Merge pull request 'CUB-133: Build Dashboard page with summary cards' (#42) from agent/rex/CUB-133-dashboard-page into dev

Reviewed-on: #42

frontend/src/App.tsx

@@ -1,34 +1,26 @@
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
 import { BrowserRouter, Routes, Route } from 'react-router-dom'
+import Dashboard from './pages/Dashboard'
 import InventoryPage from './pages/InventoryPage'
-import ToastContainer from './components/ToastContainer'
-import { useSSE } from './hooks/useSSE'
 
 const queryClient = new QueryClient()
 
-function SSEProvider({ children }: { children: React.ReactNode }) {
-  useSSE()
-  return <>{children}</>
-}
-
 export default function App() {
   return (
     <QueryClientProvider client={queryClient}>
       <BrowserRouter>
-        <SSEProvider>
-          <div className="min-h-screen bg-slate-900 text-slate-50">
-            <header className="bg-slate-800 border-b border-slate-700 px-4 py-3 flex items-center gap-3 sticky top-0 z-20">
-              <div className="w-8 h-8 rounded bg-emerald-500 flex items-center justify-center text-slate-900 font-bold text-lg">E</div>
-              <h1 className="text-lg font-semibold">Extrudex</h1>
-            </header>
-            <main className="p-4">
-              <Routes>
-                <Route path="/" element={<InventoryPage />} />
-              </Routes>
-            </main>
-          </div>
-          <ToastContainer />
-        </SSEProvider>
+        <div className="min-h-screen bg-slate-900 text-slate-50">
+          <header className="bg-slate-800 border-b border-slate-700 px-4 py-3 flex items-center gap-3 sticky top-0 z-20">
+            <div className="w-8 h-8 rounded bg-emerald-500 flex items-center justify-center text-slate-900 font-bold text-lg">E</div>
+            <h1 className="text-lg font-semibold">Extrudex</h1>
+          </header>
+          <main className="p-4">
+            <Routes>
+              <Route path="/" element={<Dashboard />} />
+              <Route path="/inventory" element={<InventoryPage />} />
+            </Routes>
+          </main>
+        </div>
       </BrowserRouter>
     </QueryClientProvider>
   )

frontend/src/components/LoadingSpinner.tsx

@@ -0,0 +1,8 @@
+export default function LoadingSpinner() {
+  return (
+    <div className="flex flex-col items-center gap-3">
+      <div className="w-10 h-10 border-4 border-emerald-500/30 border-t-emerald-400 rounded-full animate-spin" />
+      <p className="text-slate-400 text-sm">Loading dashboard…</p>
+    </div>
+  )
+}

frontend/src/components/PrinterStatusBadge.tsx

@@ -1,17 +0,0 @@
-import { Printer } from 'lucide-react'
-
-const STYLES = {
-  online: 'bg-emerald-600 text-white',
-  offline: 'bg-slate-600 text-slate-200',
-  printing: 'bg-blue-600 text-white animate-pulse',
-}
-
-export default function PrinterStatusBadge({ status, name }: { status: string; name?: string }) {
-  const style = STYLES[status as keyof typeof STYLES] ?? STYLES.offline
-  return (
-    <span className={`inline-flex items-center gap-1.5 rounded-full px-2.5 py-1 text-xs font-medium ${style}`}>
-      <Printer size={12} />
-      {name ? `${name} · ${status}` : status}
-    </span>
-  )
-}

frontend/src/components/RecentPrints.tsx

@@ -0,0 +1,76 @@
+import type { PrintJob } from '../types'
+import { Clock, FileText } from 'lucide-react'
+
+interface RecentPrintsProps {
+  jobs: PrintJob[]
+}
+
+export default function RecentPrints({ jobs }: RecentPrintsProps) {
+  if (jobs.length === 0) {
+    return (
+      <div className="rounded-xl border border-slate-700 bg-slate-800 p-6 text-center text-slate-400">
+        <FileText size={32} className="mx-auto mb-3 text-slate-500" />
+        <p>No recent print jobs</p>
+      </div>
+    )
+  }
+
+  const statusColor = (status: string) => {
+    switch (status.toLowerCase()) {
+      case 'completed': return 'text-emerald-400 bg-emerald-500/10'
+      case 'in_progress': return 'text-sky-400 bg-sky-500/10'
+      case 'failed': return 'text-red-400 bg-red-500/10'
+      default: return 'text-slate-400 bg-slate-500/10'
+    }
+  }
+
+  return (
+    <div className="rounded-xl border border-slate-700 bg-slate-800 overflow-hidden">
+      <div className="overflow-x-auto">
+        <table className="w-full text-left">
+          <thead>
+            <tr className="border-b border-slate-700">
+              <th className="px-4 py-3 text-sm font-medium text-slate-400">Name</th>
+              <th className="px-4 py-3 text-sm font-medium text-slate-400">Status</th>
+              <th className="px-4 py-3 text-sm font-medium text-slate-400">Duration</th>
+              <th className="px-4 py-3 text-sm font-medium text-slate-400">Filament</th>
+              <th className="px-4 py-3 text-sm font-medium text-slate-400">Cost</th>
+            </tr>
+          </thead>
+          <tbody>
+            {jobs.map((job) => (
+              <tr key={job.id} className="border-b border-slate-700/50 last:border-0 hover:bg-slate-700/30 transition-colors">
+                <td className="px-4 py-3 text-sm text-slate-100 font-medium">{job.name}</td>
+                <td className="px-4 py-3">
+                  <span className={`inline-flex items-center gap-1 px-2 py-1 rounded-full text-xs font-medium ${statusColor(job.status)}`}>
+                    {job.status}
+                  </span>
+                </td>
+                <td className="px-4 py-3 text-sm text-slate-300">
+                  <div className="flex items-center gap-1">
+                    <Clock size={14} />
+                    {formatDuration(job.duration_seconds)}
+                  </div>
+                </td>
+                <td className="px-4 py-3 text-sm text-slate-300">
+                  {job.filament_used_grams?.toFixed(1) ?? '-'} g
+                </td>
+                <td className="px-4 py-3 text-sm text-slate-300">
+                  ${job.cost_usd?.toFixed(2) ?? '-'}
+                </td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </div>
+    </div>
+  )
+}
+
+function formatDuration(seconds: number): string {
+  if (!seconds) return '-'
+  const hrs = Math.floor(seconds / 3600)
+  const mins = Math.floor((seconds % 3600) / 60)
+  if (hrs > 0) return `${hrs}h ${mins}m`
+  return `${mins}m`
+}

frontend/src/components/SummaryCard.tsx

@@ -0,0 +1,31 @@
+import type { LucideIcon } from 'lucide-react'
+
+interface SummaryCardProps {
+  title: string
+  value: string | number
+  icon: LucideIcon
+  color: 'emerald' | 'amber' | 'sky' | 'violet'
+}
+
+const colorMap = {
+  emerald: { bg: 'bg-emerald-500/10', border: 'border-emerald-500/20', text: 'text-emerald-400', icon: 'text-emerald-400' },
+  amber:   { bg: 'bg-amber-500/10',  border: 'border-amber-500/20',  text: 'text-amber-400',  icon: 'text-amber-400' },
+  sky:     { bg: 'bg-sky-500/10',    border: 'border-sky-500/20',    text: 'text-sky-400',    icon: 'text-sky-400' },
+  violet:  { bg: 'bg-violet-500/10', border: 'border-violet-500/20', text: 'text-violet-400', icon: 'text-violet-400' },
+}
+
+export default function SummaryCard({ title, value, icon: Icon, color }: SummaryCardProps) {
+  const c = colorMap[color]
+
+  return (
+    <div className={`rounded-xl border ${c.border} ${c.bg} p-5 flex items-start justify-between`}>
+      <div>
+        <p className="text-sm font-medium text-slate-400 mb-1">{title}</p>
+        <p className={`text-3xl font-bold ${c.text}`}>{value}</p>
+      </div>
+      <div className={`p-2 rounded-lg ${c.bg}`}>
+        <Icon size={24} className={c.icon} />
+      </div>
+    </div>
+  )
+}

frontend/src/components/ToastContainer.tsx

@@ -1,70 +0,0 @@
-import { useEffect, useState, useCallback } from 'react'
-import { X, CheckCircle, AlertTriangle, Info } from 'lucide-react'
-import { addToastListener, type ToastMessage } from '../hooks/useSSE'
-
-const ICONS = {
-  info: Info,
-  success: CheckCircle,
-  warning: AlertTriangle,
-}
-
-const STYLES = {
-  info: 'border-blue-600 bg-blue-900/40 text-blue-100',
-  success: 'border-emerald-600 bg-emerald-900/40 text-emerald-100',
-  warning: 'border-amber-600 bg-amber-900/40 text-amber-100',
-}
-
-export default function ToastContainer() {
-  const [toasts, setToasts] = useState<ToastMessage[]>([])
-
-  const remove = useCallback((id: string) => {
-    setToasts(prev => prev.filter(t => t.id !== id))
-  }, [])
-
-  useEffect(() => {
-    return addToastListener((toast) => {
-      setToasts(prev => {
-        // Prevent duplicate identical toasts within 3 seconds
-        const now = Date.now()
-        const recent = prev.filter(
-          t => t.title === toast.title && now - parseInt(t.id.split('-').pop() || '0', 10) < 3000
-        )
-        if (recent.length > 0) return prev
-        return [...prev.slice(-4), toast]
-      })
-      // Auto-dismiss after 5 seconds
-      setTimeout(() => remove(toast.id), 5000)
-    })
-  }, [remove])
-
-  return (
-    <div className="fixed bottom-4 right-4 z-50 flex flex-col gap-2 max-w-sm w-full pointer-events-none">
-      {toasts.map((toast) => {
-        const Icon = ICONS[toast.type]
-        return (
-          <div
-            key={toast.id}
-            className={`pointer-events-auto rounded-lg border px-4 py-3 shadow-lg backdrop-blur-sm transition-all ${STYLES[toast.type]}`}
-          >
-            <div className="flex items-start gap-3">
-              <Icon size={18} className="mt-0.5 shrink-0" />
-              <div className="flex-1 min-w-0">
-                <p className="text-sm font-semibold leading-snug">{toast.title}</p>
-                {toast.body && (
-                  <p className="text-xs opacity-80 mt-0.5">{toast.body}</p>
-                )}
-              </div>
-              <button
-                onClick={() => remove(toast.id)}
-                className="shrink-0 -mr-1 -mt-1 p-1 rounded hover:bg-white/10 text-current opacity-70 hover:opacity-100 transition-opacity"
-                aria-label="Dismiss"
-              >
-                <X size={14} />
-              </button>
-            </div>
-          </div>
-        )
-      })}
-    </div>
-  )
-}

frontend/src/hooks/useSSE.ts

@@ -1,193 +0,0 @@
-import { useEffect, useRef, useCallback } from 'react'
-import { useQueryClient } from '@tanstack/react-query'
-
-export type SSEEventType =
-  | 'printer.status'
-  | 'job.started'
-  | 'job.completed'
-  | 'filament.low'
-
-export interface SSEEvent {
-  type: SSEEventType
-  payload: unknown
-  timestamp: string
-}
-
-export interface ToastMessage {
-  id: string
-  type: 'info' | 'success' | 'warning'
-  title: string
-  body?: string
-}
-
-let toastListeners: Array<(toast: ToastMessage) => void> = []
-
-export function addToastListener(cb: (toast: ToastMessage) => void) {
-  toastListeners.push(cb)
-  return () => {
-    toastListeners = toastListeners.filter(l => l !== cb)
-  }
-}
-
-function emitToast(toast: ToastMessage) {
-  toastListeners.forEach(cb => cb(toast))
-}
-
-const RECONNECT_BASE_MS = 1000
-const RECONNECT_MAX_MS = 30000
-
-export function useSSE(enabled = true) {
-  const queryClient = useQueryClient()
-  const esRef = useRef<EventSource | null>(null)
-  const reconnectTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
-  const attemptRef = useRef(0)
-
-  const connect = useCallback(() => {
-    if (!enabled) return
-    if (esRef.current) {
-      esRef.current.close()
-    }
-
-    const es = new EventSource('/api/events')
-    esRef.current = es
-
-    es.onopen = () => {
-      attemptRef.current = 0
-    }
-
-    es.addEventListener('printer.status', (e) => {
-      try {
-        const data = JSON.parse(e.data) as SSEEvent
-        const payload = data.payload as {
-          printer_id: number
-          printer_name: string
-          status: string
-        }
-        // Update printer list cache if it exists
-        queryClient.setQueryData(['printers'], (old: unknown) => {
-          if (!Array.isArray(old)) return old
-          return old.map((p: any) =>
-            p.id === payload.printer_id
-              ? { ...p, status: payload.status, name: payload.printer_name }
-              : p
-          )
-        })
-      } catch {
-        // ignore malformed event
-      }
-    })
-
-    es.addEventListener('job.started', (e) => {
-      try {
-        const data = JSON.parse(e.data) as SSEEvent
-        const payload = data.payload as {
-          job_id: number
-          job_name: string
-          printer_id: number
-          spool_id?: number
-        }
-        emitToast({
-          id: `job-started-${payload.job_id}-${Date.now()}`,
-          type: 'info',
-          title: `Job started: ${payload.job_name}`,
-          body: `Printer #${payload.printer_id}`,
-        })
-        // Invalidate print jobs list
-        queryClient.invalidateQueries({ queryKey: ['print-jobs'] })
-      } catch {
-        // ignore malformed event
-      }
-    })
-
-    es.addEventListener('job.completed', (e) => {
-      try {
-        const data = JSON.parse(e.data) as SSEEvent
-        const payload = data.payload as {
-          job_id: number
-          job_name: string
-          printer_id: number
-          duration_seconds?: number
-          total_grams_used?: number
-          total_cost_usd?: number
-        }
-        const parts: string[] = []
-        if (payload.duration_seconds != null) {
-          const mins = Math.round(payload.duration_seconds / 60)
-          parts.push(`${mins} min`)
-        }
-        if (payload.total_grams_used != null) {
-          parts.push(`${payload.total_grams_used.toFixed(1)} g used`)
-        }
-        emitToast({
-          id: `job-completed-${payload.job_id}-${Date.now()}`,
-          type: 'success',
-          title: `Job completed: ${payload.job_name}`,
-          body: parts.join(' · ') || `Printer #${payload.printer_id}`,
-        })
-        queryClient.invalidateQueries({ queryKey: ['print-jobs'] })
-        queryClient.invalidateQueries({ queryKey: ['filaments'] })
-      } catch {
-        // ignore malformed event
-      }
-    })
-
-    es.addEventListener('filament.low', (e) => {
-      try {
-        const data = JSON.parse(e.data) as SSEEvent
-        const payload = data.payload as {
-          spool_id: number
-          spool_name: string
-          remaining_grams: number
-          threshold_grams: number
-        }
-        emitToast({
-          id: `filament-low-${payload.spool_id}-${Date.now()}`,
-          type: 'warning',
-          title: `Low filament: ${payload.spool_name}`,
-          body: `${payload.remaining_grams} g remaining (threshold ${payload.threshold_grams} g)`,
-        })
-        // Update filament inventory cache in place for instant UI feedback
-        queryClient.setQueryData(['filaments'], (old: unknown) => {
-          if (!old || typeof old !== 'object') return old
-          const o = old as { data?: Array<Record<string, unknown>>; total?: number }
-          if (!Array.isArray(o.data)) return old
-          return {
-            ...o,
-            data: o.data.map((f) =>
-              (f.id as number) === payload.spool_id
-                ? { ...f, remaining_grams: payload.remaining_grams }
-                : f
-            ),
-          }
-        })
-      } catch {
-        // ignore malformed event
-      }
-    })
-
-    es.onerror = () => {
-      es.close()
-      // Exponential backoff with jitter
-      const base = Math.min(RECONNECT_MAX_MS, RECONNECT_BASE_MS * 2 ** attemptRef.current)
-      const jitter = Math.random() * 1000
-      const delay = base + jitter
-      attemptRef.current += 1
-      reconnectTimerRef.current = setTimeout(() => {
-        connect()
-      }, delay)
-    }
-  }, [enabled, queryClient])
-
-  useEffect(() => {
-    connect()
-    return () => {
-      if (reconnectTimerRef.current) {
-        clearTimeout(reconnectTimerRef.current)
-      }
-      if (esRef.current) {
-        esRef.current.close()
-        esRef.current = null
-      }
-    }
-  }, [connect])
-}

frontend/src/main.tsx

@@ -1,10 +1,25 @@
 import { StrictMode } from 'react'
 import { createRoot } from 'react-dom/client'
+import { QueryClient, QueryClientProvider } from '@tanstack/react-query'
+import { BrowserRouter } from 'react-router-dom'
 import './index.css'
 import App from './App'
 
+const queryClient = new QueryClient({
+  defaultOptions: {
+    queries: {
+      staleTime: 30_000,
+      refetchOnWindowFocus: false,
+    },
+  },
+})
+
 createRoot(document.getElementById('root')!).render(
   <StrictMode>
-    <App />
+    <QueryClientProvider client={queryClient}>
+      <BrowserRouter>
+        <App />
+      </BrowserRouter>
+    </QueryClientProvider>
   </StrictMode>,
 )

frontend/src/pages/Dashboard.tsx

@@ -0,0 +1,139 @@
+import { useQuery } from '@tanstack/react-query'
+import { getFilaments, getPrintJobs } from '../services/api'
+import SummaryCard from '../components/SummaryCard'
+import RecentPrints from '../components/RecentPrints'
+import LoadingSpinner from '../components/LoadingSpinner'
+import { Package, AlertTriangle, Printer, DollarSign, Plus, List } from 'lucide-react'
+
+export default function Dashboard() {
+  const {
+    data: filamentData,
+    isLoading: filamentLoading,
+    error: filamentError,
+  } = useQuery({
+    queryKey: ['filaments', 'count'],
+    queryFn: () => getFilaments({ limit: 1 }),
+  })
+
+  const {
+    data: lowStockData,
+    isLoading: lowStockLoading,
+    error: lowStockError,
+  } = useQuery({
+    queryKey: ['filaments', 'lowStock'],
+    queryFn: () => getFilaments({ low_stock: true, limit: 1 }),
+  })
+
+  const {
+    data: recentPrints,
+    isLoading: printsLoading,
+    error: printsError,
+  } = useQuery({
+    queryKey: ['printJobs', 'recent'],
+    queryFn: () => getPrintJobs({ limit: 5 }),
+  })
+
+  const {
+    data: allPrints,
+    isLoading: costLoading,
+    error: costError,
+  } = useQuery({
+    queryKey: ['printJobs', 'all'],
+    queryFn: () => getPrintJobs({ limit: 1000 }),
+  })
+
+  const totalSpools = filamentData?.total ?? 0
+  const lowStockCount = lowStockData?.total ?? 0
+  const recentPrintJobs = recentPrints?.data ?? []
+
+  // Calculate cost this month from all print jobs
+  const now = new Date()
+  const currentMonth = now.getMonth()
+  const currentYear = now.getFullYear()
+  const monthlyCost =
+    allPrints?.data
+      .filter((job) => {
+        const d = new Date(job.started_at)
+        return d.getMonth() === currentMonth && d.getFullYear() === currentYear
+      })
+      .reduce((sum, job) => sum + (job.cost_usd ?? 0), 0) ?? 0
+
+  const isLoading = filamentLoading || lowStockLoading || printsLoading || costLoading
+  const error = filamentError || lowStockError || printsError || costError
+
+  if (isLoading) {
+    return (
+      <div className="min-h-screen flex items-center justify-center bg-slate-900">
+        <LoadingSpinner />
+      </div>
+    )
+  }
+
+  if (error) {
+    return (
+      <div className="min-h-screen flex items-center justify-center bg-slate-900">
+        <div className="p-6 rounded-lg bg-red-900/30 border border-red-500 text-red-200 max-w-md">
+          <h2 className="text-xl font-bold mb-2">Error</h2>
+          <p className="text-sm">{(error as Error).message || 'Failed to load dashboard data.'}</p>
+        </div>
+      </div>
+    )
+  }
+
+  return (
+    <div className="min-h-screen bg-slate-900 p-4 md:p-8">
+      <div className="max-w-6xl mx-auto">
+        <header className="mb-8">
+          <h1 className="text-3xl font-bold text-emerald-400 mb-2">Dashboard</h1>
+          <p className="text-slate-400">Overview of your Extrudex inventory and prints</p>
+        </header>
+
+        {/* Summary Cards Grid */}
+        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-4 gap-4 mb-8">
+          <SummaryCard
+            title="Total Spools"
+            value={totalSpools}
+            icon={Package}
+            color="emerald"
+          />
+          <SummaryCard
+            title="Low Stock"
+            value={lowStockCount}
+            icon={AlertTriangle}
+            color={lowStockCount > 0 ? 'amber' : 'emerald'}
+          />
+          <SummaryCard
+            title="Recent Prints"
+            value={recentPrintJobs.length}
+            icon={Printer}
+            color="sky"
+          />
+          <SummaryCard
+            title="Cost This Month"
+            value={`$${monthlyCost.toFixed(2)}`}
+            icon={DollarSign}
+            color="violet"
+          />
+        </div>
+
+        {/* Quick Actions */}
+        <div className="flex flex-wrap gap-3 mb-8">
+          <button className="flex items-center gap-2 px-4 py-2 rounded-lg bg-emerald-600 hover:bg-emerald-500 text-white font-medium transition-colors active:scale-95 touch-manipulation">
+            <Plus size={18} />
+            Add Spool
+          </button>
+          <button className="flex items-center gap-2 px-4 py-2 rounded-lg bg-slate-700 hover:bg-slate-600 text-slate-100 font-medium transition-colors active:scale-95 touch-manipulation">
+            <List size={18} />
+            View Inventory
+          </button>
+        </div>
+
+        {/* Recent Prints Section */}
+        <section>
+          <h2 className="text-xl font-semibold text-slate-100 mb-4">Recent Prints</h2>
+          <RecentPrints jobs={recentPrintJobs} />
+        </section>
+      </div>
+    </div>
+  )
+}

frontend/src/services/api.ts

@@ -0,0 +1,19 @@
+import axios from 'axios'
+import type { ListResponse, FilamentSpool, PrintJob } from '../types'
+
+const api = axios.create({
+  baseURL: '/api',
+  headers: { 'Content-Type': 'application/json' },
+})
+
+export async function getFilaments(params?: { low_stock?: boolean; limit?: number; offset?: number }) {
+  const res = await api.get<ListResponse<FilamentSpool>>('/filaments', { params })
+  return res.data
+}
+
+export async function getPrintJobs(params?: { limit?: number; offset?: number }) {
+  const res = await api.get<ListResponse<PrintJob>>('/print-jobs', { params })
+  return res.data
+}
+
+export default api

frontend/src/types/index.ts

@@ -0,0 +1,42 @@
+export interface FilamentSpool {
+  id: number;
+  name: string;
+  material_base_id: number;
+  material_finish_id: number;
+  material_modifier_id: number;
+  color_hex: string;
+  brand: string;
+  diameter_mm: number;
+  initial_grams: number;
+  remaining_grams: number;
+  spool_weight_grams: number;
+  cost_usd: number;
+  low_stock_threshold_grams: number;
+  notes: string;
+  barcode: string;
+  created_at: string;
+  updated_at: string;
+  deleted_at: string | null;
+}
+
+export interface PrintJob {
+  id: number;
+  name: string;
+  printer_id: number;
+  filament_id: number;
+  status: string;
+  duration_seconds: number;
+  filament_used_grams: number;
+  cost_usd: number;
+  started_at: string;
+  completed_at: string | null;
+  created_at: string;
+  updated_at: string;
+}
+
+export interface ListResponse<T> {
+  data: T[];
+  total: number;
+  limit: number;
+  offset: number;
+}

frontend/tsconfig.json

@@ -15,6 +15,7 @@
     "noUnusedLocals": true,
     "noUnusedParameters": true,
     "noFallthroughCasesInSwitch": true,
+    "ignoreDeprecations": "5.0",
     "baseUrl": ".",
     "paths": {
       "@/*": ["src/*"]