[codex] Pause ticker while panel is hidden

[zergzorg]

Summary

• pause useNowTicker intervals while document.hidden is true by default
• refresh now immediately when the document becomes visible again, before the next interval tick
• add hook coverage for initially hidden documents, active ticker pause/resume, and opt-out behavior

Why

useNowTicker drives display-only UI such as countdowns and relative timestamps. When the menu panel WebView is hidden, those React timer updates do not change visible UI but can still wake the app. Pausing the ticker while hidden reduces idle UI work without changing provider probes or background refresh scheduling.

This addresses #488 and complements the broader resource-budget discussion in #487.

Notes

The default behavior is visibility-aware, but callers can keep the old hidden ticking behavior with pauseWhenHidden: false if a future use case needs it.

Validation

• node ./node_modules/vitest/vitest.mjs run src/hooks/use-now-ticker.test.ts
• PATH="/Users/ai/.cache/codex-runtimes/codex-primary-runtime/dependencies/node/bin:$PATH" bun run build
• node ./node_modules/vitest/vitest.mjs run

The full Vitest run passes. Existing tests print Tauri store mock stderr in App.test.tsx, but the suite exits successfully.

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Summary by cubic

Pause useNowTicker ticks while the document is hidden to reduce idle updates, and resume with an immediate refresh when it becomes visible. Adds a pauseWhenHidden option (default true) plus tests for initial hidden state, pause/resume, and opt‑out behavior.

^{Written for commit 2c0614e. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

No issues found across 2 files

_{Re-trigger cubic}