add pipeline job management with /jobs pages and per-step output viewer

- Pipeline jobs now persist to DB with progress tracking and cost accumulation
- Jobs survive WebSocket disconnects with in-memory event buffer replay
- New /jobs list page with search, status badges, and cost display
- New /jobs/:id detail page with live WebSocket attachment and REST fallback
- Two-column layout using WorkspaceLayout for resizable steps/output panels
- Streaming messages tagged with stepIndex/iterationLabel for per-step output grouping
- TaskRunnerModal links to job detail page once job is created
- Dock entry added for Jobs page

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/apps/officer-web/App.tsx

@@ -64,6 +64,8 @@ export function App() {
             <Route path="/tasks" element={<Dashboard.Tasks />} />
             <Route path="/processes" element={<Dashboard.Processes />} />
             <Route path="/task-logs" element={<Dashboard.TaskLogs />} />
+            <Route path="/jobs" element={<Dashboard.JobsScreen />} />
+            <Route path="/jobs/:id" element={<Dashboard.JobDetail />} />
             <Route path="/dashboards" element={<Dashboard.DashboardsScreen />} />
             <Route path="/dashboards/:id" element={<Dashboard.DashboardScreen />} />
             <Route path="/projects" element={<Dashboard.ProjectListScreen />} />