feat(ai): implement intelligent auto-tagging system

- Added multi-provider AI infrastructure (OpenAI/Ollama)
- Implemented real-time tag suggestions with debounced analysis
- Created AI diagnostics and database maintenance tools in Settings
- Added automated garbage collection for orphan labels
- Refined UX with deterministic color hashing and interactive ghost tags

keep-notes/package.json

@@ -11,6 +11,7 @@
     "test:headed": "playwright test --headed"
   },
   "dependencies": {
+    "@ai-sdk/openai": "^3.0.7",
     "@auth/prisma-adapter": "^2.11.1",
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/sortable": "^10.0.0",
@@ -26,6 +27,7 @@
     "@radix-ui/react-separator": "^1.1.8",
     "@radix-ui/react-slot": "^1.2.4",
     "@radix-ui/react-tooltip": "^1.2.8",
+    "ai": "^6.0.23",
     "bcryptjs": "^3.0.3",
     "better-sqlite3": "^12.5.0",
     "cheerio": "^1.1.2",
@@ -37,6 +39,7 @@
     "muuri": "^0.9.5",
     "next": "16.1.1",
     "next-auth": "^5.0.0-beta.30",
+    "ollama-ai-provider": "^1.2.0",
     "prisma": "^5.22.0",
     "react": "19.2.3",
     "react-dom": "19.2.3",