feat(CUB-58): Agent Status SignalR Service (Angular)

- Scaffold Angular 17 frontend with standalone components - Add @microsoft/signalr package dependency - Create AgentStatusService connecting to /hub endpoint - Auto-reconnect with progressive delays - Listens for AgentStatusChanged and BroadcastMessage - Logs all updates to console - Exposes statusUpdates$ and connected$ observables - onStatusUpdate() alias matching CUB-58 spec - Create AgentStatusUpdate interface (agentId, status, lastSeenAt) - Add APP_INITIALIZER provider to start connection on app boot - Register initializer in app.config.ts - Update .gitignore for frontend build artifacts
2026-04-26 07:21:47 +00:00
41 changed files with 10794 additions and 6246 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -3,3 +3,9 @@ obj/
 *.user
 *.suo
 .vs/
+
+# Frontend (Angular)
+frontend/node_modules/
+frontend/dist/
+frontend/.angular/
+frontend/*.log
--- a/frontend/.editorconfig
+++ b/frontend/.editorconfig
@@ -10,7 +10,6 @@ trim_trailing_whitespace = true

 [*.ts]
 quote_type = single
-ij_typescript_use_double_quotes = false

 [*.md]
 max_line_length = off
--- a/frontend/.gitignore
+++ b/frontend/.gitignore
@@ -26,7 +26,6 @@ yarn-error.log
 !.vscode/tasks.json
 !.vscode/launch.json
 !.vscode/extensions.json
-!.vscode/mcp.json
 .history/*

 # Miscellaneous
@@ -37,7 +36,6 @@ yarn-error.log
 /libpeerconnection.log
 testem.log
 /typings
-__screenshots__/

 # System files
 .DS_Store
--- a/frontend/.prettierrc
+++ b/frontend/.prettierrc
@@ -1,12 +0,0 @@
-{
-  "printWidth": 100,
-  "singleQuote": true,
-  "overrides": [
-    {
-      "files": "*.html",
-      "options": {
-        "parser": "angular"
-      }
-    }
-  ]
-}
--- a/frontend/.vscode/mcp.json
+++ b/frontend/.vscode/mcp.json
@@ -1,9 +0,0 @@
-{
-  // For more information, visit: https://angular.dev/ai/mcp
-  "servers": {
-    "angular-cli": {
-      "command": "npx",
-      "args": ["-y", "@angular/cli", "mcp"]
-    }
-  }
-}
--- a/frontend/.vscode/tasks.json
+++ b/frontend/.vscode/tasks.json
@@ -12,10 +12,10 @@
        "background": {
          "activeOnStart": true,
          "beginsPattern": {
-            "regexp": "Changes detected"
+            "regexp": "(.*?)"
          },
          "endsPattern": {
-            "regexp": "bundle generation (complete|failed)"
+            "regexp": "bundle generation complete"
          }
        }
      }
@@ -30,10 +30,10 @@
        "background": {
          "activeOnStart": true,
          "beginsPattern": {
-            "regexp": "Changes detected"
+            "regexp": "(.*?)"
          },
          "endsPattern": {
-            "regexp": "bundle generation (complete|failed)"
+            "regexp": "bundle generation complete"
          }
        }
      }
--- a/frontend/README.md
+++ b/frontend/README.md
@@ -1,59 +1,27 @@
 # Frontend

-This project was generated using [Angular CLI](https://github.com/angular/angular-cli) version 21.2.8.
+This project was generated with [Angular CLI](https://github.com/angular/angular-cli) version 17.3.17.

 ## Development server

-To start a local development server, run:
-
-```bash
-ng serve
-```
-
-Once the server is running, open your browser and navigate to `http://localhost:4200/`. The application will automatically reload whenever you modify any of the source files.
+Run `ng serve` for a dev server. Navigate to `http://localhost:4200/`. The application will automatically reload if you change any of the source files.

 ## Code scaffolding

-Angular CLI includes powerful code scaffolding tools. To generate a new component, run:
+Run `ng generate component component-name` to generate a new component. You can also use `ng generate directive|pipe|service|class|guard|interface|enum|module`.

-```bash
-ng generate component component-name
-```
+## Build

-For a complete list of available schematics (such as `components`, `directives`, or `pipes`), run:
-
-```bash
-ng generate --help
-```
-
-## Building
-
-To build the project run:
-
-```bash
-ng build
-```
-
-This will compile your project and store the build artifacts in the `dist/` directory. By default, the production build optimizes your application for performance and speed.
+Run `ng build` to build the project. The build artifacts will be stored in the `dist/` directory.

 ## Running unit tests

-To execute unit tests with the [Vitest](https://vitest.dev/) test runner, use the following command:
-
-```bash
-ng test
-```
+Run `ng test` to execute the unit tests via [Karma](https://karma-runner.github.io).

 ## Running end-to-end tests

-For end-to-end (e2e) testing, run:
+Run `ng e2e` to execute the end-to-end tests via a platform of your choice. To use this command, you need to first add a package that implements end-to-end testing capabilities.

-```bash
-ng e2e
-```
+## Further help

-Angular CLI does not come with an end-to-end testing framework by default. You can choose one that suits your needs.
-
-## Additional Resources
-
-For more information on using the Angular CLI, including detailed command references, visit the [Angular CLI Overview and Command Reference](https://angular.dev/tools/cli) page.
+To get more help on the Angular CLI use `ng help` or go check out the [Angular CLI Overview and Command Reference](https://angular.io/cli) page.
--- a/frontend/angular.json
+++ b/frontend/angular.json
@@ -1,16 +1,35 @@
 {
  "$schema": "./node_modules/@angular/cli/lib/config/schema.json",
  "version": 1,
-  "cli": {
-    "packageManager": "npm"
-  },
  "newProjectRoot": "projects",
  "projects": {
    "frontend": {
      "projectType": "application",
      "schematics": {
        "@schematics/angular:component": {
-          "style": "scss"
+          "style": "scss",
+          "skipTests": true
+        },
+        "@schematics/angular:class": {
+          "skipTests": true
+        },
+        "@schematics/angular:directive": {
+          "skipTests": true
+        },
+        "@schematics/angular:guard": {
+          "skipTests": true
+        },
+        "@schematics/angular:interceptor": {
+          "skipTests": true
+        },
+        "@schematics/angular:pipe": {
+          "skipTests": true
+        },
+        "@schematics/angular:resolver": {
+          "skipTests": true
+        },
+        "@schematics/angular:service": {
+          "skipTests": true
        }
      },
      "root": "",
@@ -18,33 +37,37 @@
      "prefix": "app",
      "architect": {
        "build": {
-          "builder": "@angular/build:application",
+          "builder": "@angular-devkit/build-angular:application",
          "options": {
+            "outputPath": "dist/frontend",
+            "index": "src/index.html",
            "browser": "src/main.ts",
+            "polyfills": [
+              "zone.js"
+            ],
            "tsConfig": "tsconfig.app.json",
            "inlineStyleLanguage": "scss",
            "assets": [
-              {
-                "glob": "**/*",
-                "input": "public"
-              }
+              "src/favicon.ico",
+              "src/assets"
            ],
            "styles": [
              "src/styles.scss"
-            ]
+            ],
+            "scripts": []
          },
          "configurations": {
            "production": {
              "budgets": [
                {
                  "type": "initial",
-                  "maximumWarning": "500kB",
-                  "maximumError": "1MB"
+                  "maximumWarning": "500kb",
+                  "maximumError": "1mb"
                },
                {
                  "type": "anyComponentStyle",
-                  "maximumWarning": "4kB",
-                  "maximumError": "8kB"
+                  "maximumWarning": "2kb",
+                  "maximumError": "4kb"
                }
              ],
              "outputHashing": "all"
@@ -58,7 +81,7 @@
          "defaultConfiguration": "production"
        },
        "serve": {
-          "builder": "@angular/build:dev-server",
+          "builder": "@angular-devkit/build-angular:dev-server",
          "configurations": {
            "production": {
              "buildTarget": "frontend:build:production"
@@ -69,8 +92,30 @@
          },
          "defaultConfiguration": "development"
        },
+        "extract-i18n": {
+          "builder": "@angular-devkit/build-angular:extract-i18n",
+          "options": {
+            "buildTarget": "frontend:build"
+          }
+        },
        "test": {
-          "builder": "@angular/build:unit-test"
+          "builder": "@angular-devkit/build-angular:karma",
+          "options": {
+            "polyfills": [
+              "zone.js",
+              "zone.js/testing"
+            ],
+            "tsConfig": "tsconfig.spec.json",
+            "inlineStyleLanguage": "scss",
+            "assets": [
+              "src/favicon.ico",
+              "src/assets"
+            ],
+            "styles": [
+              "src/styles.scss"
+            ],
+            "scripts": []
+          }
        }
      }
    }
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -9,27 +9,32 @@
    "test": "ng test"
  },
  "private": true,
-  "packageManager": "npm@11.11.0",
  "dependencies": {
-    "@angular/cdk": "^21.2.8",
-    "@angular/common": "^21.2.0",
-    "@angular/compiler": "^21.2.0",
-    "@angular/core": "^21.2.0",
-    "@angular/forms": "^21.2.0",
-    "@angular/material": "^21.2.8",
-    "@angular/platform-browser": "^21.2.0",
-    "@angular/router": "^21.2.0",
+    "@angular/animations": "^17.3.0",
+    "@angular/common": "^17.3.0",
+    "@angular/compiler": "^17.3.0",
+    "@angular/core": "^17.3.0",
+    "@angular/forms": "^17.3.0",
+    "@angular/material": "^17.3.10",
+    "@angular/platform-browser": "^17.3.0",
+    "@angular/platform-browser-dynamic": "^17.3.0",
+    "@angular/router": "^17.3.0",
+    "@microsoft/signalr": "^10.0.0",
    "rxjs": "~7.8.0",
-    "tslib": "^2.3.0"
+    "tslib": "^2.3.0",
+    "zone.js": "~0.14.3"
  },
  "devDependencies": {
-    "@angular/build": "^21.2.8",
-    "@angular/cli": "^21.2.8",
-    "@angular/compiler-cli": "^21.2.0",
-    "@vitest/browser-playwright": "^4.1.5",
-    "jsdom": "^28.0.0",
-    "prettier": "^3.8.1",
-    "typescript": "~5.9.2",
-    "vitest": "^4.0.8"
+    "@angular-devkit/build-angular": "^17.3.17",
+    "@angular/cli": "^17.3.17",
+    "@angular/compiler-cli": "^17.3.0",
+    "@types/jasmine": "~5.1.0",
+    "jasmine-core": "~5.1.0",
+    "karma": "~6.4.0",
+    "karma-chrome-launcher": "~3.2.0",
+    "karma-coverage": "~2.2.0",
+    "karma-jasmine": "~5.1.0",
+    "karma-jasmine-html-reporter": "~2.1.0",
+    "typescript": "~5.4.2"
  }
 }
--- a/frontend/src/app/app.component.html
+++ b/frontend/src/app/app.component.html
@@ -0,0 +1,336 @@
+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+<!-- * * * * * * * * * * * 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;
+  }
+
+  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;
+  }
+
+  .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(--french-violet);
+  }
+  .pill-group .pill:nth-child(6n + 3),
+  .pill-group .pill:nth-child(6n + 4),
+  .pill-group .pill:nth-child(6n + 5) {
+    --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)"
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+          />
+        </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: '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://twitter.com/angular"
+          aria-label="Twitter"
+          target="_blank"
+          rel="noopener"
+        >
+          <svg
+            width="24"
+            height="24"
+            viewBox="0 0 24 24"
+            fill="none"
+            xmlns="http://www.w3.org/2000/svg"
+            alt="Twitter"
+          >
+            <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.  * * * * * * * * * * * -->
+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
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+<!-- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * -->
+
+
+<router-outlet />
--- a/frontend/src/app/app.component.scss
+++ b/frontend/src/app/app.component.scss
--- a/frontend/src/app/app.component.ts
+++ b/frontend/src/app/app.component.ts
@@ -0,0 +1,13 @@
+import { Component } from '@angular/core';
+import { RouterOutlet } from '@angular/router';
+
+@Component({
+  selector: 'app-root',
+  standalone: true,
+  imports: [RouterOutlet],
+  templateUrl: './app.component.html',
+  styleUrl: './app.component.scss'
+})
+export class AppComponent {
+  title = 'frontend';
+}
--- a/frontend/src/app/app.config.ts
+++ b/frontend/src/app/app.config.ts
@@ -1,11 +1,12 @@
-import { ApplicationConfig, provideBrowserGlobalErrorListeners } from '@angular/core';
+import { ApplicationConfig } from '@angular/core';
 import { provideRouter } from '@angular/router';

 import { routes } from './app.routes';
+import { provideAgentStatusInitializer } from './services/agent-status-initializer';

 export const appConfig: ApplicationConfig = {
  providers: [
-    provideBrowserGlobalErrorListeners(),
-    provideRouter(routes)
+    provideRouter(routes),
+    ...provideAgentStatusInitializer(),
  ]
 };
--- a/frontend/src/app/app.html
+++ b/frontend/src/app/app.html
@@ -1,10 +0,0 @@
-<!-- Extrudex — Homepage (Main Hub) -->
-<main class="main-content">
-  <h1 class="sr-only">Extrudex Dashboard</h1>
-
-  <!-- Status Summary Bar — fleet-wide health at a glance -->
-  <app-dashboard-summary></app-dashboard-summary>
-
-  <!-- Filament Inventory — routed view -->
-  <router-outlet />
-</main>
--- a/frontend/src/app/app.routes.ts
+++ b/frontend/src/app/app.routes.ts
@@ -1,9 +1,3 @@
 import { Routes } from '@angular/router';
-import { FilamentTableComponent } from './components/filament-table/filament-table.component';

-export const routes: Routes = [
-  {
-    path: '',
-    component: FilamentTableComponent,
-  },
-];
+export const routes: Routes = [];
--- a/frontend/src/app/app.scss
+++ b/frontend/src/app/app.scss
@@ -1,27 +0,0 @@
-:host {
-  display: block;
-  min-height: 100vh;
-  background: #1a1a2e;
-  color: #e0e0e0;
-  font-family: 'Inter', 'Segoe UI', Roboto, sans-serif;
-}
-
-.main-content {
-  padding: 16px;
-
-  @media (min-width: 800px) {
-    padding: 24px;
-  }
-}
-
-.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;
-}
--- a/frontend/src/app/app.spec.ts
+++ b/frontend/src/app/app.spec.ts
@@ -1,23 +0,0 @@
-import { TestBed } from '@angular/core/testing';
-import { App } from './app';
-
-describe('App', () => {
-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [App],
-    }).compileComponents();
-  });
-
-  it('should create the app', () => {
-    const fixture = TestBed.createComponent(App);
-    const app = fixture.componentInstance;
-    expect(app).toBeTruthy();
-  });
-
-  it('should render title', async () => {
-    const fixture = TestBed.createComponent(App);
-    await fixture.whenStable();
-    const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.querySelector('h1')?.textContent).toContain('Extrudex Dashboard');
-  });
-});
--- a/frontend/src/app/app.ts
+++ b/frontend/src/app/app.ts
@@ -1,28 +0,0 @@
-import { Component, ViewChild } from '@angular/core';
-import { RouterOutlet } from '@angular/router';
-import { DashboardSummaryComponent } from './components/dashboard-summary/dashboard-summary.component';
-import { AgentSummary, SystemHealth } from './models/agent.model';
-
-@Component({
-  selector: 'app-root',
-  imports: [RouterOutlet, DashboardSummaryComponent],
-  templateUrl: './app.html',
-  styleUrl: './app.scss'
-})
-export class App {
-  @ViewChild(DashboardSummaryComponent) summaryComponent!: DashboardSummaryComponent;
-
-  /** Sample data for development — will be replaced by real service data */
-  readonly sampleSummary: AgentSummary = {
-    total: 7,
-    active: 4,
-    idle: 1,
-    thinking: 1,
-    error: 1,
-  };
-
-  readonly sampleHealth: SystemHealth = {
-    connected: true,
-    status: 'healthy',
-  };
-}
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.html
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.html
@@ -1,63 +0,0 @@
-<!-- Dashboard Summary Bar — Fleet-wide health at a glance -->
-<section class="dashboard-summary" role="status" aria-label="Dashboard summary">
-
-  <!-- System Health Indicator -->
-  <div class="summary-item health-indicator"
-       [class.healthy]="health().status === 'healthy'"
-       [class.degraded]="isDegraded()"
-       [class.down]="isDown()"
-       [matTooltip]="statusLabel()"
-       matTooltipPosition="below">
-    <span class="connection-dot" [class.connected]="health().connected"></span>
-    <span class="health-label">{{ statusLabel() }}</span>
-  </div>
-
-  <!-- Total Active Agents -->
-  <div class="summary-item" matTooltip="Total active agents" matTooltipPosition="below">
-    <mat-icon aria-hidden="true">smart_toy</mat-icon>
-    <span class="metric-value">{{ summary().active }} / {{ summary().total }}</span>
-    <span class="metric-label">Active</span>
-  </div>
-
-  <!-- Status Breakdown -->
-  <div class="summary-item status-breakdown">
-    <mat-chip-set aria-label="Agent status breakdown">
-      <mat-chip
-        class="status-chip chip-active"
-        [class.has-count]="summary().active > 0"
-        matTooltip="Active agents">
-        <mat-icon matChipStart>check_circle</mat-icon>
-        <span class="chip-count">{{ summary().active }}</span>
-        <span class="chip-label">Active</span>
-      </mat-chip>
-
-      <mat-chip
-        class="status-chip chip-idle"
-        [class.has-count]="summary().idle > 0"
-        matTooltip="Idle agents">
-        <mat-icon matChipStart>pause_circle</mat-icon>
-        <span class="chip-count">{{ summary().idle }}</span>
-        <span class="chip-label">Idle</span>
-      </mat-chip>
-
-      <mat-chip
-        class="status-chip chip-thinking"
-        [class.has-count]="summary().thinking > 0"
-        matTooltip="Thinking agents">
-        <mat-icon matChipStart>psychology</mat-icon>
-        <span class="chip-count">{{ summary().thinking }}</span>
-        <span class="chip-label">Thinking</span>
-      </mat-chip>
-
-      <mat-chip
-        class="status-chip chip-error"
-        [class.has-count]="hasErrors()"
-        matTooltip="Agents in error">
-        <mat-icon matChipStart>error</mat-icon>
-        <span class="chip-count">{{ summary().error }}</span>
-        <span class="chip-label">Error</span>
-      </mat-chip>
-    </mat-chip-set>
-  </div>
-
-</section>
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.scss
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.scss
@@ -1,174 +0,0 @@
-/**
- * Dashboard Summary Component Styles
- * Touch-optimized for kiosk (Raspberry Pi 5) and mobile PWA
- * Uses Angular Material utility classes where possible
- */
-
-// Touch-optimized sizing
-$touch-target-min: 48px;
-$kiosk-font-primary: 20px;
-$mobile-font-primary: 16px;
-$spacing-unit: 8px;
-
-// Status colors — high contrast for workshop/bright environments
-$color-active: #4ade70;    // Green — printing/active
-$color-idle: #94a3b8;      // Gray — idle/offline
-$color-thinking: #60a5fa;  // Blue — thinking/processing
-$color-error: #f87171;     // Red — error/failed
-$color-connected: #4ade70; // Green — SignalR connected
-$color-disconnected: #f87171; // Red — disconnected
-
-.dashboard-summary {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit * 2;
-  padding: $spacing-unit * 2;
-  overflow-x: auto;
-  -webkit-overflow-scrolling: touch;
-
-  // Responsive: on mobile, allow horizontal scroll
-  @media (max-width: 480px) {
-    padding: $spacing-unit;
-    gap: $spacing-unit;
-  }
-}
-
-.summary-item {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit;
-  min-height: $touch-target-min;
-  white-space: nowrap;
-
-  .metric-value {
-    font-size: $kiosk-font-primary;
-    font-weight: 600;
-    line-height: 1.2;
-
-    @media (max-width: 480px) {
-      font-size: $mobile-font-primary;
-    }
-  }
-
-  .metric-label {
-    font-size: 12px;
-    color: rgba(255, 255, 255, 0.7);
-    text-transform: uppercase;
-    letter-spacing: 0.05em;
-
-    @media (max-width: 480px) {
-      font-size: 10px;
-    }
-  }
-}
-
-// Health indicator
-.health-indicator {
-  padding: $spacing-unit $spacing-unit * 2;
-  border-radius: 24px;
-  transition: background-color 0.3s ease;
-
-  &.healthy {
-    background-color: rgba($color-active, 0.15);
-  }
-
-  &.degraded {
-    background-color: rgba($color-thinking, 0.15);
-  }
-
-  &.down {
-    background-color: rgba($color-error, 0.15);
-  }
-
-  .connection-dot {
-    width: 12px;
-    height: 12px;
-    border-radius: 50%;
-    display: inline-block;
-    transition: background-color 0.3s ease;
-
-    &.connected {
-      background-color: $color-connected;
-      box-shadow: 0 0 6px $color-connected;
-    }
-
-    &:not(.connected) {
-      background-color: $color-disconnected;
-      box-shadow: 0 0 6px $color-disconnected;
-    }
-  }
-
-  .health-label {
-    font-size: 14px;
-    font-weight: 500;
-
-    @media (max-width: 480px) {
-      font-size: 12px;
-    }
-  }
-}
-
-// Status breakdown chips
-.status-breakdown {
-  flex-shrink: 0;
-}
-
-.status-chip {
-  min-height: $touch-target-min !important;
-  font-size: 14px !important;
-
-  @media (max-width: 480px) {
-    min-height: 40px !important;
-    font-size: 12px !important;
-    padding: 0 8px !important;
-  }
-
-  .chip-count {
-    font-weight: 700;
-    margin: 0 4px;
-  }
-
-  .chip-label {
-    font-size: 12px;
-    opacity: 0.8;
-  }
-
-  mat-icon {
-    font-size: 18px !important;
-    width: 18px !important;
-    height: 18px !important;
-  }
-}
-
-// Status chip color variants
-.chip-active {
-  --mdc-chip-outline-color: #{$color-active};
-
-  &.has-count {
-    background-color: rgba($color-active, 0.15) !important;
-  }
-}
-
-.chip-idle {
-  --mdc-chip-outline-color: #{$color-idle};
-
-  &.has-count {
-    background-color: rgba($color-idle, 0.15) !important;
-  }
-}
-
-.chip-thinking {
-  --mdc-chip-outline-color: #{$color-thinking};
-
-  &.has-count {
-    background-color: rgba($color-thinking, 0.15) !important;
-  }
-}
-
-.chip-error {
-  --mdc-chip-outline-color: #{$color-error};
-
-  &.has-count {
-    background-color: rgba($color-error, 0.2) !important;
-  }
-}
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.spec.ts
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.spec.ts
@@ -1,103 +0,0 @@
-import { ComponentFixture, TestBed } from '@angular/core/testing';
-import { DashboardSummaryComponent } from './dashboard-summary.component';
-import { AgentSummary, SystemHealth } from '../../models/agent.model';
-
-describe('DashboardSummaryComponent', () => {
-  let component: DashboardSummaryComponent;
-  let fixture: ComponentFixture<DashboardSummaryComponent>;
-
-  const mockSummary: AgentSummary = {
-    total: 7,
-    active: 4,
-    idle: 1,
-    thinking: 1,
-    error: 1,
-  };
-
-  const mockHealthy: SystemHealth = {
-    connected: true,
-    status: 'healthy',
-  };
-
-  beforeEach(async () => {
-    await TestBed.configureTestingModule({
-      imports: [DashboardSummaryComponent],
-    }).compileComponents();
-
-    fixture = TestBed.createComponent(DashboardSummaryComponent);
-    component = fixture.componentInstance;
-  });
-
-  it('should create', () => {
-    expect(component).toBeTruthy();
-  });
-
-  it('should default to zeroed summary', () => {
-    const summary = component.summary();
-    expect(summary.total).toBe(0);
-    expect(summary.active).toBe(0);
-    expect(summary.idle).toBe(0);
-    expect(summary.thinking).toBe(0);
-    expect(summary.error).toBe(0);
-  });
-
-  it('should default to disconnected/down health', () => {
-    const health = component.health();
-    expect(health.connected).toBe(false);
-    expect(health.status).toBe('down');
-  });
-
-  it('should update summary data', () => {
-    component.updateSummary(mockSummary);
-    expect(component.summary()).toEqual(mockSummary);
-  });
-
-  it('should update health data', () => {
-    component.updateHealth(mockHealthy);
-    expect(component.health()).toEqual(mockHealthy);
-  });
-
-  it('should compute hasErrors correctly', () => {
-    expect(component.hasErrors()).toBe(false);
-    component.updateSummary({ ...mockSummary, error: 2 });
-    expect(component.hasErrors()).toBe(true);
-  });
-
-  it('should compute connectionColor correctly', () => {
-    expect(component.connectionColor()).toBe('disconnected');
-    component.updateHealth({ connected: true, status: 'healthy' });
-    expect(component.connectionColor()).toBe('connected');
-  });
-
-  it('should compute statusLabel for each state', () => {
-    component.updateHealth({ connected: true, status: 'healthy' });
-    expect(component.statusLabel()).toBe('All Systems Go');
-
-    component.updateHealth({ connected: true, status: 'degraded' });
-    expect(component.statusLabel()).toBe('Degraded');
-
-    component.updateHealth({ connected: false, status: 'down' });
-    expect(component.statusLabel()).toBe('Offline');
-  });
-
-  it('should render summary values in template', () => {
-    component.updateSummary(mockSummary);
-    component.updateHealth(mockHealthy);
-    fixture.detectChanges();
-
-    const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.textContent).toContain('4 / 7');
-    expect(compiled.textContent).toContain('Active');
-    expect(compiled.textContent).toContain('All Systems Go');
-  });
-
-  it('should render status breakdown chips', () => {
-    component.updateSummary(mockSummary);
-    fixture.detectChanges();
-
-    const compiled = fixture.nativeElement as HTMLElement;
-    expect(compiled.textContent).toContain('4');  // active count
-    expect(compiled.textContent).toContain('1');   // idle count (multiple)
-    expect(compiled.textContent).toContain('Error');
-  });
-});
--- a/frontend/src/app/components/dashboard-summary/dashboard-summary.component.ts
+++ b/frontend/src/app/components/dashboard-summary/dashboard-summary.component.ts
@@ -1,80 +0,0 @@
-import { ChangeDetectionStrategy, Component, Input, OnDestroy, signal, computed } 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 { MatTooltipModule } from '@angular/material/tooltip';
-import { AgentSummary, SystemHealth } from '../../models/agent.model';
-
-@Component({
-  selector: 'app-dashboard-summary',
-  standalone: true,
-  imports: [
-    CommonModule,
-    MatButtonModule,
-    MatIconModule,
-    MatChipsModule,
-    MatTooltipModule,
-  ],
-  templateUrl: './dashboard-summary.component.html',
-  styleUrls: ['./dashboard-summary.component.scss'],
-  changeDetection: ChangeDetectionStrategy.OnPush,
-})
-export class DashboardSummaryComponent implements OnDestroy {
-  /** Agent summary data — reactive signal, updatable via updateSummary() */
-  readonly summary = signal<AgentSummary>({
-    total: 0,
-    active: 0,
-    idle: 0,
-    thinking: 0,
-    error: 0,
-  });
-
-  /** System health data — reactive signal, updatable via updateHealth() */
-  readonly health = signal<SystemHealth>({
-    connected: false,
-    status: 'down',
-  });
-
-  /** Computed signal: whether there are errors to highlight */
-  readonly hasErrors = computed(() => this.summary().error > 0);
-
-  /** Computed signal: whether system is degraded */
-  readonly isDegraded = computed(() => this.health().status === 'degraded');
-
-  /** Computed signal: whether system is down */
-  readonly isDown = computed(() => this.health().status === 'down');
-
-  /** Computed signal: connection indicator color */
-  readonly connectionColor = computed(() =>
-    this.health().connected ? 'connected' : 'disconnected'
-  );
-
-  /** Computed signal: overall status label */
-  readonly statusLabel = computed(() => {
-    const h = this.health();
-    if (h.status === 'healthy') return 'All Systems Go';
-    if (h.status === 'degraded') return 'Degraded';
-    return 'Offline';
-  });
-
-  /**
-   * Update the agent summary. Called by the parent or a service
-   * when new data arrives (e.g., via SignalR).
-   */
-  updateSummary(data: AgentSummary): void {
-    this.summary.set(data);
-  }
-
-  /**
-   * Update the system health. Called by the parent or a service
-   * when the connection state changes.
-   */
-  updateHealth(data: SystemHealth): void {
-    this.health.set(data);
-  }
-
-  ngOnDestroy(): void {
-    // Cleanup handled by signals — no manual subscription teardown needed
-  }
-}
--- a/frontend/src/app/components/filament-table/filament-table.component.html
+++ b/frontend/src/app/components/filament-table/filament-table.component.html
@@ -1,123 +0,0 @@
-<!-- Filament Inventory Table — with low stock indicators -->
-<div class="filament-table-container" role="region" aria-label="Filament inventory">
-
-  <!-- Low Stock Alert Banner — shown when critical or low stock spools exist -->
-  @if (criticalCount() > 0) {
-    <div class="alert-banner critical" role="alert">
-      <mat-icon aria-hidden="true">error</mat-icon>
-      <span>{{ criticalCount() }} spool{{ criticalCount() > 1 ? 's' : '' }} critically low (&le;10% remaining)</span>
-    </div>
-  } @else if (lowStockCount() > 0) {
-    <div class="alert-banner low" role="alert">
-      <mat-icon aria-hidden="true">warning</mat-icon>
-      <span>{{ lowStockCount() }} spool{{ lowStockCount() > 1 ? 's' : '' }} running low (&le;25% remaining)</span>
-    </div>
-  }
-
-  <!-- Filament Table -->
-  <table mat-table
-         [dataSource]="sortedFilaments()"
-         matSort
-         (matSortChange)="sortData($event)"
-         class="filament-table"
-         aria-label="Filament inventory table">
-
-    <!-- Color Column -->
-    <ng-container matColumnDef="color">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="color">Color</th>
-      <td mat-cell *matCellDef="let filament">
-        <span class="color-swatch"
-              [style.background-color]="filament.colorHex"
-              [matTooltip]="filament.colorName"
-              matTooltipPosition="after"
-              [attr.aria-label]="filament.colorName">
-        </span>
-      </td>
-    </ng-container>
-
-    <!-- Material Column -->
-    <ng-container matColumnDef="material">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="material">Material</th>
-      <td mat-cell *matCellDef="let filament">
-        <span class="material-name">{{ filament.materialBaseName }}</span>
-        @if (filament.materialModifierName) {
-          <span class="material-modifier"> {{ filament.materialModifierName }}</span>
-        }
-      </td>
-    </ng-container>
-
-    <!-- Brand Column -->
-    <ng-container matColumnDef="brand">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="brand">Brand</th>
-      <td mat-cell *matCellDef="let filament">{{ filament.brand }}</td>
-    </ng-container>
-
-    <!-- Serial Column -->
-    <ng-container matColumnDef="serial">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="serial">Serial</th>
-      <td mat-cell *matCellDef="let filament" class="serial-cell">{{ filament.spoolSerial }}</td>
-    </ng-container>
-
-    <!-- Remaining Weight Column -->
-    <ng-container matColumnDef="remaining">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="remaining">Remaining</th>
-      <td mat-cell *matCellDef="let filament">
-        <div class="remaining-cell">
-          <span class="remaining-text">
-            {{ formatWeight(filament.weightRemainingGrams) }} / {{ formatWeight(filament.weightTotalGrams) }}
-          </span>
-          <mat-progress-bar
-            mode="determinate"
-            [value]="getRemainingPercent(filament)"
-            [ngClass]="classifyStockLevel(filament)"
-            [matTooltip]="getRemainingPercent(filament).toFixed(0) + '% remaining'"
-            matTooltipPosition="below">
-          </mat-progress-bar>
-        </div>
-      </td>
-    </ng-container>
-
-    <!-- Stock Level Indicator Column -->
-    <ng-container matColumnDef="stockLevel">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="stockLevel">Stock</th>
-      <td mat-cell *matCellDef="let filament">
-        @let level = classifyStockLevel(filament);
-        <mat-chip-set aria-label="Stock level">
-          <mat-chip
-            [ngClass]="level"
-            [matTooltip]="stockLevelLabel(level) + ' — ' + getRemainingPercent(filament).toFixed(0) + '% remaining'"
-            matTooltipPosition="below">
-            <mat-icon matChipStart [ngClass]="level">{{ stockLevelIcon(level) }}</mat-icon>
-            <span>{{ stockLevelLabel(level) }}</span>
-          </mat-chip>
-        </mat-chip-set>
-      </td>
-    </ng-container>
-
-    <!-- Status Column -->
-    <ng-container matColumnDef="status">
-      <th mat-header-cell *matHeaderCellDef mat-sort-header="status">Status</th>
-      <td mat-cell *matCellDef="let filament">
-        <span class="status-badge"
-              [class.active]="filament.isActive"
-              [class.inactive]="!filament.isActive">
-          {{ filament.isActive ? 'Active' : 'Inactive' }}
-        </span>
-      </td>
-    </ng-container>
-
-    <tr mat-header-row *matHeaderRowDef="columns()"></tr>
-    <tr mat-row *matRowDef="let row; columns: columns();"
-        [class.row-critical]="classifyStockLevel(row) === 'critical'"
-        [class.row-low]="classifyStockLevel(row) === 'low'">
-    </tr>
-  </table>
-
-  <!-- Empty state -->
-  @if (filaments().length === 0) {
-    <div class="empty-state" role="status">
-      <mat-icon aria-hidden="true">inventory_2</mat-icon>
-      <p>No filament spools found</p>
-    </div>
-  }
-</div>
--- a/frontend/src/app/components/filament-table/filament-table.component.scss
+++ b/frontend/src/app/components/filament-table/filament-table.component.scss
@@ -1,259 +0,0 @@
-/**
- * Filament Table Component Styles
- * Touch-optimized for kiosk (Raspberry Pi 5) and mobile PWA
- * Low stock indicators use high-contrast colors for workshop visibility
- */
-
-// Touch-optimized sizing
-$touch-target-min: 48px;
-$spacing-unit: 8px;
-
-// Stock level colors — high contrast, accessible
-$color-critical: #ef4444;   // Red — critically low
-$color-low: #f59e0b;       // Amber — running low
-$color-moderate: #3b82f6;  // Blue — moderate
-$color-healthy: #22c55e;   // Green — healthy/OK
-$color-active: #22c55e;    // Green — active spool
-$color-inactive: #94a3b8;  // Gray — inactive spool
-
-.filament-table-container {
-  width: 100%;
-  overflow-x: auto;
-  -webkit-overflow-scrolling: touch;
-}
-
-// Alert banner for low stock warnings
-.alert-banner {
-  display: flex;
-  align-items: center;
-  gap: $spacing-unit;
-  padding: $spacing-unit * 1.5 $spacing-unit * 2;
-  border-radius: 8px;
-  margin-bottom: $spacing-unit * 2;
-  font-size: 14px;
-  font-weight: 500;
-
-  mat-icon {
-    font-size: 20px !important;
-    width: 20px !important;
-    height: 20px !important;
-  }
-
-  &.critical {
-    background-color: rgba($color-critical, 0.12);
-    color: $color-critical;
-    border: 1px solid rgba($color-critical, 0.3);
-  }
-
-  &.low {
-    background-color: rgba($color-low, 0.12);
-    color: $color-low;
-    border: 1px solid rgba($color-low, 0.3);
-  }
-}
-
-// Table styling
-.filament-table {
-  width: 100%;
-  min-width: 700px;
-
-  th {
-    font-weight: 600;
-    font-size: 13px;
-    text-transform: uppercase;
-    letter-spacing: 0.04em;
-    color: var(--mat-sys-on-surface-variant);
-  }
-
-  td {
-    font-size: 14px;
-    padding: 12px 16px !important;
-    min-height: $touch-target-min;
-
-    @media (max-width: 480px) {
-      padding: 8px 12px !important;
-      font-size: 13px;
-    }
-  }
-
-  // Row highlight for low stock
-  .mat-mdc-row {
-    transition: background-color 0.2s ease;
-  }
-
-  &.row-critical {
-    background-color: rgba($color-critical, 0.06) !important;
-
-    &:hover {
-      background-color: rgba($color-critical, 0.1) !important;
-    }
-  }
-
-  &.row-low {
-    background-color: rgba($color-low, 0.06) !important;
-
-    &:hover {
-      background-color: rgba($color-low, 0.1) !important;
-    }
-  }
-}
-
-// Color swatch
-.color-swatch {
-  display: inline-block;
-  width: 28px;
-  height: 28px;
-  border-radius: 50%;
-  border: 2px solid rgba(0, 0, 0, 0.12);
-  vertical-align: middle;
-  cursor: default;
-
-  @media (max-width: 480px) {
-    width: 24px;
-    height: 24px;
-  }
-}
-
-// Material name
-.material-name {
-  font-weight: 500;
-}
-
-.material-modifier {
-  font-size: 12px;
-  color: var(--mat-sys-on-surface-variant);
-  margin-left: 4px;
-}
-
-// Serial cell — monospace
-.serial-cell {
-  font-family: 'JetBrains Mono', 'Roboto Mono', monospace;
-  font-size: 13px;
-  letter-spacing: 0.02em;
-}
-
-// Remaining weight cell
-.remaining-cell {
-  display: flex;
-  flex-direction: column;
-  gap: 4px;
-  min-width: 120px;
-
-  .remaining-text {
-    font-size: 13px;
-    color: var(--mat-sys-on-surface-variant);
-  }
-}
-
-// Progress bar stock level variants
-mat-progress-bar {
-  &.critical {
-    --mat-progress-bar-active-indicator-color: #{$color-critical};
-  }
-
-  &.low {
-    --mat-progress-bar-active-indicator-color: #{$color-low};
-  }
-
-  &.moderate {
-    --mat-progress-bar-active-indicator-color: #{$color-moderate};
-  }
-
-  &.healthy {
-    --mat-progress-bar-active-indicator-color: #{$color-healthy};
-  }
-}
-
-// Stock level chip variants
-mat-chip {
-  min-height: 32px !important;
-  font-size: 12px !important;
-
-  &.critical {
-    background-color: rgba($color-critical, 0.15) !important;
-    color: $color-critical;
-
-    mat-icon {
-      color: $color-critical;
-    }
-  }
-
-  &.low {
-    background-color: rgba($color-low, 0.15) !important;
-    color: $color-low;
-
-    mat-icon {
-      color: $color-low;
-    }
-  }
-
-  &.moderate {
-    background-color: rgba($color-moderate, 0.1) !important;
-    color: $color-moderate;
-
-    mat-icon {
-      color: $color-moderate;
-    }
-  }
-
-  &.healthy {
-    background-color: rgba($color-healthy, 0.1) !important;
-    color: $color-healthy;
-
-    mat-icon {
-      color: $color-healthy;
-    }
-  }
-
-  mat-icon {
-    font-size: 16px !important;
-    width: 16px !important;
-    height: 16px !important;
-    margin-right: 4px;
-  }
-}
-
-// Status badge
-.status-badge {
-  display: inline-flex;
-  align-items: center;
-  padding: 4px 12px;
-  border-radius: 12px;
-  font-size: 12px;
-  font-weight: 600;
-  text-transform: uppercase;
-  letter-spacing: 0.04em;
-
-  &.active {
-    background-color: rgba($color-active, 0.12);
-    color: $color-active;
-  }
-
-  &.inactive {
-    background-color: rgba($color-inactive, 0.12);
-    color: $color-inactive;
-  }
-}
-
-// Empty state
-.empty-state {
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-  justify-content: center;
-  padding: 48px $spacing-unit * 2;
-  color: var(--mat-sys-on-surface-variant);
-
-  mat-icon {
-    font-size: 48px !important;
-    width: 48px !important;
-    height: 48px !important;
-    opacity: 0.4;
-    margin-bottom: $spacing-unit * 2;
-  }
-
-  p {
-    font-size: 16px;
-    margin: 0;
-  }
-}
--- a/frontend/src/app/components/filament-table/filament-table.component.spec.ts
+++ b/frontend/src/app/components/filament-table/filament-table.component.spec.ts
@@ -1,88 +0,0 @@
-import { describe, it, expect } from 'vitest';
-import {
-  Filament,
-  StockLevel,
-  getRemainingPercent,
-  classifyStockLevel,
-} from '../../models/filament.model';
-
-/** Create a test filament with defaults — override specific fields */
-function createFilament(overrides: Partial<Filament> = {}): Filament {
-  return {
-    id: '00000000-0000-0000-0000-000000000001',
-    materialBaseId: '10000000-0000-0000-0000-000000000001',
-    materialBaseName: 'PLA',
-    materialFinishId: '20000000-0000-0000-0000-000000000001',
-    materialFinishName: 'Basic',
-    materialModifierId: null,
-    materialModifierName: null,
-    brand: 'Bambu Lab',
-    colorName: 'White',
-    colorHex: '#FFFFFF',
-    weightTotalGrams: 1000,
-    weightRemainingGrams: 750,
-    filamentDiameterMm: 1.75,
-    spoolSerial: 'SN-001',
-    purchasePrice: null,
-    purchaseDate: null,
-    isActive: true,
-    createdAt: '2026-01-01T00:00:00Z',
-    updatedAt: '2026-01-01T00:00:00Z',
-    qrCodeUrl: '',
-    ...overrides,
-  };
-}
-
-describe('getRemainingPercent', () => {
-  it('should return correct percentage', () => {
-    const filament = createFilament({ weightTotalGrams: 1000, weightRemainingGrams: 250 });
-    expect(getRemainingPercent(filament)).toBe(25);
-  });
-
-  it('should return 0 when total weight is 0', () => {
-    const filament = createFilament({ weightTotalGrams: 0, weightRemainingGrams: 0 });
-    expect(getRemainingPercent(filament)).toBe(0);
-  });
-
-  it('should cap at 100%', () => {
-    const filament = createFilament({ weightTotalGrams: 100, weightRemainingGrams: 200 });
-    expect(getRemainingPercent(filament)).toBe(100);
-  });
-
-  it('should floor at 0%', () => {
-    const filament = createFilament({ weightTotalGrams: 100, weightRemainingGrams: -10 });
-    expect(getRemainingPercent(filament)).toBe(0);
-  });
-});
-
-describe('classifyStockLevel', () => {
-  it('should classify as critical when ≤10%', () => {
-    const filament = createFilament({ weightTotalGrams: 1000, weightRemainingGrams: 50 });
-    expect(classifyStockLevel(filament)).toBe('critical');
-  });
-
-  it('should classify as critical at exactly 10%', () => {
-    const filament = createFilament({ weightTotalGrams: 1000, weightRemainingGrams: 100 });
-    expect(classifyStockLevel(filament)).toBe('critical');
-  });
-
-  it('should classify as low when ≤25%', () => {
-    const filament = createFilament({ weightTotalGrams: 1000, weightRemainingGrams: 200 });
-    expect(classifyStockLevel(filament)).toBe('low');
-  });
-
-  it('should classify as moderate when ≤50%', () => {
-    const filament = createFilament({ weightTotalGrams: 1000, weightRemainingGrams: 400 });
-    expect(classifyStockLevel(filament)).toBe('moderate');
-  });
-
-  it('should classify as healthy when >50%', () => {
-    const filament = createFilament({ weightTotalGrams: 1000, weightRemainingGrams: 750 });
-    expect(classifyStockLevel(filament)).toBe('healthy');
-  });
-
-  it('should classify 0 grams remaining as critical', () => {
-    const filament = createFilament({ weightTotalGrams: 1000, weightRemainingGrams: 0 });
-    expect(classifyStockLevel(filament)).toBe('critical');
-  });
-});
--- a/frontend/src/app/components/filament-table/filament-table.component.ts
+++ b/frontend/src/app/components/filament-table/filament-table.component.ts
@@ -1,315 +0,0 @@
-import {
-  ChangeDetectionStrategy,
-  Component,
-  Input,
-  computed,
-  signal,
-} from '@angular/core';
-import { CommonModule } from '@angular/common';
-import { MatTableModule } from '@angular/material/table';
-import { MatChipsModule } from '@angular/material/chips';
-import { MatIconModule } from '@angular/material/icon';
-import { MatProgressBarModule } from '@angular/material/progress-bar';
-import { MatTooltipModule } from '@angular/material/tooltip';
-import { MatSortModule, Sort } from '@angular/material/sort';
-import {
-  Filament,
-  StockLevel,
-  getRemainingPercent,
-  classifyStockLevel,
-} from '../../models/filament.model';
-
-/** Display column definitions for the filament table */
-export type FilamentColumn =
-  | 'color'
-  | 'material'
-  | 'brand'
-  | 'serial'
-  | 'remaining'
-  | 'stockLevel'
-  | 'status';
-
-@Component({
-  selector: 'app-filament-table',
-  standalone: true,
-  imports: [
-    CommonModule,
-    MatTableModule,
-    MatChipsModule,
-    MatIconModule,
-    MatProgressBarModule,
-    MatTooltipModule,
-    MatSortModule,
-  ],
-  templateUrl: './filament-table.component.html',
-  styleUrl: './filament-table.component.scss',
-  changeDetection: ChangeDetectionStrategy.OnPush,
-})
-export class FilamentTableComponent {
-  /** Filament data input — reactive signal for live updates */
-  readonly filaments = signal<Filament[]>([]);
-
-  /** Columns to display — defaults to all columns */
-  @Input()
-  set displayedColumns(cols: FilamentColumn[]) {
-    this._displayedColumns.set(cols);
-  }
-  get displayedColumns(): FilamentColumn[] {
-    return this._displayedColumns();
-  }
-  private readonly _displayedColumns = signal<FilamentColumn[]>([
-    'color',
-    'material',
-    'brand',
-    'serial',
-    'remaining',
-    'stockLevel',
-    'status',
-  ]);
-
-  /** Default columns for template binding */
-  readonly columns = this._displayedColumns;
-
-  /** Sorted filament data */
-  readonly sortedFilaments = signal<Filament[]>([]);
-
-  /** Computed: count of low/critical spools */
-  readonly lowStockCount = computed(() =>
-    this.filaments().filter(
-      (f) => classifyStockLevel(f) === 'low' || classifyStockLevel(f) === 'critical'
-    ).length
-  );
-
-  /** Computed: count of critical spools */
-  readonly criticalCount = computed(() =>
-    this.filaments().filter((f) => classifyStockLevel(f) === 'critical').length
-  );
-
-  constructor() {
-    // Initialize sorted data from filaments
-    // (MatSort handles sorting via sortChange; we start unsorted)
-
-    // Development: seed with sample data for visual testing
-    // TODO: Replace with service data from FilamentService / SignalR
-    this.updateFilaments([
-      {
-        id: '1',
-        materialBaseId: 'm1',
-        materialBaseName: 'PLA',
-        materialFinishId: 'f1',
-        materialFinishName: 'Basic',
-        materialModifierId: null,
-        materialModifierName: null,
-        brand: 'Bambu Lab',
-        colorName: 'White',
-        colorHex: '#F5F5F5',
-        weightTotalGrams: 1000,
-        weightRemainingGrams: 850,
-        filamentDiameterMm: 1.75,
-        spoolSerial: 'SN-001',
-        purchasePrice: 25.00,
-        purchaseDate: '2026-01-15T00:00:00Z',
-        isActive: true,
-        createdAt: '2026-01-15T00:00:00Z',
-        updatedAt: '2026-04-20T00:00:00Z',
-        qrCodeUrl: '',
-      },
-      {
-        id: '2',
-        materialBaseId: 'm2',
-        materialBaseName: 'PETG',
-        materialFinishId: 'f2',
-        materialFinishName: 'Matte',
-        materialModifierId: 'mod1',
-        materialModifierName: 'Carbon Fiber',
-        brand: 'Polymaker',
-        colorName: 'Fire Engine Red',
-        colorHex: '#FF0000',
-        weightTotalGrams: 1000,
-        weightRemainingGrams: 80,
-        filamentDiameterMm: 1.75,
-        spoolSerial: 'SN-002',
-        purchasePrice: 35.00,
-        purchaseDate: '2026-02-01T00:00:00Z',
-        isActive: true,
-        createdAt: '2026-02-01T00:00:00Z',
-        updatedAt: '2026-04-25T00:00:00Z',
-        qrCodeUrl: '',
-      },
-      {
-        id: '3',
-        materialBaseId: 'm1',
-        materialBaseName: 'PLA',
-        materialFinishId: 'f1',
-        materialFinishName: 'Basic',
-        materialModifierId: null,
-        materialModifierName: null,
-        brand: 'eSun',
-        colorName: 'Sky Blue',
-        colorHex: '#87CEEB',
-        weightTotalGrams: 1000,
-        weightRemainingGrams: 200,
-        filamentDiameterMm: 1.75,
-        spoolSerial: 'SN-003',
-        purchasePrice: 20.00,
-        purchaseDate: '2026-03-10T00:00:00Z',
-        isActive: true,
-        createdAt: '2026-03-10T00:00:00Z',
-        updatedAt: '2026-04-26T00:00:00Z',
-        qrCodeUrl: '',
-      },
-      {
-        id: '4',
-        materialBaseId: 'm3',
-        materialBaseName: 'ABS',
-        materialFinishId: 'f1',
-        materialFinishName: 'Basic',
-        materialModifierId: null,
-        materialModifierName: null,
-        brand: 'Hatchbox',
-        colorName: 'Black',
-        colorHex: '#1A1A1A',
-        weightTotalGrams: 1000,
-        weightRemainingGrams: 450,
-        filamentDiameterMm: 1.75,
-        spoolSerial: 'SN-004',
-        purchasePrice: 22.00,
-        purchaseDate: null,
-        isActive: true,
-        createdAt: '2026-01-20T00:00:00Z',
-        updatedAt: '2026-04-18T00:00:00Z',
-        qrCodeUrl: '',
-      },
-      {
-        id: '5',
-        materialBaseId: 'm1',
-        materialBaseName: 'PLA',
-        materialFinishId: 'f3',
-        materialFinishName: 'Silk',
-        materialModifierId: null,
-        materialModifierName: null,
-        brand: 'Overturn',
-        colorName: 'Gold',
-        colorHex: '#FFD700',
-        weightTotalGrams: 500,
-        weightRemainingGrams: 15,
-        filamentDiameterMm: 1.75,
-        spoolSerial: 'SN-005',
-        purchasePrice: 28.00,
-        purchaseDate: null,
-        isActive: false,
-        createdAt: '2025-12-01T00:00:00Z',
-        updatedAt: '2026-04-01T00:00:00Z',
-        qrCodeUrl: '',
-      },
-    ]);
-  }
-
-  /** Update filament data — called by parent or service */
-  updateFilaments(data: Filament[]): void {
-    this.filaments.set(data);
-    this.sortedFilaments.set([...data]);
-  }
-
-  /** Handle sort changes from MatSort */
-  sortData(sort: Sort): void {
-    const data = [...this.filaments()];
-    if (!sort.active || sort.direction === '') {
-      this.sortedFilaments.set(data);
-      return;
-    }
-    const sorted = data.sort((a, b) => {
-      const isAsc = sort.direction === 'asc';
-      switch (sort.active as FilamentColumn) {
-        case 'material':
-          return compare(a.materialBaseName, b.materialBaseName, isAsc);
-        case 'brand':
-          return compare(a.brand, b.brand, isAsc);
-        case 'serial':
-          return compare(a.spoolSerial, b.spoolSerial, isAsc);
-        case 'remaining':
-          return compare(
-            getRemainingPercent(a),
-            getRemainingPercent(b),
-            isAsc
-          );
-        case 'stockLevel':
-          return compare(
-            stockLevelOrder(classifyStockLevel(a)),
-            stockLevelOrder(classifyStockLevel(b)),
-            isAsc
-          );
-        case 'status':
-          return compare(
-            a.isActive ? 0 : 1,
-            b.isActive ? 0 : 1,
-            isAsc
-          );
-        default:
-          return 0;
-      }
-    });
-    this.sortedFilaments.set(sorted);
-  }
-
-  /** Template helper: get remaining percent */
-  getRemainingPercent = getRemainingPercent;
-
-  /** Template helper: classify stock level */
-  classifyStockLevel = classifyStockLevel;
-
-  /** Template helper: stock level icon */
-  stockLevelIcon(level: StockLevel): string {
-    switch (level) {
-      case 'critical':
-        return 'error';
-      case 'low':
-        return 'warning';
-      case 'moderate':
-        return 'info';
-      case 'healthy':
-        return 'check_circle';
-    }
-  }
-
-  /** Template helper: stock level label */
-  stockLevelLabel(level: StockLevel): string {
-    switch (level) {
-      case 'critical':
-        return 'Critical';
-      case 'low':
-        return 'Low';
-      case 'moderate':
-        return 'Moderate';
-      case 'healthy':
-        return 'Healthy';
-    }
-  }
-
-  /** Template helper: format remaining weight */
-  formatWeight(grams: number): string {
-    if (grams >= 1000) {
-      return `${(grams / 1000).toFixed(1)}kg`;
-    }
-    return `${Math.round(grams)}g`;
-  }
-}
-
-/** Compare helper for sorting */
-function compare(a: number | string, b: number | string, isAsc: boolean): number {
-  return (a < b ? -1 : a > b ? 1 : 0) * (isAsc ? 1 : -1);
-}
-
-/** Stock level sort order (critical=0, healthy=3) */
-function stockLevelOrder(level: StockLevel): number {
-  switch (level) {
-    case 'critical':
-      return 0;
-    case 'low':
-      return 1;
-    case 'moderate':
-      return 2;
-    case 'healthy':
-      return 3;
-  }
-}
--- a/frontend/src/app/models/agent-status.ts
+++ b/frontend/src/app/models/agent-status.ts
@@ -0,0 +1,15 @@
+/**
+ * Data models for agent status updates received via SignalR.
+ */
+
+/** Represents a single agent status update pushed from the server. */
+export interface AgentStatusUpdate {
+  /** Unique identifier of the agent whose status changed. */
+  agentId: string;
+
+  /** Current operational status of the agent (e.g., "Online", "Offline", "Busy", "Error"). */
+  status: string;
+
+  /** ISO 8601 timestamp of when this status was observed, or null if unknown. */
+  lastSeenAt: string | null;
+}
--- a/frontend/src/app/models/agent.model.ts
+++ b/frontend/src/app/models/agent.model.ts
@@ -1,24 +0,0 @@
-/**
- * Represents the status of a single agent/printer in the system.
- */
-export type AgentStatus = 'active' | 'idle' | 'thinking' | 'error';
-
-export interface AgentSummary {
-  /** Total number of agents in the system */
-  total: number;
-  /** Number of currently active agents */
-  active: number;
-  /** Number of currently idle agents */
-  idle: number;
-  /** Number of currently thinking/processing agents */
-  thinking: number;
-  /** Number of agents in error state */
-  error: number;
-}
-
-export interface SystemHealth {
-  /** Whether the SignalR connection is live */
-  connected: boolean;
-  /** Overall system health: healthy, degraded, or down */
-  status: 'healthy' | 'degraded' | 'down';
-}
--- a/frontend/src/app/models/filament.model.ts
+++ b/frontend/src/app/models/filament.model.ts
@@ -1,100 +0,0 @@
-/**
- * Filament model matching the Extrudex backend FilamentResponse DTO.
- * Used for displaying spool inventory in the filament table UI.
- */
-export interface Filament {
-  /** Unique identifier for the filament spool. */
-  id: string;
-
-  /** Foreign key to the base material. */
-  materialBaseId: string;
-
-  /** Name of the base material (e.g., "PLA", "PETG"). */
-  materialBaseName: string;
-
-  /** Foreign key to the material finish. */
-  materialFinishId: string;
-
-  /** Name of the material finish (e.g., "Basic", "Matte"). */
-  materialFinishName: string;
-
-  /** Foreign key to the optional material modifier. */
-  materialModifierId: string | null;
-
-  /** Name of the material modifier (e.g., "Carbon Fiber"). Null if none. */
-  materialModifierName: string | null;
-
-  /** Brand name (e.g., "Bambu Lab", "Polymaker"). */
-  brand: string;
-
-  /** Human-readable color name (e.g., "Fire Engine Red"). */
-  colorName: string;
-
-  /** Hex color code (e.g., "#FF0000"). */
-  colorHex: string;
-
-  /** Total spool weight in grams when full. */
-  weightTotalGrams: number;
-
-  /** Current remaining weight in grams. */
-  weightRemainingGrams: number;
-
-  /** Filament diameter in millimeters. Typically 1.75mm. */
-  filamentDiameterMm: number;
-
-  /** Manufacturer-assigned serial number. */
-  spoolSerial: string;
-
-  /** Purchase price per spool. Null if not tracked. */
-  purchasePrice: number | null;
-
-  /** Date the spool was purchased or received. */
-  purchaseDate: string | null;
-
-  /** Whether the spool is currently active and available. */
-  isActive: boolean;
-
-  /** Timestamp when this record was created (UTC). */
-  createdAt: string;
-
-  /** Timestamp when this record was last updated (UTC). */
-  updatedAt: string;
-
-  /** URL to the QR code image for this spool. */
-  qrCodeUrl: string;
-}
-
-/**
- * Stock level classification for low stock indicators.
- * - critical: ≤ 10% remaining
- * - low: ≤ 25% remaining
- * - moderate: ≤ 50% remaining
- * - healthy: > 50% remaining
- */
-export type StockLevel = 'critical' | 'low' | 'moderate' | 'healthy';
-
-/**
- * Compute the remaining weight percentage for a filament spool.
- * Returns a value from 0 to 100.
- */
-export function getRemainingPercent(filament: Filament): number {
-  if (filament.weightTotalGrams <= 0) return 0;
-  const pct = (filament.weightRemainingGrams / filament.weightTotalGrams) * 100;
-  return Math.min(Math.max(pct, 0), 100);
-}
-
-/**
- * Classify the stock level based on remaining percentage.
- * Thresholds:
- *   critical  — ≤ 10%  (nearly empty, red alert)
- *   low       — ≤ 25%  (getting low, amber warning)
- *   moderate  — ≤ 50%  (half or less, yellow info)
- *   healthy   — > 50%  (plenty left, green OK)
- */
-export function classifyStockLevel(filament: Filament): StockLevel {
-  const pct = getRemainingPercent(filament);
-  if (pct <= 10) return 'critical';
-  if (pct <= 25) return 'low';
-  if (pct <= 50) return 'moderate';
-  return 'healthy';
-}
--- a/frontend/src/app/services/agent-status-initializer.ts
+++ b/frontend/src/app/services/agent-status-initializer.ts
@@ -0,0 +1,24 @@
+import { APP_INITIALIZER, Provider } from '@angular/core';
+import { AgentStatusService } from './agent-status.service';
+
+/**
+ * Provider that starts the AgentStatusService SignalR connection
+ * during application initialization. Inject this in your app config
+ * providers array to ensure the hub connection is established on startup.
+ *
+ * Usage in app.config.ts:
+ *   providers: [provideAgentStatusInitializer()]
+ */
+export function provideAgentStatusInitializer(): Provider[] {
+  return [
+    {
+      provide: APP_INITIALIZER,
+      useFactory: (agentStatusService: AgentStatusService) => () => {
+        // Fire-and-forget: connection errors are logged by the service
+        agentStatusService.startConnection();
+      },
+      multi: true,
+      deps: [AgentStatusService],
+    },
+  ];
+}
--- a/frontend/src/app/services/agent-status.service.ts
+++ b/frontend/src/app/services/agent-status.service.ts
@@ -0,0 +1,141 @@
+import { Injectable, OnDestroy } from '@angular/core';
+import { BehaviorSubject, Observable, Subject, Subscription } from 'rxjs';
+import * as signalR from '@microsoft/signalr';
+
+import { AgentStatusUpdate } from '../models/agent-status';
+
+/**
+ * Angular service that manages a SignalR connection to the agent status hub
+ * and exposes real-time status updates as observables.
+ *
+ * Usage:
+ *   Inject `AgentStatusService` and subscribe to `onStatusUpdate()`
+ *   to receive push notifications whenever an agent's status changes.
+ *
+ * The connection is established automatically on app start via
+ * `APP_INITIALIZER` (configured in `app.config.ts`) and cleaned up
+ * when the service is destroyed.
+ */
+@Injectable({ providedIn: 'root' })
+export class AgentStatusService implements OnDestroy {
+  /** Base URL for the SignalR hub endpoint. */
+  private readonly hubUrl = '/hub';
+
+  /** Underlying SignalR connection instance. */
+  private hubConnection: signalR.HubConnection | null = null;
+
+  /** Internal subject that emits status updates received from the hub. */
+  private readonly statusUpdateSubject = new Subject<AgentStatusUpdate>();
+
+  /** Tracks the current connection state. Emits true when connected. */
+  private readonly connectedSubject = new BehaviorSubject<boolean>(false);
+
+  /** Subscription for auto-reconnect attempts. */
+  private reconnectSubscription: Subscription | null = null;
+
+  // ── Public Observables ──────────────────────────────────────
+
+  /** Observable that emits agent status updates pushed from the server. */
+  readonly statusUpdates$: Observable<AgentStatusUpdate> =
+    this.statusUpdateSubject.asObservable();
+
+  /** Observable that emits the current connection state (true = connected). */
+  readonly connected$: Observable<boolean> =
+    this.connectedSubject.asObservable();
+
+  // ── Lifecycle ───────────────────────────────────────────────
+
+  /** @inheritdoc */
+  ngOnDestroy(): void {
+    this.stopConnection();
+  }
+
+  // ── Connection Management ───────────────────────────────────
+
+  /**
+   * Starts the SignalR connection to the agent status hub.
+   * Safe to call multiple times — no-ops if already connected.
+   */
+  async startConnection(): Promise<void> {
+    if (this.hubConnection) {
+      return; // Already initialized
+    }
+
+    this.hubConnection = new signalR.HubConnectionBuilder()
+      .withUrl(this.hubUrl)
+      .withAutomaticReconnect([0, 2000, 5000, 10000, 30000])
+      .configureLogging(signalR.LogLevel.Information)
+      .build();
+
+    // Register server-to-client handlers
+    this.registerHandlers(this.hubConnection);
+
+    // Wire up lifecycle events
+    this.hubConnection.onreconnecting(() => {
+      console.warn('[AgentStatusService] Reconnecting to hub…');
+      this.connectedSubject.next(false);
+    });
+
+    this.hubConnection.onreconnected(() => {
+      console.info('[AgentStatusService] Reconnected to hub.');
+      this.connectedSubject.next(true);
+    });
+
+    this.hubConnection.onclose((error) => {
+      console.error('[AgentStatusService] Hub connection closed.', error);
+      this.connectedSubject.next(false);
+    });
+
+    try {
+      await this.hubConnection.start();
+      this.connectedSubject.next(true);
+      console.info('[AgentStatusService] Connected to hub at', this.hubUrl);
+    } catch (err) {
+      console.error('[AgentStatusService] Failed to connect to hub:', err);
+      this.connectedSubject.next(false);
+    }
+  }
+
+  /**
+   * Stops the SignalR connection and cleans up resources.
+   */
+  async stopConnection(): Promise<void> {
+    if (this.hubConnection) {
+      await this.hubConnection.stop();
+      this.hubConnection = null;
+      this.connectedSubject.next(false);
+    }
+    this.reconnectSubscription?.unsubscribe();
+    this.reconnectSubscription = null;
+  }
+
+  // ── Convenience Alias ────────────────────────────────────────
+
+  /**
+   * Alias for `statusUpdates$` — matches the interface described in CUB-58.
+   * Returns an Observable that emits every time the server pushes a
+   * status update for an agent.
+   */
+  onStatusUpdate(): Observable<AgentStatusUpdate> {
+    return this.statusUpdates$;
+  }
+
+  // ── Private Helpers ─────────────────────────────────────────
+
+  /**
+   * Registers handlers for server-to-client calls on the hub connection.
+   */
+  private registerHandlers(connection: signalR.HubConnection): void {
+    // Agent status changed — full update payload
+    connection.on('AgentStatusChanged', (agentId: string, status: string, lastSeenAt: string | null) => {
+      const update: AgentStatusUpdate = { agentId, status, lastSeenAt };
+      console.info('[AgentStatusService] Status update received:', update);
+      this.statusUpdateSubject.next(update);
+    });
+
+    // Generic broadcast for testing — logs to console per CUB-58 DoD
+    connection.on('BroadcastMessage', (message: string) => {
+      console.info('[AgentStatusService] Broadcast message:', message);
+    });
+  }
+}
--- a/frontend/src/app/services/index.ts
+++ b/frontend/src/app/services/index.ts
@@ -0,0 +1,7 @@
+/**
+ * Barrel file for agent status services and models.
+ * Re-export public API from this module for clean imports.
+ */
+export { AgentStatusService } from './agent-status.service';
+export { provideAgentStatusInitializer } from './agent-status-initializer';
+export { AgentStatusUpdate } from '../models/agent-status';
--- a/frontend/src/assets/.gitkeep
+++ b/frontend/src/assets/.gitkeep
--- a/frontend/public/favicon.ico
+++ b/frontend/public/favicon.ico
--- a/frontend/src/index.html
+++ b/frontend/src/index.html
@@ -1,20 +1,13 @@
 <!doctype html>
 <html lang="en">
-  <head>
-    <meta charset="utf-8" />
+<head>
+  <meta charset="utf-8">
  <title>Frontend</title>
-    <base href="/" />
-    <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <link rel="icon" type="image/x-icon" href="favicon.ico" />
-    <link rel="preconnect" href="https://fonts.googleapis.com" />
-    <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-    <link
-      href="https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500&display=swap"
-      rel="stylesheet"
-    />
-    <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" />
-  </head>
-  <body>
+  <base href="/">
+  <meta name="viewport" content="width=device-width, initial-scale=1">
+  <link rel="icon" type="image/x-icon" href="favicon.ico">
+</head>
+<body>
  <app-root></app-root>
-  </body>
+</body>
 </html>
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -1,6 +1,6 @@
 import { bootstrapApplication } from '@angular/platform-browser';
 import { appConfig } from './app/app.config';
-import { App } from './app/app';
+import { AppComponent } from './app/app.component';

-bootstrapApplication(App, appConfig)
+bootstrapApplication(AppComponent, appConfig)
  .catch((err) => console.error(err));
--- a/frontend/src/styles.scss
+++ b/frontend/src/styles.scss
@@ -1,39 +1 @@
-// Include theming for Angular Material with `mat.theme()`.
-// This Sass mixin will define CSS variables that are used for styling Angular Material
-// components according to the Material 3 design spec.
-// Learn more about theming and how to use it for your application's
-// custom components at https://material.angular.dev/guide/theming
-@use '@angular/material' as mat;
-
-html {
-  height: 100%;
-  @include mat.theme(
-    (
-      color: (
-        primary: mat.$azure-palette,
-        tertiary: mat.$blue-palette,
-      ),
-      typography: Roboto,
-      density: 0,
-    )
-  );
-}
-
-body {
-  // Default the application to a light color theme. This can be changed to
-  // `dark` to enable the dark color theme, or to `light dark` to defer to the
-  // user's system settings.
-  color-scheme: light;
-
-  // Set a default background, font and text colors for the application using
-  // Angular Material's system-level CSS variables. Learn more about these
-  // variables at https://material.angular.dev/guide/system-variables
-  background-color: var(--mat-sys-surface);
-  color: var(--mat-sys-on-surface);
-  font: var(--mat-sys-body-medium);
-
-  // Reset the user agent margin.
-  margin: 0;
-  height: 100%;
-}
 /* You can add global styles to this file, and also import other style files */
--- a/frontend/tsconfig.app.json
+++ b/frontend/tsconfig.app.json
@@ -1,15 +1,14 @@
-/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
-/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+/* To learn more about this file see: https://angular.io/config/tsconfig. */
 {
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/app",
    "types": []
  },
-  "include": [
-    "src/**/*.ts"
+  "files": [
+    "src/main.ts"
  ],
-  "exclude": [
-    "src/**/*.spec.ts"
+  "include": [
+    "src/**/*.d.ts"
  ]
 }
--- a/frontend/tsconfig.json
+++ b/frontend/tsconfig.json
@@ -1,33 +1,32 @@
-/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
-/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+/* To learn more about this file see: https://angular.io/config/tsconfig. */
 {
  "compileOnSave": false,
  "compilerOptions": {
+    "outDir": "./dist/out-tsc",
    "strict": true,
    "noImplicitOverride": true,
    "noPropertyAccessFromIndexSignature": true,
    "noImplicitReturns": true,
    "noFallthroughCasesInSwitch": true,
    "skipLibCheck": true,
-    "isolatedModules": true,
+    "esModuleInterop": true,
+    "sourceMap": true,
+    "declaration": false,
    "experimentalDecorators": true,
+    "moduleResolution": "node",
    "importHelpers": true,
    "target": "ES2022",
-    "module": "preserve"
+    "module": "ES2022",
+    "useDefineForClassFields": false,
+    "lib": [
+      "ES2022",
+      "dom"
+    ]
  },
  "angularCompilerOptions": {
    "enableI18nLegacyMessageIdFormat": false,
    "strictInjectionParameters": true,
    "strictInputAccessModifiers": true,
    "strictTemplates": true
-  },
-  "files": [],
-  "references": [
-    {
-      "path": "./tsconfig.app.json"
-    },
-    {
-      "path": "./tsconfig.spec.json"
  }
-  ]
 }
--- a/frontend/tsconfig.spec.json
+++ b/frontend/tsconfig.spec.json
@@ -1,15 +1,14 @@
-/* To learn more about Typescript configuration file: https://www.typescriptlang.org/docs/handbook/tsconfig-json.html. */
-/* To learn more about Angular compiler options: https://angular.dev/reference/configs/angular-compiler-options. */
+/* To learn more about this file see: https://angular.io/config/tsconfig. */
 {
  "extends": "./tsconfig.json",
  "compilerOptions": {
    "outDir": "./out-tsc/spec",
    "types": [
-      "vitest/globals"
+      "jasmine"
    ]
  },
  "include": [
-    "src/**/*.d.ts",
-    "src/**/*.spec.ts"
+    "src/**/*.spec.ts",
+    "src/**/*.d.ts"
  ]
 }