Extract catalog, harden AI recommend API with strict matching and local fallback

[FenjuFu]

Motivation

• Centralize the static candidate data and reuse the same catalog across UI and API to avoid duplication and accidental divergence.
• Prevent the AI model from inventing restaurants by strictly constraining model output to the local candidate set and provide robust local fallbacks when the AI fails.
• Improve client UX by showing local recommendations and clearer error messaging when the AI service is unavailable.
• Avoid inadvertently disabling API routes during normal builds by making static export opt-in via STATIC_EXPORT.

Description

• Add lib/bitesCatalog.ts which exports BITES_CATALOG, types BitesRestaurant and AccessibilityFilter, and a reusable filterBitesCatalog function for filtering by location and accessibility.
• Update app/api/ai/recommend/route.ts to use the new catalog/types, parse request body safely, call the chat model, strictly enforce matching model recommendations to the local catalog via enforceCatalog, and return a local fallback (filterBitesCatalog) when parsing/modeling fails or returns no matches.
• Improve JSON parsing resilience with safeParseJson and stronger typing for model responses (ModelRecommendation) and request body (RecommendRequestBody).
• Update components/FoodAIDialog.tsx to import filterBitesCatalog, handle AI fallback on the client by showing local recommendations and a friendly error message, and display the raw error message when appropriate.
• Make next.config.ts only enable static output: 'export' when STATIC_EXPORT=true to avoid disabling API routes by default.

Testing

• Ran TypeScript type checking and a Next.js dev build locally, and both completed successfully.
• Exercised the AI recommend API endpoint with valid and malformed request bodies to verify fallbacks, and verified client dialog shows local recommendations when AI response is empty or the request fails; these checks succeeded.
• No changes to existing automated unit test suites were required and no new unit tests were added in this PR.

---

Codex Task

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
good-action-hub	Ready	Preview, Comment	Mar 6, 2026 1:12pm

[netlify]

✅ Deploy Preview for goodaction-hub ready!

Name	Link
🔨 Latest commit	469343a
🔍 Latest deploy log	https://app.netlify.com/projects/goodaction-hub/deploys/69aad29326d52000085418e6
😎 Deploy Preview	https://deploy-preview-6--goodaction-hub.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.