Enhance Transcript with AI

[google-labs-jules]

Implemented the "Enhance Transcript" feature.

1. Backend:

   • Created app/api/transcript/enhance/route.ts:
     • Validates input using enhanceTranscriptSchema (based on videoInfoSchema and transcriptSchema).
     • Checks for sufficient video credits.
     • Constructs a system prompt for grok-4-1-fast-non-reasoning to clean up text (grammar, filler words) while strictly maintaining a 1:1 segment mapping.
     • Parses the AI response (JSON array of strings) and reconstructs the TranscriptSegment array.
     • Consumes 1 video credit atomically.
     • Updates the transcript column in the video_analyses table.
   • Updated lib/validation.ts: Added optional description field to videoInfoSchema to resolve TypeScript errors and allow passing context to the AI.

2. Frontend:

   • Updated components/transcript-viewer.tsx:
     • Added an "Enhance" button (Sparkles icon) to the header.
     • Added a confirmation dialog explaining the cost (1 credit) and permanence of the action.
     • Added onTranscriptUpdate prop to propagate changes to the parent.
   • Updated components/right-column-tabs.tsx:
     • Passes videoInfo and onTranscriptUpdate down to TranscriptViewer.
   • Updated app/analyze/[videoId]/page.tsx:
     • Implemented onTranscriptUpdate callback to update the local transcript state.
     • Added logic to re-hydrate topics and baseTopics with the new transcript text, resetting character offsets to ensure highlighting still works (albeit less precise until full re-analysis, but functional).

3. Verification:

   • Verified the frontend UI via Playwright screenshot (analyze_page.png), confirming the presence of the "Enhance" button.
   • Verified TypeScript compilation (pnpm tsc --noEmit) passes successfully after updating lib/validation.ts.

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PR created automatically by Jules for task 7610923124901016416 started by @SamuelZ12

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Project	Deployment	Review	Updated (UTC)
tldw	Ready	Preview, Comment	Dec 13, 2025 8:48pm