feat: add site assistant component for guided tool selection

- Introduced SiteAssistant component to assist users in selecting the right tools based on their queries.
- Integrated assistant into the main App component.
- Implemented message handling and storage for user-assistant interactions.
- Added quick prompts for common user queries related to tools.
- Enhanced ToolLandingPage and DownloadButton components with SharePanel for sharing tool results.
- Updated translations for new assistant features and sharing options.
- Added API methods for chat functionality with the assistant, including streaming responses.

backend/app/__init__.py

@@ -8,6 +8,7 @@ from app.extensions import cors, limiter, talisman, init_celery
 from app.services.account_service import init_account_db
 from app.services.rating_service import init_ratings_db
 from app.services.ai_cost_service import init_ai_cost_db
+from app.services.site_assistant_service import init_site_assistant_db
 
 
 def create_app(config_name=None):
@@ -77,6 +78,7 @@ def create_app(config_name=None):
         init_account_db()
         init_ratings_db()
         init_ai_cost_db()
+        init_site_assistant_db()
 
     # Register blueprints
     from app.routes.health import health_bp
@@ -103,6 +105,7 @@ def create_app(config_name=None):
     from app.routes.html_to_pdf import html_to_pdf_bp
     from app.routes.pdf_ai import pdf_ai_bp
     from app.routes.rating import rating_bp
+    from app.routes.assistant import assistant_bp
 
     app.register_blueprint(health_bp, url_prefix="/api")
     app.register_blueprint(auth_bp, url_prefix="/api/auth")
@@ -128,5 +131,6 @@ def create_app(config_name=None):
     app.register_blueprint(html_to_pdf_bp, url_prefix="/api/convert")
     app.register_blueprint(pdf_ai_bp, url_prefix="/api/pdf-ai")
     app.register_blueprint(rating_bp, url_prefix="/api/ratings")
+    app.register_blueprint(assistant_bp, url_prefix="/api/assistant")
 
     return app