feat: filter sidebar, ingest progress, starred photos

- Left filter sidebar: All Photos / Favorites / Date by Year / Tags / Collections
  with counts, See more/less toggles, and blue active-row highlight
- SSE ingest badge in header: pulsing dot + filename + indexed count during scan;
  auto-refreshes the library when a scan finishes
- Starred/Favorites: starred column on photos, star button in lightbox toolbar,
  Favorites row in sidebar, ?starred=1 filter on /api/photos
- GET /api/library/stats endpoint (totals, years, tags, collections)
- GET /api/ingest/stream SSE endpoint (polls ingest_status table every 1.5s)
- Worker writes ingest_status (active, current file, scanned count) to SQLite

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

worker/index.js

@@ -13,22 +13,31 @@ const db = openDb(DB_PATH);
 console.log(`[worker] watching ${path.resolve(PHOTO_DIR)}`);
 console.log(`[worker] db at ${path.resolve(DB_PATH)} (${db.count()} photos indexed)`);
 
-// Serial queue: chokidar fires many 'add' events at once on startup;
-// process them one at a time to keep memory and I/O pressure low.
 const queue = [];
-let busy = false;
+let busy    = false;
+let scanned = 0;
+let errors  = 0;
 
 async function drain() {
   if (busy) return;
   busy = true;
+
+  db.setIngestStatus({ active: true, scanned, errors });
+
   while (queue.length > 0) {
     const fp = queue.shift();
     try {
       await ingestFile(fp, db, POSTER_DIR);
+      scanned++;
+      db.setIngestStatus({ active: true, current: path.basename(fp), scanned, errors });
     } catch (err) {
+      errors++;
       console.error(`[worker] ${path.basename(fp)}: ${err.message}`);
+      db.setIngestStatus({ active: true, current: path.basename(fp), scanned, errors });
     }
   }
+
+  db.setIngestStatus({ active: false, current: null, scanned, errors });
   busy = false;
 }
 
@@ -36,7 +45,7 @@ const watcher = chokidar.watch(PHOTO_DIR, {
   persistent: true,
   ignoreInitial: false,
   awaitWriteFinish: { stabilityThreshold: 2000, pollInterval: 100 },
-  ignored: /(^|[/\\])\../,   // skip dotfiles
+  ignored: /(^|[/\\])\../,
 });
 
 watcher.on('add', (fp) => {
@@ -46,8 +55,7 @@ watcher.on('add', (fp) => {
 });
 
 watcher.on('unlink', (fp) => {
-  const resolved = path.resolve(fp);
-  db.removePhoto(resolved);
+  db.removePhoto(path.resolve(fp));
   console.log(`[worker] removed ${path.basename(fp)}`);
 });
 
@@ -55,6 +63,7 @@ watcher.on('error', (err) => console.error('[worker] watcher error:', err));
 
 process.on('SIGINT', () => {
   console.log('\n[worker] shutting down');
+  db.setIngestStatus({ active: false, current: null, scanned, errors });
   watcher.close();
   process.exit(0);
 });