Remove unused components and clean up codebase

- Remove orchestrator.tsx and orchestrator-messages-view.tsx
- Remove conversation-selector.tsx
- Remove thinking-sheet.tsx and agent-thought-content.tsx
- Remove home-header.tsx
- Update message.tsx and agent-stream-view.tsx
- Add tool call detail improvements
- Add lz-string dependency for compression

package.json

@@ -30,6 +30,7 @@
   "devDependencies": {
     "concurrently": "^9.2.1",
     "get-port-cli": "^3.0.0",
+    "knip": "^5.82.1",
     "patch-package": "^8.0.1",
     "typescript": "^5.9.3"
   },