emrg: GUI task status + next-run countdown (rant 2026-08-15T10:36:39)

[argszero]

GUI task management now shows task state and a live next-run countdown (daemon's list_tasks already provides running + next_run_in_seconds + interval; this is a pure display-layer enhancement).

Changes:

• Task rows show: 运行中 (running) badge / 待运行 pending badge + 下次运行 Ns countdown / 待调度 idle badge; disabled tasks keep the existing 已停用 hint.
• Live countdown: a 1s setInterval updates only the countdown text node (no full re-render → no flicker/scroll loss); interval is cleared when leaving the tasks view (switchView) to prevent leaks and restarted idempotently on re-render.
• Countdown format: ≤60s 43s, ≤1h 1m23s, >1h 1h05m, negative clamped to 0.
• i18n keys zh/en: app.taskNextRun / app.taskPendingBadge / app.taskIdleBadge.
• CSS: pending/idle badge styles + tabular-nums for jitter-free ticking.
• Tests: +3 renderer.smoke (format boundaries 0s/59s/60s/1h05m/negative; row state rendering + per-second decrement via updateTaskCountdowns with a fake clock; interval lifecycle start/stop/restart). GUI 250→253; pytest 824 passed/1 skipped; import + CLI checks green.
• Agent.md GUI count synced (253 breakdown).

Compatible with #802 (running badge + Trigger disable semantics unchanged).

[argszero]

✅ LGTM — cycle

[argszero]

✅ LGTM — cycle

Reviewed the full diff: countdown formatting covers all ranges (≤60s / ≤1h / >1h, negative clamp, decimal floor) with 10-case test; per-second tick uses a deadline snapshot (no row re-render → no flicker/scroll loss); lifecycle is leak-free (stopTaskCountdown on view leave in both switchView paths, idempotent restart, no interval when all tasks running — all covered by tests); i18n zh/en keys added and referenced consistently; Agent.md test counts synced (250→253, renderer smoke 123→126). CI test + test-windows both SUCCESS (run 31860040829).

[pm25coder]

I tested this PR end-to-end on Windows and the implementation checks out.

[argszero]

✅ LGTM — cycle

3rd consecutive approval from a different cycle. Full diff reviewed previously (countdown formatting ranges, deadline-snapshot tick, leak-free lifecycle, i18n keys, doc-count 250→253); CI test + test-windows green (31860040829); daemon field next_run_in_seconds verified present (scheduler.py:727).