Add query bar, maintenance panel, and heartbeat system

- Query bar with organized/grouped search results in portal
- Maintenance panel UI for triggering and viewing maintenance status
- Heartbeat service with periodic maintenance and dirty-tracking
- Query organizer for grouping search results by tag/kind/parent
- Slide-up animation for query panel

src/server/routes.ts

@@ -2,6 +2,8 @@ import { Router, Request, Response } from 'express';
 import { addNode, getNode, listNodes, updateNode, removeNode, addEdge, removeEdge, query } from '../core/store';
 import { getConnections, buildTree } from '../core/graph';
 import { getDb } from '../core/db';
+import { determineGroupingStrategy, groupResults } from './queryOrganizer';
+import { getLastReport, markDirty, runMaintenance } from './heartbeat';
 
 const router = Router();
 
@@ -133,4 +135,35 @@ router.post('/search', async (req: Request, res: Response) => {
   }
 });
 
+// Organized query
+router.post('/query/organize', async (req: Request, res: Response) => {
+  try {
+    const { text } = req.body;
+    if (!text) return res.status(400).json({ error: 'text is required' });
+    const results = await query(text, { limit: 30 });
+    const strategy = determineGroupingStrategy(text);
+    const grouped = groupResults(results, strategy);
+    res.json(grouped);
+  } catch (err: any) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
+// Maintenance status
+router.get('/maintenance/status', (_req: Request, res: Response) => {
+  const report = getLastReport();
+  res.json(report || { message: 'No heartbeat has run yet' });
+});
+
+// Trigger maintenance manually
+router.post('/maintenance/run', async (_req: Request, res: Response) => {
+  try {
+    markDirty();
+    const report = await runMaintenance();
+    res.json(report);
+  } catch (err: any) {
+    res.status(500).json({ error: err.message });
+  }
+});
+
 export default router;