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/ImageStudio/AssetLibrary.tsx

@@ -37,6 +37,7 @@ import {
   Warning,
 } from '@mui/icons-material';
 import { ImageStudioLayout } from './ImageStudioLayout';
+import { DashboardHeaderProps } from '../shared/types';
 import { useContentAssets, AssetFilters, ContentAsset } from '../../hooks/useContentAssets';
 import { intentResearchApi } from '../../api/intentResearchApi';
 import { AssetFilters as AssetFiltersComponent } from './AssetLibraryComponents/AssetFilters';
@@ -127,6 +128,29 @@ export const AssetLibrary: React.FC = () => {
     return baseFilters;
   }, [debouncedSearch, idSearch, modelSearch, filterType, tabValue, page, pageSize, urlSourceModule]);
 
+  const headerProps: DashboardHeaderProps | undefined = useMemo(() => {
+    if (!urlSourceModule) return undefined;
+    switch (urlSourceModule) {
+      case 'blog_writer':
+        return {
+          title: 'Blog Posts',
+          subtitle: 'Manage and review your published blog posts.',
+        };
+      case 'research_tools':
+        return {
+          title: 'Research Documents',
+          subtitle: 'Access and manage your research projects.',
+        };
+      case 'product_marketing':
+        return {
+          title: 'Marketing Assets',
+          subtitle: 'Marketing content generated by Product Marketing tools.',
+        };
+      default:
+        return undefined;
+    }
+  }, [urlSourceModule]);
+
   const { assets, loading, error, total, toggleFavorite, deleteAsset, trackUsage, refetch } = useContentAssets(filters);
 
   // Refetch assets when component mounts with research_tools filter to show latest drafts
@@ -338,7 +362,7 @@ export const AssetLibrary: React.FC = () => {
   }, [assets, statusFilter, dateFilter]);
 
   return (
-    <ImageStudioLayout>
+    <ImageStudioLayout headerProps={headerProps}>
       <Paper
         elevation={0}
         sx={{
@@ -561,7 +585,13 @@ export const AssetLibrary: React.FC = () => {
                 No assets found
               </Typography>
               <Typography variant="body2">
-                Generated content from all ALwrity tools will appear here.
+                {urlSourceModule === 'blog_writer'
+                  ? 'No blog posts found. Generate your first blog post in Blog Writer.'
+                  : urlSourceModule === 'research_tools'
+                  ? 'No research documents found. Start a new research project.'
+                  : urlSourceModule === 'product_marketing'
+                  ? 'No marketing assets found. Create one in Product Marketing.'
+                  : 'Generated content from all ALwrity tools will appear here.'}
               </Typography>
             </Box>
           ) : viewMode === 'list' ? (