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>

.claude/launch.json

@@ -0,0 +1,17 @@
+{
+  "version": "0.0.1",
+  "configurations": [
+    {
+      "name": "luma-server",
+      "runtimeExecutable": "npm",
+      "runtimeArgs": ["run", "server"],
+      "port": 3000
+    },
+    {
+      "name": "luma-dev",
+      "runtimeExecutable": "npm",
+      "runtimeArgs": ["run", "dev:client"],
+      "port": 5173
+    }
+  ]
+}