feat: add customizable tray menu with template-based display

[Serdnaley]

Summary

Adds a colored project and template of the tray menu in settings. Still not validated on all platforms and a bit risky to merge it yet I guess, but may be someone can help me checking it on other OS and leave some feedback so I can adjust it for the main version.

• Replaces the simple timer-only tray title with a canvas-rendered display that supports configurable templates
• Adds @napi-rs/canvas for native tray icon + text compositing, enabling colored project names directly in the menu bar / system tray
• Introduces a trayTemplate setting with placeholders: {hours}, {minutes}, {seconds}, {project}, {project_colored}, {description}, {task}
• Adds a live preview and template editor in the Settings page
• Supports dark/light mode with proper text colors

Changes

File	Description
src/main/tray.ts	Canvas-based tray rendering with template parsing, segment coloring, and icon compositing
src/main/settings.ts	New trayTemplate setting with persistence
src/renderer/src/pages/SettingsPage.vue	Template editor with live preview
src/renderer/src/components/MainTimeEntryTable.vue	Pass project/task info to tray via IPC
src/renderer/src/utils/settings.ts	Reactive trayTemplate binding
src/preload/main.ts, src/preload/interface.d.ts	New updateTrayTemplate IPC channel
src/renderer/src/utils/tray.ts	Extended type to include project/task data
package.json	Added @napi-rs/canvas dependency

Screenshots

The tray now renders like: 🕐 01:23:45 – Project Name with the project name in its assigned color.

(Will add actual screenshots if requested)

Test plan

• Verify tray displays timer with default template on macOS
• Verify tray displays timer on Windows/Linux with dark and light themes
• Change template in Settings and confirm tray updates live
• Remove project placeholder from template and confirm timer-only display works
• Stop timer and confirm tray returns to inactive icon
• Restart app and confirm template persists from settings

[CLAassistant]

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