feat: add queue list view web ui

src/App.css

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+.app-shell {
+  min-height: 100vh;
+  padding: 2rem;
+  background: #0f172a;
+  color: #e2e8f0;
+}
+
+.page-header {
+  display: flex;
+  justify-content: space-between;
+  gap: 1rem;
+  align-items: end;
+  margin-bottom: 1.5rem;
+}
+
+.eyebrow {
+  margin: 0 0 0.5rem;
+  text-transform: uppercase;
+  letter-spacing: 0.12em;
+  color: #94a3b8;
+  font-size: 0.8rem;
+}
+
+h1 {
+  margin: 0;
+  font-size: 2.4rem;
+}
+
+.subtitle {
+  margin: 0.5rem 0 0;
+  color: #94a3b8;
+}
+
+.meta-card,
+.banner,
+.table-card {
+  background: #111827;
+  border: 1px solid #1f2937;
+  border-radius: 16px;
+  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
+}
+
+.meta-card {
+  display: flex;
+  flex-direction: column;
+  gap: 0.5rem;
+  padding: 1rem 1.25rem;
+  white-space: nowrap;
+  color: #cbd5e1;
+}
+
+.banner {
+  padding: 0.9rem 1rem;
+  margin-bottom: 1rem;
+}
+
+.banner.error {
+  border-color: #7f1d1d;
+  color: #fecaca;
+}
+
+.table-card {
+  overflow: hidden;
+}
+
+table {
+  width: 100%;
+  border-collapse: collapse;
+}
+
+th,
+td {
+  padding: 1rem;
+  text-align: left;
+  border-bottom: 1px solid #1f2937;
+}
+
+th {
+  background: #0b1220;
+  color: #94a3b8;
+  font-size: 0.85rem;
+  text-transform: uppercase;
+  letter-spacing: 0.04em;
+}
+
+tr:hover td {
+  background: rgba(148, 163, 184, 0.06);
+}
+
+.sort-button {
+  background: none;
+  border: 0;
+  color: inherit;
+  font: inherit;
+  text-transform: inherit;
+  letter-spacing: inherit;
+  padding: 0;
+  cursor: pointer;
+  display: inline-flex;
+  gap: 0.4rem;
+  align-items: center;
+}
+
+.sort-indicator {
+  color: #64748b;
+}
+
+.mono {
+  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
+}
+
+.status-badge {
+  display: inline-flex;
+  align-items: center;
+  padding: 0.3rem 0.65rem;
+  border-radius: 999px;
+  font-size: 0.85rem;
+  font-weight: 600;
+  text-transform: capitalize;
+}
+
+.status-queued { background: #1e3a8a; color: #bfdbfe; }
+.status-dispatched { background: #3f3f46; color: #e4e4e7; }
+.status-in-progress { background: #14532d; color: #bbf7d0; }
+.status-blocked { background: #78350f; color: #fde68a; }
+.status-failed { background: #7f1d1d; color: #fecaca; }
+.status-completed { background: #064e3b; color: #a7f3d0; }
+.status-cancelled { background: #374151; color: #d1d5db; }
+
+@media (max-width: 900px) {
+  .app-shell {
+    padding: 1rem;
+  }
+
+  .page-header {
+    flex-direction: column;
+    align-items: stretch;
+  }
+
+  .table-card {
+    overflow-x: auto;
+  }
+
+  table {
+    min-width: 760px;
+  }
+}

src/App.jsx

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+import { useEffect, useMemo, useState } from 'react'
+import './App.css'
+
+const API_BASE_URL = import.meta.env.VITE_API_BASE_URL || 'http://app-01:8080'
+const POLL_INTERVAL_MS = 10000
+
+const statusColors = {
+  queued: 'status-queued',
+  dispatched: 'status-dispatched',
+  in_progress: 'status-in-progress',
+  blocked: 'status-blocked',
+  failed: 'status-failed',
+  completed: 'status-completed',
+  cancelled: 'status-cancelled',
+}
+
+const columns = [
+  { key: 'id', label: 'ID' },
+  { key: 'type', label: 'Type' },
+  { key: 'status', label: 'Status' },
+  { key: 'priority', label: 'Priority' },
+  { key: 'assigned_agent', label: 'Assigned Agent' },
+  { key: 'created_at', label: 'Created At' },
+]
+
+function shortId(id) {
+  return id.slice(0, 8)
+}
+
+function formatDate(value) {
+  return new Date(value).toLocaleString()
+}
+
+function compareValues(a, b, key) {
+  const left = a[key] ?? ''
+  const right = b[key] ?? ''
+
+  if (key === 'priority') return Number(left) - Number(right)
+  if (key === 'created_at') return new Date(left).getTime() - new Date(right).getTime()
+  return String(left).localeCompare(String(right))
+}
+
+function App() {
+  const [items, setItems] = useState([])
+  const [loading, setLoading] = useState(true)
+  const [error, setError] = useState('')
+  const [sort, setSort] = useState({ key: 'created_at', direction: 'desc' })
+
+  useEffect(() => {
+    let cancelled = false
+
+    async function load() {
+      try {
+        const response = await fetch(`${API_BASE_URL}/work`)
+        if (!response.ok) throw new Error(`Request failed with ${response.status}`)
+        const data = await response.json()
+        if (!cancelled) {
+          setItems(data)
+          setError('')
+        }
+      } catch (err) {
+        if (!cancelled) setError(err.message || 'Failed to load queue')
+      } finally {
+        if (!cancelled) setLoading(false)
+      }
+    }
+
+    load()
+    const timer = setInterval(load, POLL_INTERVAL_MS)
+    return () => {
+      cancelled = true
+      clearInterval(timer)
+    }
+  }, [])
+
+  const sortedItems = useMemo(() => {
+    const next = [...items].sort((a, b) => compareValues(a, b, sort.key))
+    return sort.direction === 'asc' ? next : next.reverse()
+  }, [items, sort])
+
+  function toggleSort(key) {
+    setSort((current) => ({
+      key,
+      direction: current.key === key && current.direction === 'asc' ? 'desc' : 'asc',
+    }))
+  }
+
+  return (
+    <main className="app-shell">
+      <header className="page-header">
+        <div>
+          <p className="eyebrow">TheLab</p>
+          <h1>Work Queue</h1>
+          <p className="subtitle">Live queue view for all dispatched agent work items.</p>
+        </div>
+        <div className="meta-card">
+          <span>{items.length} items</span>
+          <span>Polling every 10s</span>
+        </div>
+      </header>
+
+      {error && <div className="banner error">{error}</div>}
+      {loading && <div className="banner">Loading queue…</div>}
+
+      <section className="table-card">
+        <table>
+          <thead>
+            <tr>
+              {columns.map((column) => (
+                <th key={column.key}>
+                  <button className="sort-button" onClick={() => toggleSort(column.key)}>
+                    {column.label}
+                    <span className="sort-indicator">
+                      {sort.key === column.key ? (sort.direction === 'asc' ? '↑' : '↓') : '↕'}
+                    </span>
+                  </button>
+                </th>
+              ))}
+            </tr>
+          </thead>
+          <tbody>
+            {sortedItems.map((item) => (
+              <tr key={item.id}>
+                <td className="mono">{shortId(item.id)}</td>
+                <td>{item.type}</td>
+                <td>
+                  <span className={`status-badge ${statusColors[item.status]}`}>{item.status}</span>
+                </td>
+                <td>{item.priority}</td>
+                <td>{item.assigned_agent || '—'}</td>
+                <td>{formatDate(item.created_at)}</td>
+              </tr>
+            ))}
+          </tbody>
+        </table>
+      </section>
+    </main>
+  )
+}
+
+export default App

src/assets/react.svg

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src/index.css

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+:root {
+  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+  line-height: 1.5;
+  font-weight: 400;
+  color: #e2e8f0;
+  background: #020617;
+  font-synthesis: none;
+  text-rendering: optimizeLegibility;
+  -webkit-font-smoothing: antialiased;
+  -moz-osx-font-smoothing: grayscale;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+html,
+body,
+#root {
+  margin: 0;
+  min-height: 100%;
+}
+
+button,
+input,
+select,
+textarea {
+  font: inherit;
+}
+
+a {
+  color: inherit;
+}

src/main.jsx

@@ -0,0 +1,10 @@
+import { StrictMode } from 'react'
+import { createRoot } from 'react-dom/client'
+import './index.css'
+import App from './App.jsx'
+
+createRoot(document.getElementById('root')).render(
+  <StrictMode>
+    <App />
+  </StrictMode>,
+)