docs: finalize AI design session freeze promotion

.project-docs/30-worklog/tasks/20260819-finalize-session-freeze-9d4a.md

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+# Task: Finalize AI design session freeze promotion
+
+## Identity
+
+- Task ID: 20260819-finalize-session-freeze-9d4a
+- Mode: Integration
+- Branch: main
+- Worktree: D:\Datas\OthersProjects\makelore
+- Base commit: 803e3d81739ae856d2a3a77496e4b71af8a06842
+- Owner: codex-root
+- Status: Ready for integration
+
+## Scope
+
+- Finalize the user-authorized promotion of the reviewed AI Design rapid Conversation-switching fix, already present at canonical `main` `803e3d8`.
+- Record the completed promotion and its canonical verification without changing product behavior or rewriting existing history.
+
+## Intent And Constraints
+
+- Operate in an exclusively owned Integration Gate worktree with the integration lock.
+- Keep the source feature task and prior integration task records read-only; this task records only the final promotion evidence.
+- Leave `main` clean and ahead of `origin/main` by the intended local integration commits; publishing remains a separate release action.
+
+## Outcome
+
+- `main` was fast-forwarded from `31332f6` to `803e3d8` after explicit user authorization to take over the clean worktree. No existing commit was reset, overwritten, or conflicted.
+
+## Verification
+
+- `check_project_docs.py --target .` passed before promotion.
+- `git merge-base --is-ancestor 31332f6 803e3d8` passed and `git merge --ff-only 803e3d8` completed successfully.
+- Canonical `main`: `tests/unit/image-workspace-store.test.ts` 31/31; `tests/unit/image-canvas-page.test.tsx` plus `tests/unit/works-square-design-workspace.test.ts` 79/79; scoped ESLint; TypeScript `--noEmit` all passed.
+- Existing React `act(...)` warnings appeared in the adjacent Canvas test and did not fail the suite.
+- Final task-aware documentation drift, `git diff --check`, and clean-worktree checks will run after this record is committed.
+
+## Follow-ups
+
+- Run the real logged-in Electron slow-handshake Conversation-switching smoke from the source task; local tests do not claim production gateway behavior.
+- Publish local `main` commits through the normal repository review/release process when desired.
+
+## Promotion Candidates
+
+- None. The reviewed fix is now present on canonical `main` and restores the existing stream-lifecycle invariant.