Phase 5.1-5.4: PWA, Public Plugin Endpoints, Contacts Embedding, Search Coverage

5.1 Public Plugin Endpoints:
- PluginRouteDef.is_public field in manifest.py
- main.py: public routes mounted without auth dependency
- permissions/public_routes.py: token-based share link access (info, verify, download)
- permissions/plugin.py: public share route registered with is_public=True

5.2 PWA:
- vite.config.ts: VitePWA plugin configured (autoUpdate, workbox, runtime caching)
- frontend/public/manifest.json: PWA manifest with icons
- index.html: theme-color, manifest link, apple-touch-icon, apple-mobile-web-app meta
- Build generates sw.js + workbox (90 precache entries)

5.3 Contacts Embedding:
- contact.py: embedding column (Vector(768)) added to Contact model
- Migration 0002_embeddings.sql already exists (adds embedding + HNSW index)
- ContactSearchProvider already queries embedding column

5.4 Search Coverage:
- 5 new search providers: task, contactperson, tag, conversation, user
- All providers implement FTS search with tenant_id + deleted_at filters
- TagSearchProvider also supports vector search (384-dim embedding)
- provider_registry.py: all 5 new providers auto-registered
- Total: 10 search providers (was 5)

app/plugins/builtins/permissions/plugin.py

@@ -22,9 +22,10 @@ class PermissionsPlugin(BasePlugin):
                 router_attr="router",
             ),
             PluginRouteDef(
-                path="/api/public",
-                module="app.plugins.builtins.permissions.routes",
-                router_attr="public_router",
+                path="/api/v1/public/share",
+                module="app.plugins.builtins.permissions.public_routes",
+                router_attr="router",
+                is_public=True,
             ),
         ],
         events=[],