fix(desktop): improve auto-updater diagnostics and bump deps

[Kitenite]

Summary

• Bump Electron 40.0.0 → 40.2.1 — picks up Squirrel.Mac fixes for stale staged update cleanup (electron#49365) and zip extraction crash handling (electron#47271)
• Bump electron-updater 6.7.3 → 6.8.2
• Disable differential downloads — the generic provider with GitHub releases can't resolve old blockmap files (they live in a different release, not at /releases/latest/)
• Add detailed diagnostic logging to auto-updater: current version, feed URL, version transitions, download progress in MB, and resolved file URLs

Context

Some users sporadically get stuck on old versions and auto-update never kicks in. The enhanced logging will help diagnose whether the issue is in the check/download phase or the Squirrel/ShipIt install phase. The Electron bump includes upstream fixes for macOS update reliability.

Test plan

• Verify app launches and auto-updater initializes with the new log line showing version, channel, and feed URL
• Trigger a manual update check (menu → Check for Updates) and confirm detailed logs appear
• Confirm typecheck passes

Summary by CodeRabbit

• Chores

  • Updated Electron framework to version 40.2.1

• Bug Fixes

  • Enhanced the software update process with improved error handling and real-time progress tracking during downloads.

[coderabbitai]

📝 Walkthrough

Walkthrough

This PR upgrades the Electron version from 40.0.0 to 40.2.1 and enhances the auto-updater module with disabled differential downloads and enriched logging throughout the update lifecycle to provide better visibility into version and download details.

Changes

Cohort / File(s)	Summary
Electron Dependency Update apps/desktop/package.json	Bumped Electron devDependency from 40.0.0 to 40.2.1.
Auto-Updater Enhancements apps/desktop/src/main/lib/auto-updater.ts	Set disableDifferentialDownload = true and augmented logging across all update events (initialization, checking, available, progress, downloaded, error) to include version information, file URLs, and download progress in MB.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• chore(desktop): upgrade electron to v40 #1194: Upgrades Electron dependency in the same package.json file from 40.0.0 to a newer v40.x version.
• feat(desktop): improve auto-updater with user notifications #243: Modifies the same auto-updater module to add interactive update dialogs and menu integration.
• feat(desktop): add required update mechanism #552: Integrates and uses the auto-updater module with additional wiring and update handling logic.

Poem

🐰 Electrons bounce to version new,
Differential downloads bid adieu,
With logs so rich, we'll see it all—
Updates dance through the desktop hall! ✨

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main changes: fixing auto-updater diagnostics and bumping dependencies.
Description check	✅ Passed	The description covers the key aspects with a clear summary, context, and test plan, though it does not follow the template structure provided.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch kitenite/debug-version-autodupdate

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No actionable comments were generated in the recent review. 🎉

🧹 Recent nitpick comments

apps/desktop/src/main/lib/auto-updater.ts (2)

243-248: info.files may be undefined, resulting in "files: undefined" in the log.

When info.files is nullish the optional chain returns undefined, which the template literal stringifies as the literal text "undefined". Consider a fallback for cleaner logs.

✏️ Suggested tweak

-		`[auto-updater] Update available: ${app.getVersion()} → ${info.version} (files: ${info.files?.map((f: { url: string }) => f.url).join(", ")})`,
+		`[auto-updater] Update available: ${app.getVersion()} → ${info.version} (files: ${info.files?.map((f: { url: string }) => f.url).join(", ") ?? "n/a"})`,

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257-261: Download progress logging looks good.

One thing to be aware of: this event can fire frequently (potentially many times per second). If log volume becomes a concern in production, consider throttling or logging at coarser intervals (e.g., every 10%). Not urgent given the diagnostic purpose of this PR.

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[github-actions]

🧹 Preview Cleanup Complete

The following preview resources have been cleaned up:

• ✅ Neon database branch
• ✅ Electric Fly.io app

Thank you for your contribution! 🎉