Fix production issues: add matplotlib dep, fix get_db calls, resolve ESLint

- Add matplotlib>=3.7.0 to requirements-podcast.txt (B-roll requires it)
- Fix research.py and exa_provider.py using get_session_for_user() instead of broken Depends(get_db)
- Fix BrollInfoPanel.tsx: call useScriptEditor hook unconditionally
- Add debug logging to avatar endpoint for troubleshooting

backend/api/onboarding_utils/step4_asset_routes.py

@@ -86,6 +86,8 @@ async def get_latest_avatar(
     try:
         user_id = _extract_user_id(current_user)
         
+        logger.info(f"[latest-avatar] Looking for avatar for user_id: {user_id}")
+        
         # Search for assets that are either:
         # 1. Saved with source_module=BRAND_AVATAR_GENERATOR (new)
         # 2. Saved with source_module=STORY_WRITER but have metadata category='brand_avatar' (legacy)
@@ -100,6 +102,8 @@ async def get_latest_avatar(
             ])
         ).order_by(desc(ContentAsset.created_at)).limit(50).all()
         
+        logger.info(f"[latest-avatar] Found {len(candidates)} candidate(s)")
+        
         asset = None
         for candidate in candidates:
             # Check for direct match (new assets)

backend/api/podcast/handlers/research.py

@@ -63,6 +63,7 @@ def _build_research_cost_estimate(
     raw_content: str,
     sources_count: int,
     provider_result: Dict[str, Any],
+    user_id: str = "default",
 ) -> PodcastCostEst:
     # Fallback defaults mirror current catalog defaults.
     exa_per_request = 0.005
@@ -70,17 +71,19 @@ def _build_research_cost_estimate(
     gemini_out_token = 0.0000006
 
     try:
-        db = next(get_db())
-        try:
-            pricing_service = PricingService(db)
-            exa_per_request = _get_price_from_catalog(
-                pricing_service, APIProvider.EXA, "exa-search", "cost_per_request", exa_per_request
-            )
-            gemini_pricing = pricing_service.get_pricing_for_provider_model(APIProvider.GEMINI, "gemini-2.5-flash") or {}
-            gemini_in_token = float(gemini_pricing.get("cost_per_input_token") or gemini_in_token)
-            gemini_out_token = float(gemini_pricing.get("cost_per_output_token") or gemini_out_token)
-        finally:
-            db.close()
+        from services.database import get_session_for_user
+        db = get_session_for_user(user_id)
+        if db:
+            try:
+                pricing_service = PricingService(db)
+                exa_per_request = _get_price_from_catalog(
+                    pricing_service, APIProvider.EXA, "exa-search", "cost_per_request", exa_per_request
+                )
+                gemini_pricing = pricing_service.get_pricing_for_provider_model(APIProvider.GEMINI, "gemini-2.5-flash") or {}
+                gemini_in_token = float(gemini_pricing.get("cost_per_input_token") or gemini_in_token)
+                gemini_out_token = float(gemini_pricing.get("cost_per_output_token") or gemini_out_token)
+            finally:
+                db.close()
     except Exception as pricing_err:
         logger.warning(f"[Podcast Research] Failed loading pricing catalog; using defaults: {pricing_err}")
 
@@ -431,6 +434,7 @@ QUALITY STANDARDS:
             raw_content=raw_content,
             sources_count=len(sources_payload),
             provider_result=result if isinstance(result, dict) else {},
+            user_id=user_id,
         ),
         search_type=result.get("search_type") if isinstance(result, dict) else None,
         provider=result.get("provider", "exa") if isinstance(result, dict) else "exa",