feat: frame-based positioning and mark system foundation

Core Changes:
- Fix SearchView to use start_frame/end_frame directly (no time*fps conversion)
- Add hard_delete support to delete_trace API
- VideoPlayer: Main timeline + Mark system foundation
- Proxy: Add local routes for auth, media, identity-matches, cluster-results
- Add .gitignore to exclude build artifacts and dependencies

Design Documents:
- Multi-track Mark system design (.opencode/plans/)
- Video editing positioning standards research

Files Modified:
- src/views/SearchView.vue: Frame positioning, ensureMinDuration (240 frames)
- src/views/PeopleView.vue: batchDeleteGroups with hard_delete
- src/api/index.ts: delete_trace with hard_delete body
- src/components/VideoPlayer.vue: Timeline + Mark UI
- src-tauri/src/proxy.rs: New local routes
- AGENTS.md: Update documentation

vite.config.ts

@@ -10,10 +10,22 @@ export default defineConfig({
     }
   },
   server: {
+    host: '0.0.0.0',
     port: 5173,
+    strictPort: true,
+    allowedHosts: [
+      'studio.momentry.ddns.net',
+      'localhost',
+      '127.0.0.1',
+      '.ddns.net'
+    ],
     proxy: {
-      '/api': {
+      '/api/v1': {
         target: 'http://localhost:8888',
+        changeOrigin: true,
+      },
+      '/api/v2': {
+        target: 'http://localhost:11438',
         changeOrigin: true
       }
     }