fix(desktop): keep header aligned after zoom changes

[r6mez]

Closes: #5232

What Changed

• Keep the Linux title bar overlay height synchronized with renderer zoom changes.
• Update desktop View menu zoom actions to synchronize window appearance.
• Add extra sidebar header padding to preserve alignment.
• Add focused tests for zoom behavior and title bar sizing.

Why

Zooming the renderer could leave the desktop title bar overlay at its original height, causing the header and sidebar content to become misaligned. This updates the overlay whenever zoom changes and covers the behavior with platform-specific tests.

UI Changes

Before:

After:

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

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Note

Low Risk
Desktop window chrome and menu zoom behavior only; no auth, data, or backend changes. Risk is limited to Electron title bar overlay sizing on non-macOS platforms.

Overview
Fixes #5232 by keeping the native title bar overlay aligned with renderer zoom on Linux/Windows desktop, and nudging sidebar header padding so chrome stays visually consistent.

On non-macOS, resolveTitleBarOverlayHeight scales overlay height when zoom factor exceeds 1, and syncWindowTitleBarHeight runs after load, on zoom-changed, and when zoom keyboard shortcuts are detected. syncAppearance now applies overlay height from getZoomFactor() as well. The View menu on Linux/Windows uses custom zoom click handlers that adjust zoomLevel and call desktopWindow.syncAppearance (macOS keeps Electron role-based zoom items).

SidebarChrome changes header vertical padding from py-0 to py-2. Tests cover menu zoom + appearance sync and Linux title bar overlay updates.

^{Reviewed by Cursor Bugbot for commit 9eb8014. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Fix desktop title bar alignment after zoom changes on non-macOS platforms

• On non-macOS, the title bar overlay height now scales with the renderer zoom factor via a new resolveTitleBarOverlayHeight util, so the header stays aligned after zooming.
• DesktopWindow listens for zoom-changed and before-input-event (keyboard zoom shortcuts) to resync the title bar height after each zoom change.
• DesktopApplicationMenu adds explicit Zoom In/Out/Actual Size menu items with click handlers on non-macOS (macOS continues to use role-based items), each calling desktopWindow.syncAppearance after adjusting webContents.zoomLevel.
• Sidebar header vertical padding is increased from py-0 to py-2 in SidebarChromeHeader.

^{Macroscope summarized 9eb8014.}

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Approvability

Verdict: Needs human review

This bug fix adds new event listeners and zoom synchronization logic to desktop window management on Windows/Linux platforms. While the changes are well-tested and self-contained, the new runtime behavior (keyboard shortcut detection, zoom event handling) combined with the author being new to these files warrants human review.

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