improvement(desktop): add apple signing, fix some bugs

[Sg312]

Summary

Add apple signing, fix some bugs
Companion: https://github.com/simstudioai/mothership/pull/431

Type of Change

• New Feature

Testing

Manual

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

[greptile-apps]

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[vercel]

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Aug 11, 2026 9:47pm

[github-actions]

⚠️ Cross-repo companion check

One or more companion PRs aren't merged into staging yet. Merging this without them will leave copilot and sim out of sync — merge them in lockstep.

• ❌ simstudioai/mothership#431 — OPEN, not merged (targets staging) — improvement(desktop): desktop app improvements