🐛 fix(context-menu): apply window appearance to pane hamburger menu

[kud]

🎟️ Ticket

No ticket.

📄 Description

The pane hamburger menu (shown via titleBarMenu) was not inheriting the window's dark/light appearance when using the minimal theme. This caused it to render incorrectly — e.g. appearing light-themed in a dark window.

The fix calls applyWindowAppearanceToMenu: on the menu returned by titleBarMenu, identical to what already happens for the tab right-click context menu (lines 94, 102, 110 in iTermTextViewContextMenuHelper.m). One line of change.

📽️ Screencast

No visual changes in terms of layout — the fix corrects a visual regression where the pane menu ignored the window appearance. A before/after screenshot would show the menu now rendering with the correct dark appearance in a minimal-theme dark window.

✅ How to Validate

1. Set iTerm2 theme to Minimal (Preferences → Appearance → Theme → Minimal).
2. Set the colour scheme to a dark profile so the window is in dark mode.
3. Open a pane and click the hamburger (≡) button in the title bar to open the pane menu.
4. Confirm the menu respects the dark appearance (dark background, light text), matching the tab right-click context menu.
5. Repeat with a light-mode window to confirm it also renders correctly in light mode.

🛠️ Developer Checklist

• Code is readable and maintainable
• Tests included and passing (if applicable)
• PR is atomic and focused on a single feature or bug
• Commits follow Conventional Commits