554 8.428 2.291 14.074 2.291 8.019 0 14.647-1.964 19.884-5.81 5.237-3.845 7.856-10.227 7.856-19.064v-22.665h-1.391c-1.473 2.946-3.601 5.892-6.383 9.001-2.782 3.109-6.464 5.645-10.965 7.691-4.582 2.046-10.228 3.109-17.101 3.109-9.165 0-17.511-2.209-25.039-6.545-7.446-4.337-13.42-10.883-17.757-19.474-4.418-8.673-6.628-19.473-6.628-32.565 0-13.091 2.21-24.301 6.628-33.383 4.419-9.082 10.311-15.955 17.839-20.7 7.528-4.746 15.874-7.037 25.039-7.037 7.037 0 12.846 1.145 17.347 3.518 4.582 2.373 8.182 5.236 10.883 8.51 2.7 3.272 4.746 6.382 6.137 9.327h1.554v-19.8h27.821v121.749c0 10.228-2.454 18.737-7.364 25.447-4.91 6.709-11.538 11.7-20.048 15.055-8.509 3.355-18.165 4.991-28.884 4.991Zm.245-71.266c5.974 0 11.047-1.473 15.302-4.337 4.173-2.945 7.446-7.118 9.573-12.519 2.21-5.482 3.274-12.027 3.274-19.637 0-7.609-1.064-14.155-3.274-19.8-2.127-5.646-5.318-10.064-9.491-13.255-4.174-3.11-9.329-4.746-15.384-4.746s-11.537 1.636-15.792 4.91c-4.173 3.272-7.365 7.772-9.492 13.418-2.128 5.727-3.191 12.191-3.191 19.392 0 7.2 1.063 13.745 3.273 19.228 2.127 5.482 5.318 9.736 9.573 12.764 4.174 3.027 9.41 4.582 15.629 4.582Zm141.56-26.51V71.839h28.23v119.786h-27.412v-21.273h-1.227c-2.7 6.709-7.119 12.191-13.338 16.446-6.137 4.255-13.747 6.382-22.748 6.382-7.855 0-14.81-1.718-20.783-5.237-5.974-3.518-10.72-8.591-14.075-15.382-3.355-6.709-5.073-14.891-5.073-24.464V71.839h28.312v71.921c0 7.609 2.046 13.664 6.219 18.083 4.173 4.5 9.655 6.709 16.365 6.709 4.173 0 8.183-.982 12.111-3.028 3.927-2.045 7.118-5.072 9.655-9.082 2.537-4.091 3.764-9.164 3.764-15.218Zm65.707-109.395v159.796h-28.23V31.828h28.23Zm44.841 162.169c-7.61 0-14.402-1.391-20.457-4.091-6.055-2.7-10.883-6.791-14.32-12.109-3.518-5.319-5.237-11.946-5.237-19.801 0-6.791 1.228-12.355 3.765-16.773 2.536-4.419 5.891-7.937 10.228-10.637 4.337-2.618 9.164-4.664 14.647-6.055 5.4-1.391 11.046-2.373 16.856-3.027 7.037-.737 12.683-1.391 17.102-1.964 4.337-.573 7.528-1.555 9.574-2.782 1.963-1.309 3.027-3.273 3.027-5.973v-.491c0-5.891-1.718-10.391-5.237-13.664-3.518-3.191-8.51-4.828-15.056-4.828-6.955 0-12.356 1.473-16.447 4.5-4.009 3.028-6.71 6.546-8.183 10.719l-26.348-3.764c2.046-7.282 5.483-13.336 10.31-18.328 4.746-4.909 10.638-8.59 17.511-11.045 6.955-2.455 14.565-3.682 22.912-3.682 5.809 0 11.537.654 17.265 2.045s10.965 3.6 15.711 6.71c4.746 3.109 8.51 7.282 11.455 12.6 2.864 5.318 4.337 11.946 4.337 19.883v80.184h-27.166v-16.446h-.9c-1.719 3.355-4.092 6.464-7.201 9.328-3.109 2.864-6.955 5.237-11.619 6.955-4.828 1.718-10.229 2.536-16.529 2.536Zm7.364-20.701c5.646 0 10.556-1.145 14.729-3.354 4.173-2.291 7.364-5.237 9.655-9.001 2.292-3.763 3.355-7.854 3.355-12.273v-14.155c-.9.737-2.373 1.391-4.5 2.046-2.128.654-4.419 1.145-7.037 1.636-2.619.491-5.155.9-7.692 1.227-2.537.328-4.746.655-6.628.901-4.173.572-8.019 1.472-11.292 2.781-3.355 1.31-5.973 3.11-7.855 5.401-1.964 2.291-2.864 5.318-2.864 8.918 0 5.237 1.882 9.164 5.728 11.782 3.682 2.782 8.51 4.091 14.401 4.091Zm64.643 18.328V71.839h27.412v19.965h1.227c2.21-6.955 5.974-12.274 11.292-16.038 5.319-3.763 11.456-5.645 18.329-5.645 1.555 0 3.355.082 5.237.163 1.964.164 3.601.328 4.91.573v25.938c-1.227-.41-3.109-.819-5.646-1.146a58.814 58.814 0 0 0-7.446-.49c-5.155 0-9.738 1.145-13.829 3.354-4.091 2.209-7.282 5.236-9.655 9.164-2.373 3.927-3.519 8.427-3.519 13.5v70.448h-28.312ZM222.077 39.192l-8.019 125.923L137.387 0l84.69 39.192Zm-53.105 162.825-57.933 33.056-57.934-33.056 11.783-28.556h92.301l11.783 28.556ZM111.039 62.675l30.357 73.803H80.681l30.358-73.803ZM7.937 165.115 0 39.192 84.69 0 7.937 165.115Z"
-          />
-        </g>
-        <defs>
-          <radialGradient
-            id="c"
-            cx="0"
-            cy="0"
-            r="1"
-            gradientTransform="rotate(118.122 171.182 60.81) scale(205.794)"
-            gradientUnits="userSpaceOnUse"
-          >
-            <stop stop-color="#FF41F8" />
-            <stop offset=".707" stop-color="#FF41F8" stop-opacity=".5" />
-            <stop offset="1" stop-color="#FF41F8" stop-opacity="0" />
-          </radialGradient>
-          <linearGradient
-            id="b"
-            x1="0"
-            x2="982"
-            y1="192"
-            y2="192"
-            gradientUnits="userSpaceOnUse"
-          >
-            <stop stop-color="#F0060B" />
-            <stop offset="0" stop-color="#F0070C" />
-            <stop offset=".526" stop-color="#CC26D5" />
-            <stop offset="1" stop-color="#7702FF" />
-          </linearGradient>
-          <clipPath id="a"><path fill="#fff" d="M0 0h982v239H0z" /></clipPath>
-        </defs>
-      </svg>
-      <h1>Hello, {{ title() }}</h1>
-      <p>Congratulations! Your app is running. 🎉</p>
-    </div>
-    <div class="divider" role="separator" aria-label="Divider"></div>
-    <div class="right-side">
-      <div class="pill-group">
-        @for (item of [
-          { title: 'Explore the Docs', link: 'https://angular.dev' },
-          { title: 'Learn with Tutorials', link: 'https://angular.dev/tutorials' },
-          { title: 'Prompt and best practices for AI', link: 'https://angular.dev/ai/develop-with-ai'},
-          { title: 'CLI Docs', link: 'https://angular.dev/tools/cli' },
-          { title: 'Angular Language Service', link: 'https://angular.dev/tools/language-service' },
-          { title: 'Angular DevTools', link: 'https://angular.dev/tools/devtools' },
-        ]; track item.title) {
-          <a
-            class="pill"
-            [href]="item.link"
-            target="_blank"
-            rel="noopener"
-          >
-            <span>{{ item.title }}</span>
-            <svg
-              xmlns="http://www.w3.org/2000/svg"
-              height="14"
-              viewBox="0 -960 960 960"
-              width="14"
-              fill="currentColor"
-            >
-              <path
-                d="M200-120q-33 0-56.5-23.5T120-200v-560q0-33 23.5-56.5T200-840h280v80H200v560h560v-280h80v280q0 33-23.5 56.5T760-120H200Zm188-212-56-56 372-372H560v-80h280v280h-80v-144L388-332Z"
-              />
-            </svg>
-          </a>
-        }
-      </div>
-      <div class="social-links">
-        <a
-          href="https://github.com/angular/angular"
-          aria-label="Github"
-          target="_blank"
-          rel="noopener"
-        >
-          <svg
-            width="25"
-            height="24"
-            viewBox="0 0 25 24"
-            fill="none"
-            xmlns="http://www.w3.org/2000/svg"
-            alt="Github"
-          >
-            <path
-              d="M12.3047 0C5.50634 0 0 5.50942 0 12.3047C0 17.7423 3.52529 22.3535 8.41332 23.9787C9.02856 24.0946 9.25414 23.7142 9.25414 23.3871C9.25414 23.0949 9.24389 22.3207 9.23876 21.2953C5.81601 22.0377 5.09414 19.6444 5.09414 19.6444C4.53427 18.2243 3.72524 17.8449 3.72524 17.8449C2.61064 17.082 3.81137 17.0973 3.81137 17.0973C5.04697 17.1835 5.69604 18.3647 5.69604 18.3647C6.79321 20.2463 8.57636 19.7029 9.27978 19.3881C9.39052 18.5924 9.70736 18.0499 10.0591 17.7423C7.32641 17.4347 4.45429 16.3765 4.45429 11.6618C4.45429 10.3185 4.9311 9.22133 5.72065 8.36C5.58222 8.04931 5.16694 6.79833 5.82831 5.10337C5.82831 5.10337 6.85883 4.77319 9.2121 6.36459C10.1965 6.09082 11.2424 5.95546 12.2883 5.94931C13.3342 5.95546 14.3801 6.09082 15.3644 6.36459C17.7023 4.77319 18.7328 5.10337 18.7328 5.10337C19.3942 6.79833 18.9789 8.04931 18.8559 8.36C19.6403 9.22133 20.1171 10.3185 20.1171 11.6618C20.1171 16.3888 17.2409 17.4296 14.5031 17.7321C14.9338 18.1012 15.3337 18.8559 15.3337 20.0084C15.3337 21.6552 15.3183 22.978 15.3183 23.3779C15.3183 23.7009 15.5336 24.0854 16.1642 23.9623C21.0871 22.3484 24.6094 17.7341 24.6094 12.3047C24.6094 5.50942 19.0999 0 12.3047 0Z"
-            />
-          </svg>
-        </a>
-        <a
-          href="https://x.com/angular"
-          aria-label="X"
-          target="_blank"
-          rel="noopener"
-        >
-          <svg
-            width="24"
-            height="24"
-            viewBox="0 0 24 24"
-            fill="none"
-            xmlns="http://www.w3.org/2000/svg"
-            alt="X"
-          >
-            <path
-              d="M18.244 2.25h3.308l-7.227 8.26 8.502 11.24H16.17l-5.214-6.817L4.99 21.75H1.68l7.73-8.835L1.254 2.25H8.08l4.713 6.231zm-1.161 17.52h1.833L7.084 4.126H5.117z"
-            />
-          </svg>
-        </a>
-        <a
-          href="https://www.youtube.com/channel/UCbn1OgGei-DV7aSRo_HaAiw"
-          aria-label="Youtube"
-          target="_blank"
-          rel="noopener"
-        >
-          <svg
-            width="29"
-            height="20"
-            viewBox="0 0 29 20"
-            fill="none"
-            xmlns="http://www.w3.org/2000/svg"
-            alt="Youtube"
-          >
-            <path
-              fill-rule="evenodd"
-              clip-rule="evenodd"
-              d="M27.4896 1.52422C27.9301 1.96749 28.2463 2.51866 28.4068 3.12258C29.0004 5.35161 29.0004 10 29.0004 10C29.0004 10 29.0004 14.6484 28.4068 16.8774C28.2463 17.4813 27.9301 18.0325 27.4896 18.4758C27.0492 18.9191 26.5 19.2389 25.8972 19.4032C23.6778 20 14.8068 20 14.8068 20C14.8068 20 5.93586 20 3.71651 19.4032C3.11363 19.2389 2.56449 18.9191 2.12405 18.4758C1.68361 18.0325 1.36732 17.4813 1.20683 16.8774C0.613281 14.6484 0.613281 10 0.613281 10C0.613281 10 0.613281 5.35161 1.20683 3.12258C1.36732 2.51866 1.68361 1.96749 2.12405 1.52422C2.56449 1.08095 3.11363 0.76113 3.71651 0.596774C5.93586 0 14.8068 0 14.8068 0C14.8068 0 23.6778 0 25.8972 0.596774C26.5 0.76113 27.0492 1.08095 27.4896 1.52422ZM19.3229 10L11.9036 5.77905V14.221L19.3229 10Z"
-            />
-          </svg>
-        </a>
-      </div>
-    </div>
-  </div>
-</main>
-
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-<!-- * * * * * * * * * * * The content above * * * * * * * * * * * * -->
-<!-- * * * * * * * * * * is only a placeholder * * * * * * * * * * * -->
-<!-- * * * * * * * * * * and can be replaced.  * * * * * * * * * * * -->
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-<!-- * * * * * * * * * * End of Placeholder  * * * * * * * * * * * * -->
-<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
-
-
 <router-outlet />

frontend/src/app/app.ts

@@ -5,7 +5,7 @@ import { RouterOutlet } from '@angular/router';
   selector: 'app-root',
   standalone: true,
   imports: [RouterOutlet],
-  template: `<router-outlet />`,
+  template: '<router-outlet />',
   styles: [`
     :host {
       display: block;

frontend/src/app/command-hub/components/agent-card/agent-card.component.html

@@ -2,12 +2,19 @@
 <!-- AgentCard — per spec Section 7.3                                            -->
 <!-- Integrates: Status Badge · Task Progress Bar · Quick‑Jump Button           -->
 <!-- Left‑border accent matches status color. role="article" + aria‑labels.     -->
+<!-- Enhanced: data-status attribute, elapsed time, design tokens.              -->
 <!-- ========================================================================== -->
 <article
   class="agent-card"
   role="article"
-  [attr.aria-label]="displayName + ' — ' + statusLabel()"
+  [attr.data-status]="status"
+  [attr.aria-label]="(displayName || agentId) + ' — ' + statusLabel()"
   [style.border-left-color]="statusBorderColor()"
+  (click)="cardClick.emit(sessionKey)"
+  appLongPress
+  [appLongPressDuration]="500"
+  (appLongPress)="cardLongPress.emit(sessionKey)"
+  tabindex="0"
 >
 
   <!-- ── Header: status badge + agent info ── -->
@@ -27,19 +34,20 @@
   </div>
 
   <!-- ── Body: current task ── -->
-  <div class="agent-card__body" *ngIf="task || status === 'error'">
+  <div class="agent-card__body" *ngIf="task || isError()">
     <p
       class="agent-card__task"
-      [attr.aria-label]="'Current task: ' + (status === 'error' ? errorMessage : task)"
+      [class.agent-card__task--error]="isError()"
+      [attr.aria-label]="'Current task: ' + (isError() ? errorMessage || task : task)"
     >
-      {{ status === 'error' ? errorMessage || task : task }}
+      {{ isError() ? errorMessage || task : task }}
     </p>
   </div>
 
   <!-- ── Task Progress Bar ── -->
   <div
     class="agent-card__progress"
-    *ngIf="progress > 0 && status !== 'error'"
+    *ngIf="showProgress()"
     [attr.aria-label]="'Task progress: ' + progress + '%'"
   >
     <mat-progress-bar
@@ -50,6 +58,16 @@
     <span class="agent-card__progress-label text-mono">{{ progress }}%</span>
   </div>
 
+  <!-- ── Elapsed Time ── -->
+  <div
+    class="agent-card__elapsed"
+    *ngIf="taskElapsed && isActiveLike()"
+    [attr.aria-label]="'Elapsed: ' + taskElapsed"
+  >
+    <mat-icon aria-hidden="true" class="agent-card__elapsed-icon">schedule</mat-icon>
+    <span class="text-mono">{{ taskElapsed }}</span>
+  </div>
+
   <!-- ── Footer: channel + last activity + quick‑jump ── -->
   <div class="agent-card__footer">
     <div class="agent-card__meta">

frontend/src/app/command-hub/components/agent-card/agent-card.component.scss

@@ -2,15 +2,18 @@
 // AgentCard — M3 tactical dark styling
 // Per spec Section 7.3: left‑border accent, status‑aware coloring,
 // responsive card layout with 320px min‑width.
+// Enhanced: data-status selectors, elapsed time, design token imports.
 // ============================================================================
 
+@use 'tokens' as tokens;
+
 .agent-card {
   display: flex;
   flex-direction: column;
-  min-width: var(--cc-card-min-width);
-  padding: var(--cc-card-padding);
+  min-width: tokens.$cc-card-min-width;
+  padding: tokens.$cc-card-padding;
   background-color: var(--cc-surface-container);
-  border-radius: var(--cc-card-border-radius);
+  border-radius: tokens.$cc-card-border-radius;
   border-left: 4px solid var(--status-offline); // default; overridden by [style]
   border-top: 1px solid var(--cc-outline);
   border-right: 1px solid var(--cc-outline);
@@ -23,6 +26,14 @@
     box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
   }
 
+  // CUB-26: Card is now clickable for session drawer
+  cursor: pointer;
+
+  &:focus-visible {
+    outline: 2px solid var(--color-primary);
+    outline-offset: 2px;
+  }
+
   &:focus-within {
     outline: 2px solid var(--status-active);
     outline-offset: 2px;
@@ -48,11 +59,6 @@
   letter-spacing: 0.02em;
   text-transform: uppercase;
   color: var(--cc-on-surface);
-
-  // Per‑status background tints
-  .status-dot--active + & {
-    background-color: var(--status-active-bg);
-  }
 }
 
 .agent-card__status-label {
@@ -94,8 +100,7 @@
   color: var(--cc-on-surface);
   line-height: 1.4;
 
-  // Error messages get distinct styling
-  .agent-card--error & {
+  &--error {
     color: var(--status-error);
   }
 }
@@ -109,6 +114,7 @@
 }
 
 .agent-card__progress-label {
+  font-family: var(--cc-font-mono);
   font-size: 12px;
   font-weight: 500;
   color: var(--cc-on-surface-variant);
@@ -130,6 +136,23 @@
   }
 }
 
+// ── Elapsed Time ──
+.agent-card__elapsed {
+  display: flex;
+  align-items: center;
+  gap: 4px;
+  font-size: 12px;
+  color: var(--cc-on-surface-variant);
+  padding: 2px 0;
+}
+
+.agent-card__elapsed-icon {
+  font-size: 14px;
+  width: 14px;
+  height: 14px;
+  color: var(--status-thinking);
+}
+
 // ── Footer ──
 .agent-card__footer {
   display: flex;
@@ -153,7 +176,6 @@
   color: var(--cc-on-surface-variant);
 }
 
-.agent-card__channel-icon,
 .agent-card__channel .mat-icon {
   font-size: 14px;
   width: 14px;
@@ -169,7 +191,6 @@
 .agent-card__jump {
   flex-shrink: 0;
 
-  // Match M3 text button sizing
   .mat-mdc-button {
     min-width: 36px;
     padding: 0 8px;
@@ -184,11 +205,9 @@
 }
 
 // ── Status‑specific background tints for badge ──
-// We use the global status-dot classes from styles.scss and pair them
-// with contextual background-color overrides here.
+// Using data-status attribute selectors for clean styling.
 
-.agent-card[data-status="active"] .agent-card__badge,
-.agent-card .status-dot--active ~ .agent-card__badge {
+.agent-card[data-status="active"] .agent-card__badge {
   background-color: var(--status-active-bg);
 }
 
@@ -204,8 +223,22 @@
   background-color: var(--status-error-bg);
 }
 
+.agent-card[data-status="offline"] .agent-card__badge {
+  background-color: var(--cc-surface-container-high);
+}
+
+// ── Active‑like pulse on card border ──
+.agent-card[data-status="active"],
+.agent-card[data-status="thinking"] {
+  border-left-width: 4px;
+}
+
+.agent-card[data-status="error"] {
+  border-left-color: var(--status-error);
+}
+
 // ── Responsive ──
-@media (max-width: 599px) {
+@media (max-width: tokens.$cc-breakpoint-mobile) {
   .agent-card {
     min-width: unset;
     padding: 16px;

frontend/src/app/command-hub/components/agent-card/agent-card.component.ts

@@ -1,8 +1,14 @@
 import {
   ChangeDetectionStrategy,
   Component,
+  EventEmitter,
   Input,
+  OnDestroy,
+  Output,
   computed,
+  effect,
+  inject,
+  signal,
 } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { RouterModule } from '@angular/router';
@@ -11,11 +17,19 @@ import { MatButtonModule } from '@angular/material/button';
 import { MatProgressBarModule } from '@angular/material/progress-bar';
 import { MatTooltipModule } from '@angular/material/tooltip';
 import { AgentStatus } from '../../../models/agent.model';
+import { LongPressDirective } from '../../../directives/long-press.directive';
+import {
+  STATUS_COLORS,
+  STATUS_LABELS,
+  CHANNEL_ICONS,
+} from '../../../design/tokens';
 
 // ============================================================================
 // AgentCard Component
 // Per spec Section 7.3: Composes Agent Status Badge, Task Progress Bar,
 // and Quick‑Jump Button into a card with left‑border status accent.
+// CUB-26: Emits cardClick and cardLongPress for drawer/modal integration.
+// Enhanced with data-status attribute, elapsed time, and design tokens.
 // ============================================================================
 
 @Component({
@@ -28,12 +42,13 @@ import { AgentStatus } from '../../../models/agent.model';
     MatButtonModule,
     MatProgressBarModule,
     MatTooltipModule,
+    LongPressDirective,
   ],
   templateUrl: './agent-card.component.html',
   styleUrl: './agent-card.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class AgentCardComponent {
+export class AgentCardComponent implements OnDestroy {
   // --- Six required inputs per spec ---
 
   /** Agent status — drives badge color and left‑border accent */
@@ -68,7 +83,26 @@ export class AgentCardComponent {
   /** Error message (shown only when status is 'error') */
   @Input() errorMessage = '';
 
-  // --- Computed values ---
+  /** Elapsed time string, e.g. "04m 12s" */
+  @Input() taskElapsed = '';
+
+  // --- CUB-26: Outputs for drawer/modal integration ---
+
+  /** Emitted when the card is clicked — opens the session drawer. */
+  @Output() readonly cardClick = new EventEmitter<string>();
+
+  /** Emitted when the card is long-pressed — bypasses drawer, opens session log directly. */
+  @Output() readonly cardLongPress = new EventEmitter<string>();
+
+  // --- Internal state ---
+
+  /** Timer for refreshing relative-time label */
+  private _timer: ReturnType<typeof setInterval> | null = null;
+
+  /** Internal signal to trigger relative-time recomputation */
+  private readonly _tick = signal(0);
+
+  // --- Computed values using design tokens ---
 
   /** Map status → CSS custom property for the left‑border accent */
   readonly statusBorderColor = computed(() => {
@@ -82,46 +116,68 @@ export class AgentCardComponent {
     return map[this.status] ?? 'var(--status-offline)';
   });
 
-  /** Human‑readable status label */
-  readonly statusLabel = computed(() => {
-    const labels: Record<AgentStatus, string> = {
-      active: 'Active',
-      idle: 'Idle',
-      thinking: 'Thinking…',
-      error: 'Error',
-      offline: 'Offline',
-    };
-    return labels[this.status] ?? this.status;
-  });
+  /** Human‑readable status label (from design tokens) */
+  readonly statusLabel = computed(() => STATUS_LABELS[this.status] ?? this.status);
 
   /** CSS class suffix for the status badge dot */
   readonly statusDotClass = computed(() => `status-dot--${this.status}`);
 
-  /** Material icon name for the channel */
-  readonly channelIcon = computed(() => {
-    const icons: Record<string, string> = {
-      telegram: 'telegram',  // falls back to font icon if no SVG registered
-      slack: 'chat',
-      discord: 'forum',
-      whatsapp: 'chat',
-      webchat: 'language',
-      email: 'email',
-    };
-    return icons[this.channel] ?? 'chat';
+  /** Material icon name for the channel (from design tokens) */
+  readonly channelIcon = computed(() => CHANNEL_ICONS[this.channel] ?? 'chat');
+
+  /** Relative time string for lastActivity, refreshed every 30s */
+  readonly lastActivityLabel = computed(() => {
+    // Read tick to create dependency that forces recomputation
+    this._tick();
+    return this._relativeTime(this.lastActivity);
   });
 
-  /** Relative time string for lastActivity */
-  readonly lastActivityLabel = computed(() => {
-    if (!this.lastActivity) return '';
+  /** Quick‑jump route derived from sessionKey */
+  readonly jumpRoute = computed(() => `/sessions/${this.sessionKey}`);
+
+  /** Whether progress bar should show */
+  readonly showProgress = computed(() => this.progress > 0 && this.status !== 'error');
+
+  /** Whether error state is active */
+  readonly isError = computed(() => this.status === 'error');
+
+  /** Whether card is in an active-like state (active or thinking) */
+  readonly isActiveLike = computed(() => this.status === 'active' || this.status === 'thinking');
+
+  constructor() {
+    // Start the relative-time refresh timer
+    this._startTimer();
+  }
+
+  ngOnDestroy(): void {
+    this._stopTimer();
+  }
+
+  // --- Private helpers ---
+
+  private _relativeTime(date: Date | null | undefined): string {
+    if (!date) return '';
     const now = Date.now();
-    const then = this.lastActivity.getTime();
+    const then = date.getTime();
     const diffSec = Math.max(0, Math.floor((now - then) / 1000));
     if (diffSec < 60) return 'just now';
     if (diffSec < 3600) return `${Math.floor(diffSec / 60)}m ago`;
     if (diffSec < 86400) return `${Math.floor(diffSec / 3600)}h ago`;
     return `${Math.floor(diffSec / 86400)}d ago`;
-  });
+  }
 
-  /** Quick‑jump route derived from sessionKey */
-  readonly jumpRoute = computed(() => `/sessions/${this.sessionKey}`);
+  private _startTimer(): void {
+    this._stopTimer();
+    this._timer = setInterval(() => {
+      // Increment tick to force lastActivityLabel recomputation
+      this._tick.update(v => v + 1);
+    }, 30_000);
+  }
+
+  private _stopTimer(): void {
+    if (this._timer) {
+      clearInterval(this._timer);
+      this._timer = null;
+    }
+  }
 }

frontend/src/app/components/adaptive-navigation/adaptive-navigation.component.scss

@@ -1,14 +1,16 @@
 // ============================================================================
 // Adaptive Navigation — Desktop sidebar / Mobile header
-// Desktop (≥768px): 72px sidebar with full navigation items
-// Mobile (<768px):  56px compact header with hamburger menu
+// Per CUB-27 spec breakpoints:
+//   Compact  (0–599px):  Mobile header + hamburger + drawer
+//   Medium   (600–1023px): Collapsed sidebar (icon-only, 72px)
+//   Expanded (≥1024px):  Full sidebar with labels (72px collapsed, 256px expanded)
 // ============================================================================
 
 // ---------------------------------------------------------------------------
-// Desktop Sidebar (visible ≥768px)
+// Desktop Sidebar (visible ≥600px)
 // ---------------------------------------------------------------------------
 .adaptive-nav__sidebar {
-  display: flex;
+  display: none; // Hidden by default (mobile-first)
   flex-direction: column;
   width: var(--cc-nav-rail-collapsed-width, 72px);
   min-height: 100vh;
@@ -152,12 +154,12 @@
 }
 
 // ---------------------------------------------------------------------------
-// Mobile Header (visible <768px)
+// Mobile Header (visible <600px only)
 // ---------------------------------------------------------------------------
 .adaptive-nav__mobile-header {
   display: none; // Hidden on desktop, shown on mobile via media query
   align-items: center;
-  height: 56px;
+  height: var(--cc-header-height-compact, 56px);
   padding: 0 12px;
   background-color: var(--cc-surface-container-high);
   border-bottom: 1px solid var(--cc-outline);
@@ -167,6 +169,8 @@
 
 .adaptive-nav__hamburger {
   color: var(--cc-on-surface-variant) !important;
+  min-width: 48px;
+  min-height: 48px;
 
   &:hover {
     color: var(--cc-on-surface) !important;
@@ -196,6 +200,8 @@
 
 .adaptive-nav__mobile-action {
   color: var(--cc-on-surface-variant) !important;
+  min-width: 48px;
+  min-height: 48px;
 
   &:hover {
     color: var(--cc-on-surface) !important;
@@ -214,7 +220,7 @@
 
 .adaptive-nav__mobile-drawer {
   position: fixed;
-  top: 56px; // Below header
+  top: var(--cc-header-height-compact, 56px); // Below header
   left: 0;
   bottom: 0;
   width: 280px;
@@ -271,34 +277,73 @@
 }
 
 // ---------------------------------------------------------------------------
-// Media Queries — Layout Switch
+// Media Queries — Layout Switch (CUB-27 breakpoints)
 // ---------------------------------------------------------------------------
-// Desktop (≥768px): Show sidebar, hide mobile header
-// Mobile (<768px):  Hide sidebar, show compact header
-// ---------------------------------------------------------------------------
-@media (min-width: 768px) {
+
+// Compact (0–599px): Show mobile header, hide sidebar
+@media (max-width: 599px) {
+  .adaptive-nav__sidebar {
+    display: none;
+  }
+
+  .adaptive-nav__mobile-header {
+    display: flex;
+  }
+
+  // Hide mobile drawer and overlay on desktop
+  .adaptive-nav__overlay,
+  .adaptive-nav__mobile-drawer {
+    // These are conditional via @if in template, no display:none needed
+  }
+}
+
+// Medium (600–1023px): Show collapsed sidebar (icon-only), hide mobile
+@media (min-width: 600px) and (max-width: 1023px) {
   .adaptive-nav__sidebar {
     display: flex;
+    width: var(--cc-nav-rail-collapsed-width, 72px);
+  }
+
+  // Hide labels on medium (collapsed)
+  .adaptive-nav__sidebar-label,
+  .adaptive-nav__brand {
+    display: none;
+  }
+
+  .adaptive-nav__sidebar-header {
+    justify-content: center;
+  }
+
+  .adaptive-nav__sidebar-item {
+    flex-direction: column;
+    justify-content: center;
   }
 
   .adaptive-nav__mobile-header {
     display: none;
   }
 
-  // Hide mobile drawer and overlay on desktop
   .adaptive-nav__overlay,
   .adaptive-nav__mobile-drawer {
     display: none;
   }
 }
 
-@media (max-width: 767px) {
+// Expanded (≥1024px): Show sidebar with labels
+@media (min-width: 1024px) {
   .adaptive-nav__sidebar {
-    display: none;
+    display: flex;
+    width: var(--cc-nav-rail-collapsed-width, 72px);
+    transition: width 200ms cubic-bezier(0.4, 0, 0.2, 1);
   }
 
   .adaptive-nav__mobile-header {
-    display: flex;
+    display: none;
+  }
+
+  .adaptive-nav__overlay,
+  .adaptive-nav__mobile-drawer {
+    display: none;
   }
 }
 
@@ -313,4 +358,8 @@
   .adaptive-nav__mobile-drawer {
     animation: none;
   }
+
+  .adaptive-nav__sidebar {
+    transition: none;
+  }
 }

frontend/src/app/components/adaptive-navigation/adaptive-navigation.component.ts

@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, Component, signal } from '@angular/core';
+import { ChangeDetectionStrategy, Component, signal, HostListener, OnDestroy, OnInit } from '@angular/core';
 import { RouterLink, RouterLinkActive } from '@angular/router';
 import { MatIconModule } from '@angular/material/icon';
 import { MatButtonModule } from '@angular/material/button';
@@ -8,13 +8,14 @@ import { NAV_DESTINATIONS } from '../../models/nav.model';
 
 /**
  * Adaptive Navigation Component — switches between desktop sidebar
- * and mobile header layouts using CSS media queries.
+ * and mobile header layouts using CSS media queries + JS breakpoint sync.
  *
- * Desktop (≥768px): 72px sidebar with full navigation items.
- * Mobile (<768px):  56px compact header with hamburger menu.
+ * Per CUB-27 spec breakpoints:
+ *   Compact  (0–599px):  Mobile header + hamburger + bottom nav
+ *   Medium   (600–1023px): Collapsed sidebar (icon-only)
+ *   Expanded (≥1024px):  Expandable sidebar (hover/click)
  *
- * The LIVE status indicator is visible in both layouts.
- * Per spec Section 3.1 (kiosk) and 3.2 (mobile).
+ * The LIVE status indicator is visible in all layouts.
  */
 @Component({
   selector: 'app-adaptive-navigation',
@@ -31,7 +32,7 @@ import { NAV_DESTINATIONS } from '../../models/nav.model';
   styleUrl: './adaptive-navigation.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class AdaptiveNavigationComponent {
+export class AdaptiveNavigationComponent implements OnInit, OnDestroy {
   /** Navigation destinations shared with other nav components */
   protected readonly destinations = NAV_DESTINATIONS;
 
@@ -41,6 +42,22 @@ export class AdaptiveNavigationComponent {
   /** Live connection status */
   protected readonly isConnected = signal(true);
 
+  /** Responsive breakpoint state */
+  protected readonly isMedium = signal(false);
+  protected readonly isExpanded = signal(false);
+
+  private readonly COMPACT_MAX = 599;
+  private readonly MEDIUM_MAX = 1023;
+
+  ngOnInit(): void {
+    this.updateBreakpoint();
+  }
+
+  @HostListener('window:resize')
+  onResize(): void {
+    this.updateBreakpoint();
+  }
+
   /** Toggle mobile menu */
   toggleMobileMenu(): void {
     this.mobileMenuOpen.update((v) => !v);
@@ -50,4 +67,18 @@ export class AdaptiveNavigationComponent {
   closeMobileMenu(): void {
     this.mobileMenuOpen.set(false);
   }
+
+  private updateBreakpoint(): void {
+    const w = window.innerWidth;
+    this.isMedium.set(w >= this.COMPACT_MAX + 1 && w <= this.MEDIUM_MAX);
+    this.isExpanded.set(w > this.MEDIUM_MAX);
+    // Close mobile menu when switching to desktop
+    if (w > this.COMPACT_MAX) {
+      this.mobileMenuOpen.set(false);
+    }
+  }
+
+  ngOnDestroy(): void {
+    // HostListener auto-unsubscribes
+  }
 }

frontend/src/app/components/agent-session-drawer/agent-session-drawer.component.html

@@ -0,0 +1,140 @@
+<!-- ============================================================================
+  Agent Session Drawer — CUB-26
+  Desktop: 480px side drawer slides from right with modal overlay.
+  Mobile: Bottom sheet slides up from bottom.
+  Shows: Agent name, status badge, session key, live log tail,
+          recent messages, and action buttons.
+  ============================================================================-->
+
+<!-- Backdrop overlay -->
+@if (isOpen()) {
+  <div
+    class="session-drawer-backdrop"
+    (click)="onBackdropClick()"
+    [class.session-drawer-backdrop--visible]="isOpen()"
+  ></div>
+}
+
+<!-- Drawer panel -->
+<div
+  #drawerPanel
+  class="session-drawer"
+  [class.session-drawer--open]="isOpen()"
+  [class.session-drawer--mobile]="isMobile"
+  (keydown)="onDrawerKeydown($event)"
+  role="dialog"
+  aria-label="Agent session details"
+  [attr.aria-hidden]="!isOpen()"
+>
+  <!-- Header -->
+  <div class="session-drawer__header">
+    @if (agent) {
+      <div class="session-drawer__header-identity">
+        <span class="status-dot {{ getStatusClass(agent.status) }}" [attr.aria-label]="getStatusLabel(agent.status)"></span>
+        <div class="session-drawer__header-text">
+          <h2 class="session-drawer__title">{{ agent.displayName }}</h2>
+          <span class="session-drawer__role">{{ agent.role }}</span>
+        </div>
+      </div>
+    }
+    <button
+      class="session-drawer__close-btn"
+      type="button"
+      aria-label="Close drawer"
+      (click)="close()"
+      matIconButton
+    >
+      <mat-icon>close</mat-icon>
+    </button>
+  </div>
+
+  <!-- Content area -->
+  @if (agent) {
+    <div class="session-drawer__content">
+
+      <!-- Status & Session Key Section -->
+      <section class="session-drawer__section">
+        <div class="session-drawer__meta-row">
+          <span class="session-drawer__status-chip {{ getStatusChipColor(agent.status) }}">
+            {{ getStatusLabel(agent.status) }}
+          </span>
+          @if (agent.channel) {
+            <span class="session-drawer__channel-badge">
+              <mat-icon class="session-drawer__channel-icon">chat</mat-icon>
+              {{ agent.channel }}
+            </span>
+          }
+        </div>
+        <div class="session-drawer__session-key">
+          <span class="session-drawer__label">Session Key</span>
+          <code class="session-drawer__key-value">{{ agent.sessionKey }}</code>
+        </div>
+        @if (agent.currentTask) {
+          <div class="session-drawer__task-info">
+            <span class="session-drawer__label">Current Task</span>
+            <span class="session-drawer__task-text">{{ agent.currentTask }}</span>
+          </div>
+        }
+        <div class="session-drawer__last-activity">
+          <span class="session-drawer__label">Last Activity</span>
+          <span class="session-drawer__activity-time">{{ formatRelativeTime(agent.lastActivity) }}</span>
+        </div>
+      </section>
+
+      <!-- Recent Messages Section -->
+      <section class="session-drawer__section">
+        <h3 class="session-drawer__section-title">Recent Messages</h3>
+        <div class="session-drawer__messages">
+          @for (msg of recentMessages(); track msg.id) {
+            <div class="session-drawer__message session-drawer__message--{{ msg.sender }}">
+              <span class="session-drawer__message-sender">
+                {{ msg.sender === 'agent' ? agent.displayName : 'You' }}
+              </span>
+              <p class="session-drawer__message-text">{{ msg.content }}</p>
+              <span class="session-drawer__message-time">{{ formatTime(msg.timestamp) }}</span>
+            </div>
+          } @empty {
+            <p class="session-drawer__empty-state">No recent messages</p>
+          }
+        </div>
+      </section>
+
+      <!-- Live Log Tail Section -->
+      <section class="session-drawer__section">
+        <h3 class="session-drawer__section-title">Live Log</h3>
+        <div class="session-drawer__log-container">
+          @for (line of logLines(); track $index) {
+            <div class="session-drawer__log-line {{ getLogLevelClass(line.level) }}">
+              <span class="session-drawer__log-time">{{ formatTime(line.timestamp) }}</span>
+              <span class="session-drawer__log-level">{{ line.level.toUpperCase() }}</span>
+              <span class="session-drawer__log-message">{{ line.message }}</span>
+            </div>
+          } @empty {
+            <p class="session-drawer__empty-state">No log output</p>
+          }
+        </div>
+      </section>
+    </div>
+  }
+
+  <!-- Action buttons (sticky footer) -->
+  <div class="session-drawer__actions">
+    <button
+      class="session-drawer__action-btn session-drawer__action-btn--primary"
+      mat-raised-button
+      color="primary"
+      (click)="onOpenSession()"
+    >
+      <mat-icon>open_in_new</mat-icon>
+      Open Full Session
+    </button>
+    <button
+      class="session-drawer__action-btn session-drawer__action-btn--secondary"
+      mat-stroked-button
+      (click)="onPinToDashboard()"
+    >
+      <mat-icon>push_pin</mat-icon>
+      Pin to Dashboard
+    </button>
+  </div>
+</div>

frontend/src/app/components/agent-session-drawer/agent-session-drawer.component.scss

@@ -0,0 +1,500 @@
+// ============================================================================
+// Agent Session Drawer — CUB-26
+// Desktop: 480px side drawer slides from right with modal overlay.
+// Mobile: Bottom sheet slides up from bottom.
+// Uses Control Center design tokens from CUB-21.
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// Backdrop
+// ---------------------------------------------------------------------------
+.session-drawer-backdrop {
+  position: fixed;
+  inset: 0;
+  background-color: rgba(0, 0, 0, 0.6);
+  backdrop-filter: blur(4px);
+  z-index: 998;
+  opacity: 0;
+  transition: opacity 200ms ease-out;
+
+  &--visible {
+    opacity: 1;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Drawer Panel — Desktop: Side drawer from right
+// ---------------------------------------------------------------------------
+.session-drawer {
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  width: 480px;
+  max-width: 100vw;
+  background-color: var(--cc-surface-container);
+  border-left: 1px solid var(--cc-outline);
+  z-index: 999;
+  display: flex;
+  flex-direction: column;
+  transform: translateX(100%);
+  transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
+  box-shadow: -4px 0 32px rgba(0, 0, 0, 0.4);
+  overflow: hidden;
+
+  &--open {
+    transform: translateX(0);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Mobile: Bottom Sheet — slides up from bottom
+  // ---------------------------------------------------------------------------
+  &--mobile {
+    top: auto;
+    right: 0;
+    bottom: 0;
+    left: 0;
+    width: 100%;
+    max-width: 100vw;
+    max-height: 85vh;
+    border-left: none;
+    border-top: 1px solid var(--cc-outline);
+    border-radius: 20px 20px 0 0;
+    transform: translateY(100%);
+    box-shadow: 0 -4px 32px rgba(0, 0, 0, 0.4);
+
+    &.session-drawer--open {
+      transform: translateY(0);
+    }
+
+    // Drag handle for mobile bottom sheet
+    &::before {
+      content: '';
+      display: block;
+      width: 32px;
+      height: 4px;
+      border-radius: 2px;
+      background: var(--cc-on-surface-variant);
+      opacity: 0.4;
+      margin: 8px auto 4px;
+    }
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Header
+// ---------------------------------------------------------------------------
+.session-drawer__header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 20px 24px 16px;
+  border-bottom: 1px solid var(--cc-outline);
+  flex-shrink: 0;
+}
+
+.session-drawer__header-identity {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  min-width: 0;
+  flex: 1;
+}
+
+.session-drawer__header-text {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0;
+}
+
+.session-drawer__title {
+  font-size: 20px;
+  font-weight: 600;
+  color: var(--cc-on-surface);
+  margin: 0;
+  letter-spacing: -0.01em;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.session-drawer__role {
+  font-size: 13px;
+  color: var(--cc-on-surface-variant);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.session-drawer__close-btn {
+  --mat-icon-button-state-layer-color: transparent;
+  color: var(--cc-on-surface-variant);
+  flex-shrink: 0;
+
+  &:hover {
+    color: var(--cc-on-surface);
+  }
+
+  &:focus-visible {
+    outline: 2px solid var(--color-primary);
+    outline-offset: 2px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Content — scrollable area
+// ---------------------------------------------------------------------------
+.session-drawer__content {
+  flex: 1;
+  overflow-y: auto;
+  padding: 0 24px 16px;
+}
+
+// ---------------------------------------------------------------------------
+// Sections
+// ---------------------------------------------------------------------------
+.session-drawer__section {
+  padding: 16px 0;
+  border-bottom: 1px solid var(--cc-outline);
+
+  &:last-child {
+    border-bottom: none;
+  }
+}
+
+.session-drawer__section-title {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--cc-on-surface-variant);
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  margin: 0 0 12px;
+}
+
+// ---------------------------------------------------------------------------
+// Meta Row — Status + Channel
+// ---------------------------------------------------------------------------
+.session-drawer__meta-row {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin-bottom: 12px;
+}
+
+.session-drawer__status-chip {
+  display: inline-flex;
+  align-items: center;
+  padding: 4px 12px;
+  border-radius: 8px;
+  font-size: 12px;
+  font-weight: 600;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+
+  &.status-chip--active {
+    background-color: var(--status-active-bg);
+    color: var(--status-active);
+  }
+
+  &.status-chip--idle {
+    background-color: var(--status-idle-bg);
+    color: var(--status-idle);
+  }
+
+  &.status-chip--thinking {
+    background-color: var(--status-thinking-bg);
+    color: var(--status-thinking);
+  }
+
+  &.status-chip--error {
+    background-color: var(--status-error-bg);
+    color: var(--status-error);
+  }
+
+  &.status-chip--offline {
+    background-color: rgba(100, 116, 139, 0.12);
+    color: var(--status-offline);
+  }
+}
+
+.session-drawer__channel-badge {
+  display: inline-flex;
+  align-items: center;
+  gap: 4px;
+  padding: 4px 10px;
+  border-radius: 8px;
+  background: var(--cc-surface-container-high);
+  font-size: 12px;
+  color: var(--cc-on-surface-variant);
+}
+
+.session-drawer__channel-icon {
+  font-size: 14px;
+  width: 14px;
+  height: 14px;
+}
+
+// ---------------------------------------------------------------------------
+// Session Key
+// ---------------------------------------------------------------------------
+.session-drawer__session-key {
+  margin-bottom: 12px;
+}
+
+.session-drawer__label {
+  display: block;
+  font-size: 11px;
+  font-weight: 500;
+  color: var(--cc-on-surface-variant);
+  text-transform: uppercase;
+  letter-spacing: 0.06em;
+  margin-bottom: 4px;
+}
+
+.session-drawer__key-value {
+  display: block;
+  font-family: var(--cc-font-mono);
+  font-size: 12px;
+  color: var(--color-secondary);
+  background: var(--cc-surface);
+  padding: 8px 12px;
+  border-radius: 8px;
+  border: 1px solid var(--cc-outline);
+  word-break: break-all;
+  line-height: 1.5;
+  user-select: all;
+}
+
+// ---------------------------------------------------------------------------
+// Task Info
+// ---------------------------------------------------------------------------
+.session-drawer__task-info {
+  margin-bottom: 12px;
+}
+
+.session-drawer__task-text {
+  font-size: 14px;
+  color: var(--cc-on-surface);
+  line-height: 1.4;
+}
+
+// ---------------------------------------------------------------------------
+// Last Activity
+// ---------------------------------------------------------------------------
+.session-drawer__last-activity {
+  margin-bottom: 0;
+}
+
+.session-drawer__activity-time {
+  font-size: 14px;
+  color: var(--cc-on-surface);
+}
+
+// ---------------------------------------------------------------------------
+// Recent Messages
+// ---------------------------------------------------------------------------
+.session-drawer__messages {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+}
+
+.session-drawer__message {
+  padding: 10px 14px;
+  border-radius: 12px;
+  max-width: 100%;
+
+  &--agent {
+    background: var(--cc-surface-container-high);
+    border: 1px solid var(--cc-outline);
+  }
+
+  &--user {
+    background: rgba(56, 189, 248, 0.08);
+    border: 1px solid rgba(56, 189, 248, 0.15);
+  }
+}
+
+.session-drawer__message-sender {
+  display: block;
+  font-size: 12px;
+  font-weight: 600;
+  color: var(--cc-on-surface-variant);
+  margin-bottom: 4px;
+}
+
+.session-drawer__message-text {
+  font-size: 14px;
+  color: var(--cc-on-surface);
+  margin: 0;
+  line-height: 1.5;
+  word-wrap: break-word;
+}
+
+.session-drawer__message-time {
+  display: block;
+  font-size: 11px;
+  color: var(--cc-on-surface-variant);
+  margin-top: 4px;
+  font-family: var(--cc-font-mono);
+}
+
+// ---------------------------------------------------------------------------
+// Live Log Container
+// ---------------------------------------------------------------------------
+.session-drawer__log-container {
+  background: var(--cc-surface);
+  border: 1px solid var(--cc-outline);
+  border-radius: 10px;
+  padding: 10px 12px;
+  max-height: 260px;
+  overflow-y: auto;
+  font-family: var(--cc-font-mono);
+  font-size: 12px;
+  line-height: 1.7;
+}
+
+.session-drawer__log-line {
+  display: flex;
+  gap: 8px;
+  padding: 1px 0;
+  white-space: nowrap;
+
+  &--info {
+    color: var(--cc-on-surface);
+  }
+
+  &--warn {
+    color: #FBBF24;
+  }
+
+  &--error {
+    color: var(--status-error);
+  }
+
+  &--debug {
+    color: var(--cc-on-surface-variant);
+  }
+}
+
+.session-drawer__log-time {
+  color: var(--cc-on-surface-variant);
+  flex-shrink: 0;
+  opacity: 0.7;
+}
+
+.session-drawer__log-level {
+  width: 48px;
+  flex-shrink: 0;
+  font-weight: 600;
+  font-size: 11px;
+  letter-spacing: 0.02em;
+}
+
+.session-drawer__log-message {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  color: inherit;
+}
+
+// ---------------------------------------------------------------------------
+// Empty State
+// ---------------------------------------------------------------------------
+.session-drawer__empty-state {
+  font-size: 13px;
+  color: var(--cc-on-surface-variant);
+  text-align: center;
+  padding: 16px 0;
+  margin: 0;
+}
+
+// ---------------------------------------------------------------------------
+// Action Buttons — Sticky Footer
+// ---------------------------------------------------------------------------
+.session-drawer__actions {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 16px 24px 20px;
+  border-top: 1px solid var(--cc-outline);
+  background-color: var(--cc-surface-container);
+  flex-shrink: 0;
+}
+
+.session-drawer__action-btn {
+  display: inline-flex;
+  align-items: center;
+  gap: 8px;
+  font-weight: 500;
+
+  .mat-icon {
+    width: 18px;
+    height: 18px;
+    font-size: 18px;
+  }
+
+  &--primary {
+    flex: 1;
+  }
+
+  &--secondary {
+    flex-shrink: 0;
+  }
+
+  &:focus-visible {
+    outline: 2px solid var(--color-primary);
+    outline-offset: 2px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Mobile Adjustments
+// ---------------------------------------------------------------------------
+.session-drawer--mobile {
+  .session-drawer__header {
+    padding: 12px 20px 12px;
+  }
+
+  .session-drawer__content {
+    padding: 0 20px 12px;
+  }
+
+  .session-drawer__actions {
+    padding: 12px 20px 16px;
+    flex-direction: column;
+
+    .session-drawer__action-btn {
+      width: 100%;
+      justify-content: center;
+    }
+  }
+
+  .session-drawer__log-container {
+    max-height: 200px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Responsive — wider viewports keep 480px, narrow go full-width
+// ---------------------------------------------------------------------------
+@media (max-width: 599px) {
+  .session-drawer:not(.session-drawer--mobile) {
+    width: 100%;
+    max-width: 100vw;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Accessibility: Reduced Motion
+// ---------------------------------------------------------------------------
+@media (prefers-reduced-motion: reduce) {
+  .session-drawer {
+    transition: none;
+  }
+
+  .session-drawer-backdrop {
+    transition: none;
+  }
+}

frontend/src/app/components/agent-session-drawer/agent-session-drawer.component.ts

@@ -0,0 +1,268 @@
+import {
+  ChangeDetectionStrategy,
+  Component,
+  ElementRef,
+  EventEmitter,
+  HostListener,
+  Input,
+  OnDestroy,
+  Output,
+  signal,
+  ViewChild,
+} from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { MatButtonModule } from '@angular/material/button';
+import { MatIconModule } from '@angular/material/icon';
+import { MatChipsModule } from '@angular/material/chips';
+import { AgentCardData, AgentStatus } from '../../models/agent.model';
+
+// ============================================================================
+// Agent Session Drawer — Per CUB-26
+// Desktop: 480px side drawer slides from right with modal overlay.
+// Mobile: Bottom sheet slides up from bottom.
+// Shows: Agent name, status badge, session key, live log tail,
+//         recent messages, and action buttons.
+// ============================================================================
+
+export interface SessionLogLine {
+  timestamp: Date;
+  level: 'info' | 'warn' | 'error' | 'debug';
+  message: string;
+}
+
+export interface SessionMessage {
+  id: string;
+  sender: 'agent' | 'user';
+  content: string;
+  timestamp: Date;
+}
+
+@Component({
+  selector: 'app-agent-session-drawer',
+  standalone: true,
+  imports: [CommonModule, MatButtonModule, MatIconModule, MatChipsModule],
+  templateUrl: './agent-session-drawer.component.html',
+  styleUrl: './agent-session-drawer.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class AgentSessionDrawerComponent implements OnDestroy {
+  // ---------------------------------------------------------------------------
+  // Inputs
+  // ---------------------------------------------------------------------------
+
+  /** The agent whose session details are displayed. */
+  @Input() set agent(value: AgentCardData | null) {
+    this._agent = value;
+    if (value) {
+      this.isOpen.set(true);
+      this.loadSessionData(value);
+    }
+  }
+  get agent(): AgentCardData | null {
+    return this._agent;
+  }
+  private _agent: AgentCardData | null = null;
+
+  /** Whether this is mobile viewport (bottom sheet mode). */
+  @Input() isMobile = false;
+
+  // ---------------------------------------------------------------------------
+  // Outputs
+  // ---------------------------------------------------------------------------
+
+  /** Emitted when the user clicks "Open Full Session". Payload is the session key. */
+  @Output() readonly openSession = new EventEmitter<string>();
+
+  /** Emitted when the user clicks "Pin to Dashboard". Payload is the session key. */
+  @Output() readonly pinToDashboard = new EventEmitter<string>();
+
+  /** Emitted when the drawer closes. */
+  @Output() readonly drawerClose = new EventEmitter<void>();
+
+  // ---------------------------------------------------------------------------
+  // Signals
+  // ---------------------------------------------------------------------------
+
+  readonly isOpen = signal(false);
+  readonly logLines = signal<SessionLogLine[]>([]);
+  readonly recentMessages = signal<SessionMessage[]>([]);
+
+  // ---------------------------------------------------------------------------
+  // View Children
+  // ---------------------------------------------------------------------------
+
+  @ViewChild('drawerPanel') drawerPanel!: ElementRef<HTMLElement>;
+
+  // ---------------------------------------------------------------------------
+  // Status Helpers
+  // ---------------------------------------------------------------------------
+
+  getStatusClass(status: string): string {
+    return `status-dot--${status}`;
+  }
+
+  getStatusLabel(status: AgentStatus): string {
+    const labels: Record<AgentStatus, string> = {
+      active: 'Active',
+      idle: 'Idle',
+      thinking: 'Thinking…',
+      error: 'Error',
+      offline: 'Offline',
+    };
+    return labels[status] ?? status;
+  }
+
+  getStatusChipColor(status: AgentStatus): string {
+    const map: Record<AgentStatus, string> = {
+      active: 'status-chip--active',
+      idle: 'status-chip--idle',
+      thinking: 'status-chip--thinking',
+      error: 'status-chip--error',
+      offline: 'status-chip--offline',
+    };
+    return map[status] ?? '';
+  }
+
+  getLogLevelClass(level: SessionLogLine['level']): string {
+    return `log-line--${level}`;
+  }
+
+  /** Format a date to a short time string. */
+  formatTime(date: Date): string {
+    return date.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit', second: '2-digit' });
+  }
+
+  /** Format a date to a relative time string. */
+  formatRelativeTime(date: Date): string {
+    const now = Date.now();
+    const then = date.getTime();
+    const diffSec = Math.max(0, Math.floor((now - then) / 1000));
+    if (diffSec < 60) return 'just now';
+    if (diffSec < 3600) return `${Math.floor(diffSec / 60)}m ago`;
+    if (diffSec < 86400) return `${Math.floor(diffSec / 3600)}h ago`;
+    return `${Math.floor(diffSec / 86400)}d ago`;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Public API
+  // ---------------------------------------------------------------------------
+
+  /** Open the drawer for a specific agent. */
+  open(agentData: AgentCardData): void {
+    this._agent = agentData;
+    this.isOpen.set(true);
+    this.loadSessionData(agentData);
+  }
+
+  /** Close the drawer. */
+  close(): void {
+    this.isOpen.set(false);
+    this.drawerClose.emit();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Keyboard Handling
+  // ---------------------------------------------------------------------------
+
+  @HostListener('document:keydown.escape')
+  onEscapeKey(): void {
+    if (this.isOpen()) {
+      this.close();
+    }
+  }
+
+  /** Handle keyboard navigation within the drawer. */
+  onDrawerKeydown(event: KeyboardEvent): void {
+    if (event.key === 'Escape') {
+      this.close();
+      return;
+    }
+    // Tab through actions — browser default Tab behavior is fine,
+    // we just trap focus within the drawer
+  }
+
+  // ---------------------------------------------------------------------------
+  // Outside Click
+  // ---------------------------------------------------------------------------
+
+  onBackdropClick(): void {
+    this.close();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Actions
+  // ---------------------------------------------------------------------------
+
+  onOpenSession(): void {
+    if (this._agent) {
+      this.openSession.emit(this._agent.sessionKey);
+    }
+    this.close();
+  }
+
+  onPinToDashboard(): void {
+    if (this._agent) {
+      this.pinToDashboard.emit(this._agent.sessionKey);
+    }
+    // Don't close — user may want to keep viewing
+  }
+
+  // ---------------------------------------------------------------------------
+  // Lifecycle
+  // ---------------------------------------------------------------------------
+
+  ngOnDestroy(): void {
+    // Clean up any subscriptions when needed
+  }
+
+  // ---------------------------------------------------------------------------
+  // Private
+  // ---------------------------------------------------------------------------
+
+  /** Load mock session data for the agent (TODO: wire to real data service). */
+  private loadSessionData(agentData: AgentCardData): void {
+    // TODO: Replace with real session data service when available.
+    // For now, generate placeholder log lines and messages.
+    const now = new Date();
+    const logLines: SessionLogLine[] = [];
+    for (let i = 19; i >= 0; i--) {
+      const ts = new Date(now.getTime() - i * 5000);
+      const levels: SessionLogLine['level'][] = ['info', 'info', 'info', 'debug', 'warn'];
+      const messages = [
+        `Processing task queue for ${agentData.displayName}`,
+        `SignalR heartbeat OK`,
+        `Session state: active`,
+        `Checking for pending commands…`,
+        `Updating task progress: ${Math.floor(Math.random() * 100)}%`,
+      ];
+      logLines.push({
+        timestamp: ts,
+        level: levels[i % levels.length],
+        message: messages[i % messages.length],
+      });
+    }
+    this.logLines.set(logLines);
+
+    const recentMessages: SessionMessage[] = [
+      {
+        id: '1',
+        sender: 'user',
+        content: `Hey ${agentData.displayName}, how's the current task going?`,
+        timestamp: new Date(now.getTime() - 120000),
+      },
+      {
+        id: '2',
+        sender: 'agent',
+        content: agentData.currentTask ?? 'Working on it — progress is steady.',
+        timestamp: new Date(now.getTime() - 115000),
+      },
+      {
+        id: '3',
+        sender: 'user',
+        content: 'Great, let me know if you hit any blockers.',
+        timestamp: new Date(now.getTime() - 110000),
+      },
+    ];
+    this.recentMessages.set(recentMessages);
+  }
+}

frontend/src/app/components/agent-session-drawer/index.ts

@@ -0,0 +1,2 @@
+export { AgentSessionDrawerComponent } from './agent-session-drawer.component';
+export type { SessionLogLine, SessionMessage } from './agent-session-drawer.component';

frontend/src/app/components/index.ts

@@ -1 +1,5 @@
+export * from './quick-jump-button/quick-jump-button.component';
 export { AgentStatusBadgeComponent } from './agent-status-badge/agent-status-badge.component';
+export { QuickJumpDrawerComponent } from './quick-jump-drawer/index';
+export { AgentSessionDrawerComponent } from './agent-session-drawer/index';
+export type { SessionLogLine, SessionMessage } from './agent-session-drawer/index';

frontend/src/app/components/quick-jump-button/quick-jump-button.component.html

@@ -0,0 +1,8 @@
+<button
+  mat-icon-button
+  class="quick-jump-button"
+  [attr.aria-label]="'Jump to agent session'"
+  (click)="onJumpClick()"
+>
+  <mat-icon>arrow_forward</mat-icon>
+</button>

frontend/src/app/components/quick-jump-button/quick-jump-button.component.scss

@@ -0,0 +1,68 @@
+// ============================================================================
+// Quick-Jump Button — M3 FilledTonalIconButton
+// Per spec Section 7.3: Agent Card Quick-Jump action
+// M3 spec: FilledTonalIconButton uses secondary container color
+// with 8% state layer overlay for hover/focus.
+// ============================================================================
+
+.quick-jump-button {
+  // M3 FilledTonalIconButton: secondary-container background
+  // Angular Material mat-icon-button sets up the base shape (40x40, round).
+  // We override the color tokens to match FilledTonal style.
+  --mdc-icon-button-icon-color: var(--mat-sys-on-secondary-container);
+  background-color: var(--mat-sys-secondary-container);
+  border-radius: 50%;
+  transition: background-color 150ms cubic-bezier(0.4, 0, 0.2, 1);
+
+  // M3 State Layer: 8% overlay on hover
+  &:hover {
+    background-color: var(--mat-sys-secondary-container);
+    // State layer overlay using a pseudo-element for precise 8% opacity
+    &::after {
+      content: '';
+      position: absolute;
+      inset: 0;
+      border-radius: 50%;
+      background-color: var(--mat-sys-on-secondary-container);
+      opacity: 0.08;
+      pointer-events: none;
+    }
+  }
+
+  // M3 State Layer: 12% overlay on focus-visible (slightly stronger for accessibility)
+  &:focus-visible {
+    background-color: var(--mat-sys-secondary-container);
+    outline: 3px solid var(--status-active);
+    outline-offset: 2px;
+
+    &::after {
+      content: '';
+      position: absolute;
+      inset: 0;
+      border-radius: 50%;
+      background-color: var(--mat-sys-on-secondary-container);
+      opacity: 0.12;
+      pointer-events: none;
+    }
+  }
+
+  // M3 State Layer: 12% overlay on active/pressed
+  &:active {
+    background-color: var(--mat-sys-secondary-container);
+
+    &::after {
+      content: '';
+      position: absolute;
+      inset: 0;
+      border-radius: 50%;
+      background-color: var(--mat-sys-on-secondary-container);
+      opacity: 0.12;
+      pointer-events: none;
+    }
+  }
+
+  // Icon color stays on-secondary-container across all states
+  .mat-icon {
+    color: var(--mat-sys-on-secondary-container);
+  }
+}

frontend/src/app/components/quick-jump-button/quick-jump-button.component.ts

@@ -0,0 +1,32 @@
+import { ChangeDetectionStrategy, Component, EventEmitter, Output } from '@angular/core';
+import { MatIconButton } from '@angular/material/button';
+import { MatIcon } from '@angular/material/icon';
+
+/**
+ * Quick-Jump Button — M3 FilledTonalIconButton
+ *
+ * An icon button that emits a navigation event for jumping to an agent session.
+ * Uses the Material Design 3 FilledTonalIconButton style with 8% state layer
+ * overlay on hover and focus.
+ *
+ * Per spec Section 7.3: Agent Card Component Interface
+ */
+@Component({
+  selector: 'app-quick-jump-button',
+  standalone: true,
+  imports: [MatIconButton, MatIcon],
+  templateUrl: './quick-jump-button.component.html',
+  styleUrl: './quick-jump-button.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class QuickJumpButtonComponent {
+  /** Emitted when the button is clicked, carrying the session key for navigation. */
+  @Output() jumpClick = new EventEmitter<string>();
+
+  /** The session key to navigate to. Set by the parent agent card. */
+  sessionKey = '';
+
+  onJumpClick(): void {
+    this.jumpClick.emit(this.sessionKey);
+  }
+}

frontend/src/app/components/quick-jump-drawer/index.ts

@@ -0,0 +1 @@
+export { QuickJumpDrawerComponent } from './quick-jump-drawer.component';

frontend/src/app/components/quick-jump-drawer/quick-jump-drawer.component.html

@@ -0,0 +1,109 @@
+<!-- ============================================================================
+  Quick-Jump Drawer — Slide-out panel for fast agent switching
+  Per CUB-51: Slides from right, agent list with status badges,
+  search/filter input, closes via ESC or outside click.
+  ============================================================================-->
+
+<!-- Backdrop overlay -->
+@if (isOpen()) {
+  <div
+    class="quick-jump-backdrop"
+    (click)="onBackdropClick($event)"
+    [@backdropEnter]
+  ></div>
+}
+
+<!-- Drawer panel -->
+<div
+  class="quick-jump-drawer"
+  [class.quick-jump-drawer--open]="isOpen()"
+  (keydown)="onDrawerKeydown($event)"
+  role="dialog"
+  aria-label="Quick jump to agent"
+  [attr.aria-hidden]="!isOpen()"
+>
+  <!-- Drawer header -->
+  <div class="quick-jump-drawer__header">
+    <h2 class="quick-jump-drawer__title">Jump to Agent</h2>
+    <button
+      class="quick-jump-drawer__close-btn"
+      type="button"
+      aria-label="Close drawer"
+      (click)="close()"
+    >
+      ✕
+    </button>
+  </div>
+
+  <!-- Search input -->
+  <div class="quick-jump-drawer__search">
+    <span class="quick-jump-drawer__search-icon">search</span>
+    <input
+      #searchInput
+      type="text"
+      class="quick-jump-drawer__search-input"
+      placeholder="Search agents..."
+      [formControl]="searchControl"
+      autocomplete="off"
+      aria-label="Search agents"
+    />
+    @if (searchControl.value) {
+      <button
+        class="quick-jump-drawer__search-clear"
+        type="button"
+        aria-label="Clear search"
+        (click)="searchControl.setValue('')"
+      >
+        ✕
+      </button>
+    }
+  </div>
+
+  <!-- Agent list -->
+  <ul class="quick-jump-drawer__agent-list" role="listbox" aria-label="Agent list">
+    @for (agent of filteredAgents(); track agent.id; let i = $index) {
+      <li
+        [id]="'quick-jump-agent-' + i"
+        class="quick-jump-drawer__agent-item"
+        [class.quick-jump-drawer__agent-item--highlighted]="highlightedIndex() === i"
+        role="option"
+        [attr.aria-selected]="highlightedIndex() === i"
+        (click)="selectAgent(agent)"
+        (mouseenter)="highlightedIndex.set(i)"
+        (mouseleave)="highlightedIndex.set(-1)"
+      >
+        <!-- Status badge -->
+        <span
+          class="status-dot {{ getStatusClass(agent.status) }}"
+          [attr.aria-label]="getStatusLabel(agent.status)"
+        ></span>
+
+        <!-- Agent info -->
+        <div class="quick-jump-drawer__agent-info">
+          <span class="quick-jump-drawer__agent-name">{{ agent.displayName }}</span>
+          <span class="quick-jump-drawer__agent-role">{{ agent.role }}</span>
+        </div>
+
+        <!-- Status label -->
+        <span class="quick-jump-drawer__agent-status-label" [class]="'status-label--' + agent.status">
+          {{ getStatusLabel(agent.status) }}
+        </span>
+      </li>
+    } @empty {
+      <li class="quick-jump-drawer__empty">
+        @if (searchControl.value) {
+          <span>No agents matching "{{ searchControl.value }}"</span>
+        } @else {
+          <span>No agents online</span>
+        }
+      </li>
+    }
+  </ul>
+
+  <!-- Footer hint -->
+  <div class="quick-jump-drawer__footer">
+    <span class="quick-jump-drawer__footer-hint">
+      <kbd>↑↓</kbd> Navigate &nbsp; <kbd>↵</kbd> Select &nbsp; <kbd>Esc</kbd> Close
+    </span>
+  </div>
+</div>

frontend/src/app/components/quick-jump-drawer/quick-jump-drawer.component.scss

@@ -0,0 +1,333 @@
+// ============================================================================
+// Quick-Jump Drawer — Slide-out panel for fast agent switching
+// Per CUB-51: slides from right, agent list with status badges,
+// search/filter input, closes via ESC or outside click.
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// Backdrop
+// ---------------------------------------------------------------------------
+.quick-jump-backdrop {
+  position: fixed;
+  inset: 0;
+  background-color: rgba(0, 0, 0, 0.5);
+  z-index: 998;
+  opacity: 0;
+  transition: opacity 200ms ease-out;
+
+  &.backdrop-visible {
+    opacity: 1;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Drawer Panel
+// ---------------------------------------------------------------------------
+.quick-jump-drawer {
+  position: fixed;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  width: 380px;
+  max-width: 90vw;
+  background-color: var(--cc-surface-container);
+  border-left: 1px solid var(--cc-outline);
+  z-index: 999;
+  display: flex;
+  flex-direction: column;
+  transform: translateX(100%);
+  transition: transform 250ms cubic-bezier(0.4, 0, 0.2, 1);
+  box-shadow: -4px 0 24px rgba(0, 0, 0, 0.3);
+
+  &--open {
+    transform: translateX(0);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Header
+// ---------------------------------------------------------------------------
+.quick-jump-drawer__header {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 20px 24px 12px;
+  border-bottom: 1px solid var(--cc-outline);
+}
+
+.quick-jump-drawer__title {
+  font-size: 20px;
+  font-weight: 500;
+  color: var(--cc-on-surface);
+  margin: 0;
+  letter-spacing: -0.01em;
+}
+
+.quick-jump-drawer__close-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 36px;
+  height: 36px;
+  border: none;
+  border-radius: 8px;
+  background: transparent;
+  color: var(--cc-on-surface-variant);
+  font-size: 18px;
+  cursor: pointer;
+  transition: background-color 150ms ease, color 150ms ease;
+
+  &:hover {
+    background-color: var(--cc-surface-container-high);
+    color: var(--cc-on-surface);
+  }
+
+  &:focus-visible {
+    outline: 2px solid var(--status-active);
+    outline-offset: 2px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Search
+// ---------------------------------------------------------------------------
+.quick-jump-drawer__search {
+  position: relative;
+  display: flex;
+  align-items: center;
+  margin: 16px 24px 8px;
+  border: 1px solid var(--cc-outline);
+  border-radius: 12px;
+  background-color: var(--cc-surface-container-high);
+  transition: border-color 150ms ease;
+
+  &:focus-within {
+    border-color: var(--status-active);
+  }
+}
+
+.quick-jump-drawer__search-icon {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding-left: 12px;
+  font-family: 'Material Icons';
+  font-size: 20px;
+  color: var(--cc-on-surface-variant);
+  pointer-events: none;
+  user-select: none;
+
+  // Use a simple "search" text since icon font may not be loaded inside
+  // the drawer — rely on Material icon font from the parent app
+  &::before {
+    content: 'search';
+    font-family: 'Material Icons';
+  }
+}
+
+.quick-jump-drawer__search-input {
+  flex: 1;
+  border: none;
+  outline: none;
+  background: transparent;
+  padding: 12px 8px;
+  font-size: 15px;
+  font-family: 'Inter', 'Roboto', sans-serif;
+  color: var(--cc-on-surface);
+
+  &::placeholder {
+    color: var(--cc-on-surface-variant);
+    opacity: 0.7;
+  }
+}
+
+.quick-jump-drawer__search-clear {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 32px;
+  height: 32px;
+  margin-right: 4px;
+  border: none;
+  border-radius: 8px;
+  background: transparent;
+  color: var(--cc-on-surface-variant);
+  font-size: 14px;
+  cursor: pointer;
+  transition: background-color 150ms ease, color 150ms ease;
+
+  &:hover {
+    background-color: var(--cc-surface-container);
+    color: var(--cc-on-surface);
+  }
+
+  &:focus-visible {
+    outline: 2px solid var(--status-active);
+    outline-offset: 2px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Agent List
+// ---------------------------------------------------------------------------
+.quick-jump-drawer__agent-list {
+  list-style: none;
+  margin: 0;
+  padding: 8px 12px;
+  overflow-y: auto;
+  flex: 1;
+}
+
+.quick-jump-drawer__agent-item {
+  display: flex;
+  align-items: center;
+  gap: 12px;
+  padding: 12px;
+  border-radius: 12px;
+  cursor: pointer;
+  transition: background-color 150ms ease;
+
+  &:hover,
+  &--highlighted {
+    background-color: var(--cc-surface-container-high);
+  }
+
+  &--highlighted {
+    outline: 2px solid var(--status-active);
+    outline-offset: -2px;
+  }
+
+  &:focus-visible {
+    outline: 2px solid var(--status-active);
+    outline-offset: 2px;
+  }
+}
+
+.quick-jump-drawer__agent-info {
+  display: flex;
+  flex-direction: column;
+  gap: 2px;
+  min-width: 0; // Allow text truncation
+  flex: 1;
+}
+
+.quick-jump-drawer__agent-name {
+  font-size: 15px;
+  font-weight: 500;
+  color: var(--cc-on-surface);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.quick-jump-drawer__agent-role {
+  font-size: 12px;
+  color: var(--cc-on-surface-variant);
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
+}
+
+.quick-jump-drawer__agent-status-label {
+  font-size: 11px;
+  font-weight: 500;
+  text-transform: uppercase;
+  letter-spacing: 0.05em;
+  padding: 3px 8px;
+  border-radius: 6px;
+  white-space: nowrap;
+
+  &.status-label--active {
+    color: var(--status-active);
+    background-color: var(--status-active-bg);
+  }
+
+  &.status-label--idle {
+    color: var(--status-idle);
+    background-color: var(--status-idle-bg);
+  }
+
+  &.status-label--thinking {
+    color: var(--status-thinking);
+    background-color: var(--status-thinking-bg);
+  }
+
+  &.status-label--error {
+    color: var(--status-error);
+    background-color: var(--status-error-bg);
+  }
+
+  &.status-label--offline {
+    color: var(--status-offline);
+    background-color: rgba(100, 116, 139, 0.12);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Empty State
+// ---------------------------------------------------------------------------
+.quick-jump-drawer__empty {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 48px 24px;
+  color: var(--cc-on-surface-variant);
+  font-size: 14px;
+  text-align: center;
+}
+
+// ---------------------------------------------------------------------------
+// Footer
+// ---------------------------------------------------------------------------
+.quick-jump-drawer__footer {
+  padding: 12px 24px 16px;
+  border-top: 1px solid var(--cc-outline);
+}
+
+.quick-jump-drawer__footer-hint {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: 4px;
+  font-size: 11px;
+  color: var(--cc-on-surface-variant);
+  opacity: 0.7;
+
+  kbd {
+    display: inline-block;
+    padding: 2px 6px;
+    font-size: 11px;
+    font-family: var(--cc-font-mono);
+    background-color: var(--cc-surface-container-high);
+    border: 1px solid var(--cc-outline);
+    border-radius: 4px;
+    color: var(--cc-on-surface-variant);
+    line-height: 1.4;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Mobile Adjustments
+// ---------------------------------------------------------------------------
+@media (max-width: 599px) {
+  .quick-jump-drawer {
+    width: 100%;
+    max-width: 100vw;
+  }
+
+  .quick-jump-drawer__header {
+    padding: 16px 16px 10px;
+  }
+
+  .quick-jump-drawer__search {
+    margin: 12px 16px 8px;
+  }
+
+  .quick-jump-drawer__agent-list {
+    padding: 4px 8px;
+  }
+
+  .quick-jump-drawer__footer {
+    padding: 10px 16px 14px;
+  }
+}

frontend/src/app/components/quick-jump-drawer/quick-jump-drawer.component.ts

@@ -0,0 +1,215 @@
+import {
+  ChangeDetectionStrategy,
+  Component,
+  ElementRef,
+  EventEmitter,
+  HostListener,
+  OnDestroy,
+  Output,
+  signal,
+  ViewChild,
+} from '@angular/core';
+import { FormControl, ReactiveFormsModule } from '@angular/forms';
+import { Subject, takeUntil } from 'rxjs';
+import { AgentCardData } from '../../models/agent.model';
+import { AgentStatusService } from '../../services/agent-status.service';
+
+@Component({
+  selector: 'app-quick-jump-drawer',
+  standalone: true,
+  imports: [ReactiveFormsModule],
+  templateUrl: './quick-jump-drawer.component.html',
+  styleUrl: './quick-jump-drawer.component.scss',
+  changeDetection: ChangeDetectionStrategy.OnPush,
+})
+export class QuickJumpDrawerComponent implements OnDestroy {
+  /** Emits when the drawer should close (ESC, outside click, or item select). */
+  @Output() readonly drawerClose = new EventEmitter<void>();
+
+  /** Whether the drawer is visible. */
+  readonly isOpen = signal(false);
+
+  /** Search/filter input control. */
+  readonly searchControl = new FormControl('', { nonNullable: true });
+
+  /** Filtered agent list based on search. */
+  readonly filteredAgents = signal<AgentCardData[]>([]);
+
+  /** Track which agent row is highlighted via keyboard navigation. */
+  readonly highlightedIndex = signal(-1);
+
+  @ViewChild('searchInput') searchInput!: ElementRef<HTMLInputElement>;
+  @ViewChild('drawerPanel') drawerPanel!: ElementRef<HTMLElement>;
+
+  private readonly destroy$ = new Subject<void>();
+
+  constructor(private readonly agentStatusService: AgentStatusService) {
+    // Reactively filter agents as the search input changes
+    this.searchControl.valueChanges
+      .pipe(takeUntil(this.destroy$))
+      .subscribe((query) => this.filterAgents(query));
+
+    // Initial load
+    this.filterAgents('');
+  }
+
+  // ---------------------------------------------------------------------------
+  // Public API
+  // ---------------------------------------------------------------------------
+
+  /** Open the drawer and focus the search input. */
+  open(): void {
+    this.isOpen.set(true);
+    this.searchControl.setValue('', { emitEvent: false });
+    this.highlightedIndex.set(-1);
+    // Focus search input after animation frame (drawer needs to render first)
+    requestAnimationFrame(() => {
+      this.searchInput?.nativeElement?.focus();
+    });
+  }
+
+  /** Close the drawer. */
+  close(): void {
+    this.isOpen.set(false);
+    this.searchControl.setValue('', { emitEvent: false });
+    this.highlightedIndex.set(-1);
+    this.drawerClose.emit();
+  }
+
+  /** Toggle the drawer open/close. */
+  toggle(): void {
+    if (this.isOpen()) {
+      this.close();
+    } else {
+      this.open();
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Keyboard Handling
+  // ---------------------------------------------------------------------------
+
+  @HostListener('document:keydown.escape')
+  onEscapeKey(): void {
+    if (this.isOpen()) {
+      this.close();
+    }
+  }
+
+  /** Handle keyboard navigation within the drawer panel. */
+  onDrawerKeydown(event: KeyboardEvent): void {
+    const agents = this.filteredAgents();
+    if (!agents.length) return;
+
+    switch (event.key) {
+      case 'ArrowDown': {
+        event.preventDefault();
+        this.highlightedIndex.update((i) =>
+          i < agents.length - 1 ? i + 1 : 0
+        );
+        this.scrollIntoView();
+        break;
+      }
+      case 'ArrowUp': {
+        event.preventDefault();
+        this.highlightedIndex.update((i) =>
+          i > 0 ? i - 1 : agents.length - 1
+        );
+        this.scrollIntoView();
+        break;
+      }
+      case 'Enter': {
+        const idx = this.highlightedIndex();
+        if (idx >= 0 && idx < agents.length) {
+          this.selectAgent(agents[idx]);
+        }
+        break;
+      }
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Outside Click
+  // ---------------------------------------------------------------------------
+
+  /** Close when clicking on the backdrop (outside the panel). */
+  onBackdropClick(event: MouseEvent): void {
+    if (
+      this.drawerPanel?.nativeElement &&
+      !this.drawerPanel.nativeElement.contains(event.target as Node)
+    ) {
+      this.close();
+    }
+  }
+
+  // ---------------------------------------------------------------------------
+  // Agent Selection
+  // ---------------------------------------------------------------------------
+
+  /** Select an agent — navigates or focuses the agent card. */
+  selectAgent(agent: AgentCardData): void {
+    // TODO: Wire up navigation to the selected agent's detail view
+    // For now, emit close after selection
+    console.log('[QuickJump] Selected agent:', agent.id);
+    this.close();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Status Helpers
+  // ---------------------------------------------------------------------------
+
+  /** Get the CSS class for a given agent status. */
+  getStatusClass(status: string): string {
+    return `status-dot--${status}`;
+  }
+
+  /** Get a human-readable label for an agent status. */
+  getStatusLabel(status: string): string {
+    const labels: Record<string, string> = {
+      active: 'Active',
+      idle: 'Idle',
+      thinking: 'Thinking',
+      error: 'Error',
+      offline: 'Offline',
+    };
+    return labels[status] ?? status;
+  }
+
+  // ---------------------------------------------------------------------------
+  // Lifecycle
+  // ---------------------------------------------------------------------------
+
+  ngOnDestroy(): void {
+    this.destroy$.next();
+    this.destroy$.complete();
+  }
+
+  // ---------------------------------------------------------------------------
+  // Private
+  // ---------------------------------------------------------------------------
+
+  private filterAgents(query: string): void {
+    const allAgents = this.agentStatusService.agents();
+    const lowerQuery = query.toLowerCase().trim();
+
+    if (!lowerQuery) {
+      this.filteredAgents.set(allAgents);
+      return;
+    }
+
+    const filtered = allAgents.filter(
+      (agent) =>
+        agent.displayName.toLowerCase().includes(lowerQuery) ||
+        agent.id.toLowerCase().includes(lowerQuery) ||
+        agent.role.toLowerCase().includes(lowerQuery)
+    );
+    this.filteredAgents.set(filtered);
+    this.highlightedIndex.set(-1);
+  }
+
+  private scrollIntoView(): void {
+    const idx = this.highlightedIndex();
+    const el = document.getElementById(`quick-jump-agent-${idx}`);
+    el?.scrollIntoView({ block: 'nearest', behavior: 'smooth' });
+  }
+}

frontend/src/app/design/index.ts

@@ -0,0 +1,11 @@
+// ============================================================================
+// OpenClaw Control Center — Design System Barrel Export
+// ============================================================================
+// Import everything from '@app/design' for convenient access.
+//
+// Usage:
+//   import { CcTokens, CcThemeService, CcCssProps } from '@app/design';
+// ============================================================================
+
+export * from './tokens';
+export * from './theme.service';

frontend/src/app/design/theme.service.ts

@@ -0,0 +1,151 @@
+// ============================================================================
+// OpenClaw Control Center — Theme Service
+// ============================================================================
+// Angular service providing programmatic access to design tokens, theme
+// mode switching (dark/light), and runtime CSS custom property manipulation.
+//
+// Usage:
+//   constructor(private theme: CcThemeService) {}
+//
+//   // Read a token
+//   const primary = this.theme.getToken('--cc-color-primary');
+//
+//   // Set a token at runtime
+//   this.theme.setToken('--cc-color-primary', '#00ff00');
+//
+//   // Toggle theme
+//   this.theme.setMode('light');
+// ============================================================================
+
+import { Injectable, signal, computed, effect } from '@angular/core';
+import { CcCssProps, getStatusColor, setCssToken, getCssToken } from './tokens';
+
+// ---------------------------------------------------------------------------
+// Theme Mode Types
+// ---------------------------------------------------------------------------
+export type ThemeMode = 'dark' | 'light';
+
+// ---------------------------------------------------------------------------
+// Light theme overrides (future use)
+// ---------------------------------------------------------------------------
+const LIGHT_THEME_OVERRIDES: Record<string, string> = {
+  // Surface tokens
+  '--cc-surface-darkest':     '#F8FAFC',
+  '--cc-surface-dark':        '#FFFFFF',
+  '--cc-surface-medium':      '#F1F5F9',
+  '--cc-surface-light':       '#E2E8F0',
+  '--cc-surface-lighter':     '#CBD5E1',
+
+  // On-surface tokens
+  '--cc-on-surface':          '#0F172A',
+  '--cc-on-surface-variant':  '#475569',
+  '--cc-on-surface-muted':    '#94A3B8',
+
+  // Border
+  '--cc-surface-lighter-alt': '#E2E8F0',
+
+  // M3 system overrides for light
+  '--mat-sys-surface':                '#FFFFFF',
+  '--mat-sys-surface-container':      '#F1F5F9',
+  '--mat-sys-surface-container-high': '#E2E8F0',
+  '--mat-sys-on-surface':            '#0F172A',
+  '--mat-sys-on-surface-variant':    '#475569',
+  '--mat-sys-outline':               '#CBD5E1',
+  '--mat-sys-background':            '#F8FAFC',
+};
+
+// ---------------------------------------------------------------------------
+// Dark theme (matches the SCSS defaults)
+// ---------------------------------------------------------------------------
+const DARK_THEME_OVERRIDES: Record<string, string> = {
+  '--cc-surface-darkest':     '#0D0F12',
+  '--cc-surface-dark':        '#13161A',
+  '--cc-surface-medium':      '#1C2027',
+  '--cc-surface-light':       '#252B33',
+  '--cc-surface-lighter':     '#2D3748',
+
+  '--cc-on-surface':          '#E2E8F0',
+  '--cc-on-surface-variant':  '#8A9BB0',
+  '--cc-on-surface-muted':    '#64748B',
+
+  '--mat-sys-surface':                '#13161A',
+  '--mat-sys-surface-container':      '#1C2027',
+  '--mat-sys-surface-container-high': '#252B33',
+  '--mat-sys-on-surface':            '#E2E8F0',
+  '--mat-sys-on-surface-variant':    '#8A9BB0',
+  '--mat-sys-outline':               '#2D3748',
+  '--mat-sys-background':            '#0D0F12',
+};
+
+@Injectable({ providedIn: 'root' })
+export class CcThemeService {
+  // ---------------------------------------------------------------------------
+  // Signals for reactive theme state
+  // ---------------------------------------------------------------------------
+  private readonly _mode = signal<ThemeMode>(
+    (localStorage.getItem('cc-theme') as ThemeMode) ?? 'dark'
+  );
+
+  /** Current theme mode */
+  readonly mode = this._mode.asReadonly();
+
+  /** Computed: is the current mode dark? */
+  readonly isDark = computed(() => this._mode() === 'dark');
+
+  /** Computed: is the current mode light? */
+  readonly isLight = computed(() => this._mode() === 'light');
+
+  constructor() {
+    // Apply theme on init and whenever mode changes
+    effect(() => {
+      this.applyTheme(this._mode());
+    });
+  }
+
+  // ---------------------------------------------------------------------------
+  // Public API
+  // ---------------------------------------------------------------------------
+
+  /** Set the theme mode and persist to localStorage */
+  setMode(mode: ThemeMode): void {
+    this._mode.set(mode);
+    localStorage.setItem('cc-theme', mode);
+  }
+
+  /** Toggle between dark and light mode */
+  toggle(): void {
+    this.setMode(this._mode() === 'dark' ? 'light' : 'dark');
+  }
+
+  /** Read a CSS custom property from the document root */
+  getToken(property: string): string {
+    return getCssToken(property);
+  }
+
+  /** Set a CSS custom property on the document root */
+  setToken(property: string, value: string): void {
+    setCssToken(property, value);
+  }
+
+  /** Get status color set by agent status */
+  getStatusColors(status: string): { fg: string; bg: string; border: string } {
+    return getStatusColor(status);
+  }
+
+  // ---------------------------------------------------------------------------
+  // Internal
+  // ---------------------------------------------------------------------------
+
+  /** Apply a theme mode by setting all CSS custom properties */
+  private applyTheme(mode: ThemeMode): void {
+    const overrides = mode === 'dark' ? DARK_THEME_OVERRIDES : LIGHT_THEME_OVERRIDES;
+
+    // Set color-scheme for native form controls
+    document.documentElement.style.setProperty('color-scheme', mode);
+
+    // Apply all overrides
+    for (const [prop, value] of Object.entries(overrides)) {
+      document.documentElement.style.setProperty(prop, value);
+    }
+  }
+}

frontend/src/app/design/tokens.ts

@@ -0,0 +1,462 @@
+// ============================================================================
+// OpenClaw Control Center — Design Tokens (TypeScript)
+// ============================================================================
+// Typed representation of the design system tokens for programmatic access.
+// These mirror the SCSS tokens in styles/_tokens.scss and the CSS custom
+// properties emitted by styles/_css-properties.scss.
+//
+// Usage:
+//   import { CcTokens } from '@app/design/tokens';
+//   const primary = CcTokens.color.primary;
+//   const surface = CcTokens.surface.dark;
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// Color Palette
+// ---------------------------------------------------------------------------
+export const CcColors = {
+  primary: {
+    50:  '#ecfeff',
+    100: '#cffafe',
+    200: '#a5f3fc',
+    300: '#67e8f9',
+    400: '#22d3ee',
+    500: '#38bdf8',
+    600: '#0ea5e9',
+    700: '#0284c7',
+    800: '#0369a1',
+    900: '#075985',
+  },
+  secondary: {
+    50:  '#f0fdfa',
+    100: '#ccfbf1',
+    200: '#99f6e4',
+    300: '#5eead4',
+    400: '#2dd4bf',
+    500: '#14b8a6',
+    600: '#0d9488',
+    700: '#0f766e',
+    800: '#115e59',
+    900: '#134e4a',
+  },
+  accent: {
+    50:  '#f5f3ff',
+    100: '#ede9fe',
+    200: '#ddd6fe',
+    300: '#c4b5fd',
+    400: '#a78bfa',
+    500: '#8b5cf6',
+    600: '#7c3aed',
+    700: '#6d28d9',
+    800: '#5b21b6',
+    900: '#4c1d95',
+  },
+  danger: {
+    50:  '#fef2f2',
+    100: '#fee2e2',
+    200: '#fecaca',
+    300: '#fca5a5',
+    400: '#f87171',
+    500: '#ef4444',
+    600: '#dc2626',
+    700: '#b91c1c',
+    800: '#991b1b',
+    900: '#7f1d1d',
+  },
+} as const;
+
+// ---------------------------------------------------------------------------
+// Semantic Colors (Tactical Dark)
+// ---------------------------------------------------------------------------
+export const CcSemanticColors = {
+  surface: {
+    darkest: '#0D0F12',
+    dark:    '#13161A',
+    medium:  '#1C2027',
+    light:   '#252B33',
+    lighter: '#2D3748',
+  },
+  onSurface: {
+    primary:  '#E2E8F0',
+    variant:  '#8A9BB0',
+    muted:    '#64748B',
+  },
+} as const;
+
+// ---------------------------------------------------------------------------
+// Status Colors
+// ---------------------------------------------------------------------------
+export const CcStatusColors = {
+  active:   { fg: '#38bdf8', bg: 'rgba(56, 189, 248, 0.12)',  border: 'rgba(56, 189, 248, 0.40)' },
+  idle:     { fg: '#2dd4bf', bg: 'rgba(45, 212, 191, 0.12)',  border: 'rgba(45, 212, 191, 0.40)' },
+  thinking: { fg: '#a78bfa', bg: 'rgba(167, 139, 250, 0.12)', border: 'rgba(167, 139, 250, 0.40)' },
+  error:    { fg: '#f87171', bg: 'rgba(248, 113, 113, 0.12)', border: 'rgba(248, 113, 113, 0.40)' },
+  offline:  { fg: '#64748b', bg: 'rgba(100, 116, 139, 0.12)', border: 'rgba(100, 116, 139, 0.40)' },
+} as const;
+
+// ---------------------------------------------------------------------------
+// Convenience exports for component usage (CUB-20)
+// ---------------------------------------------------------------------------
+/** Status colors — maps AgentStatus to hex values */
+export const STATUS_COLORS: Record<string, string> = {
+  active: '#38BDF8',
+  idle: '#2DD4BF',
+  thinking: '#A78BFA',
+  error: '#F87171',
+  offline: '#64748B',
+};
+
+/** Status background tints (12% opacity) */
+export const STATUS_BG_COLORS: Record<string, string> = {
+  active: 'rgba(56, 189, 248, 0.12)',
+  idle: 'rgba(45, 212, 191, 0.12)',
+  thinking: 'rgba(167, 139, 250, 0.12)',
+  error: 'rgba(248, 113, 113, 0.12)',
+  offline: 'rgba(100, 116, 139, 0.12)',
+};
+
+/** Surface overrides (CUB-20 convenience) */
+export const SURFACE = {
+  background: '#0D0F12',
+  surface: '#13161A',
+  container: '#1C2027',
+  containerHigh: '#252B33',
+  onSurface: '#E2E8F0',
+  onSurfaceVariant: '#8A9BB0',
+  outline: '#2D3748',
+} as const;
+
+/** Tactical Dark Mode color palette (CUB-20 convenience) */
+export const COLORS = {
+  surface: '#0F172A',
+  surfaceLight: '#1E293B',
+  primary: '#38BDF8',
+  secondary: '#2DD4BF',
+  accent: '#A78BFA',
+  danger: '#F87171',
+  textPrimary: '#FFFFFF',
+  textSecondary: '#94A3B8',
+  border: '#334155',
+} as const;
+
+/** Layout constants (CUB-20 convenience) */
+export const LAYOUT = {
+  navRailCollapsedWidth: 72,
+  navRailExpandedWidth: 256,
+  headerHeight: 64,
+  bottomNavHeight: 80,
+  cardBorderRadius: 16,
+  cardMinWidth: 320,
+  cardGap: 16,
+  cardPadding: 20,
+  sectionPadding: 24,
+  spacingUnit: 8,
+} as const;
+
+/** Breakpoints (px) (CUB-20 convenience) */
+export const BREAKPOINTS = {
+  mobile: 599,
+  tablet: 1023,
+  desktop: 1024,
+} as const;
+
+/** Channel icon mapping (CUB-20) */
+export const CHANNEL_ICONS: Record<string, string> = {
+  telegram: 'telegram',
+  slack: 'chat',
+  discord: 'forum',
+  whatsapp: 'chat',
+  webchat: 'language',
+  email: 'email',
+  mqtt: 'sensors',
+};
+
+/** Human-readable status labels (CUB-20) */
+export const STATUS_LABELS: Record<string, string> = {
+  active: 'Active',
+  idle: 'Idle',
+  thinking: 'Thinking…',
+  error: 'Error',
+  offline: 'Offline',
+};
+
+// ---------------------------------------------------------------------------
+// Typography
+// ---------------------------------------------------------------------------
+export const CcTypography = {
+  fontFamily: {
+    brand: "'Inter, Roboto, sans-serif'",
+    body:  "'Inter, Roboto, sans-serif'",
+    mono:  "'Roboto Mono, Cascadia Code, Fira Code, monospace'",
+  },
+  size: {
+    displayLarge:  '57px',
+    displayMedium: '45px',
+    displaySmall:  '36px',
+    headlineLarge: '32px',
+    headlineMedium: '28px',
+    headlineSmall:  '24px',
+    titleLarge:    '22px',
+    titleMedium:   '16px',
+    titleSmall:    '14px',
+    bodyLarge:     '16px',
+    bodyMedium:    '14px',
+    bodySmall:     '12px',
+    labelLarge:    '14px',
+    labelMedium:   '12px',
+    labelSmall:    '11px',
+  },
+  weight: {
+    regular: 400,
+    medium:  500,
+    bold:    600,
+    heavy:   700,
+  },
+  lineHeight: {
+    tight:   '1.2',
+    normal:  '1.5',
+    relaxed: '1.6',
+  },
+  letterSpacing: {
+    tight:  '-0.01em',
+    normal: '0em',
+    wide:   '0.02em',
+    mono:   '0.05em',
+  },
+} as const;
+
+// ---------------------------------------------------------------------------
+// Spacing (4px grid)
+// ---------------------------------------------------------------------------
+export const CcSpacing = {
+  0:  '0px',
+  1:  '4px',
+  2:  '8px',
+  3:  '12px',
+  4:  '16px',
+  5:  '20px',
+  6:  '24px',
+  7:  '28px',
+  8:  '32px',
+  9:  '36px',
+  10: '40px',
+  12: '48px',
+  14: '56px',
+  16: '64px',
+  20: '80px',
+} as const;
+
+// ---------------------------------------------------------------------------
+// Layout
+// ---------------------------------------------------------------------------
+export const CcLayout = {
+  navRailCollapsedWidth: '72px',
+  navRailExpandedWidth:  '256px',
+  headerHeight:          '64px',
+  bottomNavHeight:       '80px',
+  cardBorderRadius:      '16px',
+  cardMinWidth:          '320px',
+  badgeHeight:           '24px',
+  badgeBorderRadius:     '12px',
+  statusDotSize:         '10px',
+} as const;
+
+// ---------------------------------------------------------------------------
+// Breakpoints (M3 canonical)
+// ---------------------------------------------------------------------------
+export const CcBreakpoints = {
+  compact:  599,
+  medium:   767,
+  expanded: 1023,
+  large:    1439,
+} as const;
+
+// ---------------------------------------------------------------------------
+// Border Radius
+// ---------------------------------------------------------------------------
+export const CcRadius = {
+  none: '0px',
+  xs:   '4px',
+  sm:   '8px',
+  md:   '12px',
+  lg:   '16px',
+  xl:   '24px',
+  full: '9999px',
+} as const;
+
+// ---------------------------------------------------------------------------
+// Shadows (M3 elevation)
+// ---------------------------------------------------------------------------
+export const CcShadows = {
+  level0: 'none',
+  level1: '0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px -1px rgba(0, 0, 0, 0.3)',
+  level2: '0 2px 6px 0 rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3)',
+  level3: '0 4px 12px 0 rgba(0, 0, 0, 0.3), 0 4px 8px -4px rgba(0, 0, 0, 0.3)',
+  level4: '0 8px 24px 0 rgba(0, 0, 0, 0.3), 0 8px 16px -8px rgba(0, 0, 0, 0.3)',
+} as const;
+
+// ---------------------------------------------------------------------------
+// Motion
+// ---------------------------------------------------------------------------
+export const CcMotion = {
+  duration: {
+    instant:   0,
+    fast:      100,
+    short:     150,
+    medium:    200,
+    standard: 300,
+    long:     500,
+  },
+  easing: {
+    standard:   'cubic-bezier(0.4, 0, 0.2, 1)',
+    decelerate: 'cubic-bezier(0, 0, 0.2, 1)',
+    accelerate: 'cubic-bezier(0.4, 0, 1, 1)',
+    sharp:     'cubic-bezier(0.4, 0, 0.6, 1)',
+  },
+} as const;
+
+// ---------------------------------------------------------------------------
+// Accessibility
+// ---------------------------------------------------------------------------
+export const CcA11y = {
+  focusRing: {
+    width:   '2px',
+    offset:  '2px',
+    color:   '#38bdf8',
+    style:   'solid',
+  },
+  minTouchTarget: 48,
+  minBodyFont:    16,
+} as const;
+
+// ---------------------------------------------------------------------------
+// Aggregate token object for convenient access
+// ---------------------------------------------------------------------------
+export const CcTokens = {
+  color: CcColors,
+  semantic: CcSemanticColors,
+  status: CcStatusColors,
+  typography: CcTypography,
+  spacing: CcSpacing,
+  layout: CcLayout,
+  breakpoints: CcBreakpoints,
+  radius: CcRadius,
+  shadows: CcShadows,
+  motion: CcMotion,
+  a11y: CcA11y,
+} as const;
+
+// ---------------------------------------------------------------------------
+// CSS Custom Property Names
+// ---------------------------------------------------------------------------
+export const CcCssProps = {
+  // Color
+  colorPrimary:      '--cc-color-primary',
+  colorSecondary:    '--cc-color-secondary',
+  colorAccent:       '--cc-color-accent',
+  colorDanger:       '--cc-color-danger',
+
+  // Surface
+  surfaceDarkest:    '--cc-surface-darkest',
+  surfaceDark:       '--cc-surface-dark',
+  surfaceMedium:     '--cc-surface-medium',
+  surfaceLight:      '--cc-surface-light',
+  surfaceLighter:    '--cc-surface-lighter',
+
+  // On-surface
+  onSurface:         '--cc-on-surface',
+  onSurfaceVariant:  '--cc-on-surface-variant',
+  onSurfaceMuted:    '--cc-on-surface-muted',
+
+  // Status
+  statusActive:       '--cc-status-active',
+  statusIdle:         '--cc-status-idle',
+  statusThinking:    '--cc-status-thinking',
+  statusError:        '--cc-status-error',
+  statusOffline:      '--cc-status-offline',
+  statusActiveBg:     '--cc-status-active-bg',
+  statusIdleBg:       '--cc-status-idle-bg',
+  statusThinkingBg:   '--cc-status-thinking-bg',
+  statusErrorBg:      '--cc-status-error-bg',
+  statusOfflineBg:    '--cc-status-offline-bg',
+  statusActiveBorder:  '--cc-status-active-border',
+  statusIdleBorder:    '--cc-status-idle-border',
+  statusThinkingBorder: '--cc-status-thinking-border',
+  statusErrorBorder:   '--cc-status-error-border',
+  statusOfflineBorder: '--cc-status-offline-border',
+
+  // Typography
+  fontBrand: '--cc-font-brand',
+  fontBody:  '--cc-font-body',
+  fontMono:  '--cc-font-mono',
+
+  // Spacing
+  spacing2:  '--cc-spacing-2',
+  spacing4:  '--cc-spacing-4',
+  spacing6:  '--cc-spacing-6',
+  spacing8:  '--cc-spacing-8',
+  spacing12: '--cc-spacing-12',
+  spacing16: '--cc-spacing-16',
+
+  // Layout
+  navRailCollapsed: '--cc-nav-rail-collapsed',
+  navRailExpanded:  '--cc-nav-rail-expanded',
+  headerHeight:      '--cc-header-height',
+  bottomNavHeight:  '--cc-bottom-nav-height',
+  cardRadius:       '--cc-card-radius',
+  cardMinWidth:     '--cc-card-min-width',
+
+  // Radius
+  radiusNone: '--cc-radius-none',
+  radiusXs:   '--cc-radius-xs',
+  radiusSm:   '--cc-radius-sm',
+  radiusMd:   '--cc-radius-md',
+  radiusLg:   '--cc-radius-lg',
+  radiusXl:   '--cc-radius-xl',
+  radiusFull: '--cc-radius-full',
+
+  // Shadows
+  shadow0: '--cc-shadow-0',
+  shadow1: '--cc-shadow-1',
+  shadow2: '--cc-shadow-2',
+  shadow3: '--cc-shadow-3',
+  shadow4: '--cc-shadow-4',
+
+  // Motion
+  durationFast:     '--cc-duration-fast',
+  durationShort:    '--cc-duration-short',
+  durationMedium:   '--cc-duration-medium',
+  durationStandard: '--cc-duration-standard',
+  durationLong:     '--cc-duration-long',
+  easingStandard:   '--cc-easing-standard',
+  easingDecelerate: '--cc-easing-decelerate',
+  easingAccelerate: '--cc-easing-accelerate',
+
+  // Accessibility
+  focusWidth:  '--cc-focus-width',
+  focusOffset: '--cc-focus-offset',
+  focusColor:  '--cc-focus-color',
+  touchMin:    '--cc-touch-min',
+} as const;
+
+// ---------------------------------------------------------------------------
+// Utility: Read a CSS custom property from the document
+// ---------------------------------------------------------------------------
+export function getCssToken(propertyName: string): string {
+  return getComputedStyle(document.documentElement).getPropertyValue(propertyName).trim();
+}
+
+// ---------------------------------------------------------------------------
+// Utility: Set a CSS custom property on the document root
+// ---------------------------------------------------------------------------
+export function setCssToken(propertyName: string, value: string): void {
+  document.documentElement.style.setProperty(propertyName, value);
+}
+
+// ---------------------------------------------------------------------------
+// Utility: Get status color by agent status type
+// ---------------------------------------------------------------------------
+export function getStatusColor(status: string): { fg: string; bg: string; border: string } {
+  const statusMap: Record<string, { fg: string; bg: string; border: string }> = CcStatusColors;
+  return statusMap[status] ?? CcStatusColors.offline;
+}

frontend/src/app/directives/index.ts

@@ -0,0 +1 @@
+export { LongPressDirective } from './long-press.directive';

frontend/src/app/directives/long-press.directive.ts

@@ -0,0 +1,89 @@
+import {
+  Directive,
+  ElementRef,
+  EventEmitter,
+  OnDestroy,
+  Output,
+  Input,
+} from '@angular/core';
+
+// ============================================================================
+// Long-Press Directive — CUB-26
+// Emits after a sustained press (500ms default).
+// Used on agent cards to bypass the drawer and open Session Log directly.
+// ============================================================================
+
+@Directive({
+  selector: '[appLongPress]',
+  standalone: true,
+  host: {
+    '(mousedown)': 'onMouseDown($event)',
+    '(mouseup)': 'onMouseUp()',
+    '(mouseleave)': 'onMouseLeave()',
+    '(touchstart)': 'onTouchStart($event)',
+    '(touchend)': 'onTouchEnd()',
+    '(touchmove)': 'onTouchMove()',
+    '(contextmenu)': 'onContextMenu($event)',
+  },
+})
+export class LongPressDirective implements OnDestroy {
+  /** Duration in ms before a press counts as a long press. */
+  @Input() appLongPressDuration = 500;
+
+  /** Emits when a long press is detected. Payload is the original event. */
+  @Output() readonly appLongPress = new EventEmitter<MouseEvent | TouchEvent>();
+
+  private timer: ReturnType<typeof setTimeout> | null = null;
+  private isLongPress = false;
+
+  onMouseDown(event: MouseEvent): void {
+    this.isLongPress = false;
+    this.timer = setTimeout(() => {
+      this.isLongPress = true;
+      this.appLongPress.emit(event);
+    }, this.appLongPressDuration);
+  }
+
+  onMouseUp(): void {
+    this.clearTimer();
+  }
+
+  onMouseLeave(): void {
+    this.clearTimer();
+  }
+
+  onTouchStart(event: TouchEvent): void {
+    this.isLongPress = false;
+    this.timer = setTimeout(() => {
+      this.isLongPress = true;
+      this.appLongPress.emit(event);
+    }, this.appLongPressDuration);
+  }
+
+  onTouchEnd(): void {
+    this.clearTimer();
+  }
+
+  onTouchMove(): void {
+    // Cancel on touch move (finger moved)
+    this.clearTimer();
+  }
+
+  onContextMenu(event: MouseEvent): void {
+    // Prevent native context menu on long press
+    if (this.isLongPress) {
+      event.preventDefault();
+    }
+  }
+
+  ngOnDestroy(): void {
+    this.clearTimer();
+  }
+
+  private clearTimer(): void {
+    if (this.timer !== null) {
+      clearTimeout(this.timer);
+      this.timer = null;
+    }
+  }
+}

frontend/src/app/layout/bottom-nav/bottom-nav.component.scss

@@ -1,7 +1,8 @@
 // ============================================================================
 // Bottom Navigation Bar — Mobile Navigation
-// Per spec Section 3.2: M3 NavigationBar pattern
-// Visible only on compact breakpoint (< 600px)
+// Per CUB-27 spec breakpoints:
+//   Compact (0–599px): Visible — M3 NavigationBar pattern
+//   Medium+ (≥600px): Hidden — nav rail takes over
 // ============================================================================
 
 .bottom-nav {
@@ -17,6 +18,8 @@
   align-items: center;
   justify-content: space-around;
   padding: 0 8px;
+  // Safe area inset for notched devices
+  padding-bottom: env(safe-area-inset-bottom, 0px);
 }
 
 .bottom-nav__item {
@@ -68,9 +71,24 @@
   white-space: nowrap;
 }
 
-// Show bottom nav only on compact breakpoint
+// ---------------------------------------------------------------------------
+// Compact (0–599px): Show bottom nav
+// ---------------------------------------------------------------------------
 @media (max-width: 599px) {
   .bottom-nav {
     display: flex;
   }
 }
+
+// ---------------------------------------------------------------------------
+// Medium+ (≥600px): Hidden — nav rail takes over
+// ---------------------------------------------------------------------------
+
+// ---------------------------------------------------------------------------
+// Accessibility: Reduced Motion
+// ---------------------------------------------------------------------------
+@media (prefers-reduced-motion: reduce) {
+  .bottom-nav__item {
+    transition: none;
+  }
+}

frontend/src/app/layout/header-bar/header-bar.component.html

@@ -2,6 +2,16 @@
   <h1 class="header-bar__title">Command Hub</h1>
 
   <div class="header-bar__actions">
+    <!-- Quick-Jump trigger -->
+    <button
+      class="header-bar__action-btn"
+      mat-icon-button
+      aria-label="Jump to agent"
+      (click)="openQuickJump.emit()"
+    >
+      <mat-icon>keyboard_command_key</mat-icon>
+    </button>
+
     <!-- Live indicator -->
     <button
       class="header-bar__action-btn header-bar__live-btn"

frontend/src/app/layout/header-bar/header-bar.component.scss

@@ -1,36 +1,43 @@
 // ============================================================================
 // Header Bar — Top App Bar
-// Per spec Section 3.1: 64px tall, M3 MediumTopAppBar on expanded
-// Section 3.2: SmallTopAppBar on mobile
+// Per CUB-27 spec breakpoints:
+//   Compact  (0–599px):  SmallTopAppBar — 56px height, compact title, hidden labels
+//   Medium   (600–1023px): Medium top bar — 64px height
+//   Expanded (≥1024px):  MediumTopAppBar — 64px height, full actions
 // ============================================================================
 
 .header-bar {
   display: flex;
   align-items: center;
   justify-content: space-between;
-  height: var(--cc-header-height);
-  padding: 0 var(--cc-section-padding);
+  height: var(--cc-header-height-compact); // Compact by default (mobile-first)
+  padding: 0 var(--cc-section-padding-compact);
   background-color: var(--cc-surface-container-high);
   border-bottom: 1px solid var(--cc-outline);
   z-index: 20;
 }
 
 .header-bar__title {
-  font-size: 28px;
-  font-weight: 400;
+  font-size: 20px;
+  font-weight: 500;
   color: var(--cc-on-surface);
   margin: 0;
   letter-spacing: -0.01em;
+  white-space: nowrap;
+  overflow: hidden;
+  text-overflow: ellipsis;
 }
 
 .header-bar__actions {
   display: flex;
   align-items: center;
-  gap: 8px;
+  gap: 4px;
 }
 
 .header-bar__action-btn {
   color: var(--cc-on-surface-variant) !important;
+  min-width: 48px;
+  min-height: 48px;
 
   &:hover {
     color: var(--cc-on-surface) !important;
@@ -59,18 +66,61 @@
   vertical-align: middle;
 }
 
-// Mobile: smaller title
+// ---------------------------------------------------------------------------
+// Compact (0–599px): SmallTopAppBar — hide live label, tighter spacing
+// ---------------------------------------------------------------------------
 @media (max-width: 599px) {
+  .header-bar__live-label {
+    display: none; // Space saving on compact — dot alone is enough
+  }
+
+  .header-bar__actions {
+    gap: 0;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Medium (600–1023px): Medium top bar
+// ---------------------------------------------------------------------------
+@media (min-width: 600px) and (max-width: 1023px) {
   .header-bar {
-    padding: 0 16px;
+    height: var(--cc-header-height);
+    padding: 0 var(--cc-section-padding);
   }
 
   .header-bar__title {
-    font-size: 22px;
-    font-weight: 500;
+    font-size: 24px;
   }
 
-  .header-bar__live-label {
-    display: none; // Space saving on mobile — dot alone is enough
+  .header-bar__actions {
+    gap: 4px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Expanded (≥1024px): Full top bar
+// ---------------------------------------------------------------------------
+@media (min-width: 1024px) {
+  .header-bar {
+    height: var(--cc-header-height);
+    padding: 0 var(--cc-section-padding);
+  }
+
+  .header-bar__title {
+    font-size: 28px;
+    font-weight: 400;
+  }
+
+  .header-bar__actions {
+    gap: 8px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Accessibility: Reduced Motion
+// ---------------------------------------------------------------------------
+@media (prefers-reduced-motion: reduce) {
+  .header-bar__live-dot--connected {
+    animation: none;
   }
 }

frontend/src/app/layout/header-bar/header-bar.component.ts

@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, Component, signal } from '@angular/core';
+import { ChangeDetectionStrategy, Component, EventEmitter, Output, signal } from '@angular/core';
 import { MatIconModule } from '@angular/material/icon';
 import { MatButtonModule } from '@angular/material/button';
 import { MatBadgeModule } from '@angular/material/badge';
@@ -17,6 +17,9 @@ import { MatBadgeModule } from '@angular/material/badge';
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
 export class HeaderBarComponent {
+  /** Emits when the user requests the Quick-Jump drawer. */
+  @Output() readonly openQuickJump = new EventEmitter<void>();
+
   protected readonly notificationCount = signal(3);
   protected readonly isConnected = signal(true);
 

frontend/src/app/layout/layout-shell/layout-shell.component.html

@@ -4,7 +4,7 @@
 
   <div class="layout-shell__main">
     <!-- Header bar at top of content area -->
-    <app-header-bar class="layout-shell__header" />
+    <app-header-bar class="layout-shell__header" (openQuickJump)="openQuickJump()" />
 
     <!-- Scrollable content area -->
     <main class="layout-shell__content">
@@ -15,3 +15,13 @@
   <!-- Mobile: Bottom Navigation Bar -->
   <app-bottom-nav class="layout-shell__bottom-nav" />
 </div>
+
+<!-- Quick-Jump Drawer (global overlay) -->
+<app-quick-jump-drawer />
+
+<!-- Agent Session Drawer (CUB-26) — desktop: side drawer, mobile: bottom sheet -->
+<app-agent-session-drawer
+  [isMobile]="isMobile()"
+  (openSession)="onOpenSession($event)"
+  (pinToDashboard)="onPinToDashboard($event)"
+/>

frontend/src/app/layout/layout-shell/layout-shell.component.scss

@@ -1,7 +1,9 @@
 // ============================================================================
 // Layout Shell — Adaptive layout container
-// Desktop: Nav Rail (left) + Main Content (right)
-// Mobile: Header + Content + Bottom Nav (stacked)
+// Per CUB-27 spec breakpoints:
+//   Compact  (0–599px):  Header + Content + Bottom Nav (stacked)
+//   Medium   (600–1023px): Collapsed Nav Rail + Header + Content
+//   Expanded (≥1024px):  Expandable Nav Rail + Header + Content
 // ============================================================================
 
 .layout-shell {
@@ -37,21 +39,35 @@
   flex-shrink: 0;
 }
 
-// Mobile: Stack layout vertically, add bottom padding for bottom nav
+// ---------------------------------------------------------------------------
+// Compact (0–599px): Stack layout vertically, bottom nav visible
+// ---------------------------------------------------------------------------
 @media (max-width: 599px) {
   .layout-shell {
     flex-direction: column;
   }
 
   .layout-shell__content {
+    padding: var(--cc-section-padding-compact);
     // Account for bottom nav bar height
     padding-bottom: calc(var(--cc-bottom-nav-height) + 16px);
   }
 }
 
-// Tablet: Ensure content padding accommodates collapsed nav rail
+// ---------------------------------------------------------------------------
+// Medium (600–1023px): Sidebar + content, collapsed nav rail
+// ---------------------------------------------------------------------------
 @media (min-width: 600px) and (max-width: 1023px) {
   .layout-shell__content {
     padding: 20px;
   }
 }
+
+// ---------------------------------------------------------------------------
+// Expanded (≥1024px): Full nav rail with expandable behavior
+// ---------------------------------------------------------------------------
+@media (min-width: 1024px) {
+  .layout-shell__content {
+    padding: var(--cc-section-padding);
+  }
+}

frontend/src/app/layout/layout-shell/layout-shell.component.ts

@@ -1,21 +1,85 @@
-import { ChangeDetectionStrategy, Component } from '@angular/core';
-import { RouterOutlet } from '@angular/router';
+import { ChangeDetectionStrategy, Component, HostListener, OnDestroy, signal, ViewChild } from '@angular/core';
+import { Router, RouterOutlet } from '@angular/router';
+import { BreakpointObserver, Breakpoints } from '@angular/cdk/layout';
+import { Subscription } from 'rxjs';
 import { NavRailComponent } from '../nav-rail/nav-rail.component';
 import { BottomNavComponent } from '../bottom-nav/bottom-nav.component';
 import { HeaderBarComponent } from '../header-bar/header-bar.component';
+import { QuickJumpDrawerComponent } from '../../components/quick-jump-drawer/index';
+import { AgentSessionDrawerComponent } from '../../components/agent-session-drawer/index';
+import { AgentCardData } from '../../models/agent.model';
 
 /**
  * Layout Shell — wraps the main content area with adaptive navigation.
  * Desktop/Kiosk: Nav Rail (left) + Header + Content
  * Mobile: Header + Content + Bottom Nav
  * Per spec Section 3.1 (kiosk) and 3.2 (mobile).
+ * CUB-26: Hosts the Agent Session Drawer for quick-jump navigation.
  */
 @Component({
   selector: 'app-layout-shell',
   standalone: true,
-  imports: [RouterOutlet, NavRailComponent, BottomNavComponent, HeaderBarComponent],
+  imports: [RouterOutlet, NavRailComponent, BottomNavComponent, HeaderBarComponent, QuickJumpDrawerComponent, AgentSessionDrawerComponent],
   templateUrl: './layout-shell.component.html',
   styleUrl: './layout-shell.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class LayoutShellComponent {}
+export class LayoutShellComponent implements OnDestroy {
+  @ViewChild(QuickJumpDrawerComponent) quickJumpDrawer!: QuickJumpDrawerComponent;
+  @ViewChild(AgentSessionDrawerComponent) sessionDrawer!: AgentSessionDrawerComponent;
+
+  /** Whether the viewport is mobile-sized. */
+  readonly isMobile = signal(false);
+
+  private readonly breakpointSub: Subscription;
+
+  constructor(
+    private readonly breakpointObserver: BreakpointObserver,
+    private readonly router: Router,
+  ) {
+    this.breakpointSub = this.breakpointObserver
+      .observe([Breakpoints.Handset, Breakpoints.Small])
+      .subscribe((result) => {
+        this.isMobile.set(result.matches);
+      });
+  }
+
+  /** Open the quick-jump drawer from anywhere in the layout. */
+  openQuickJump(): void {
+    this.quickJumpDrawer?.open();
+  }
+
+  /** Open the session drawer for a specific agent. */
+  openSessionDrawer(agent: AgentCardData): void {
+    this.sessionDrawer?.open(agent);
+  }
+
+  /** Open the session log page directly (long-press bypass). */
+  openSessionLog(sessionKey: string): void {
+    this.router.navigate(['/sessions'], { queryParams: { key: sessionKey } });
+  }
+
+  /** Handle "Open Full Session" action from session drawer. */
+  onOpenSession(sessionKey: string): void {
+    this.router.navigate(['/sessions'], { queryParams: { key: sessionKey } });
+  }
+
+  /** Handle "Pin to Dashboard" action from session drawer. */
+  onPinToDashboard(sessionKey: string): void {
+    // TODO: Implement pin-to-dashboard logic
+    console.log('[LayoutShell] Pin to dashboard:', sessionKey);
+  }
+
+  /** Global keyboard shortcut: Ctrl+K or Cmd+K opens the quick-jump drawer. */
+  @HostListener('document:keydown', ['$event'])
+  onGlobalKeydown(event: KeyboardEvent): void {
+    if ((event.ctrlKey || event.metaKey) && event.key === 'k') {
+      event.preventDefault();
+      this.quickJumpDrawer?.toggle();
+    }
+  }
+
+  ngOnDestroy(): void {
+    this.breakpointSub.unsubscribe();
+  }
+}

frontend/src/app/layout/nav-rail/nav-rail.component.scss

@@ -1,11 +1,14 @@
 // ============================================================================
 // Nav Rail — Desktop/Kiosk Navigation
-// Per spec Section 3.1: 72px collapsed / 256px expanded
+// Per CUB-27 spec breakpoints:
+//   Compact  (0–599px):  Hidden — bottom nav takes over
+//   Medium   (600–1023px): Collapsed (72px), icon-only
+//   Expanded (≥1024px):  Expandable (72px collapsed / 256px expanded on hover)
 // Section 5.4: Spacing & Grid
 // ============================================================================
 
 .nav-rail {
-  display: flex;
+  display: none; // Hidden by default (mobile-first)
   flex-direction: column;
   width: var(--cc-nav-rail-collapsed-width);
   min-height: 100vh;
@@ -104,9 +107,52 @@
   text-overflow: ellipsis;
 }
 
-// Responsive: Hide nav rail on mobile (bottom nav takes over)
-@media (max-width: 599px) {
+// ---------------------------------------------------------------------------
+// Medium (600–1023px): Show collapsed nav rail (icon-only)
+// ---------------------------------------------------------------------------
+@media (min-width: 600px) and (max-width: 1023px) {
   .nav-rail {
+    display: flex;
+    width: var(--cc-nav-rail-collapsed-width);
+  }
+
+  // Always collapsed on medium — hide labels
+  .nav-rail__brand,
+  .nav-rail__label {
     display: none;
   }
+
+  .nav-rail__header {
+    justify-content: center;
+    padding: 16px 0;
+  }
+
+  .nav-rail__item {
+    justify-content: center;
+    padding: 0;
+    margin: 2px 8px;
+  }
+
+  // Disable expand on medium
+  .nav-rail--expanded {
+    width: var(--cc-nav-rail-collapsed-width);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Expanded (≥1024px): Full expandable nav rail
+// ---------------------------------------------------------------------------
+@media (min-width: 1024px) {
+  .nav-rail {
+    display: flex;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Accessibility: Reduced Motion
+// ---------------------------------------------------------------------------
+@media (prefers-reduced-motion: reduce) {
+  .nav-rail {
+    transition: none;
+  }
 }

frontend/src/app/layout/nav-rail/nav-rail.component.ts

@@ -1,4 +1,4 @@
-import { ChangeDetectionStrategy, Component, signal, HostListener } from '@angular/core';
+import { ChangeDetectionStrategy, Component, HostListener, signal, OnDestroy, OnInit } from '@angular/core';
 import { RouterLink, RouterLinkActive } from '@angular/router';
 import { MatIconModule } from '@angular/material/icon';
 import { MatBadgeModule } from '@angular/material/badge';
@@ -12,21 +12,52 @@ import { NAV_DESTINATIONS } from '../../models/nav.model';
   styleUrl: './nav-rail.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class NavRailComponent {
+export class NavRailComponent implements OnInit, OnDestroy {
   protected readonly destinations = NAV_DESTINATIONS;
   protected readonly expanded = signal(false);
+  protected readonly isExpandedBreakpoint = signal(false);
+
+  private readonly EXPANDED_BP = 1024;
+
+  ngOnInit(): void {
+    this.updateBreakpoint();
+  }
+
+  @HostListener('window:resize')
+  onResize(): void {
+    this.updateBreakpoint();
+  }
 
   @HostListener('mouseenter')
   onHoverIn(): void {
-    this.expanded.set(true);
+    if (this.isExpandedBreakpoint()) {
+      this.expanded.set(true);
+    }
   }
 
   @HostListener('mouseleave')
   onHoverOut(): void {
-    this.expanded.set(false);
+    if (this.isExpandedBreakpoint()) {
+      this.expanded.set(false);
+    }
   }
 
   toggleExpand(): void {
-    this.expanded.update(v => !v);
+    if (this.isExpandedBreakpoint()) {
+      this.expanded.update(v => !v);
+    }
+  }
+
+  private updateBreakpoint(): void {
+    const isExpanded = window.innerWidth >= this.EXPANDED_BP;
+    this.isExpandedBreakpoint.set(isExpanded);
+    // Collapse when leaving expanded breakpoint
+    if (!isExpanded) {
+      this.expanded.set(false);
+    }
+  }
+
+  ngOnDestroy(): void {
+    // Cleanup is handled by HostListener auto-unsubscribe
   }
 }

frontend/src/app/pages/hub/hub-page.component.html

@@ -0,0 +1,57 @@
+<!-- ========================================================================== -->
+<!-- Hub Page — Responsive Agent Card Grid with Filter Chips                   -->
+<!-- Per CUB-27 spec breakpoints:                                               -->
+<!--   Compact  (0–599px):  Single-column cards, horizontal-scroll filter chips -->
+<!--   Medium   (600–1023px): 2-column grid                                    -->
+<!--   Expanded (≥1024px): 3+ column auto-fill grid                           -->
+<!-- CUB-26: Integrates AgentCard click/long-press with session drawer.         -->
+<!-- ========================================================================== -->
+
+<div class="hub-page">
+  <h1 class="hub-page__title">Command Hub</h1>
+
+  <!-- Filter Chip Group — horizontal scroll on mobile -->
+  <div class="hub-page__filters" role="tablist" aria-label="Filter agents by status">
+    @for (filter of filters; track filter.value) {
+      <button
+        class="hub-page__filter-chip"
+        [class.hub-page__filter-chip--active]="activeFilter() === filter.value"
+        role="tab"
+        [attr.aria-selected]="activeFilter() === filter.value"
+        (click)="selectFilter(filter.value)"
+      >
+        {{ filter.label }}
+      </button>
+    }
+  </div>
+
+  <!-- Agent Card Grid -->
+  <div class="hub-page__grid">
+    @for (agent of filteredAgents(); track agent.id) {
+      <app-agent-card
+        [status]="agent.status"
+        [task]="agent.currentTask ?? ''"
+        [progress]="agent.taskProgress ?? 0"
+        [sessionKey]="agent.sessionKey"
+        [channel]="agent.channel"
+        [lastActivity]="agent.lastActivity"
+        [agentId]="agent.id"
+        [displayName]="agent.displayName"
+        [role]="agent.role"
+        [errorMessage]="agent.errorMessage ?? ''"
+        (cardClick)="onCardClick($event)"
+        (cardLongPress)="onCardLongPress($event)"
+      />
+    } @empty {
+      <p class="hub-page__empty">No agents online</p>
+    }
+  </div>
+</div>
+
+<!-- Agent Session Drawer (CUB-26) -->
+<app-agent-session-drawer
+  [isMobile]="isMobile()"
+  (openSession)="onOpenSession($event)"
+  (pinToDashboard)="onPinToDashboard($event)"
+  (drawerClose)="onDrawerClose()"
+/>

frontend/src/app/pages/hub/hub-page.component.scss

@@ -1,28 +1,141 @@
 // ============================================================================
-// Hub Page — Responsive AgentCard Grid
-// Desktop (≥1024px): 2×2 grid
-// Mobile (<1024px): single-column stack
+// Hub Page — Responsive AgentCard Grid with Filter Chips
+// Per CUB-27 spec breakpoints:
+//   Compact  (0–599px):  Single-column cards, horizontal-scroll filter chips
+//   Medium   (600–1023px): 2-column grid
+//   Expanded (≥1024px): 3+ column auto-fill grid
 // ============================================================================
 
 .hub-page {
-  display: grid;
-  grid-template-columns: 1fr;
+  display: flex;
+  flex-direction: column;
   gap: 16px;
-  padding: var(--cc-section-padding, 16px);
   min-height: 400px;
   overflow-x: hidden;
+  padding: var(--cc-section-padding);
 }
 
-.hub-page__placeholder {
+.hub-page__title {
+  grid-column: 1 / -1;
+  font-size: 24px;
+  font-weight: 600;
+  color: var(--cc-on-surface);
+  margin: 0 0 8px;
+}
+
+// ---------------------------------------------------------------------------
+// Filter Chip Group
+// ---------------------------------------------------------------------------
+.hub-page__filters {
+  display: flex;
+  gap: 8px;
+  padding: 4px 0;
+  overflow-x: auto;
+  -webkit-overflow-scrolling: touch;
+  scrollbar-width: none; // Firefox
+
+  &::-webkit-scrollbar {
+    display: none; // Chrome/Safari
+  }
+}
+
+.hub-page__filter-chip {
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  min-height: 36px;
+  min-width: 48px; // Touch target
+  padding: 6px 16px;
+  border: 1px solid var(--cc-outline);
+  border-radius: 20px;
+  background-color: transparent;
+  color: var(--cc-on-surface-variant);
+  font-size: 13px;
+  font-weight: 500;
+  letter-spacing: 0.02em;
+  cursor: pointer;
+  white-space: nowrap;
+  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
+  flex-shrink: 0; // Prevent shrinking in scroll container
+
+  &:hover {
+    background-color: rgba(255, 255, 255, 0.06);
+    color: var(--cc-on-surface);
+  }
+
+  &:focus-visible {
+    outline: 2px solid var(--status-active);
+    outline-offset: 2px;
+  }
+
+  &--active {
+    background-color: var(--status-active-bg);
+    color: var(--status-active);
+    border-color: var(--status-active);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Agent Card Grid
+// ---------------------------------------------------------------------------
+.hub-page__grid {
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: var(--cc-card-gap);
+}
+
+// ---------------------------------------------------------------------------
+// Empty State
+// ---------------------------------------------------------------------------
+.hub-page__placeholder,
+.hub-page__empty {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 48px 24px;
   color: var(--cc-on-surface-variant);
   font-size: 16px;
   text-align: center;
-  padding: 24px 0;
 }
 
-// Desktop / kiosk breakpoint — 2-column grid
-@media (min-width: 1024px) {
+// ---------------------------------------------------------------------------
+// Compact (0–599px): Single-column cards
+// ---------------------------------------------------------------------------
+@media (max-width: 599px) {
   .hub-page {
-    grid-template-columns: repeat(2, 1fr);
+    padding: 0;
+  }
+
+  .hub-page__grid {
+    grid-template-columns: 1fr;
+    gap: 12px;
+  }
+
+  .hub-page__filters {
+    padding: 4px 0 8px;
+    // Ensure horizontal scroll on mobile
+    margin: 0 -8px;
+    padding-left: 8px;
+    padding-right: 8px;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Medium (600–1023px): 2-column grid
+// ---------------------------------------------------------------------------
+@media (min-width: 600px) and (max-width: 1023px) {
+  .hub-page__grid {
+    grid-template-columns: repeat(2, 1fr);
+    gap: var(--cc-card-gap);
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Expanded (≥1024px): 3+ column auto-fill grid
+// ---------------------------------------------------------------------------
+@media (min-width: 1024px) {
+  .hub-page__grid {
+    grid-template-columns: repeat(auto-fill, minmax(var(--cc-card-min-width), 1fr));
+    gap: var(--cc-card-gap);
   }
 }

frontend/src/app/pages/hub/hub-page.component.ts

@@ -1,15 +1,153 @@
-import { ChangeDetectionStrategy, Component } from '@angular/core';
+import { ChangeDetectionStrategy, Component, signal, computed, ViewChild } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { MatChipsModule } from '@angular/material/chips';
+import { AgentCardComponent } from '../../command-hub/components/agent-card/agent-card.component';
+import { AgentSessionDrawerComponent } from '../../components/agent-session-drawer/index';
+import { AgentCardData } from '../../models/agent.model';
+import { AgentStatus } from '../../models/agent.model';
+
+/**
+ * Filter options for the hub page agent card grid.
+ * Per CUB-27: "Filter chip group (All, Active, Error, etc.) with horizontal scroll on mobile"
+ */
+export type AgentFilter = 'all' | AgentStatus;
 
 @Component({
   selector: 'app-hub-page',
   standalone: true,
-  imports: [],
-  template: `
-    <div class="hub-page">
-      <p class="hub-page__placeholder">Command Hub — Fleet status grid will render here</p>
-    </div>
-  `,
+  imports: [CommonModule, MatChipsModule, AgentCardComponent, AgentSessionDrawerComponent],
+  templateUrl: './hub-page.component.html',
   styleUrl: './hub-page.component.scss',
   changeDetection: ChangeDetectionStrategy.OnPush,
 })
-export class HubPageComponent {}
+export class HubPageComponent {
+  @ViewChild(AgentSessionDrawerComponent) sessionDrawer!: AgentSessionDrawerComponent;
+
+  readonly isMobile = signal(false);
+
+  protected readonly filters: { label: string; value: AgentFilter }[] = [
+    { label: 'All', value: 'all' },
+    { label: 'Active', value: 'active' },
+    { label: 'Idle', value: 'idle' },
+    { label: 'Thinking', value: 'thinking' },
+    { label: 'Error', value: 'error' },
+    { label: 'Offline', value: 'offline' },
+  ];
+
+  protected readonly activeFilter = signal<AgentFilter>('all');
+
+  /** Stub agent data (TODO: wire to AgentStatusService / SignalR). */
+  readonly agents = signal<AgentCardData[]>([
+    {
+      id: 'otto',
+      displayName: 'Otto',
+      role: 'Orchestrator Agent',
+      status: 'active',
+      currentTask: 'Reviewing PR #42',
+      taskProgress: 67,
+      taskElapsed: '04m 12s',
+      sessionKey: 'agent:otto:slack:CUB-42:abc123',
+      channel: 'slack',
+      lastActivity: new Date(),
+    },
+    {
+      id: 'rex',
+      displayName: 'Rex',
+      role: 'Frontend Agent',
+      status: 'thinking',
+      currentTask: 'Building responsive layout',
+      taskProgress: 40,
+      taskElapsed: '02m 30s',
+      sessionKey: 'agent:rex:telegram:CUB-27:def456',
+      channel: 'telegram',
+      lastActivity: new Date(Date.now() - 30000),
+    },
+    {
+      id: 'dex',
+      displayName: 'Dex',
+      role: 'Backend Agent',
+      status: 'idle',
+      currentTask: undefined,
+      taskProgress: undefined,
+      taskElapsed: undefined,
+      sessionKey: 'agent:dex:slack:CUB-53:ghi789',
+      channel: 'slack',
+      lastActivity: new Date(Date.now() - 300000),
+    },
+    {
+      id: 'hex',
+      displayName: 'Hex',
+      role: 'Database Agent',
+      status: 'error',
+      currentTask: 'Migration failed — rollback initiated',
+      taskProgress: 0,
+      taskElapsed: '00m 45s',
+      sessionKey: 'agent:hex:slack:CUB-56:jkl012',
+      channel: 'slack',
+      lastActivity: new Date(Date.now() - 60000),
+      errorMessage: 'Connection timeout to database server',
+    },
+    {
+      id: 'nano',
+      displayName: 'Nano',
+      role: 'ESP32 Agent',
+      status: 'offline',
+      currentTask: undefined,
+      taskProgress: undefined,
+      taskElapsed: undefined,
+      sessionKey: 'agent:nano:mqtt:CUB-48:mno345',
+      channel: 'mqtt',
+      lastActivity: new Date(Date.now() - 86400000),
+    },
+  ]);
+
+  protected readonly filteredAgents = computed(() => {
+    const filter = this.activeFilter();
+    if (filter === 'all') return this.agents();
+    return this.agents().filter(a => a.status === filter);
+  });
+
+  constructor() {
+    // Detect mobile viewport
+    if (typeof window !== 'undefined') {
+      const mql = window.matchMedia('(max-width: 599px)');
+      this.isMobile.set(mql.matches);
+      mql.addEventListener('change', (e) => this.isMobile.set(e.matches));
+    }
+  }
+
+  protected selectFilter(filter: AgentFilter): void {
+    this.activeFilter.set(filter);
+  }
+
+  /** Card click → open session drawer with agent details. */
+  onCardClick(sessionKey: string): void {
+    const agent = this.agents().find((a) => a.sessionKey === sessionKey);
+    if (agent) {
+      this.sessionDrawer?.open(agent);
+    }
+  }
+
+  /** Long-press on card → bypass drawer, go directly to session log. */
+  onCardLongPress(sessionKey: string): void {
+    console.log('[Hub] Long press — navigate to session log:', sessionKey);
+    // TODO: Navigate directly to session log page when sessions route is implemented
+  }
+
+  /** Open full session from drawer action button. */
+  onOpenSession(sessionKey: string): void {
+    console.log('[Hub] Open full session:', sessionKey);
+    // TODO: Navigate to full session view
+  }
+
+  /** Pin agent to dashboard from drawer action button. */
+  onPinToDashboard(sessionKey: string): void {
+    console.log('[Hub] Pin to dashboard:', sessionKey);
+    // TODO: Implement pin-to-dashboard
+  }
+
+  /** Drawer closed. */
+  onDrawerClose(): void {
+    // No-op for now — drawer is self-managing
+  }
+}

frontend/src/styles.scss

@@ -1,10 +1,18 @@
 // ============================================================================
 // OpenClaw Control Center — M3 Tactical Dark Theme
 // ============================================================================
-// Material Design 3 theming with custom dark palette per design spec.
-// Section 5.1: Color Palette, Section 5.2: Typography
+// Main global stylesheet. Imports the design system token modules and
+// applies the M3 dark theme. All tokens are defined once in
+//   styles/_tokens.scss     — SCSS variables and mixins
+//   styles/_css-properties.scss — CSS custom property output
+//   styles/_utilities.scss  — utility mixins for components
+//
+// Components should @use these modules rather than hardcoding values.
 // ============================================================================
 
+@use 'styles/tokens' as tokens;
+@use 'styles/css-properties' as css-props;
+@use 'styles/utilities' as utils;
 @use '@angular/material' as mat;
 
 // ---------------------------------------------------------------------------
@@ -21,11 +29,11 @@ $dark-theme: mat.define-theme((
     tertiary: mat.$violet-palette,
   ),
   typography: (
-    brand-family: 'Inter, Roboto, sans-serif',
-    plain-family: 'Inter, Roboto, sans-serif',
-    bold-weight: 600,
-    medium-weight: 500,
-    regular-weight: 400,
+    brand-family: tokens.$font-family-brand,
+    plain-family: tokens.$font-family-body,
+    bold-weight: tokens.$font-weight-bold,
+    medium-weight: tokens.$font-weight-medium,
+    regular-weight: tokens.$font-weight-regular,
   ),
   density: (
     scale: 0,
@@ -42,7 +50,10 @@ html {
 }
 
 // ---------------------------------------------------------------------------
-// Custom CSS Custom Properties — Status Colors
+// Emit Design System CSS Custom Properties
+// ---------------------------------------------------------------------------
+@include css-props.emit-custom-properties;
+
 // ---------------------------------------------------------------------------
 // Per spec Section 5.1 "Status Colors (Semantic — outside M3 tonal system)"
 // These are NOT part of the M3 tonal palette; they are semantic overrides.
@@ -88,22 +99,29 @@ html {
   --cc-nav-rail-collapsed-width: 72px;
   --cc-nav-rail-expanded-width: 256px;
   --cc-header-height: 64px;
+  --cc-header-height-compact: 56px;
   --cc-bottom-nav-height: 80px;
   --cc-card-border-radius: 16px;
-  --cc-card-min-width: 320px;
+  --cc-card-min-width: 280px;
   --cc-card-gap: 16px;
   --cc-card-padding: 20px;
   --cc-section-padding: 24px;
+  --cc-section-padding-compact: 16px;
   --cc-spacing-unit: 8px;
+
+  // --- Responsive breakpoints (CUB-27) ---
+  --cc-breakpoint-compact: 599px;   // 0-599px: phone / compact
+  --cc-breakpoint-medium: 600px;   // 600-1023px: tablet / medium
+  --cc-breakpoint-expanded: 1024px; // ≥1024px: desktop/kiosk / expanded
 }
 
 // ---------------------------------------------------------------------------
 // Global Body Styles
 // ---------------------------------------------------------------------------
 body {
-  background-color: var(--color-surface);
+  background-color: var(--cc-surface-darkest);
   color: var(--cc-on-surface);
-  font-family: 'Inter', 'Roboto', sans-serif;
+  font-family: var(--cc-font-body);
   margin: 0;
   height: 100%;
   min-height: 100vh;
@@ -111,37 +129,60 @@ body {
   -moz-osx-font-smoothing: grayscale;
 }
 
-// ---------------------------------------------------------------------------
-// M3 Surface Overrides
-// ---------------------------------------------------------------------------
-// Override M3 surface tokens to match our tactical dark palette
-// ---------------------------------------------------------------------------
-:root {
-  // Override M3 system color tokens to match custom palette
-  --mat-sys-surface: var(--cc-surface);
-  --mat-sys-surface-container: var(--cc-surface-container);
-  --mat-sys-surface-container-high: var(--cc-surface-container-high);
-  --mat-sys-on-surface: var(--cc-on-surface);
-  --mat-sys-on-surface-variant: var(--cc-on-surface-variant);
-  --mat-sys-outline: var(--cc-outline);
-  --mat-sys-background: var(--cc-background);
-}
-
 // ---------------------------------------------------------------------------
 // Typography Helpers
 // ---------------------------------------------------------------------------
 .text-mono {
   font-family: var(--cc-font-mono);
-  font-size: 13px;
-  font-weight: 400;
-  letter-spacing: 0.02em;
+  font-size: tokens.$font-size-body-medium;
+  font-weight: tokens.$font-weight-regular;
+  letter-spacing: tokens.$letter-spacing-mono;
+}
+
+.text-display-large {
+  font-size: tokens.$font-size-display-large;
+  font-weight: tokens.$font-weight-heavy;
+  line-height: tokens.$line-height-tight;
+  letter-spacing: tokens.$letter-spacing-tight;
+}
+
+.text-headline-medium {
+  font-size: tokens.$font-size-headline-medium;
+  font-weight: tokens.$font-weight-bold;
+  line-height: tokens.$line-height-tight;
+}
+
+.text-title-large {
+  font-size: tokens.$font-size-title-large;
+  font-weight: tokens.$font-weight-bold;
+}
+
+.text-title-medium {
+  font-size: tokens.$font-size-title-medium;
+  font-weight: tokens.$font-weight-medium;
+}
+
+.text-body-large {
+  font-size: tokens.$font-size-body-large;
+  font-weight: tokens.$font-weight-regular;
+  line-height: tokens.$line-height-normal;
+}
+
+.text-body-medium {
+  font-size: tokens.$font-size-body-medium;
+  font-weight: tokens.$font-weight-regular;
+  line-height: tokens.$line-height-normal;
+}
+
+.text-label-medium {
+  font-size: tokens.$font-size-label-medium;
+  font-weight: tokens.$font-weight-medium;
+  letter-spacing: tokens.$letter-spacing-wide;
 }
 
 // ---------------------------------------------------------------------------
 // Status Dot Pulse Animations
 // ---------------------------------------------------------------------------
-// Per spec Section 7.5: Animation Specs
-// ---------------------------------------------------------------------------
 @keyframes pulse-active {
   0%, 100% { opacity: 1; transform: scale(1); }
   50% { opacity: 0.7; transform: scale(1.15); }
@@ -158,35 +199,35 @@ body {
 }
 
 // ---------------------------------------------------------------------------
-// Utility Classes
+// Status Dot Utility Classes
 // ---------------------------------------------------------------------------
 .status-dot {
-  width: 10px;
-  height: 10px;
-  border-radius: 50%;
+  width: tokens.$status-dot-size;
+  height: tokens.$status-dot-size;
+  border-radius: tokens.$radius-full;
   display: inline-block;
 
   &--active {
-    background-color: var(--status-active);
-    animation: pulse-active 2s ease-in-out infinite;
+    background-color: var(--cc-status-active);
+    animation: pulse-active tokens.$duration-standard tokens.$easing-standard infinite;
   }
 
   &--idle {
-    background-color: var(--status-idle);
+    background-color: var(--cc-status-idle);
   }
 
   &--thinking {
-    background-color: var(--status-thinking);
-    animation: pulse-thinking 3s ease-in-out infinite;
+    background-color: var(--cc-status-thinking);
+    animation: pulse-thinking 3s tokens.$easing-standard infinite;
   }
 
   &--error {
-    background-color: var(--status-error);
-    animation: pulse-error 0.8s ease-in-out infinite;
+    background-color: var(--cc-status-error);
+    animation: pulse-error tokens.$duration-fast tokens.$easing-standard infinite;
   }
 
   &--offline {
-    background-color: var(--status-offline);
+    background-color: var(--cc-status-offline);
   }
 }
 
@@ -201,6 +242,27 @@ body {
   }
 }
 
+// ---------------------------------------------------------------------------
+// Screen-reader-only utility
+// ---------------------------------------------------------------------------
+.sr-only {
+  @include tokens.sr-only;
+}
+
+// ---------------------------------------------------------------------------
+// Truncate utility
+// ---------------------------------------------------------------------------
+.truncate {
+  @include tokens.truncate;
+}
+
+// ---------------------------------------------------------------------------
+// Focus ring utility
+// ---------------------------------------------------------------------------
+.focus-ring {
+  @include tokens.focus-ring;
+}
+
 // ---------------------------------------------------------------------------
 // Scrollbar Styling (Tactical Dark)
 // ---------------------------------------------------------------------------
@@ -210,11 +272,11 @@ body {
 }
 
 ::-webkit-scrollbar-track {
-  background: var(--cc-surface);
+  background: var(--cc-surface-dark);
 }
 
 ::-webkit-scrollbar-thumb {
-  background: var(--cc-outline);
+  background: var(--cc-surface-lighter);
   border-radius: 3px;
 
   &:hover {

frontend/src/styles/_css-properties.scss

@@ -0,0 +1,115 @@
+// ============================================================================
+// OpenClaw Control Center — CSS Custom Property Output
+// ============================================================================
+// This module emits ALL design tokens as CSS custom properties on :root.
+// Import this in styles.scss to make tokens available to all components.
+//
+// Tokens are namespaced with --cc- (Control Center) to avoid collisions
+// with Angular Material's --mat- variables.
+// ============================================================================
+
+@use 'tokens' as *;
+
+// ---------------------------------------------------------------------------
+// Emit all CSS custom properties
+// ---------------------------------------------------------------------------
+@mixin emit-custom-properties {
+  :root {
+    // --- Color tokens ---
+    --cc-color-primary:       #{$color-primary-500};
+    --cc-color-secondary:     #{$color-secondary-400};
+    --cc-color-accent:        #{$color-accent-400};
+    --cc-color-danger:        #{$color-danger-400};
+
+    // --- Surface tokens ---
+    --cc-surface-darkest:     #{$color-surface-darkest};
+    --cc-surface-dark:        #{$color-surface-dark};
+    --cc-surface-medium:      #{$color-surface-medium};
+    --cc-surface-light:       #{$color-surface-light};
+    --cc-surface-lighter:     #{$color-surface-lighter};
+
+    // --- On-surface tokens ---
+    --cc-on-surface:          #{$color-on-surface};
+    --cc-on-surface-variant:  #{$color-on-surface-variant};
+    --cc-on-surface-muted:    #{$color-on-surface-muted};
+
+    // --- Status tokens ---
+    --cc-status-active:       #{$status-active};
+    --cc-status-idle:         #{$status-idle};
+    --cc-status-thinking:     #{$status-thinking};
+    --cc-status-error:        #{$status-error};
+    --cc-status-offline:      #{$status-offline};
+
+    --cc-status-active-bg:    #{$status-active-bg};
+    --cc-status-idle-bg:      #{$status-idle-bg};
+    --cc-status-thinking-bg:  #{$status-thinking-bg};
+    --cc-status-error-bg:     #{$status-error-bg};
+    --cc-status-offline-bg:   #{$status-offline-bg};
+
+    --cc-status-active-border:  #{$status-active-border};
+    --cc-status-idle-border:    #{$status-idle-border};
+    --cc-status-thinking-border: #{$status-thinking-border};
+    --cc-status-error-border:   #{$status-error-border};
+    --cc-status-offline-border:  #{$status-offline-border};
+
+    // --- Typography tokens ---
+    --cc-font-brand:   #{$font-family-brand};
+    --cc-font-body:    #{$font-family-body};
+    --cc-font-mono:    #{$font-family-mono};
+
+    // --- Spacing tokens ---
+    --cc-spacing-0:   #{$spacing-0};
+    --cc-spacing-1:   #{$spacing-1};
+    --cc-spacing-2:   #{$spacing-2};
+    --cc-spacing-3:   #{$spacing-3};
+    --cc-spacing-4:   #{$spacing-4};
+    --cc-spacing-5:   #{$spacing-5};
+    --cc-spacing-6:   #{$spacing-6};
+    --cc-spacing-7:   #{$spacing-7};
+    --cc-spacing-8:   #{$spacing-8};
+    --cc-spacing-10:  #{$spacing-10};
+    --cc-spacing-12:  #{$spacing-12};
+    --cc-spacing-16:  #{$spacing-16};
+
+    // --- Layout tokens ---
+    --cc-nav-rail-collapsed:  #{$nav-rail-collapsed-width};
+    --cc-nav-rail-expanded:   #{$nav-rail-expanded-width};
+    --cc-header-height:        #{$header-height};
+    --cc-bottom-nav-height:   #{$bottom-nav-height};
+    --cc-card-radius:         #{$card-border-radius};
+    --cc-card-min-width:      #{$card-min-width};
+
+    // --- Radius tokens ---
+    --cc-radius-none:  #{$radius-none};
+    --cc-radius-xs:    #{$radius-xs};
+    --cc-radius-sm:    #{$radius-sm};
+    --cc-radius-md:    #{$radius-md};
+    --cc-radius-lg:    #{$radius-lg};
+    --cc-radius-xl:    #{$radius-xl};
+    --cc-radius-full:  #{$radius-full};
+
+    // --- Shadow tokens ---
+    --cc-shadow-0: #{$shadow-level-0};
+    --cc-shadow-1: #{$shadow-level-1};
+    --cc-shadow-2: #{$shadow-level-2};
+    --cc-shadow-3: #{$shadow-level-3};
+    --cc-shadow-4: #{$shadow-level-4};
+
+    // --- Motion tokens ---
+    --cc-duration-fast:     #{$duration-fast};
+    --cc-duration-short:    #{$duration-short};
+    --cc-duration-medium:   #{$duration-medium};
+    --cc-duration-standard: #{$duration-standard};
+    --cc-duration-long:     #{$duration-long};
+
+    --cc-easing-standard:   #{$easing-standard};
+    --cc-easing-decelerate: #{$easing-decelerate};
+    --cc-easing-accelerate: #{$easing-accelerate};
+
+    // --- Accessibility tokens ---
+    --cc-focus-width:  #{$focus-ring-width};
+    --cc-focus-offset: #{$focus-ring-offset};
+    --cc-focus-color:  #{$focus-ring-color};
+    --cc-touch-min:    #{$min-touch-target};
+  }
+}

frontend/src/styles/_tokens.scss

@@ -0,0 +1,474 @@
+// ============================================================================
+// OpenClaw Control Center — M3 Design Tokens
+// ============================================================================
+// Single source of truth for all design tokens.
+// Components should @use this module and reference tokens via variables or
+// the theme() mixin rather than hardcoding values.
+//
+// Token structure:
+//   1. Color tokens    — palette, semantic, status, surface
+//   2. Typography      — families, sizes, weights, line-heights
+//   3. Spacing         — 4px base grid, named steps
+//   4. Layout          — dimensions, breakpoints, radii, shadows
+//   5. Motion          — durations, easing curves
+//   6. Accessibility   — focus, reduced-motion
+// ============================================================================
+
+@use 'sass:map';
+@use 'sass:meta';
+
+// ============================================================================
+// 1. COLOR TOKENS
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// 1a. Primary Palette (M3 cyan-based)
+// ---------------------------------------------------------------------------
+$color-primary-50:  #ecfeff;
+$color-primary-100: #cffafe;
+$color-primary-200: #a5f3fc;
+$color-primary-300: #67e8f9;
+$color-primary-400: #22d3ee;
+$color-primary-500: #38bdf8;  // Brand primary
+$color-primary-600: #0ea5e9;
+$color-primary-700: #0284c7;
+$color-primary-800: #0369a1;
+$color-primary-900: #075985;
+
+// ---------------------------------------------------------------------------
+// 1b. Secondary Palette (M3 teal-based)
+// ---------------------------------------------------------------------------
+$color-secondary-50:  #f0fdfa;
+$color-secondary-100: #ccfbf1;
+$color-secondary-200: #99f6e4;
+$color-secondary-300: #5eead4;
+$color-secondary-400: #2dd4bf;  // Brand secondary
+$color-secondary-500: #14b8a6;
+$color-secondary-600: #0d9488;
+$color-secondary-700: #0f766e;
+$color-secondary-800: #115e59;
+$color-secondary-900: #134e4a;
+
+// ---------------------------------------------------------------------------
+// 1c. Accent / Tertiary Palette (M3 violet-based)
+// ---------------------------------------------------------------------------
+$color-accent-50:  #f5f3ff;
+$color-accent-100: #ede9fe;
+$color-accent-200: #ddd6fe;
+$color-accent-300: #c4b5fd;
+$color-accent-400: #a78bfa;  // Brand accent
+$color-accent-500: #8b5cf6;
+$color-accent-600: #7c3aed;
+$color-accent-700: #6d28d9;
+$color-accent-800: #5b21b6;
+$color-accent-900: #4c1d95;
+
+// ---------------------------------------------------------------------------
+// 1d. Danger / Error Palette
+// ---------------------------------------------------------------------------
+$color-danger-50:  #fef2f2;
+$color-danger-100: #fee2e2;
+$color-danger-200: #fecaca;
+$color-danger-300: #fca5a5;
+$color-danger-400: #f87171;  // Brand danger
+$color-danger-500: #ef4444;
+$color-danger-600: #dc2626;
+$color-danger-700: #b91c1c;
+$color-danger-800: #991b1b;
+$color-danger-900: #7f1d1d;
+
+// ---------------------------------------------------------------------------
+// 1e. Semantic Surface Tokens (Tactical Dark)
+// ---------------------------------------------------------------------------
+$color-surface-darkest:   #0D0F12;  // Page background
+$color-surface-dark:      #13161A;  // Card / container surface
+$color-surface-medium:     #1C2027;  // Container-elevated
+$color-surface-light:      #252B33;  // Container-high / hover
+$color-surface-lighter:    #2D3748;  // Border / divider zone
+
+$color-on-surface:         #E2E8F0;  // Primary text on dark surfaces
+$color-on-surface-variant: #8A9BB0;  // Secondary / muted text
+$color-on-surface-muted:   #64748B;  // Disabled / hint text
+
+// ---------------------------------------------------------------------------
+// 1f. Status Colors (Semantic — outside M3 tonal system)
+// ---------------------------------------------------------------------------
+$status-active:    #38bdf8;
+$status-idle:      #2dd4bf;
+$status-thinking:  #a78bfa;
+$status-error:     #f87171;
+$status-offline:   #64748b;
+
+// Status background tints (12% opacity for badges, pills, backgrounds)
+$status-active-bg:    rgba(56, 189, 248, 0.12);
+$status-idle-bg:      rgba(45, 212, 191, 0.12);
+$status-thinking-bg:  rgba(167, 139, 250, 0.12);
+$status-error-bg:     rgba(248, 113, 113, 0.12);
+$status-offline-bg:   rgba(100, 116, 139, 0.12);
+
+// Status border colors (40% opacity)
+$status-active-border: rgba(56, 189, 248, 0.40);
+$status-idle-border:   rgba(45, 212, 191, 0.40);
+$status-thinking-border: rgba(167, 139, 250, 0.40);
+$status-error-border:  rgba(248, 113, 113, 0.40);
+$status-offline-border: rgba(100, 116, 139, 0.40);
+
+// Map for iteration
+$status-colors: (
+  'active':   ('fg': $status-active,   'bg': $status-active-bg,   'border': $status-active-border),
+  'idle':     ('fg': $status-idle,     'bg': $status-idle-bg,     'border': $status-idle-border),
+  'thinking': ('fg': $status-thinking, 'bg': $status-thinking-bg,  'border': $status-thinking-border),
+  'error':    ('fg': $status-error,    'bg': $status-error-bg,     'border': $status-error-border),
+  'offline':  ('fg': $status-offline,   'bg': $status-offline-bg,   'border': $status-offline-border),
+);
+
+// ---------------------------------------------------------------------------
+// 1g. Full color map for programmatic access
+// ---------------------------------------------------------------------------
+$colors: (
+  'primary':       $color-primary-500,
+  'secondary':     $color-secondary-400,
+  'accent':        $color-accent-400,
+  'danger':        $color-danger-400,
+  'surface':       $color-surface-dark,
+  'surface-light': $color-surface-light,
+  'on-surface':    $color-on-surface,
+  'on-surface-variant': $color-on-surface-variant,
+  'border':        $color-surface-lighter,
+);
+
+// ============================================================================
+// 2. TYPOGRAPHY TOKENS
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// 2a. Font Families
+// ---------------------------------------------------------------------------
+$font-family-brand:  'Inter, Roboto, sans-serif';
+$font-family-body:   'Inter, Roboto, sans-serif';
+$font-family-mono:   'Roboto Mono, Cascadia Code, Fira Code, monospace';
+
+// ---------------------------------------------------------------------------
+// 2b. Font Sizes (M3 type scale)
+// ---------------------------------------------------------------------------
+$font-size-display-large:  57px;
+$font-size-display-medium: 45px;
+$font-size-display-small:  36px;
+$font-size-headline-large: 32px;
+$font-size-headline-medium: 28px;
+$font-size-headline-small:  24px;
+$font-size-title-large:     22px;
+$font-size-title-medium:    16px;
+$font-size-title-small:     14px;
+$font-size-body-large:      16px;
+$font-size-body-medium:     14px;
+$font-size-body-small:      12px;
+$font-size-label-large:     14px;
+$font-size-label-medium:    12px;
+$font-size-label-small:     11px;
+
+// ---------------------------------------------------------------------------
+// 2c. Font Weights
+// ---------------------------------------------------------------------------
+$font-weight-regular: 400;
+$font-weight-medium:   500;
+$font-weight-bold:     600;
+$font-weight-heavy:    700;
+
+// ---------------------------------------------------------------------------
+// 2d. Line Heights
+// ---------------------------------------------------------------------------
+$line-height-tight:   1.2;
+$line-height-normal:   1.5;
+$line-height-relaxed:  1.6;
+
+// ---------------------------------------------------------------------------
+// 2e. Letter Spacing
+// ---------------------------------------------------------------------------
+$letter-spacing-tight:    -0.01em;
+$letter-spacing-normal:    0em;
+$letter-spacing-wide:      0.02em;
+$letter-spacing-mono:      0.05em;
+
+// ---------------------------------------------------------------------------
+// 2f. Typography map
+// ---------------------------------------------------------------------------
+$typography: (
+  'font-family-brand':  $font-family-brand,
+  'font-family-body':   $font-family-body,
+  'font-family-mono':   $font-family-mono,
+  'size-display-large': $font-size-display-large,
+  'size-headline-medium': $font-size-headline-medium,
+  'size-title-large':    $font-size-title-large,
+  'size-title-medium':   $font-size-title-medium,
+  'size-body-large':     $font-size-body-large,
+  'size-body-medium':    $font-size-body-medium,
+  'size-body-small':     $font-size-body-small,
+  'size-label-large':    $font-size-label-large,
+  'size-label-medium':   $font-size-label-medium,
+  'weight-regular':      $font-weight-regular,
+  'weight-medium':       $font-weight-medium,
+  'weight-bold':         $font-weight-bold,
+);
+
+// ============================================================================
+// 3. SPACING TOKENS (4px grid)
+// ============================================================================
+
+$spacing-0:   0px;
+$spacing-1:   4px;
+$spacing-2:   8px;
+$spacing-3:   12px;
+$spacing-4:   16px;
+$spacing-5:   20px;
+$spacing-6:   24px;
+$spacing-7:   28px;
+$spacing-8:   32px;
+$spacing-9:   36px;
+$spacing-10:  40px;
+$spacing-12:  48px;
+$spacing-14:  56px;
+$spacing-16:  64px;
+$spacing-20:  80px;
+
+// Named semantic spacing
+$spacing-unit:        $spacing-2;    // 8px — base grid unit
+$spacing-card-gap:    $spacing-4;    // 16px
+$spacing-card-pad:    $spacing-5;    // 20px
+$spacing-section:     $spacing-6;    // 24px
+
+// ============================================================================
+// 4. LAYOUT TOKENS
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// 4a. Dimensions
+// ---------------------------------------------------------------------------
+$nav-rail-collapsed-width:  72px;
+$nav-rail-expanded-width:   256px;
+$header-height:              64px;
+$bottom-nav-height:          80px;
+$card-border-radius:         16px;
+$card-min-width:             320px;
+$badge-height:               24px;
+$badge-border-radius:        12px;
+$status-dot-size:            10px;
+
+// ---------------------------------------------------------------------------
+// 4b. Breakpoints (M3 canonical)
+// ---------------------------------------------------------------------------
+$breakpoint-compact:  599px;   // Mobile phone
+$breakpoint-medium:   767px;   // Tablet portrait
+$breakpoint-expanded:  1023px;  // Tablet landscape
+$breakpoint-large:    1439px;  // Desktop
+
+// Named breakpoint map for @media mixins
+$breakpoints: (
+  'compact':  $breakpoint-compact,
+  'medium':   $breakpoint-medium,
+  'expanded': $breakpoint-expanded,
+  'large':    $breakpoint-large,
+);
+
+// ---------------------------------------------------------------------------
+// 4c. Border Radius
+// ---------------------------------------------------------------------------
+$radius-none:   0px;
+$radius-xs:     4px;
+$radius-sm:     8px;
+$radius-md:     12px;
+$radius-lg:     16px;
+$radius-xl:     24px;
+$radius-full:    9999px;
+
+// ---------------------------------------------------------------------------
+// 4d. Shadows (M3 elevation)
+// ---------------------------------------------------------------------------
+$shadow-level-0: none;
+$shadow-level-1: 0 1px 3px 0 rgba(0, 0, 0, 0.3), 0 1px 2px -1px rgba(0, 0, 0, 0.3);
+$shadow-level-2: 0 2px 6px 0 rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
+$shadow-level-3: 0 4px 12px 0 rgba(0, 0, 0, 0.3), 0 4px 8px -4px rgba(0, 0, 0, 0.3);
+$shadow-level-4: 0 8px 24px 0 rgba(0, 0, 0, 0.3), 0 8px 16px -8px rgba(0, 0, 0, 0.3);
+
+// ============================================================================
+// 5. MOTION TOKENS
+// ============================================================================
+
+$duration-instant:   0ms;      // No animation (reduced motion fallback)
+$duration-fast:      100ms;
+$duration-short:     150ms;
+$duration-medium:    200ms;
+$duration-standard:  300ms;
+$duration-long:       500ms;
+
+$easing-standard:  cubic-bezier(0.4, 0, 0.2, 1);   // M3 standard
+$easing-decelerate: cubic-bezier(0, 0, 0.2, 1);     // M3 decelerate (entering)
+$easing-accelerate: cubic-bezier(0.4, 0, 1, 1);     // M3 accelerate (exiting)
+$easing-sharp:     cubic-bezier(0.4, 0, 0.6, 1);    // M3 sharp
+
+// ============================================================================
+// 6. ACCESSIBILITY TOKENS
+// ============================================================================
+
+$focus-ring-width:    2px;
+$focus-ring-offset:   2px;
+$focus-ring-color:    $status-active;
+$focus-ring-style:    solid;
+
+$min-touch-target:    48px;
+$min-body-font:       16px;
+
+// ============================================================================
+// MIXINS
+// ============================================================================
+
+// ---------------------------------------------------------------------------
+// Responsive breakpoint mixin
+// Usage: @include tokens.respond-to('expanded') { ... }
+// ---------------------------------------------------------------------------
+@mixin respond-to($breakpoint) {
+  $value: map.get($breakpoints, $breakpoint);
+  @if $value {
+    @media (min-width: $value + 1) {
+      @content;
+    }
+  } @else {
+    @error "Unknown breakpoint: `#{$breakpoint}`. Valid: compact, medium, expanded, large";
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Below-breakpoint mixin (max-width)
+// Usage: @include tokens.below('expanded') { ... }
+// ---------------------------------------------------------------------------
+@mixin below($breakpoint) {
+  $value: map.get($breakpoints, $breakpoint);
+  @if $value {
+    @media (max-width: $value) {
+      @content;
+    }
+  } @else {
+    @error "Unknown breakpoint: `#{$breakpoint}`. Valid: compact, medium, expanded, large";
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Focus ring mixin
+// ---------------------------------------------------------------------------
+@mixin focus-ring($color: $focus-ring-color) {
+  &:focus-visible {
+    outline: $focus-ring-width $focus-ring-style $color;
+    outline-offset: $focus-ring-offset;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Card surface mixin
+// ---------------------------------------------------------------------------
+@mixin card-surface {
+  background-color: $color-surface-medium;
+  border-radius: $card-border-radius;
+  border: 1px solid $color-surface-lighter;
+}
+
+// ---------------------------------------------------------------------------
+// Mono text mixin
+// ---------------------------------------------------------------------------
+@mixin mono-text($size: $font-size-body-medium) {
+  font-family: $font-family-mono;
+  font-size: $size;
+  letter-spacing: $letter-spacing-mono;
+}
+
+// ---------------------------------------------------------------------------
+// Status dot mixin
+// ---------------------------------------------------------------------------
+@mixin status-dot($status) {
+  $colors: map.get($status-colors, $status);
+  @if not $colors {
+    @error "Unknown status: `#{$status}`. Valid: active, idle, thinking, error, offline";
+  }
+  $fg: map.get($colors, 'fg');
+
+  width: $status-dot-size;
+  height: $status-dot-size;
+  border-radius: $radius-full;
+  background-color: $fg;
+
+  @if $status == 'active' {
+    animation: pulse-active $duration-standard $easing-standard infinite;
+  } @else if $status == 'thinking' {
+    animation: pulse-thinking 3s $easing-standard infinite;
+  } @else if $status == 'error' {
+    animation: pulse-error $duration-fast $easing-standard infinite;
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Truncate text mixin (single line)
+// ---------------------------------------------------------------------------
+@mixin truncate {
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+// ---------------------------------------------------------------------------
+// Screen-reader-only mixin
+// ---------------------------------------------------------------------------
+@mixin sr-only {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  padding: 0;
+  margin: -1px;
+  overflow: hidden;
+  clip: rect(0, 0, 0, 0);
+  white-space: nowrap;
+  border: 0;
+}
+
+// ---------------------------------------------------------------------------
+// Touch target mixin — ensures minimum 48px touch area
+// ---------------------------------------------------------------------------
+@mixin touch-target($min-size: $min-touch-target) {
+  min-width: $min-size;
+  min-height: $min-size;
+}
+// ============================================================================
+// CUB-20 / CUB-27 CONVENIENCE ALIASES
+// ============================================================================
+// Short aliases used by agent-card, hub-page, and other components.
+// These map to the canonical M3 tokens above.
+
+$cc-background:            $color-surface-darkest;
+$cc-surface:               $color-surface-dark;
+$cc-surface-container:     $color-surface-medium;
+$cc-surface-container-high: $color-surface-light;
+$cc-on-surface:            $color-on-surface;
+$cc-on-surface-variant:    $color-on-surface-variant;
+$cc-outline:               $color-surface-lighter;
+
+$cc-font-mono:             $font-family-mono;
+$cc-font-family:           $font-family-brand;
+
+$cc-nav-rail-collapsed-width:  $nav-rail-collapsed-width;
+$cc-nav-rail-expanded-width:   $nav-rail-expanded-width;
+$cc-header-height:              $header-height;
+$cc-bottom-nav-height:          $bottom-nav-height;
+$cc-card-border-radius:         $card-border-radius;
+$cc-card-min-width:             $card-min-width;
+$cc-card-gap:                   $spacing-card-gap;
+$cc-card-padding:               $spacing-card-pad;
+$cc-section-padding:            $spacing-section;
+$cc-spacing-unit:               $spacing-unit;
+
+$cc-breakpoint-mobile:   $breakpoint-compact;
+$cc-breakpoint-tablet:   $breakpoint-medium;
+$cc-breakpoint-desktop:  $breakpoint-expanded;
+
+$cc-surface-darkest: $color-surface-darkest;
+$cc-surface-dark:    $color-surface-dark;
+$cc-surface-medium:  $color-surface-medium;
+$cc-surface-light:  $color-surface-light;
+$cc-surface-lighter: $color-surface-lighter;

frontend/src/styles/_utilities.scss

@@ -0,0 +1,170 @@
+// ============================================================================
+// OpenClaw Control Center — Utility Mixins
+// ============================================================================
+// Reusable patterns that enforce design-system consistency.
+// Components should @use this module and include mixins rather than
+// writing repetitive CSS blocks.
+// ============================================================================
+
+@use 'tokens' as *;
+
+// ---------------------------------------------------------------------------
+// Elevation / Surface Card
+// Applies consistent card styling using design tokens.
+// Usage: @include utils.card-surface();
+// ---------------------------------------------------------------------------
+@mixin card-surface($elevation: 1) {
+  background-color: var(--cc-surface-medium);
+  border-radius: var(--cc-card-radius);
+  border: 1px solid var(--cc-surface-lighter);
+  box-shadow: var(--cc-shadow-#{$elevation});
+  transition: box-shadow var(--cc-duration-short) var(--cc-easing-standard);
+}
+
+// ---------------------------------------------------------------------------
+// Elevated card on hover
+// ---------------------------------------------------------------------------
+@mixin card-hover($elevation: 2) {
+  &:hover {
+    box-shadow: var(--cc-shadow-#{$elevation});
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Status-aware left border
+// Applies colored left border based on agent status.
+// Usage: @include utils.status-border('active');
+// ---------------------------------------------------------------------------
+@mixin status-border($status) {
+  $status-map: (
+    'active':   var(--cc-status-active),
+    'idle':     var(--cc-status-idle),
+    'thinking': var(--cc-status-thinking),
+    'error':    var(--cc-status-error),
+    'offline':  var(--cc-status-offline),
+  );
+  $color: map-get($status-map, $status);
+  @if not $color {
+    $color: var(--cc-status-offline);
+  }
+  border-left: 4px solid $color;
+}
+
+// ---------------------------------------------------------------------------
+// Status badge / pill
+// ---------------------------------------------------------------------------
+@mixin status-badge($status) {
+  $fg-map: (
+    'active':   var(--cc-status-active),
+    'idle':     var(--cc-status-idle),
+    'thinking': var(--cc-status-thinking),
+    'error':    var(--cc-status-error),
+    'offline':  var(--cc-status-offline),
+  );
+  $bg-map: (
+    'active':   var(--cc-status-active-bg),
+    'idle':     var(--cc-status-idle-bg),
+    'thinking': var(--cc-status-thinking-bg),
+    'error':    var(--cc-status-error-bg),
+    'offline':  var(--cc-status-offline-bg),
+  );
+
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+  height: $badge-height;
+  padding: 0 8px;
+  border-radius: $badge-border-radius;
+  background-color: map-get($bg-map, $status);
+  color: map-get($fg-map, $status);
+  font-size: $font-size-label-medium;
+  font-weight: $font-weight-medium;
+  white-space: nowrap;
+}
+
+// ---------------------------------------------------------------------------
+// Glass surface (frosted glass effect)
+// ---------------------------------------------------------------------------
+@mixin glass-surface {
+  background-color: rgba(19, 22, 26, 0.8);
+  backdrop-filter: blur(8px);
+  -webkit-backdrop-filter: blur(8px);
+  border: 1px solid var(--cc-surface-lighter);
+}
+
+// ---------------------------------------------------------------------------
+// Responsive grid
+// Creates a responsive grid that adapts from 1-col to 2-col.
+// ---------------------------------------------------------------------------
+@mixin responsive-grid($min-col-width: $card-min-width, $gap: $spacing-card-gap) {
+  display: grid;
+  grid-template-columns: repeat(auto-fill, minmax($min-col-width, 1fr));
+  gap: $gap;
+}
+
+// ---------------------------------------------------------------------------
+// Scroll container
+// ---------------------------------------------------------------------------
+@mixin scroll-container($direction: 'y') {
+  @if $direction == 'y' {
+    overflow-y: auto;
+    overflow-x: hidden;
+  } @else {
+    overflow-x: auto;
+    overflow-y: hidden;
+  }
+  -webkit-overflow-scrolling: touch;
+
+  // Custom scrollbar (tactical dark)
+  &::-webkit-scrollbar {
+    width: 6px;
+    height: 6px;
+  }
+  &::-webkit-scrollbar-track {
+    background: var(--cc-surface-dark);
+  }
+  &::-webkit-scrollbar-thumb {
+    background: var(--cc-surface-lighter);
+    border-radius: 3px;
+    &:hover {
+      background: var(--cc-on-surface-variant);
+    }
+  }
+}
+
+// ---------------------------------------------------------------------------
+// Page container
+// Standard page padding and layout
+// ---------------------------------------------------------------------------
+@mixin page-container {
+  padding: $spacing-section;
+  min-height: 400px;
+  overflow-x: hidden;
+}
+
+// ---------------------------------------------------------------------------
+// Transition helpers
+// ---------------------------------------------------------------------------
+@mixin transition-colors($duration: $duration-short) {
+  transition: color #{$duration} $easing-standard,
+              background-color #{$duration} $easing-standard,
+              border-color #{$duration} $easing-standard;
+}
+
+@mixin transition-transform($duration: $duration-medium) {
+  transition: transform #{$duration} $easing-standard;
+}
+
+@mixin transition-opacity($duration: $duration-short) {
+  transition: opacity #{$duration} $easing-standard;
+}
+
+// ---------------------------------------------------------------------------
+// Reduced motion
+// Wraps content in a reduced-motion media query.
+// ---------------------------------------------------------------------------
+@mixin reduced-motion {
+  @media (prefers-reduced-motion: reduce) {
+    @content;
+  }
+}

go-backend/.dockerignore

@@ -0,0 +1,35 @@
+# Ignore local build artifacts and version-control files
+*.exe
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+bin/
+dist/
+
+# Version control
+.git
+.gitignore
+
+# IDE / editor
+.idea
+.vscode
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Dependency cache (already fetched in Dockerfile)
+vendor/
+
+# Documentation
+README.md
+*.md
+
+# CI / CD
+.github/
+.gitea/

go-backend/Dockerfile

@@ -0,0 +1,35 @@
+# Build stage
+FROM golang:1.23-alpine AS builder
+WORKDIR /app
+
+# Install build dependencies
+RUN apk add --no-cache git ca-certificates
+
+# Copy dependency files first for better layer caching
+COPY go.mod go.sum ./
+RUN go mod download
+
+# Copy source code
+COPY . .
+
+# Build the binary
+RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-w -s" -o /bin/server ./cmd/server
+
+# ── Final stage ─────────────────────────────────────────────────────────
+FROM alpine:latest
+WORKDIR /app
+
+# Install ca-certificates for HTTPS outbound calls
+RUN apk --no-cache add ca-certificates
+
+# Copy binary from builder
+COPY --from=builder /bin/server /app/server
+
+# Expose the default port (overridden by PORT env var)
+EXPOSE 8080
+
+# Run as non-root
+RUN adduser -D -s /bin/sh appuser
+USER appuser
+
+ENTRYPOINT ["/app/server"]

go-backend/cmd/server/main.go

@@ -0,0 +1,107 @@
+// Command server starts the Control Center Go backend API server.
+package main
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"net/http"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/config"
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/db"
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/handler"
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/router"
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/store"
+)
+
+func main() {
+	// ── Configuration ──────────────────────────────────────────────────────
+	cfg := config.Load()
+
+	// ── Logging ────────────────────────────────────────────────────────────
+	logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		Level: parseLogLevel(cfg.LogLevel),
+	}))
+	slog.SetDefault(logger)
+
+	// ── Database (optional until CUB-120 schema is ready) ──────────────────
+	var pool *db.Pool
+	if cfg.DatabaseURL != "" {
+		var err error
+		pool, err = db.New(cfg.DatabaseURL)
+		if err != nil {
+			slog.Warn("database connection failed; running without DB", "error", err)
+		}
+	}
+
+	// ── Stores (in-memory for now; PostgreSQL after CUB-120) ────────────────
+	agentStore := store.NewAgentStore()
+	sessionStore := store.NewSessionStore()
+	taskStore := store.NewTaskStore()
+	projectStore := store.NewProjectStore()
+
+	// ── HTTP handler ───────────────────────────────────────────────────────
+	h := handler.NewHandler(agentStore, sessionStore, taskStore, projectStore)
+
+	// ── Router ─────────────────────────────────────────────────────────────
+	r := router.New(&router.Dependencies{
+		Handler:    h,
+		DB:         pool,
+		CORSOrigin: cfg.CORSOrigin,
+	})
+
+	// ── Server ─────────────────────────────────────────────────────────────
+	srv := &http.Server{
+		Addr:         fmt.Sprintf(":%d", cfg.Port),
+		Handler:      r,
+		ReadTimeout:  10 * time.Second,
+		WriteTimeout: 15 * time.Second,
+		IdleTimeout:  60 * time.Second,
+	}
+
+	// Graceful shutdown
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+
+	go func() {
+		slog.Info("server starting", "port", cfg.Port, "env", cfg.Environment)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			slog.Error("server failed", "error", err)
+			os.Exit(1)
+		}
+	}()
+
+	<-quit
+	slog.Info("shutting down server...")
+
+	ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
+	defer cancel()
+
+	if err := srv.Shutdown(ctx); err != nil {
+		slog.Error("server forced to shutdown", "error", err)
+		os.Exit(1)
+	}
+
+	if pool != nil {
+		pool.Close()
+	}
+
+	slog.Info("server exited cleanly")
+}
+
+func parseLogLevel(level string) slog.Level {
+	switch level {
+	case "debug":
+		return slog.LevelDebug
+	case "warn":
+		return slog.LevelWarn
+	case "error":
+		return slog.LevelError
+	default:
+		return slog.LevelInfo
+	}
+}

go-backend/go.mod

@@ -0,0 +1,26 @@
+module code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend
+
+go 1.23
+
+require (
+	github.com/go-chi/chi/v5 v5.2.0
+	github.com/go-chi/cors v1.2.1
+	github.com/go-playground/validator/v10 v10.24.0
+	github.com/google/uuid v1.6.0
+	github.com/jackc/pgx/v5 v5.7.2
+)
+
+require (
+	github.com/gabriel-vasile/mimetype v1.4.8 // indirect
+	github.com/go-playground/locales v0.14.1 // indirect
+	github.com/go-playground/universal-translator v0.18.1 // indirect
+	github.com/jackc/pgpassfile v1.0.0 // indirect
+	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/leodido/go-urn v1.4.0 // indirect
+	golang.org/x/crypto v0.32.0 // indirect
+	golang.org/x/net v0.34.0 // indirect
+	golang.org/x/sync v0.10.0 // indirect
+	golang.org/x/sys v0.29.0 // indirect
+	golang.org/x/text v0.21.0 // indirect
+)

go-backend/go.sum

@@ -0,0 +1,50 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gabriel-vasile/mimetype v1.4.8 h1:FfZ3gj38NjllZIeJAmMhr+qKL8Wu+nOoI3GqacKw1NM=
+github.com/gabriel-vasile/mimetype v1.4.8/go.mod h1:ByKUIKGjh1ODkGM1asKUbQZOLGrPjydw3hYPU2YU9t8=
+github.com/go-chi/chi/v5 v5.2.0 h1:Aj1EtB0qR2Rdo2dG4O94RIU35w2lvQSj6BRA4+qwFL0=
+github.com/go-chi/chi/v5 v5.2.0/go.mod h1:DslCQbL2OYiznFReuXYUmQ2hGd1aDpCnlMNITLSKoi8=
+github.com/go-chi/cors v1.2.1 h1:xEC8UT3Rlp2QuWNEr4Fs/c2EAGVKBwy/1vHx3bppil4=
+github.com/go-chi/cors v1.2.1/go.mod h1:sSbTewc+6wYHBBCW7ytsFSn836hqM7JxpglAy2Vzc58=
+github.com/go-playground/assert/v2 v2.2.0 h1:JvknZsQTYeFEAhQwI4qEt9cyV5ONwRHC+lYKSsYSR8s=
+github.com/go-playground/assert/v2 v2.2.0/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.14.1 h1:EWaQ/wswjilfKLTECiXz7Rh+3BjFhfDFKv/oXslEjJA=
+github.com/go-playground/locales v0.14.1/go.mod h1:hxrqLVvrK65+Rwrd5Fc6F2O76J/NuW9t0sjnWqG1slY=
+github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJnYK9S473LQFuzCbDbfSFY=
+github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
+github.com/go-playground/validator/v10 v10.24.0 h1:KHQckvo8G6hlWnrPX4NJJ+aBfWNAE/HH+qdL2cBpCmg=
+github.com/go-playground/validator/v10 v10.24.0/go.mod h1:GGzBIJMuE98Ic/kJsBXbz1x/7cByt++cQ+YOuDM5wus=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
+github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
+github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761/go.mod h1:5TJZWKEWniPve33vlWYSoGYefn3gLQRzjfDlhSJ9ZKM=
+github.com/jackc/pgx/v5 v5.7.2 h1:mLoDLV6sonKlvjIEsV56SkWNCnuNv531l94GaIzO+XI=
+github.com/jackc/pgx/v5 v5.7.2/go.mod h1:ncY89UGWxg82EykZUwSpUKEfccBGGYq1xjrOpsbsfGQ=
+github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
+github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/leodido/go-urn v1.4.0 h1:WT9HwE9SGECu3lg4d/dIA+jxlljEa1/ffXKmRjqdmIQ=
+github.com/leodido/go-urn v1.4.0/go.mod h1:bvxc+MVxLKB4z00jd1z+Dvzr47oO32F/QSNjSBOlFxI=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
+github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+golang.org/x/crypto v0.32.0 h1:euUpcYgM8WcP71gNpTqQCn6rC2t6ULUPiOzfWaXVVfc=
+golang.org/x/crypto v0.32.0/go.mod h1:ZnnJkOaASj8g0AjIduWNlq2NRxL0PlBrbKVyZ6V/Ugc=
+golang.org/x/net v0.34.0 h1:Mb7Mrk043xzHgnRM88suvJFwzVrRfHEHJEl5/71CKw0=
+golang.org/x/net v0.34.0/go.mod h1:di0qlW3YNM5oh6GqDGQr92MyTozJPmybPK4Ev/Gm31k=
+golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.29.0 h1:TPYlXGxvx1MGTn2GiZDhnjPA9wZzZeGKHHmKhHYvgaU=
+golang.org/x/sys v0.29.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
+golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

go-backend/internal/config/config.go

@@ -0,0 +1,45 @@
+// Package config provides application configuration loaded from environment
+// variables with sensible defaults for local development.
+package config
+
+import (
+	"os"
+	"strconv"
+)
+
+// Config holds all application configuration.
+type Config struct {
+	Port         int
+	DatabaseURL  string
+	CORSOrigin   string
+	LogLevel     string
+	Environment  string
+}
+
+// Load reads configuration from environment variables, applying defaults where
+// values are not set. All secrets come from the environment — nothing is hardcoded.
+func Load() *Config {
+	return &Config{
+		Port:        getEnvInt("PORT", 8080),
+		DatabaseURL: getEnv("DATABASE_URL", "postgres://controlcenter:controlcenter@localhost:5432/controlcenter?sslmode=disable"),
+		CORSOrigin:  getEnv("CORS_ORIGIN", "*"),
+		LogLevel:    getEnv("LOG_LEVEL", "info"),
+		Environment: getEnv("ENVIRONMENT", "development"),
+	}
+}
+
+func getEnv(key, fallback string) string {
+	if v := os.Getenv(key); v != "" {
+		return v
+	}
+	return fallback
+}
+
+func getEnvInt(key string, fallback int) int {
+	if v := os.Getenv(key); v != "" {
+		if i, err := strconv.Atoi(v); err == nil {
+			return i
+		}
+	}
+	return fallback
+}

go-backend/internal/db/db.go

@@ -0,0 +1,62 @@
+// Package db provides PostgreSQL connection management using pgx.
+package db
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+// Pool wraps a pgx connection pool with lifecycle helpers.
+type Pool struct {
+	*pgxpool.Pool
+}
+
+// New creates a connection pool from a PostgreSQL DSN.
+func New(dsn string) (*Pool, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+
+	cfg, err := pgxpool.ParseConfig(dsn)
+	if err != nil {
+		return nil, fmt.Errorf("parse pgx config: %w", err)
+	}
+
+	// Sensible defaults
+	cfg.MaxConns = 20
+	cfg.MinConns = 2
+	cfg.MaxConnLifetime = 30 * time.Minute
+	cfg.MaxConnIdleTime = 10 * time.Minute
+	cfg.HealthCheckPeriod = 5 * time.Second
+
+	pool, err := pgxpool.NewWithConfig(ctx, cfg)
+	if err != nil {
+		return nil, fmt.Errorf("create pgx pool: %w", err)
+	}
+
+	if err := pool.Ping(ctx); err != nil {
+		pool.Close()
+		return nil, fmt.Errorf("ping database: %w", err)
+	}
+
+	slog.Info("database connected", "pool", cfg.ConnConfig.Database)
+	return &Pool{Pool: pool}, nil
+}
+
+// Close shuts down the pool gracefully.
+func (p *Pool) Close() {
+	if p.Pool != nil {
+		p.Pool.Close()
+		slog.Info("database pool closed")
+	}
+}
+
+// Health returns nil if the database is reachable.
+func (p *Pool) Health(ctx context.Context) error {
+	ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
+	defer cancel()
+	return p.Ping(ctx)
+}

go-backend/internal/handler/agent.go

@@ -0,0 +1,158 @@
+// Package handler contains HTTP handlers for the Control Center API.
+// Each handler is a method on a Handler struct that receives its
+// dependencies (stores) through dependency injection.
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"time"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/store"
+	"github.com/go-chi/chi/v5"
+	"github.com/go-playground/validator/v10"
+)
+
+// Handler groups all route handlers and their dependencies.
+type Handler struct {
+	AgentStore   *store.AgentStore
+	SessionStore *store.SessionStore
+	TaskStore    *store.TaskStore
+	ProjectStore *store.ProjectStore
+	validate     *validator.Validate
+}
+
+// NewHandler returns a fully wired Handler.
+func NewHandler(
+	as *store.AgentStore,
+	ss *store.SessionStore,
+	ts *store.TaskStore,
+	ps *store.ProjectStore,
+) *Handler {
+	v := validator.New()
+	v.RegisterValidation("agentStatus", validateAgentStatus)
+	return &Handler{
+		AgentStore:   as,
+		SessionStore: ss,
+		TaskStore:    ts,
+		ProjectStore: ps,
+		validate:     v,
+	}
+}
+
+// ─── Agent Handlers ────────────────────────────────────────────────────────────
+
+// ListAgents handles GET /api/agents.
+func (h *Handler) ListAgents(w http.ResponseWriter, r *http.Request) {
+	statusFilter := models.AgentStatus(r.URL.Query().Get("status"))
+	allAgents := h.AgentStore.List(statusFilter)
+
+	page, pageSize := parsePagination(r)
+	start, end := paginateSlice(len(allAgents), page, pageSize)
+
+	pageSlice := allAgents[start:end]
+	writeJSON(w, http.StatusOK, models.PaginatedResponse{
+		Data:       pageSlice,
+		TotalCount: h.AgentStore.Count(),
+		Page:       page,
+		PageSize:   pageSize,
+		HasMore:    end < len(allAgents),
+	})
+}
+
+// GetAgent handles GET /api/agents/{id}.
+func (h *Handler) GetAgent(w http.ResponseWriter, r *http.Request) {
+	id := chi.URLParam(r, "id")
+	agent, ok := h.AgentStore.Get(id)
+	if !ok {
+		writeJSON(w, http.StatusNotFound, models.ErrorResponse{Error: "agent not found"})
+		return
+	}
+	writeJSON(w, http.StatusOK, agent)
+}
+
+// CreateAgent handles POST /api/agents.
+func (h *Handler) CreateAgent(w http.ResponseWriter, r *http.Request) {
+	var req models.CreateAgentRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeJSON(w, http.StatusBadRequest, models.ErrorResponse{Error: "invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		writeJSON(w, http.StatusUnprocessableEntity, models.ErrorResponse{
+			Error:   "validation failed",
+			Details: validationErrors(err),
+		})
+		return
+	}
+
+	agent := models.AgentCardData{
+		ID:          req.ID,
+		DisplayName: req.DisplayName,
+		Role:        req.Role,
+		Status:      req.Status,
+		CurrentTask: req.CurrentTask,
+		SessionKey:  req.SessionKey,
+		Channel:     req.Channel,
+		LastActivity: time.Now().UTC().Format(time.RFC3339),
+	}
+
+	if ok := h.AgentStore.Create(agent); !ok {
+		writeJSON(w, http.StatusConflict, models.ErrorResponse{Error: "agent with this ID already exists"})
+		return
+	}
+	writeJSON(w, http.StatusCreated, agent)
+}
+
+// UpdateAgent handles PUT /api/agents/{id}.
+func (h *Handler) UpdateAgent(w http.ResponseWriter, r *http.Request) {
+	id := chi.URLParam(r, "id")
+
+	var req models.UpdateAgentRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeJSON(w, http.StatusBadRequest, models.ErrorResponse{Error: "invalid request body"})
+		return
+	}
+
+	if err := h.validate.Struct(req); err != nil {
+		writeJSON(w, http.StatusUnprocessableEntity, models.ErrorResponse{
+			Error:   "validation failed",
+			Details: validationErrors(err),
+		})
+		return
+	}
+
+	agent, ok := h.AgentStore.Update(id, req)
+	if !ok {
+		writeJSON(w, http.StatusNotFound, models.ErrorResponse{Error: "agent not found"})
+		return
+	}
+	writeJSON(w, http.StatusOK, agent)
+}
+
+// DeleteAgent handles DELETE /api/agents/{id}.
+func (h *Handler) DeleteAgent(w http.ResponseWriter, r *http.Request) {
+	id := chi.URLParam(r, "id")
+	if ok := h.AgentStore.Delete(id); !ok {
+		writeJSON(w, http.StatusNotFound, models.ErrorResponse{Error: "agent not found"})
+		return
+	}
+	w.WriteHeader(http.StatusNoContent)
+}
+
+// AgentHistory handles GET /api/agents/{id}/history.
+func (h *Handler) AgentHistory(w http.ResponseWriter, r *http.Request) {
+	id := chi.URLParam(r, "id")
+	if _, ok := h.AgentStore.Get(id); !ok {
+		writeJSON(w, http.StatusNotFound, models.ErrorResponse{Error: "agent not found"})
+		return
+	}
+
+	history := h.AgentStore.History(id)
+	if history == nil {
+		history = []models.AgentStatusHistoryEntry{}
+	}
+	writeJSON(w, http.StatusOK, history)
+}

go-backend/internal/handler/handler_test.go

@@ -0,0 +1,369 @@
+package handler
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/store"
+	"github.com/go-chi/chi/v5"
+)
+
+// testHandler creates a Handler wired to fresh in-memory stores for testing.
+func testHandler(t *testing.T) *Handler {
+	t.Helper()
+	return NewHandler(
+		store.NewAgentStore(),
+		store.NewSessionStore(),
+		store.NewTaskStore(),
+		store.NewProjectStore(),
+	)
+}
+
+// serveChi creates a chi.Mux with the standard routes registered, then
+// serves a request against it. Returns the recorded response.
+func serveChi(h *Handler, method, path, body string) *httptest.ResponseRecorder {
+	w := httptest.NewRecorder()
+	req := httptest.NewRequest(method, path, strings.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+
+	r := chi.NewRouter()
+	r.Route("/api", func(api chi.Router) {
+		api.Route("/agents", func(agents chi.Router) {
+			agents.Get("/", h.ListAgents)
+			agents.Post("/", h.CreateAgent)
+			agents.Get("/{id}", h.GetAgent)
+			agents.Put("/{id}", h.UpdateAgent)
+			agents.Delete("/{id}", h.DeleteAgent)
+			agents.Get("/{id}/history", h.AgentHistory)
+		})
+		api.Get("/sessions", h.ListSessions)
+		api.Get("/tasks", h.ListTasks)
+		api.Get("/projects", h.ListProjects)
+	})
+	r.ServeHTTP(w, req)
+	return w
+}
+
+func parseBody(t *testing.T, w *httptest.ResponseRecorder) map[string]any {
+	t.Helper()
+	var body map[string]any
+	if err := json.NewDecoder(w.Result().Body).Decode(&body); err != nil {
+		t.Fatalf("failed to decode body: %v", err)
+	}
+	return body
+}
+
+func parseAgent(t *testing.T, w *httptest.ResponseRecorder) models.AgentCardData {
+	t.Helper()
+	var a models.AgentCardData
+	if err := json.NewDecoder(w.Result().Body).Decode(&a); err != nil {
+		t.Fatalf("failed to decode agent: %v", err)
+	}
+	return a
+}
+
+func parsePaginated(t *testing.T, w *httptest.ResponseRecorder) models.PaginatedResponse {
+	t.Helper()
+	var pr models.PaginatedResponse
+	if err := json.NewDecoder(w.Result().Body).Decode(&pr); err != nil {
+		t.Fatalf("failed to decode paginated response: %v", err)
+	}
+	return pr
+}
+
+// ─── Agent Tests ───────────────────────────────────────────────────────────────
+
+func TestCreateAgent_Success(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "POST", "/api/agents", `{
+		"id": "dex",
+		"displayName": "Dex",
+		"role": "Backend Dev",
+		"status": "idle",
+		"sessionKey": "sess-1",
+		"channel": "discord"
+	}`)
+
+	if w.Code != http.StatusCreated {
+		t.Fatalf("expected 201, got %d: %s", w.Code, w.Body.String())
+	}
+
+	a := parseAgent(t, w)
+	if a.ID != "dex" {
+		t.Errorf("expected id=dax, got %s", a.ID)
+	}
+	if a.Status != models.AgentStatusIdle {
+		t.Errorf("expected status=idle, got %s", a.Status)
+	}
+}
+
+func TestCreateAgent_Duplicate(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"otto","displayName":"Otto","role":"Orchestrator","status":"active","sessionKey":"s1","channel":"discord"}`)
+	w := serveChi(h, "POST", "/api/agents", `{"id":"otto","displayName":"Otto","role":"Orchestrator","status":"active","sessionKey":"s2","channel":"discord"}`)
+
+	if w.Code != http.StatusConflict {
+		t.Fatalf("expected 409, got %d", w.Code)
+	}
+}
+
+func TestCreateAgent_Validation(t *testing.T) {
+	h := testHandler(t)
+	// Missing displayName
+	w := serveChi(h, "POST", "/api/agents", `{"id":"dex","status":"idle","sessionKey":"s1","channel":"discord"}`)
+	if w.Code != http.StatusUnprocessableEntity {
+		t.Fatalf("expected 422, got %d", w.Code)
+	}
+}
+
+func TestCreateAgent_InvalidStatus(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "POST", "/api/agents", `{"id":"dex","displayName":"Dex","role":"Dev","status":"flying","sessionKey":"s1","channel":"discord"}`)
+	if w.Code != http.StatusUnprocessableEntity {
+		t.Fatalf("expected 422 for invalid status, got %d", w.Code)
+	}
+}
+
+func TestGetAgent_NotFound(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "GET", "/api/agents/nonexistent", "")
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected 404, got %d", w.Code)
+	}
+}
+
+func TestGetAgent_Success(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"pip","displayName":"Pip","role":"Edge Dev","status":"idle","sessionKey":"s1","channel":"discord"}`)
+	w := serveChi(h, "GET", "/api/agents/pip", "")
+
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+	a := parseAgent(t, w)
+	if a.DisplayName != "Pip" {
+		t.Errorf("expected Pip, got %s", a.DisplayName)
+	}
+}
+
+func TestListAgents(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"a1","displayName":"Alpha","role":"Tester","status":"idle","sessionKey":"s1","channel":"discord"}`)
+	serveChi(h, "POST", "/api/agents", `{"id":"a2","displayName":"Beta","role":"Tester","status":"active","sessionKey":"s2","channel":"discord"}`)
+
+	w := serveChi(h, "GET", "/api/agents", "")
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+
+	pr := parsePaginated(t, w)
+	if pr.TotalCount != 2 {
+		t.Errorf("expected totalCount=2, got %d", pr.TotalCount)
+	}
+}
+
+func TestListAgents_FilterByStatus(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"a1","displayName":"Alpha","role":"Tester","status":"idle","sessionKey":"s1","channel":"discord"}`)
+	serveChi(h, "POST", "/api/agents", `{"id":"a2","displayName":"Beta","role":"Tester","status":"active","sessionKey":"s2","channel":"discord"}`)
+
+	w := serveChi(h, "GET", "/api/agents?status=active", "")
+	pr := parsePaginated(t, w)
+	if pr.TotalCount != 2 {
+		t.Errorf("expected totalCount=2 (unfiltered), got %d", pr.TotalCount)
+	}
+}
+
+func TestUpdateAgent(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"hex","displayName":"Hex","role":"DB Specialist","status":"idle","sessionKey":"s1","channel":"discord"}`)
+
+	w := serveChi(h, "PUT", "/api/agents/hex", `{"status":"thinking","currentTask":"schema review"}`)
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d: %s", w.Code, w.Body.String())
+	}
+
+	a := parseAgent(t, w)
+	if a.Status != models.AgentStatusThinking {
+		t.Errorf("expected status=thinking, got %s", a.Status)
+	}
+	if a.CurrentTask == nil || *a.CurrentTask != "schema review" {
+		t.Errorf("expected currentTask=schema review")
+	}
+}
+
+func TestUpdateAgent_NotFound(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "PUT", "/api/agents/nope", `{"status":"idle"}`)
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected 404, got %d", w.Code)
+	}
+}
+
+func TestDeleteAgent(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"temp","displayName":"Temp","role":"Temp","status":"idle","sessionKey":"s1","channel":"discord"}`)
+
+	w := serveChi(h, "DELETE", "/api/agents/temp", "")
+	if w.Code != http.StatusNoContent {
+		t.Fatalf("expected 204, got %d", w.Code)
+	}
+
+	// Verify gone
+	w2 := serveChi(h, "GET", "/api/agents/temp", "")
+	if w2.Code != http.StatusNotFound {
+		t.Fatalf("expected 404 after delete, got %d", w2.Code)
+	}
+}
+
+func TestAgentHistory(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"nano","displayName":"Nano","role":"Firmware","status":"idle","sessionKey":"s1","channel":"discord"}`)
+	serveChi(h, "PUT", "/api/agents/nano", `{"status":"thinking","currentTask":"mqtt payload"}`)
+
+	w := serveChi(h, "GET", "/api/agents/nano/history", "")
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+
+	var entries []models.AgentStatusHistoryEntry
+	json.NewDecoder(w.Result().Body).Decode(&entries)
+	if len(entries) < 2 {
+		t.Errorf("expected at least 2 history entries, got %d", len(entries))
+	}
+	// Newest first — first entry should be "thinking"
+	if entries[0].Status != models.AgentStatusThinking {
+		t.Errorf("expected newest entry status=thinking, got %s", entries[0].Status)
+	}
+}
+
+func TestAgentHistory_NotFound(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "GET", "/api/agents/ghost/history", "")
+	if w.Code != http.StatusNotFound {
+		t.Fatalf("expected 404, got %d", w.Code)
+	}
+}
+
+// ─── Session Tests ─────────────────────────────────────────────────────────════
+
+func TestListSessions_Empty(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "GET", "/api/sessions", "")
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+	pr := parsePaginated(t, w)
+	if pr.TotalCount != 0 {
+		t.Errorf("expected 0 sessions, got %d", pr.TotalCount)
+	}
+}
+
+func TestListSessions_WithData(t *testing.T) {
+	h := testHandler(t)
+	h.SessionStore.Create(models.Session{
+		SessionKey: "sess-1",
+		AgentID:    "dex",
+		Channel:    "discord",
+		Status:     "running",
+		Model:      "deepseek-v4",
+	})
+	h.SessionStore.Create(models.Session{
+		SessionKey: "sess-2",
+		AgentID:    "otto",
+		Channel:    "discord",
+		Status:     "done",
+		Model:      "deepseek-v4",
+	})
+
+	w := serveChi(h, "GET", "/api/sessions", "")
+	pr := parsePaginated(t, w)
+	if pr.TotalCount != 2 {
+		t.Errorf("expected totalCount=2, got %d", pr.TotalCount)
+	}
+}
+
+// ─── Task Tests ────────────────────────────────────────────────────────────────
+
+func TestListTasks_Empty(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "GET", "/api/tasks", "")
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+}
+
+func TestListTasks_WithData(t *testing.T) {
+	h := testHandler(t)
+	h.TaskStore.Create(models.Task{
+		AgentID: "dex",
+		Title:   "Implement CRUD API",
+		Status:  models.TaskStatusRunning,
+	})
+
+	w := serveChi(h, "GET", "/api/tasks", "")
+	pr := parsePaginated(t, w)
+	if pr.TotalCount != 1 {
+		t.Errorf("expected totalCount=1, got %d", pr.TotalCount)
+	}
+}
+
+// ─── Project Tests ─────────────────────────────────────────────────────────────
+
+func TestListProjects_Empty(t *testing.T) {
+	h := testHandler(t)
+	w := serveChi(h, "GET", "/api/projects", "")
+	if w.Code != http.StatusOK {
+		t.Fatalf("expected 200, got %d", w.Code)
+	}
+}
+
+func TestListProjects_WithData(t *testing.T) {
+	h := testHandler(t)
+	h.ProjectStore.Create(models.Project{
+		Name:        "Extrudex",
+		Description: "Filament inventory system",
+		Status:      models.ProjectStatusActive,
+	})
+
+	w := serveChi(h, "GET", "/api/projects", "")
+	pr := parsePaginated(t, w)
+	if pr.TotalCount != 1 {
+		t.Errorf("expected totalCount=1, got %d", pr.TotalCount)
+	}
+}
+
+// ─── Pagination Tests ─────────────────────────────────────────────────────────
+
+func TestPagination_PageOutOfRange(t *testing.T) {
+	h := testHandler(t)
+	serveChi(h, "POST", "/api/agents", `{"id":"a1","displayName":"A1","role":"T","status":"idle","sessionKey":"s1","channel":"discord"}`)
+
+	w := serveChi(h, "GET", "/api/agents?page=99", "")
+	pr := parsePaginated(t, w)
+	if len(pr.Data.([]any)) != 0 {
+		t.Errorf("expected empty page, got %d items", len(pr.Data.([]any)))
+	}
+	// HasMore=false because we're past all data — nothing more to fetch.
+	if pr.HasMore {
+		t.Error("expected HasMore=false when page is beyond data")
+	}
+}
+
+func TestPagination_PageSize(t *testing.T) {
+	h := testHandler(t)
+	for i := range 5 {
+		id := string(rune('a' + i))
+		serveChi(h, "POST", "/api/agents", `{"id":"`+string(id)+`","displayName":"`+string(id)+`","role":"T","status":"idle","sessionKey":"s1","channel":"discord"}`)
+	}
+
+	w := serveChi(h, "GET", "/api/agents?pageSize=2&page=2", "")
+	pr := parsePaginated(t, w)
+	if pr.PageSize != 2 {
+		t.Errorf("expected pageSize=2, got %d", pr.PageSize)
+	}
+}

go-backend/internal/handler/helpers.go

@@ -0,0 +1,106 @@
+package handler
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strconv"
+	"strings"
+
+	"github.com/go-playground/validator/v10"
+)
+
+// ─── Pagination ────────────────────────────────────────────────────────────────
+
+const (
+	defaultPage     = 1
+	defaultPageSize = 20
+	maxPageSize     = 100
+)
+
+// parsePagination extracts page and pageSize query params from the request.
+func parsePagination(r *http.Request) (page, pageSize int) {
+	page = defaultPage
+	pageSize = defaultPageSize
+
+	if p := r.URL.Query().Get("page"); p != "" {
+		if n, err := strconv.Atoi(p); err == nil && n > 0 {
+			page = n
+		}
+	}
+	if ps := r.URL.Query().Get("pageSize"); ps != "" {
+		if n, err := strconv.Atoi(ps); err == nil && n > 0 {
+			if n > maxPageSize {
+				n = maxPageSize
+			}
+			pageSize = n
+		}
+	}
+	return page, pageSize
+}
+
+// paginateSlice computes the start and end indexes for a page of `total` items.
+// Bounds are clamped to [0, total].
+func paginateSlice(total, page, pageSize int) (start, end int) {
+	start = (page - 1) * pageSize
+	if start > total {
+		start = total
+	}
+	end = start + pageSize
+	if end > total {
+		end = total
+	}
+	return start, end
+}
+
+// ─── JSON Helpers ─────────────────────────────────────────────────────────────
+
+// writeJSON marshals v as JSON and writes it to w with the given status code.
+func writeJSON(w http.ResponseWriter, status int, v any) {
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(status)
+	if v == nil {
+		return
+	}
+	if err := json.NewEncoder(w).Encode(v); err != nil {
+		http.Error(w, `{"error":"internal encoding error"}`, http.StatusInternalServerError)
+	}
+}
+
+// ─── Validation ───────────────────────────────────────────────────────────────
+
+// validationErrors converts a validator.ValidationErrors into a string map
+// suitable for the ErrorResponse details field.
+func validationErrors(err error) map[string]string {
+	details := make(map[string]string)
+	if verrs, ok := err.(validator.ValidationErrors); ok {
+		for _, fe := range verrs {
+			field := strings.ToLower(fe.Field())
+			details[field] = fieldError(fe)
+		}
+	}
+	return details
+}
+
+func fieldError(fe validator.FieldError) string {
+	switch fe.Tag() {
+	case "required":
+		return "this field is required"
+	case "min":
+		return fmt.Sprintf("must be at least %s characters", fe.Param())
+	case "max":
+		return fmt.Sprintf("must be at most %s characters", fe.Param())
+	default:
+		return fmt.Sprintf("failed validation: %s", fe.Tag())
+	}
+}
+
+// validateAgentStatus is a custom validator for AgentStatus values.
+func validateAgentStatus(fl validator.FieldLevel) bool {
+	if status, ok := fl.Field().Interface().(interface {
+		IsValid() bool
+	}); ok {
+		return status.IsValid()
+	}
+	return false
+}

go-backend/internal/handler/project.go

@@ -0,0 +1,28 @@
+package handler
+
+import (
+	"net/http"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+)
+
+// ─── Project Handlers ──────────────────────────────────────────────────────────
+
+// ListProjects handles GET /api/projects.
+func (h *Handler) ListProjects(w http.ResponseWriter, r *http.Request) {
+	projects := h.ProjectStore.List()
+	if projects == nil {
+		projects = []models.Project{}
+	}
+
+	page, pageSize := parsePagination(r)
+	start, end := paginateSlice(len(projects), page, pageSize)
+
+	writeJSON(w, http.StatusOK, models.PaginatedResponse{
+		Data:       projects[start:end],
+		TotalCount: h.ProjectStore.Count(),
+		Page:       page,
+		PageSize:   pageSize,
+		HasMore:    end < len(projects),
+	})
+}

go-backend/internal/handler/session.go

@@ -0,0 +1,28 @@
+package handler
+
+import (
+	"net/http"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+)
+
+// ─── Session Handlers ──────────────────────────────────────────────────────────
+
+// ListSessions handles GET /api/sessions.
+func (h *Handler) ListSessions(w http.ResponseWriter, r *http.Request) {
+	sessions := h.SessionStore.ListActive()
+	if sessions == nil {
+		sessions = []models.Session{}
+	}
+
+	page, pageSize := parsePagination(r)
+	start, end := paginateSlice(len(sessions), page, pageSize)
+
+	writeJSON(w, http.StatusOK, models.PaginatedResponse{
+		Data:       sessions[start:end],
+		TotalCount: h.SessionStore.Count(),
+		Page:       page,
+		PageSize:   pageSize,
+		HasMore:    end < len(sessions),
+	})
+}

go-backend/internal/handler/task.go

@@ -0,0 +1,28 @@
+package handler
+
+import (
+	"net/http"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+)
+
+// ─── Task Handlers ─────────────────────────────────────────────────────────────
+
+// ListTasks handles GET /api/tasks.
+func (h *Handler) ListTasks(w http.ResponseWriter, r *http.Request) {
+	tasks := h.TaskStore.ListRecent()
+	if tasks == nil {
+		tasks = []models.Task{}
+	}
+
+	page, pageSize := parsePagination(r)
+	start, end := paginateSlice(len(tasks), page, pageSize)
+
+	writeJSON(w, http.StatusOK, models.PaginatedResponse{
+		Data:       tasks[start:end],
+		TotalCount: h.TaskStore.Count(),
+		Page:       page,
+		PageSize:   pageSize,
+		HasMore:    end < len(tasks),
+	})
+}

go-backend/internal/models/models.go

@@ -0,0 +1,165 @@
+// Package models defines the domain types and API contracts for the
+// Control Center Go backend. These types map to the existing TypeScript
+// AgentCardData interface and extend it with persistence-focused types
+// for the new session, task, and project entities.
+//
+// All JSON field names use camelCase to match the existing frontend
+// contract established by the .NET backend.
+package models
+
+import "time"
+
+// ─── Agent Status ──────────────────────────────────────────────────────────────
+
+// AgentStatus represents an agent's operational status.
+// Maps to the frontend status values: active, idle, thinking, error.
+type AgentStatus string
+
+const (
+	AgentStatusActive   AgentStatus = "active"
+	AgentStatusIdle     AgentStatus = "idle"
+	AgentStatusThinking AgentStatus = "thinking"
+	AgentStatusError    AgentStatus = "error"
+)
+
+// IsValid reports whether s is a known agent status.
+func (s AgentStatus) IsValid() bool {
+	switch s {
+	case AgentStatusActive, AgentStatusIdle, AgentStatusThinking, AgentStatusError:
+		return true
+	default:
+		return false
+	}
+}
+
+// ─── Agent ─────────────────────────────────────────────────────────────────────
+
+// AgentCardData is the primary data shape consumed by the Command Hub frontend.
+// It matches the TypeScript AgentCardData interface exactly.
+type AgentCardData struct {
+	ID           string      `json:"id"`
+	DisplayName  string      `json:"displayName"`
+	Role         string      `json:"role"`
+	Status       AgentStatus `json:"status"`
+	CurrentTask  *string     `json:"currentTask,omitempty"`
+	TaskProgress *int        `json:"taskProgress,omitempty"`
+	TaskElapsed  *string     `json:"taskElapsed,omitempty"`
+	SessionKey   string      `json:"sessionKey"`
+	Channel      string      `json:"channel"`
+	LastActivity string      `json:"lastActivity"`
+	ErrorMessage *string     `json:"errorMessage,omitempty"`
+}
+
+// CreateAgentRequest is the payload for POST /api/agents.
+type CreateAgentRequest struct {
+	ID          string      `json:"id" validate:"required,min=2,max=64"`
+	DisplayName string      `json:"displayName" validate:"required,min=1,max=128"`
+	Role        string      `json:"role" validate:"required,min=1,max=256"`
+	Status      AgentStatus `json:"status" validate:"required,agentStatus"`
+	SessionKey  string      `json:"sessionKey" validate:"required,min=1"`
+	Channel     string      `json:"channel" validate:"required,min=1,max=32"`
+	CurrentTask *string     `json:"currentTask,omitempty"`
+}
+
+// UpdateAgentRequest is the payload for PUT /api/agents/{id}.
+type UpdateAgentRequest struct {
+	Status       *AgentStatus `json:"status,omitempty" validate:"omitempty,agentStatus"`
+	CurrentTask  *string      `json:"currentTask,omitempty"`
+	TaskProgress *int         `json:"taskProgress,omitempty" validate:"omitempty,min=0,max=100"`
+	TaskElapsed  *string      `json:"taskElapsed,omitempty"`
+	Channel      *string      `json:"channel,omitempty" validate:"omitempty,min=1,max=32"`
+	ErrorMessage *string      `json:"errorMessage,omitempty"`
+}
+
+// AgentStatusHistoryEntry represents a point-in-time status change for an agent.
+type AgentStatusHistoryEntry struct {
+	ID        string      `json:"id"`
+	AgentID   string      `json:"agentId"`
+	Status    AgentStatus `json:"status"`
+	Task      *string     `json:"task,omitempty"`
+	Timestamp string      `json:"timestamp"`
+}
+
+// ─── Session ───────────────────────────────────────────────────────────────────
+
+// Session represents an active agent session tracked by the system.
+type Session struct {
+	ID             string    `json:"id"`
+	SessionKey     string    `json:"sessionKey"`
+	AgentID        string    `json:"agentId"`
+	Channel        string    `json:"channel"`
+	Status         string    `json:"status"` // running, done, streaming, error
+	ContextTokens  int       `json:"contextTokens"`
+	TotalTokens    int       `json:"totalTokens"`
+	EstimatedCost  float64   `json:"estimatedCost"`
+	Model          string    `json:"model"`
+	StartedAt      time.Time `json:"startedAt"`
+	LastActivityAt time.Time `json:"lastActivityAt"`
+}
+
+// ─── Task ───────────────────────────────────────────────────────────────────────
+
+// TaskStatus represents the lifecycle state of a tracked task.
+type TaskStatus string
+
+const (
+	TaskStatusPending   TaskStatus = "pending"
+	TaskStatusRunning   TaskStatus = "running"
+	TaskStatusCompleted TaskStatus = "completed"
+	TaskStatusFailed    TaskStatus = "failed"
+)
+
+// Task represents a tracked task assigned to an agent.
+type Task struct {
+	ID          string     `json:"id"`
+	AgentID     string     `json:"agentId"`
+	Title       string     `json:"title"`
+	Description string     `json:"description"`
+	Status      TaskStatus `json:"status"`
+	Progress    *int       `json:"progress,omitempty"`
+	SessionKey  string     `json:"sessionKey"`
+	CreatedAt   time.Time  `json:"createdAt"`
+	UpdatedAt   time.Time  `json:"updatedAt"`
+}
+
+// ─── Project ────────────────────────────────────────────────────────────────────
+
+// ProjectStatus represents the lifecycle state of a project.
+type ProjectStatus string
+
+const (
+	ProjectStatusPlanned   ProjectStatus = "planned"
+	ProjectStatusActive    ProjectStatus = "active"
+	ProjectStatusPaused    ProjectStatus = "paused"
+	ProjectStatusCompleted ProjectStatus = "completed"
+)
+
+// Project represents a project tracked in the system.
+type Project struct {
+	ID          string        `json:"id"`
+	Name        string        `json:"name"`
+	Description string        `json:"description"`
+	Status      ProjectStatus `json:"status"`
+	AgentIDs    []string      `json:"agentIds"`
+	CreatedAt   time.Time     `json:"createdAt"`
+	UpdatedAt   time.Time     `json:"updatedAt"`
+}
+
+// ─── Pagination ────────────────────────────────────────────────────────────────
+
+// PaginatedResponse wraps a list response with pagination metadata.
+type PaginatedResponse struct {
+	Data       any  `json:"data"`
+	TotalCount int  `json:"totalCount"`
+	Page       int  `json:"page"`
+	PageSize   int  `json:"pageSize"`
+	HasMore    bool `json:"hasMore"`
+}
+
+// ─── Error ─────────────────────────────────────────────────────────────────────
+
+// ErrorResponse is the standard API error envelope.
+type ErrorResponse struct {
+	Error   string            `json:"error"`
+	Details map[string]string `json:"details,omitempty"`
+}

go-backend/internal/router/router.go

@@ -0,0 +1,84 @@
+// Package router configures the chi router with all routes, middleware,
+// and handler wiring for the Control Center API.
+package router
+
+import (
+	"net/http"
+	"time"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/db"
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/handler"
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/v5/middleware"
+	"github.com/go-chi/cors"
+)
+
+// Dependencies carries the handler and database pool into the router.
+type Dependencies struct {
+	Handler   *handler.Handler
+	DB        *db.Pool
+	CORSOrigin string
+}
+
+// New creates a fully-configured chi router with all API routes mounted.
+func New(deps *Dependencies) *chi.Mux {
+	r := chi.NewRouter()
+
+	// ── Global middleware ──────────────────────────────────────────────────
+	r.Use(middleware.RequestID)
+	r.Use(middleware.RealIP)
+	r.Use(middleware.Logger)
+	r.Use(middleware.Recoverer)
+	r.Use(middleware.Timeout(30 * time.Second))
+
+	// ── CORS ───────────────────────────────────────────────────────────────
+	corsOrigin := deps.CORSOrigin
+	if corsOrigin == "" {
+		corsOrigin = "*"
+	}
+	r.Use(cors.Handler(cors.Options{
+		AllowedOrigins:   []string{corsOrigin},
+		AllowedMethods:   []string{"GET", "POST", "PUT", "DELETE", "OPTIONS"},
+		AllowedHeaders:   []string{"Accept", "Authorization", "Content-Type"},
+		ExposedHeaders:   []string{"Link", "X-Total-Count"},
+		AllowCredentials: false,
+		MaxAge:           300,
+	}))
+
+	// ── Health check (with DB connectivity probe) ──────────────────────────
+	r.Get("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		status := "ok"
+		if deps.DB != nil {
+			if err := deps.DB.Health(r.Context()); err != nil {
+				w.WriteHeader(http.StatusServiceUnavailable)
+				status = "db_unhealthy"
+			}
+		}
+		w.Write([]byte(`{"status":"` + status + `"}`))
+	})
+
+	// ── API v1 routes ──────────────────────────────────────────────────────
+	r.Route("/api", func(api chi.Router) {
+		// Agents CRUD
+		api.Route("/agents", func(agents chi.Router) {
+			agents.Get("/", deps.Handler.ListAgents)       // GET /api/agents
+			agents.Post("/", deps.Handler.CreateAgent)      // POST /api/agents
+			agents.Get("/{id}", deps.Handler.GetAgent)       // GET /api/agents/{id}
+			agents.Put("/{id}", deps.Handler.UpdateAgent)    // PUT /api/agents/{id}
+			agents.Delete("/{id}", deps.Handler.DeleteAgent) // DELETE /api/agents/{id}
+			agents.Get("/{id}/history", deps.Handler.AgentHistory) // GET /api/agents/{id}/history
+		})
+
+		// Sessions
+		api.Get("/sessions", deps.Handler.ListSessions)
+
+		// Tasks
+		api.Get("/tasks", deps.Handler.ListTasks)
+
+		// Projects
+		api.Get("/projects", deps.Handler.ListProjects)
+	})
+
+	return r
+}

go-backend/internal/store/agent.go

@@ -0,0 +1,177 @@
+// Package store provides thread-safe in-memory data stores for the
+// Control Center API. These will be replaced with PostgreSQL-backed
+// implementations once CUB-120 (schema design) is complete.
+package store
+
+import (
+	"sort"
+	"sync"
+	"time"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+	"github.com/google/uuid"
+)
+
+// AgentStore provides thread-safe CRUD operations for agents.
+type AgentStore struct {
+	mu      sync.RWMutex
+	agents  map[string]models.AgentCardData
+	history map[string][]models.AgentStatusHistoryEntry // agentID -> history
+}
+
+// NewAgentStore returns an initialized AgentStore.
+func NewAgentStore() *AgentStore {
+	return &AgentStore{
+		agents:  make(map[string]models.AgentCardData),
+		history: make(map[string][]models.AgentStatusHistoryEntry),
+	}
+}
+
+// List returns all agents, optionally filtered by status.
+func (s *AgentStore) List(statusFilter models.AgentStatus) []models.AgentCardData {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	result := make([]models.AgentCardData, 0, len(s.agents))
+	for _, a := range s.agents {
+		if statusFilter != "" && a.Status != statusFilter {
+			continue
+		}
+		result = append(result, a)
+	}
+
+	// Sort by display name for consistent output.
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].DisplayName < result[j].DisplayName
+	})
+	return result
+}
+
+// Get returns a single agent by ID, or false if not found.
+func (s *AgentStore) Get(id string) (models.AgentCardData, bool) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	a, ok := s.agents[id]
+	return a, ok
+}
+
+// Create inserts a new agent. Returns false if the ID already exists.
+func (s *AgentStore) Create(a models.AgentCardData) bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if _, exists := s.agents[a.ID]; exists {
+		return false
+	}
+	if a.LastActivity == "" {
+		a.LastActivity = time.Now().UTC().Format(time.RFC3339)
+	}
+	s.agents[a.ID] = a
+
+	// Record initial history entry.
+	s.appendHistoryLocked(a.ID, models.AgentStatusHistoryEntry{
+		ID:        uuid.New().String(),
+		AgentID:   a.ID,
+		Status:    a.Status,
+		Task:      a.CurrentTask,
+		Timestamp: a.LastActivity,
+	})
+	return true
+}
+
+// Update applies partial updates to an agent. Returns the updated agent or false if not found.
+func (s *AgentStore) Update(id string, req models.UpdateAgentRequest) (models.AgentCardData, bool) {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	a, ok := s.agents[id]
+	if !ok {
+		return models.AgentCardData{}, false
+	}
+
+	prevStatus := a.Status
+	prevTask := a.CurrentTask
+
+	if req.Status != nil {
+		a.Status = *req.Status
+	}
+	if req.CurrentTask != nil {
+		a.CurrentTask = req.CurrentTask
+	}
+	if req.TaskProgress != nil {
+		a.TaskProgress = req.TaskProgress
+	}
+	if req.TaskElapsed != nil {
+		a.TaskElapsed = req.TaskElapsed
+	}
+	if req.Channel != nil {
+		a.Channel = *req.Channel
+	}
+	if req.ErrorMessage != nil {
+		a.ErrorMessage = req.ErrorMessage
+	}
+	a.LastActivity = time.Now().UTC().Format(time.RFC3339)
+	s.agents[id] = a
+
+	// Record history entry if status or task changed.
+	if (req.Status != nil && *req.Status != prevStatus) || (req.CurrentTask != nil && prevTask == nil) ||
+		(req.CurrentTask != nil && prevTask != nil && *req.CurrentTask != *prevTask) {
+		status := a.Status
+		if req.Status != nil {
+			status = *req.Status
+		}
+		s.appendHistoryLocked(id, models.AgentStatusHistoryEntry{
+			ID:        uuid.New().String(),
+			AgentID:   id,
+			Status:    status,
+			Task:      a.CurrentTask,
+			Timestamp: a.LastActivity,
+		})
+	}
+
+	return a, true
+}
+
+// Delete removes an agent. Returns true if the agent existed.
+func (s *AgentStore) Delete(id string) bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	if _, ok := s.agents[id]; !ok {
+		return false
+	}
+	delete(s.agents, id)
+	delete(s.history, id)
+	return true
+}
+
+// History returns the status history for an agent, newest first.
+func (s *AgentStore) History(agentID string) []models.AgentStatusHistoryEntry {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	entries, ok := s.history[agentID]
+	if !ok {
+		return nil
+	}
+	// Return a defensive copy, sorted newest first (by index when timestamps tie).
+	result := make([]models.AgentStatusHistoryEntry, len(entries))
+	copy(result, entries)
+	sort.SliceStable(result, func(i, j int) bool {
+		if result[i].Timestamp == result[j].Timestamp {
+			return i > j // later index = newer when timestamps match
+		}
+		return result[i].Timestamp > result[j].Timestamp
+	})
+	return result
+}
+
+// Count returns the total number of agents.
+func (s *AgentStore) Count() int {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return len(s.agents)
+}
+
+// appendHistoryLocked adds a history entry. Caller must hold s.mu (write lock).
+func (s *AgentStore) appendHistoryLocked(agentID string, entry models.AgentStatusHistoryEntry) {
+	s.history[agentID] = append(s.history[agentID], entry)
+}

go-backend/internal/store/project.go

@@ -0,0 +1,67 @@
+package store
+
+import (
+	"sort"
+	"sync"
+	"time"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+	"github.com/google/uuid"
+)
+
+// ProjectStore provides thread-safe CRUD operations for projects.
+type ProjectStore struct {
+	mu       sync.RWMutex
+	projects map[string]models.Project
+}
+
+// NewProjectStore returns an initialized ProjectStore.
+func NewProjectStore() *ProjectStore {
+	return &ProjectStore{
+		projects: make(map[string]models.Project),
+	}
+}
+
+// List returns all projects ordered by name.
+func (s *ProjectStore) List() []models.Project {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	result := make([]models.Project, 0, len(s.projects))
+	for _, p := range s.projects {
+		result = append(result, p)
+	}
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].Name < result[j].Name
+	})
+	return result
+}
+
+// Create inserts a new project.
+func (s *ProjectStore) Create(p models.Project) models.Project {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if p.ID == "" {
+		p.ID = uuid.New().String()
+	}
+	now := time.Now().UTC()
+	if p.CreatedAt.IsZero() {
+		p.CreatedAt = now
+	}
+	if p.UpdatedAt.IsZero() {
+		p.UpdatedAt = now
+	}
+	if p.AgentIDs == nil {
+		p.AgentIDs = []string{}
+	}
+	s.projects[p.ID] = p
+	return p
+}
+
+// Count returns the total number of projects.
+func (s *ProjectStore) Count() int {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return len(s.projects)
+}

go-backend/internal/store/session.go

@@ -0,0 +1,80 @@
+package store
+
+import (
+	"sort"
+	"sync"
+	"time"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+	"github.com/google/uuid"
+)
+
+// SessionStore provides thread-safe CRUD operations for sessions.
+type SessionStore struct {
+	mu       sync.RWMutex
+	sessions map[string]models.Session // id -> session
+}
+
+// NewSessionStore returns an initialized SessionStore.
+func NewSessionStore() *SessionStore {
+	return &SessionStore{
+		sessions: make(map[string]models.Session),
+	}
+}
+
+// ListActive returns all sessions with status "running" or "streaming", newest first.
+func (s *SessionStore) ListActive() []models.Session {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	result := make([]models.Session, 0)
+	for _, sess := range s.sessions {
+		if sess.Status == "running" || sess.Status == "streaming" {
+			result = append(result, sess)
+		}
+	}
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].LastActivityAt.After(result[j].LastActivityAt)
+	})
+	return result
+}
+
+// Create inserts a new session.
+func (s *SessionStore) Create(sess models.Session) models.Session {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if sess.ID == "" {
+		sess.ID = uuid.New().String()
+	}
+	if sess.StartedAt.IsZero() {
+		sess.StartedAt = time.Now().UTC()
+	}
+	if sess.LastActivityAt.IsZero() {
+		sess.LastActivityAt = sess.StartedAt
+	}
+	s.sessions[sess.ID] = sess
+	return sess
+}
+
+// UpdateStatus updates the status and last-activity timestamp of a session.
+func (s *SessionStore) UpdateStatus(id, status string) bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	sess, ok := s.sessions[id]
+	if !ok {
+		return false
+	}
+	sess.Status = status
+	sess.LastActivityAt = time.Now().UTC()
+	s.sessions[id] = sess
+	return true
+}
+
+// Count returns the total number of sessions.
+func (s *SessionStore) Count() int {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return len(s.sessions)
+}

go-backend/internal/store/task.go

@@ -0,0 +1,64 @@
+package store
+
+import (
+	"sort"
+	"sync"
+	"time"
+
+	"code.cubecraftcreations.com/CubeCraft-Creations/Control-Center/go-backend/internal/models"
+	"github.com/google/uuid"
+)
+
+// TaskStore provides thread-safe CRUD operations for tasks.
+type TaskStore struct {
+	mu    sync.RWMutex
+	tasks map[string]models.Task
+}
+
+// NewTaskStore returns an initialized TaskStore.
+func NewTaskStore() *TaskStore {
+	return &TaskStore{
+		tasks: make(map[string]models.Task),
+	}
+}
+
+// ListRecent returns tasks ordered by updated_at descending (newest first).
+func (s *TaskStore) ListRecent() []models.Task {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+
+	result := make([]models.Task, 0, len(s.tasks))
+	for _, t := range s.tasks {
+		result = append(result, t)
+	}
+	sort.Slice(result, func(i, j int) bool {
+		return result[i].UpdatedAt.After(result[j].UpdatedAt)
+	})
+	return result
+}
+
+// Create inserts a new task.
+func (s *TaskStore) Create(t models.Task) models.Task {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+
+	if t.ID == "" {
+		t.ID = uuid.New().String()
+	}
+	now := time.Now().UTC()
+	if t.CreatedAt.IsZero() {
+		t.CreatedAt = now
+	}
+	if t.UpdatedAt.IsZero() {
+		t.UpdatedAt = now
+	}
+	s.tasks[t.ID] = t
+	return t
+}
+
+// Count returns the total number of tasks.
+func (s *TaskStore) Count() int {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return len(s.tasks)
+}