v0.1.1: System default AI config, configurable URLs, single .env, website refactor

AGENTS.md

@@ -78,6 +78,12 @@ id, userId, date, type, content, mediaPath, metadata, latitude, longitude, place
 - Location is captured automatically from browser geolocation when creating events
 - Reverse geocoding via OpenStreetMap Nominatim API provides place names
 
+### Settings Model
+```
+userId, aiProvider, aiApiKey, aiModel, aiBaseUrl, journalPrompt, language, timezone, providerSettings, journalContextDays, useSystemDefault
+```
+- `useSystemDefault`: When true, user uses system-default AI settings from environment variables
+
 ## API Design
 
 All endpoints return: `{ data: T | null, error: { code, message } | null }`
@@ -146,6 +152,18 @@ AI is configured to return JSON with `response_format: { type: "json_object" }`
 ### Provider Settings Storage
 Settings stored as `providerSettings: { "groq": { apiKey, model, baseUrl }, ... }` with `aiProvider` determining which is active.
 
+### System Default AI Configuration
+Administrators can configure default AI settings via environment variables that apply to all new users:
+```
+BACKEND_DEFAULT_AI_PROVIDER="groq"
+BACKEND_DEFAULT_AI_MODEL="llama-3.3-70b-versatile"
+BACKEND_DEFAULT_AI_API_KEY=""
+BACKEND_DEFAULT_AI_BASE_URL=""
+```
+- New users automatically use system defaults (`useSystemDefault: true`)
+- Users can override with their own settings by unchecking "Use system default settings"
+- When `useSystemDefault` is true, the system ignores user's individual AI settings and uses env defaults
+
 ## Coding Guidelines
 
 ### TypeScript
@@ -206,6 +224,7 @@ bun run test:server
 Tests require the server running. The test script starts the server, runs tests, then stops it.
 
 ## Version History
+- 0.1.1: System default AI configuration via env vars, "Use system default" checkbox in settings
 - 0.1.0: Automatic geolocation capture, Starlight documentation site
 - 0.0.6: Automatic geolocation capture on event creation, reverse geocoding to place names
 - 0.0.5: Export/Import feature with version checking