feat: v0.1.0 - geolocation capture, calendar, search, Starlight docs site

- Automatic browser geolocation capture on event creation
- Reverse geocoding via Nominatim API for place names
- Full-text search with SQLite FTS5
- Calendar view for browsing past entries
- DateNavigator component for day navigation
- SearchModal with Ctrl+K shortcut
- QuickAddWidget with Ctrl+J shortcut
- Starlight documentation site with GitHub Pages deployment
- Multiple AI provider support (Groq, OpenAI, Anthropic, Ollama, LM Studio)
- Multi-user registration support

BREAKING: Events now include latitude/longitude/placeName fields

backend/src/services/ai/provider.ts

@@ -1,12 +1,13 @@
 export interface AIProviderResult {
   content: string;
+  title?: string;
   request: Record<string, unknown>;
   response: Record<string, unknown>;
 }
 
 export interface AIProvider {
   provider: 'openai' | 'anthropic' | 'ollama' | 'lmstudio' | 'groq';
-  generate(prompt: string, systemPrompt?: string): Promise<AIProviderResult>;
+  generate(prompt: string, systemPrompt?: string, options?: { jsonMode?: boolean }): Promise<AIProviderResult>;
   validate?(): Promise<boolean>;
 }