docs: record composer height merge scope

.project-docs/30-worklog/tasks/20260930-merge-composer-height-73ac902f.md

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+# Task: Merge teacher composer height and clean completed worktrees
+
+## Identity
+
+- Task ID: 20260930-merge-composer-height-73ac902f
+- Mode: Feature
+- Branch: codex/20260930-merge-composer-height-73ac902f-merge-composer-height
+- Worktree: /Users/chillishark/Makelore 麦洛/.codex-worktrees/makelore/20260930-merge-composer-height-73ac902f
+- Base commit: 8a482465d9ded9ae612c515513fc61d687a441e5
+- Owner: codex
+- Status: In Progress
+
+## Scope
+
+- Merge the completed teacher composer height source `54aa426` (product commit `66cad87`) into current main, and remove this conversation's completed source/merge checkouts, including the previously retained legacy merge-composer-actions checkout.
+
+## Intent And Constraints
+
+- User explicitly authorizes both merge and removal of previously retained workspaces, preserving branches and commits. Preserve current colored shortcuts, side navigation, drafts and Main-owned project conversation behavior. Do not add attachments. No remote push or live-app refresh requested; the running trial already has the change. Leave unrelated or actively reused worktrees alone.
+
+## Outcome
+
+- Not completed.
+
+## Verification
+
+- Not run.
+
+## Follow-ups
+
+- None recorded.
+
+## Promotion Candidates
+
+- None recorded.
+
+## Project Context Loaded
+
+- Task ID: 20260930-merge-composer-height-73ac902f. Feature mode, branch/worktree/base as above. Official start/status confirms exclusive ownership and task reservation. App worktree creation returned Not a git repository because this chat is rooted at the parent folder; used the official task-context fallback to create the isolated managed checkout.
+- Read AGENTS, entry, memory index, own record, positioning, current integrated snapshot, decisions/teacher ADR, architecture, domain/success criteria, evidence/reflection/commitment indexes and source outcome. Shared memory is historical; README, actual Git state and current explicit user instructions govern this presentation-only merge. No canonical reconciliation or semantic decision changes are required.
+- Fetched origin: main and origin/main both `8a482465d9ded9ae612c515513fc61d687a441e5` at task start, including latest colored shortcut styling. Merge-tree preview with source `54aa426` succeeds without conflicts. Relevant product boundary remains Renderer presentation; Main owns conversation state, requests and runtime.
+- Read-only review of all 27 other registered task records found no semantic conflict. Sidebar task can overlap CSS but has independent navigation behavior. The old child-language planning record is unspecified and unrelated. Preserve all active/reused worktrees.
+- Confirmed from this conversation's previous cleanup final that the retained checkout is `20260929-merge-composer-actions-23414dc2`, now reused by this task's height source. Its unmanaged flag reflects the known creation-registration failure. User now explicitly requests removal of that previously retained directory; perform manual eligibility review without changing its managed flag. The older window-close directory has since been reused by other work and is not automatically a cleanup candidate.
+- Gate: Passed.
+
+## Plan
+
+1. Merge source onto the fetched main base; verify scoped product diff, typecheck, relevant composer tests and production build.
+2. Fast-forward the clean main checkout only after rechecking current main/remote state; retain all branches/commits.
+3. Review process/dependency links and ignored files; use official retirement for managed checkouts. For explicitly requested legacy cleanup use verified Git worktree removal after official registry release when app archival cannot address this unattached checkout. Keep records of exact removed/retained paths.