- Enhanced exaSearch service with Exa API + fallback tier system
* Tier 1: Exa API (primary)
* Tier 2: Synthetic results with suggested web sources
* Improved error handling with graceful degradation
- Updated backend exerciseResearch route to return provider info
* Returns 'provider' field identifying which API was used
* Returns 'status' field (success/degraded) for UI feedback
* Better error messages for debugging
- Enhanced ResearchDisplay component with fallback feedback
* New ResearchProviderBadge shows which provider was used
* Visual indicators for fallback results (Suggested badge)
* Support for multiple provider types (exa, fallback, gemini, etc.)
* Improved error handling and recovery flows
- Updated ExerciseResearchPanel with better error handling
* Proper response parsing from backend
* Forwards provider and status info to display component
* Improved accessibility with tooltip hints
- Added comprehensive Research Display styling
* Responsive layout for mobile and desktop
* Visual hierarchy for summaries and sources
* Provider badge styling with color-coding
* Fallback state indicators for user awareness
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