- fix optimizeDayOrder() dual-update: directly set days[dayIndex].items + days before
saveReorderedItems() so it reads the correct post-optimization order synchronously
(Svelte 4 batches reactive statements; days wasn't updated before save read it)
- also patch collection.itinerary order values so reactive rebuild uses new order
- replace single google_maps <option> with 8 AI LLM provider options
(anthropic, openai, gemini, ollama, groq, mistral, github_models, openrouter)
- add getApiKeyProviderLabel() helper for saved key display with google_maps fallback
- add i18n keys for all new provider labels in en.json and de.json
alex
d4e0ef14b8