docs: record teacher introduction merge scope

.project-docs/30-worklog/tasks/20260929-teacher-intro-merge-e8f30c62.md

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+# Task: Merge grouped teacher introductions into main
+
+## Identity
+
+- Task ID: 20260929-teacher-intro-merge-e8f30c62
+- Mode: Feature
+- Branch: codex/20260929-teacher-intro-merge-e8f30c62-teacher-intro-merge
+- Worktree: /Users/chillishark/Makelore 麦洛/.codex-worktrees/makelore/20260929-teacher-intro-merge-e8f30c62
+- Base commit: 1c07f7b5cb58e383e64994669a9e1d36732cb09e
+- Owner: codex
+- Status: Planning
+
+## Scope
+
+- Merge approved grouped introductions from 7458c37 into latest origin/main 1c07f7b, preserve teacher streaming and all unrelated main behavior, validate and fast-forward the local main checkout.
+
+## Intent And Constraints
+
+- User authorizes main merge and conflict resolution. No new remote push, cloud release, application restart, paid model calls, subagents or checkout deletion. Source task records remain byte-identical; canonical project docs are read-only because the registered canonical integration owner remains separate.
+
+## Outcome
+
+- Not completed.
+
+## Verification
+
+- Not run.
+
+## Follow-ups
+
+- None recorded.
+
+## Promotion Candidates
+
+- None recorded.
+
+
+## Project Context Loaded
+
+- Task: 20260929-teacher-intro-merge-e8f30c62, feature mode, verified official owner/reservation in the recorded branch/worktree; base 1c07f7b. App worktree tool unavailable for parent non-Git context; official isolation succeeded.
+- Read entry/memory/planning gate, active/source records, changed integrated state, teacher ADR/decision index, architecture/data flow and domain rules. Verified unchanged positioning, success criteria, evidence/reflection/commitments against already reviewed a77ddbd context. Peer scope/constraints/promotions reviewed; composer-actions and Code-return are separate changes, excluded from this merge. Child-language has undefined scope but no concrete dependency. No other task's files modified.
+- Latest remote adds independent teacher reasoning/body streaming. Preserve its final-answer/card rendering, Main contract and tests. The source only changes presentation receipts/round counters, close/open behavior and related regression tests.
+- Canonical docs still describe individual introduction dismissal. The user's explicit approved all-or-none behavior supersedes that old rule; README/source describe the intended result. Canonical promotion deferred under existing exclusive integration lock; do not overwrite remote docs or source records.
+- Expected overlap: README and teacher Electron spec, including equivalent native preview clearance assertions. Resolve semantically, keeping both group lifecycle and streaming scenarios.
+- Gate: Passed.
+
+## Plan
+
+1. Merge source 7458c37 into remote-main candidate; inspect every conflict and retain source task record unchanged.
+2. Run typecheck, focused group/streaming units, lint, production build and affected headless/browser/Electron scenarios without focus activation.
+3. Record verification, fast-forward clean local main to the validated candidate, verify both parents are ancestors and offer optional cleanup only for this merge checkout.