feat: Integrated SQLite database and project history into B2B Marketing Assistant

- market_db_manager.py: Made DB_PATH configurable via environment variable.

- Dockerfile.b2b: Included market_db_manager.py in the B2B container image.

- docker-compose.yml: Configured separate DB paths and volumes for Market Intel and B2B Assistant.

- B2B Server: Added API routes for project management (list, load, save, delete).

- B2B UI: Implemented auto-save and a 'Project History' modal for loading past runs.

docker-compose.yml

@@ -33,12 +33,16 @@ services:
     volumes:
       # Sideloading: Python Logic
       - ./b2b_marketing_orchestrator.py:/app/b2b_marketing_orchestrator.py
+      - ./market_db_manager.py:/app/market_db_manager.py
+      # Database Persistence
+      - ./b2b_projects.db:/app/b2b_projects.db
       # Logs
       - ./Log_from_docker:/app/Log_from_docker
       # Keys
       - ./gemini_api_key.txt:/app/gemini_api_key.txt
     environment:
       - PYTHONUNBUFFERED=1
+      - DB_PATH=/app/b2b_projects.db
     # Port 3002 is internal only
 
   # --- MARKET INTELLIGENCE BACKEND ---
@@ -51,14 +55,18 @@ services:
     volumes:
       # Sideloading: Python Logic & Config
       - ./market_intel_orchestrator.py:/app/market_intel_orchestrator.py
+      - ./market_db_manager.py:/app/market_db_manager.py
       - ./config.py:/app/config.py
       - ./helpers.py:/app/helpers.py
+      # Database Persistence
+      - ./market_intelligence.db:/app/market_intelligence.db
       # Logs & Keys
       - ./Log:/app/Log
       - ./gemini_api_key.txt:/app/gemini_api_key.txt
       - ./serpapikey.txt:/app/serpapikey.txt
     environment:
       - PYTHONUNBUFFERED=1
+      - DB_PATH=/app/market_intelligence.db
     # Port 3001 is internal only
 
   # --- MARKET INTELLIGENCE FRONTEND ---