Switch news service from Google News to local SearXNG

- Use local SearXNG at localhost:8888 instead of Google News RSS
- No more 302 redirects or blocked requests — local is fast and reliable
- 5s timeout on all SearXNG requests
- Removed async locks (no contention needed for local service)
- Re-enabled research and headlines

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/main.py

@@ -921,9 +921,8 @@ async def start_call(caller_key: str):
     session.start_call(caller_key)
     caller = session.caller  # This generates the background if needed
 
-    # Headlines fetch disabled — Google News RSS blocks automated requests
-    # if not session.news_headlines:
-    #     asyncio.create_task(_fetch_session_headlines())
+    if not session.news_headlines:
+        asyncio.create_task(_fetch_session_headlines())
 
     return {
         "status": "connected",
@@ -1078,8 +1077,7 @@ async def chat(request: ChatRequest):
 
     epoch = _session_epoch
     session.add_message("user", request.text)
-    # Research disabled — was causing hangs and producing garbage searches
-    # session._research_task = asyncio.create_task(_background_research(request.text))
+    session._research_task = asyncio.create_task(_background_research(request.text))
 
     try:
         async with asyncio.timeout(20):
@@ -1676,8 +1674,7 @@ async def _trigger_ai_auto_respond(accumulated_text: str):
 
     broadcast_event("ai_done")
 
-    # Research disabled — was causing hangs
-    # session._research_task = asyncio.create_task(_background_research(accumulated_text))
+    session._research_task = asyncio.create_task(_background_research(accumulated_text))
 
     # Also stream to active real caller so they hear the AI
     if session.active_real_caller: