Support search_web boolean flag to bypass live web search

src/core/domain/schemas.py

@@ -8,6 +8,7 @@ class ChatRequest(BaseModel):
     top_k: int = 7          # increased from 5 — gives multilingual diversity room
     source_filter: Optional[str] = None
     language_filter: Optional[str] = None
+    search_web: bool = True
     
 class SourceDocument(BaseModel):
     content: str

src/core/use_cases/rag_chat_use_case.py

@@ -385,7 +385,7 @@ JSON:"""
             logger.warning(f"[RAG] [{lang_code}] search failed: {e}")
             return []
 
-    async def _build_context(self, query: str, top_k: int, source_filter=None, language_filter=None, days_back=None) -> Tuple[str, List[Dict[str, Any]]]:
+    async def _build_context(self, query: str, top_k: int, source_filter=None, language_filter=None, days_back=None, search_web: bool = True) -> Tuple[str, List[Dict[str, Any]]]:
         # ── Step 0: Language Detection & Query Enhancement ────────────────────
         original_query = query
         query_language = "en"  # Default
@@ -510,6 +510,11 @@ JSON:"""
             
             # Decide search strategy (pass full intent_result for v2)
             strategy = self.orchestrator.decide_search_strategy(query, intent, intent_result)
+            if not search_web:
+                strategy.use_live = False
+                strategy.live_weight = 0.0
+                strategy.db_weight = 1.0
+                strategy.reason = "Web search toggled off by user"
             logger.info(f"[RAG] Search strategy: {strategy}")
             
             # If intent is OTHER (small talk), skip search entirely
@@ -914,7 +919,8 @@ JSON:"""
             request.top_k,
             request.source_filter,
             request.language_filter,
-            getattr(request, 'days_back', None)
+            getattr(request, 'days_back', None),
+            search_web=getattr(request, 'search_web', True)
         )
 
         # Optional Trend Fusion - Disabled for testing
@@ -1067,7 +1073,12 @@ Answer:"""
         session_id = request.session_id
         history_text = "" if is_guest else self._get_history_text(session_id)
         context_text, final_sources = await self._build_context(
-            request.query, request.top_k, request.source_filter, request.language_filter, getattr(request, 'days_back', None)
+            request.query, 
+            request.top_k, 
+            request.source_filter, 
+            request.language_filter, 
+            getattr(request, 'days_back', None),
+            search_web=getattr(request, 'search_web', True)
         )
 
         # ── Build numbered source index for citations ─────────────────────────