phase: 05_autohide_stage_controls

**Phase 05 final verification pass — all green.**

- Verified implementation in tree: staged `.cap`/`.actions` hidden at rest with container+children `pointer-events: none` (`app.css`); `revealStageControls()` with 3 s idle timer, `pointermove`/`pointerdown` + wall-keypress wiring, `unstage()` timer/attribute cleanup (`watch.js`); `tests/e2e/test_stage_autofade.py` (5 tests) present; `test_keyboard_wall.py` rest-state assertion updated per task 01.
- Gates: `uv run ruff check . && uv run ruff format --check .` — clean; `uv run pyright` — 0 errors; `uv run pytest` — **274 passed, 4 skipped** (realdisplay-gated), coverage **95%** (>90% ✓); `MIRROR_REALDISPLAY=1 uv run pytest -m realdisplay` — **3 passed, 1 skipped** (documented platform skip: no audio source on host).
- Dedicated phase suite `uv run pytest tests/e2e/test_stage_autofade.py` — **5/5 in isolation**.
- Criteria: idle opacity 0 + bottom-edge hit probe ✓; mouse reveal → 1 → idle fade → 0 ✓; keypress reveal + Exit visible/clickable/unstages ✓; grid rules byte-for-byte unchanged (CSS diff touches only the staged block; grid guard tests green) ✓; suite green, coverage >90% ✓; phases 01–04 suites all green (no regression) ✓.
- Documentation: README.md reviewed in full — all commands, env vars (incl. `DEBUGPY_*`, 25 Mbit/s default), `--allow-cidr`, kiosk/share key tables, index-page and auto-hide descriptions match the code; the only stale "12 Mbit/s" default lives in locked PLAN.md §6, README is correct — no change made. AGENTS.md: all facts (gates, test names, starlette 1.10, e2e flags, ~95% coverage) current — verified, no changes needed.
- Notable: no code changes were required this pass — the phase work was already complete and correct; nothing to fix.
- Next pending phase: none — phase 05 is the last in `todo/`.

README.md

@@ -169,6 +169,12 @@ in. On `/watch`:
 | `?` | Show / hide this list on screen. |
 | `Esc` | Close the key list, then leave the stage. |
 
+A staged mirror's caption bar and control cluster are **hidden at rest**, so
+the shared video — a terminal's bottom line included — is never covered by
+them. A pointer move over the stage (a tap, for touch) or any key press
+while staged reveals them briefly; after ~3 s without activity they fade
+back, so a parked pointer or a one-time key press never pins them up.
+
 A mirror's audio is only heard while it is on the stage: every mirror starts
 muted, unmuting one (the tile's audio button or `m`) mutes the others, and
 leaving the stage re-mutes it. Sound never starts without a click or a