FIX: AutoUpdaterService code style improvements

[MiwiDots]

Summary

• Remove unused autoUpdater import from electron-updater
• Make updateCheckInProgress and updateDownloaded readonly since they're never modified
• Fix downloadAndInstallUpdate return type consistency by using Promise.reject

Test plan

• Code compiles without TypeScript errors
• AutoUpdater service still works with manual update checks
• No functional changes, only code style improvements

🤖 Generated with Claude Code

Summary by CodeRabbit

• Refactor
  • Improved internal handling of update status for greater reliability. No visible changes to user experience.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

The code in the AutoUpdaterService was updated to remove an unused import, make two boolean instance variables immutable with the readonly modifier, and change the downloadAndInstallUpdate method from async to a regular function that returns a rejected Promise instead of throwing an error.

Changes

File	Change Summary
src/main/services/AutoUpdaterService.ts	Removed unused import; made instance variables readonly; changed method from async to returning rejected Promise

Poem

In the warren, code is neat,
Readonly flags—no chance to cheat!
Async gone, a Promise thrown,
Unused imports overthrown.
The updater hops with pride anew,
Clean and tidy, through and through!
🐇✨

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npm error Exit handler never called!
npm error This is an error with npm itself. Please report this error at:
npm error https://github.com/npm/cli/issues
npm error A complete log of this run can be found in: /.npm/_logs/2025-06-30T13_19_57_653Z-debug-0.log

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📥 Commits

Reviewing files that changed from the base of the PR and between 8d6a758 and bb77c8b.

📒 Files selected for processing (1)

• src/main/services/AutoUpdaterService.ts (2 hunks)

✨ Finishing Touches

• 📝 Generate Docstrings

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