Chat page:
- Move session selector, refresh, thinking toggle to the Header bar
(same level as "Chat" title) instead of inside the chat content area
- Add "New Session" button (+ icon) to create fresh chat sessions
- Remove duplicate toolbar from chat body
Settings page:
- Remove max-w-2xl constraint so cards fill available width
- Redesign provider cards: compact layout with key + actions in one row
- Shorten API key display (sk-...df67 format instead of full masked key)
- Move edit/delete/star buttons inside the key row background area
- Remove duplicate "AI Providers" heading (already in card header)
- Replace mock API key validation with actual API calls to verify keys
- Add validateApiKeyWithProvider() with provider-specific implementations
- Support Anthropic, OpenAI, Google, and OpenRouter validation
- Add OpenRouter as a new provider option in setup wizard and settings
- Fix setup page to call real validation instead of mock length check
- Allow validation during setup before provider is saved
- Return user-friendly error messages instead of raw API errors
Add complete provider configuration system with the following features:
- Secure API key storage using Electron's safeStorage encryption
- Provider CRUD operations with IPC handlers
- Lazy-loaded electron-store for ESM compatibility
- Provider settings UI component with add/edit/delete functionality
- API key masking for display (shows first/last 4 chars)
- Basic API key format validation per provider type
- Default provider selection
- Provider enable/disable toggle
New files:
- electron/utils/secure-storage.ts: Encrypted key storage and provider config
- src/stores/providers.ts: Zustand store for provider state
- src/components/settings/ProvidersSettings.tsx: Provider management UI
