refactor: migrate event listeners to runtime subscriptions for better modularity

[ldm0]

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[Copilot]

Pull request overview

This PR refactors event listener management by centralizing Tauri event subscriptions into a dedicated runtime module, improving code modularity and reducing duplication across hooks.

Changes:

• Introduces a centralized tauriEventRuntime.ts module that manages all Tauri event listeners with a pub-sub pattern
• Migrates four hooks (useRecentFSEvents, useDataLoader, useAppWindowListeners, useAppHotkeys) to use the new runtime subscription API
• Updates all corresponding tests to mock the runtime subscriptions instead of Tauri APIs directly

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
cardinal/src/runtime/tauriEventRuntime.ts	New runtime module implementing centralized event subscription management with singleton initialization pattern
cardinal/src/main.tsx	Initializes the event runtime at application startup
cardinal/src/hooks/useRecentFSEvents.ts	Migrated from direct Tauri event listener to runtime subscription, removed validation logic (now centralized)
cardinal/src/hooks/useDataLoader.ts	Simplified to use runtime subscription for icon updates, removed inline type casting
cardinal/src/hooks/useAppWindowListeners.ts	Refactored to use runtime subscriptions, split into separate useEffect hooks per subscription
cardinal/src/hooks/useAppHotkeys.ts	Migrated Quick Look keydown handling to runtime subscription
cardinal/src/hooks/__tests__/useRecentFSEvents.test.ts	New test file verifying runtime subscription integration
cardinal/src/hooks/__tests__/useDataLoader.test.ts	Updated to mock runtime instead of Tauri event API, added cleanup test
cardinal/src/hooks/__tests__/useAppWindowListeners.test.ts	Refactored to mock runtime subscriptions, verifies all subscription cleanups
cardinal/src/hooks/__tests__/useAppHotkeys.test.ts	Updated to mock runtime subscription instead of Tauri event API

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