Provider video URLs can expire before users finish composing, and the bottom composer was too visually dominant for canvas work. This change keeps remote videos playable while background-localizing them, teaches video previews to use the media proxy, makes audio nodes first-class in the composer and executor, and adds a compact composer state for canvas visibility.
Constraint: Provider media URLs may be remote, signed, or CORS-restricted during playback and thumbnail extraction
Constraint: Audio generation nodes need to work from their internal prompt as well as connected text
Rejected: Store only provider URLs | remote URLs can expire and break later playback
Rejected: Treat audio nodes as unsupported composer nodes | it falls back to the image model and corrupts user intent
Confidence: high
Scope-risk: moderate
Reversibility: clean
Directive: Keep provider media playable through the resolver/proxy path and preserve local refs as the durable source when available
Tested: npm run test:run
Tested: npm run test:run -- src/components/__tests__/GenerationComposer.test.tsx src/store/execution/__tests__/generateAudioExecutor.test.ts src/store/execution/__tests__/generateVideoExecutor.test.ts src/components/__tests__/VideoStitchNode.test.tsx src/components/__tests__/GenerateVideoNode.test.tsx
Tested: npm run build
Not-tested: npm run lint currently fails because next lint is not supported by this Next.js setup
Not-tested: npx tsc --noEmit still reports pre-existing test typing errors outside this change
jiajia
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