feat(b2b-marketing): Finalize grounding architecture and frontend improvements

- Upgrade backend to use gemini-2.5-flash with sanitized HTML parsing (no token limit).
- Implement robust retry logic and increased timeouts (600s) for deep analysis.
- Add file-based logging for prompts and responses.
- Fix API endpoint (v1) and regex parsing issues.
- Frontend: Optimize PDF export (landscape, no scrollbars), fix copy-paste button, add 'Repeat Step 6' feature.
- Update documentation to 'Completed' status.

b2b-marketing-assistant/package.json

@@ -6,17 +6,24 @@
   "scripts": {
     "dev": "vite",
     "build": "vite build",
-    "preview": "vite preview"
+    "preview": "vite preview",
+    "start-backend": "node server.cjs"
   },
   "dependencies": {
-    "react-dom": "^19.2.0",
-    "@google/genai": "^1.28.0",
-    "react": "^19.2.0"
+    "body-parser": "^1.20.2",
+    "cors": "^2.8.5",
+    "express": "^4.18.2",
+    "react": "^18.2.0",
+    "react-dom": "^18.2.0"
   },
   "devDependencies": {
-    "@types/node": "^22.14.0",
-    "@vitejs/plugin-react": "^5.0.0",
-    "typescript": "~5.8.2",
-    "vite": "^6.2.0"
+    "@types/cors": "^2.8.17",
+    "@types/express": "^4.17.21",
+    "@types/node": "^20.10.4",
+    "@types/react": "^18.2.43",
+    "@types/react-dom": "^18.2.17",
+    "@vitejs/plugin-react": "^4.2.1",
+    "typescript": "^5.2.2",
+    "vite": "^5.0.8"
   }
-}
+}