fix: WYSIWYG editor, content generation, and writing assistant bug fixes

- Fix text selection menu not showing: wire contentRef via inputRef on multiline TextField
- Fix blog title not truncating: add min-w-0 for flex item overflow
- Fix outline generation 500: escape curly braces in f-string prompt template
- Fix content generation 'NoneType not callable': replace SessionLocal() with get_session_for_user(), add db param to MediumBlogGenerator, fix signature mismatch in database_task_manager
- Fix writing assistant suggest 500: add auth + user_id to API endpoint and service, replace sync requests with httpx.AsyncClient
- Fix hallucination detector 404: explicitly include router in main.py and app.py
- Fix missing error_data in task failure responses
- Hide CopilotKit web inspector button
- Remove hardcoded fallback suggestions from SmartTypingAssist
- Fix stale closure refs in SmartTypingAssist handleTypingChange
- Add two-column editor layout, stats bar, section hover menu
- Various subscription, billing, and research module improvements

frontend/src/components/Pricing/PricingPage/PlanCard.tsx

@@ -61,6 +61,8 @@ interface SubscriptionPlan {
     video_calls?: number;
     audio_calls?: number;
     ai_text_generation_calls_limit?: number;
+    exa_calls?: number;
+    wavespeed_calls?: number;
   };
 }
 
@@ -864,6 +866,32 @@ const PlanCard: React.FC<PlanCardProps> = ({
             </ListItem>
           )}
 
+          {(plan.limits.exa_calls ?? 0) > 0 && (
+            <ListItem>
+              <ListItemIcon sx={{ minWidth: 24 }}>
+                <SearchIcon color="primary" fontSize="small" />
+              </ListItemIcon>
+              <ListItemText
+                primary={`${plan.limits.exa_calls} Exa AI Searches`}
+                secondary="AI-powered search and content discovery"
+                sx={{ '& .MuiListItemText-primary': { fontSize: '0.875rem' } }}
+              />
+            </ListItem>
+          )}
+
+          {(plan.limits.wavespeed_calls ?? 0) > 0 && (
+            <ListItem>
+              <ListItemIcon sx={{ minWidth: 24 }}>
+                <AudioIcon color="primary" fontSize="small" />
+              </ListItemIcon>
+              <ListItemText
+                primary={`${plan.limits.wavespeed_calls} WaveSpeed AI Calls`}
+                secondary="TTS, video, image, and LLM via Minimax"
+                sx={{ '& .MuiListItemText-primary': { fontSize: '0.875rem' } }}
+              />
+            </ListItem>
+          )}
+
           {plan.limits.monthly_cost > 0 && (
             <ListItem>
               <ListItemIcon sx={{ minWidth: 24 }}>