fix(desktop): synchronize session row metadata with menu state

[chihumyum]

Summary

• Prevent the sidebar session timestamp from overlapping or flickering with its action trigger during menu dismissal.
• Mirror the controlled menu-open state onto the session action wrapper.
• Use the same hover, focus, and menu-open conditions for both action visibility and timestamp hiding, so they switch together.
• Extend Electron regression coverage for hover loss, outside dismissal, reopening, and pointer menu selection.

before:

after:

Verification

• npm run build:with-deps from apps/desktop
• npm --workspace @maka/desktop run typecheck
• npx biome check apps/desktop/e2e/sidebar-project-row.spec.ts apps/desktop/src/renderer/styles/sidebar.css packages/ui/src/session-history-list.tsx
• npx playwright test --config e2e/playwright.config.ts e2e/sidebar-project-row.spec.ts — 3 passed
• git diff --check

The focused regression failed before the controlled menu-state wiring was added.

AI use

Select exactly one:

• No generative tool made a substantive contribution
• Generative tooling made a substantive contribution

Tool(s) and scope: Codex analyzed the popover/focus timing, implemented the controlled-state CSS fix, and extended Electron E2E coverage.

Checklist

• Tests cover the change and fail without it
• Lint, format, typecheck and the affected suites pass locally

Does this PR entail a change in behavior?

• Yes — described under Summary above
• No

[Astro-Han]

Thanks — this is a focused fix at the existing controlled-menu seam. I reviewed exact head dff8838ce4dc63f04dbf5d6249443c103a664827; the DOM projection follows the same menuOpen state that owns dismissal and focus handoff, the selector does not affect project rows, and the pointer/keyboard regression coverage matches the behavior. I found no P0–P3 issues, and the current-head test check is green.

AI-assisted review disclosure: OpenAI Codex performed an independent exact-head review. I verified the state ownership, event/lifecycle paths, tests, live review state, mergeability, and current-head CI, and I independently made the approval decision.