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/services/blogWriterApi.ts

@@ -589,11 +589,8 @@ export interface AssistiveSuggestionResponse {
 }
 
 export const assistiveWritingApi = {
-  async getSuggestion(text: string, maxResults: number = 1): Promise<AssistiveSuggestionResponse> {
-    const { data } = await aiApiClient.post('/api/writing-assistant/suggest', {
-      text,
-      max_results: maxResults
-    });
+  async getSuggestion(text: string): Promise<AssistiveSuggestionResponse> {
+    const { data } = await aiApiClient.post('/api/writing-assistant/suggest', { text });
     return data;
   }
 };