Migration lego-hunter to Tinyfish SDK

[KrishnaAgarwal7531]

Migrates Lego Restock Hunter from OpenAI-based URL generation to the TinyFish SDK, removing the @ai-sdk/openai and ai dependencies entirely.
The original generate-urls route used GPT-4o-mini to hallucinate search URLs for 15 hardcoded retailers — results were often wrong or outdated. The new /api/discover-retailers runs two parallel TinyFish Search queries targeted at the specific LEGO set name, finding real current product pages across retailers without any LLM involvement.
/api/search-lego replaces the raw Mino SSE fetch with client.agent.stream — typed EventType.STREAMING_URL, EventType.PROGRESS, EventType.COMPLETE + RunStatus.COMPLETED, with result content validation. Deal analysis is now built-in price sorting logic rather than a second GPT-4o-mini call — no LLM needed to determine which price is lower.

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[simantak-dabhade]

Thanks for the migration @KrishnaAgarwal7531! SDK integration looks solid — client.agent.stream() with parallel Promise.allSettled, client.search.query() for retailer discovery.

Blocker: build fails — TypeScript error

npm run build fails:

./app/api/search-lego/route.ts:98:49
Type error: Property 'replace' does not exist on type 'never'.

The SDK types CompleteEvent.result as Record<string, unknown> | null (never string). The typeof raw === "string" branch on line 96 narrows to never, and .replace() fails. Please fix so the build passes.

Minor (non-blocking)

1. Stale comment — route.ts:141 says // Analyze best deal from results using Groq but the code is pure in-memory price comparison (no Groq involved).

What looks good ✓

• SDK usage: client.agent.stream(), client.search.query(), proper EventType/RunStatus
• SDK instantiated inside handlers, not module-level
• .env.example correct with canonical URL
• README accurate
• No Groq, no Mino, no hardcoded secrets
• Clean UI — no shadcn boilerplate dump