## Summary / 摘要
- Make one coordinator the sole owner of Control Center presentation,
activation, exact-window registration, and key-window state across cold
launch, reopen, menu, overlay, and update paths.
- Remove the startup alpha/input gate; appearance hydration now applies
only `NSAppearance` while the window stays visible and interactive.
- Keep overlay panels passive by default and grant the session bubble
keyboard focus only through an explicit, revocable lease.
- Add bounded lifecycle diagnostics and a fail-closed cold-launch
release gate that rebuilds the exact worktree App and proves singleton
identity, layer, alpha, nonblank pixels, overlay ordering, and retained
focus.
- Replace every retention-sensitive fixed Rust event timestamp with one
current UTC fixture base plus relative offsets; the audit removed 25
calendar-dependent timestamps, including the failing 2026-07-17 cases,
imminent 2026-07-20 cases, and 2099 escape fixtures.
- Add a CI-enforced Rust source validator that follows same-file fixture
helpers, rejects fixed RFC 3339 timestamps crossing real event-retention
APIs, and permits isolated deterministic schema/serialization/migration
samples.
## Validation / 验证
- `cargo test --workspace --locked` — complete Rust workspace passed
(petcore unit 279; integration A/B/C/D 96/40/66/160; CLI and type suites
passed).
- `cargo clippy -p petcore --all-targets --locked -- -D warnings`
passed.
- `python3 script/validate_time_independent_tests.py --root .` passed;
running the same validator against the unfixed main tree reports all 25
risky timestamps.
- `python3 script/tests/test_validation_tooling.py` — 56 tests passed.
- `./script/validate_swift_tests.sh --scope all` — 749 tests passed.
- `./script/validate_app_lifecycle_contract.sh` — 16/16 passed.
- `APC_VALIDATE_HOST_UI=1 APC_MAIN_UI_COLD_LAUNCH_ITERATIONS=20
./script/validate_main_window_ui.sh` — 20/20 cold launches passed.
- Computer Use acceptance — five destinations, three bundled pets,
action preview, pet hide/show, Control Center close/reopen, and two
consecutive quit/relaunch cycles passed.
- `./script/validate_pre_push.sh` passed after the Rust and source-gate
update.
- `./script/validate_test_isolation.sh` and
`./script/validate_build_scripts_safety.sh --static-only` passed.
This PR updates the release-control-plane inventory, so it must complete
PR CI and then receive a trusted manual squash merge.
## Development claim / 开发声明
- Domain: `release-control-plane`
- Claim: `control-plane`
- Base commit: `e216a4fd13af88902cf2bd77d23939fe606c9383`
- Release preparation: `no`
- Focused validation:
- `python3 script/tests/test_validation_tooling.py`
- `./script/validate_build_scripts_safety.sh --static-only`
<!-- apc-engineering-coordination-v1
{"claim_overlap_rejections":1,"merge_tree_conflicts":0,"schema_version":"apc.engineering-coordination.v1","task_created_at":"2026-08-16T12:09:52Z","train_conflict_resolutions":0}
-->
---------
Co-authored-by: gd-ops <gd-ops@xmfunny.com>
