fix(design): distinguish saved video settings from preparation needs

.project-docs/30-worklog/tasks/20260927-design-video-form-d2b96e41.md

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+# Task: Diagnose stale video form validation messages
+
+## Identity
+
+- Task ID: 20260927-design-video-form-d2b96e41
+- Mode: Feature
+- Branch: codex/20260927-design-video-form-d2b96e41-design-video-form
+- Worktree: D:\Datas\OthersProjects\.codex-worktrees\makelore\20260927-design-video-form-d2b96e41
+- Base commit: 0eed70fa637f70b22be5eda7af400a702ee4a7f2
+- Owner: codex
+- Status: Ready for Integration
+
+## Scope
+
+- Reproduce the visible six-second video duration alongside missing-duration/missing-shots errors through YouthCreationCard and its real store. Own only that form/quote preparation path, focused tests and this record; no navigation, billing or provider changes.
+
+## Intent And Constraints
+
+- Concurrent and Planning Gates Passed: official check/start/status verified the exact isolated feature identity and base above. Read entry, own task, positioning/current integrated snapshot, Design ADR, relevant architecture/domain/evidence/reflection/commitments. Peer task records inspected read-only; historical Design tasks share code paths but retain the same server-owned Specification and prepare-before-quote contract. Placeholder peer scopes remain unknown; no concrete dependency or semantic conflict affects this isolated work. Preserve unrelated dirty root documents and completed draft-diagnosis task. No subagents or live model calls.
+
+## Outcome
+
+- Reproduced the screenshot's contradictory duration display: a canonical null duration rendered as six seconds while video_duration_required remained. Independently reproduced an unsuccessful parameter save retaining the unaccepted optimistic duration.
+- Missing duration now renders an explicit selector populated solely from server-supported durations; quotation remains disabled until selection is saved. Existing accepted durations retain the stepper, including normal video-mode conversion's existing explicit duration write.
+- Parameter controls reconcile to accepted Workspace values after completion or failure, without applying a response to another selected Workspace.
+- video_shots_required remains visible as actionable AI-preparation guidance, not a red instruction for a child to write internal shots. Other compilation blockers remain unchanged; the server's compile/confirm authority is not relaxed.
+- Product ownership: src/pages/ImageCanvas/YouthCreationCard.tsx and youth-issue-copy.ts. Regression ownership: tests/unit/youth-creation-card.test.tsx, tests/e2e/image-workspace-v2.spec.ts and scripts/diagnostics/design-video-flow.test.tsx.
+
+## Verification
+
+- Red evidence: real React component test rendered six seconds for null; a second test rendered the misleading shot error with a valid saved duration; a failed-save test retained seven instead of saved six. Each was run before its correction.
+- pnpm 10.33.4: 71 tests passed across youth-creation-card, image-workspace-store and image-canvas-page. Existing store regression confirms blockers clear only on a new canonical Specification revision; preparation failure still stops quotation.
+- Offline cross-repository flow: 3 passed using real React controls, Zustand commands, server reducer/preparation orchestration/capability compiler, fixture model output and in-memory asset. New incomplete-video case starts with a selected first frame, null duration and no shots, sees the placeholder, saves six seconds, clears the old duration error, prepares one shot, and reaches explicit confirmation. Also reran original image-to-video path and playback projection.
+- Server companion 20260927-design-video-validation-a9e4317b: 10 preparation tests passed.
+- pnpm run typecheck, scoped ESLint, pnpm run build:vite passed. Build reports existing Browserslist age, chunk-size and mixed dynamic/static import warnings.
+- Electron image-workspace-v2 spec: 2 passed, including new duration selection/reload persistence assertions in the existing production-plan flow. Host API/model/provider transport remain fixtures; no paid generation or production database access.
+
+## Follow-ups
+
+- Main is unchanged. This fix needs a client merge and rebuilt client rollout; it requires no server product patch, database migration or environment variable. The separate server Reasoner fix 7799a746699571d71ac0b009d6faa5fd989b501a remains independently ready, not included here.
+- The screenshot alone cannot prove the deployed Workspace's exact stored duration or that a save failed; the supported code paths and matching contradiction were reproduced locally. Real-account installed-client generation is not claimed.
+
+## Promotion Candidates
+
+- Target: ADR-007/README video UI clarification during integration. Proposal: an absent duration must never look accepted, rejected edits must reconcile to accepted state, and AI-owned motion preparation must not be phrased as user-required internal shots. Evidence: red/green component tests, paired offline compiler flow and Electron persistence test. Future impact: preserve the existing single Specification authority and prepare-before-quote contract; no semantic conflict or new product-direction decision.