Migration loan-decision-copilot to Tinyfish SDK

[KrishnaAgarwal7531]

Full rewrite from a Vite + Supabase Edge Functions app to Next.js App Router. Supabase is completely removed — no client, no Edge Functions, no VITE_SUPABASE_* env vars. Everything routes through Next.js API routes directly.
The biggest improvement is in discovery: the original discover-banks function called Lovable's AI gateway (Gemini) to hallucinate bank URLs from training data — results were often wrong or outdated. The new /api/discover-banks runs two parallel TinyFish Search queries targeted at the user's specific location, deduplicates by domain, and filters out aggregator sites so only real bank pages reach the agents.
/api/analyze-loan replaces the raw Mino SSE fetch with client.agent.stream — typed EventType.STREAMING_URL, EventType.PROGRESS, EventType.COMPLETE + RunStatus.COMPLETED, with result content validation (COMPLETED status alone is not treated as success). Agents run in parallel via Promise.allSettled and stream results back as each bank finishes.

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[simantak-dabhade]

Hey @KrishnaAgarwal7531, nice migration — the SDK integration pattern is solid (search + parallel stream agents, proper event handling, no module-level instantiation).

Blocker: build fails

npm run build fails with a type error:

src/app/api/analyze-loan/route.ts:89-92

const raw = event.result;
let result =
  typeof raw === "string"
    ? JSON.parse(raw.replace(/```json|```/g, "").trim())
    : raw;

The SDK types CompleteEvent.result as Record<string, unknown> | null, never string. TypeScript narrows raw to never in the string branch, causing:

Type error: Property 'replace' does not exist on type 'never'.

Please fix so the build passes.

What looks good ✓

• @tiny-fish/sdk usage (client.agent.stream, client.search.query)
• No Mino references (old docs file deleted)
• .env.example with correct canonical URL
• README is accurate and thorough
• No groq-sdk, no hardcoded secrets
• No shadcn boilerplate dump — only 4 UI components and all are used
• SDK instantiation inside functions, not module-level