feat(desktop): add Ctrl/Cmd + mouse wheel zoom support

[liuhao1024]

What does this PR do?

Adds Ctrl/Cmd + mouse wheel zoom support to Hermes Desktop. When the user holds Ctrl (Windows/Linux) or Cmd (macOS) and scrolls the mouse wheel, the app zooms in/out with the same 0.1 step used by keyboard shortcuts.

This is a standard desktop/browser UX pattern that users expect — most text-heavy applications support this gesture for quick zoom adjustments.

Related Issue

Fixes #40295

Type of Change

• ✨ New feature (non-breaking change that adds functionality)

Changes Made

• apps/desktop/electron/main.cjs: Extended installZoomShortcuts() with two complementary mechanisms:
  • Main process: input-event listener on webContents detects mouseWheel events with Ctrl/Cmd held and adjusts zoomLevel (same 0.1 step as keyboard shortcuts)
  • Renderer: DOM wheel listener injected via did-finish-load prevents native scroll when modifier is held, so only zoom happens (not both zoom + scroll)

How to Test

1. Open Hermes Desktop
2. Hold Ctrl (Windows/Linux) or Cmd (macOS) and scroll the mouse wheel up → should zoom in
3. Hold Ctrl/Cmd and scroll the mouse wheel down → should zoom out
4. Release the modifier and scroll → should scroll normally (no zoom)
5. Verify keyboard shortcuts (Ctrl/Cmd + +/-/0) still work as before
6. Test on all three platforms (macOS, Windows, Linux) if possible

Checklist

Code

• I've read the Contributing Guide
• My commit messages follow Conventional Commits (feat(desktop):)
• I searched for existing PRs to make sure this isn't a duplicate
• My PR contains only changes related to this fix/feature (no unrelated commits)
• I've considered cross-platform impact (Windows, macOS, Linux) — the modifier detection uses IS_MAC ? input.meta : input.control matching existing keyboard zoom behavior

Documentation & Housekeeping

• I've updated relevant documentation — or N/A (zoom gesture is self-discoverable, no docs needed)
• I've updated cli-config.yaml.example — or N/A (no config changes)
• I've considered cross-platform impact — modifier key detection is platform-aware

[liuhao1024]

Closing as self-duplicate of #40414, which has the same fix plus IPC channel and type declarations for a more complete implementation.

[liuhao1024]

Self-duplicate of #40414 which includes the same main.cjs fix plus preload.cjs IPC channel and global.d.ts type declarations for a more complete implementation.