feat: Add enhanced analytics dashboard with advanced visualizations

- Created EnhancedInsightsDashboard with multiple chart types:
  - Area charts with gradients for activity trends
  - Radar chart for weekly activity patterns
  - 24-hour heatmap visualization
  - Bubble/scatter chart for correlations
  - Time of day distribution bar chart
- Added toggle between basic and enhanced chart views
- Implemented chart export functionality (PNG/PDF)
- Fixed API endpoint URLs (circadian-rhythm, query params)
- Fixed component library conflicts (shadcn/ui → MUI)
- Added comprehensive null safety for timestamp handling
- Added alert type translations in all 5 languages
- Installed html2canvas and jspdf for export features
- Applied consistent minimum width styling to all charts

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

maternal-web/lib/api/analytics.ts

@@ -397,7 +397,7 @@ export const analyticsApi = {
 
   // Get circadian rhythm analysis
   getCircadianRhythm: async (childId: string, days: number = 14): Promise<CircadianRhythm> => {
-    const response = await apiClient.get(`/api/v1/analytics/advanced/circadian/${childId}`, {
+    const response = await apiClient.get(`/api/v1/analytics/advanced/circadian-rhythm/${childId}`, {
       params: { days },
     });
     return response.data.data;
@@ -443,7 +443,7 @@ export const analyticsApi = {
   // Get trend analysis
   getTrends: async (childId: string, activityType: string): Promise<TrendAnalysis> => {
     const response = await apiClient.get(`/api/v1/analytics/advanced/trends/${childId}`, {
-      params: { activityType },
+      params: { type: activityType },
     });
     const data = response.data.data;