improvement(desktop): surface update actions in a persistent toast

[waleedlatif1]

Summary

• Add a persistent, dismissible desktop update toast alongside the Help-menu indicator, with Download update and Restart to update actions.
• Keep prompts across navigation, distinguish explicit dismissal from toast eviction, and withdraw actions when the updater state changes.
• Leave the mandatory-update gate in charge of unsupported shells.

Type of Change

• Improvement

Testing

• Electron update-notification and updater E2E suites, including JSON reports and light/dark screenshots. Negative controls failed at the intended lifecycle checks, including a red-to-green stack-eviction regression.
• Existing desktop update hook regression, desktop/app/EMCN type-checks, lint, block-registry check, full check:audits, and docs-manifest check.
• Fix and rerun the existing password-autofill E2E race: wait for the selected picker to close before reopening it.
• Cleanup and test-audit review completed.

Checklist

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

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Project	Deployment	Actions	Updated
docs	Ready	Preview	Sep 29, 2026 6:57pm UTC

[cubic-dev-ai]

All reported issues were addressed across 5 files

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[greptile-apps]

Confidence Score: 5/5

[Medium risk] Adds persistent toast notifications for desktop app updates.

The PR appears safe to merge based on the reviewed changes.

Summary

The PR adds a persistent desktop-update toast, distinguishes explicit dismissal from stack eviction, and extends Electron regression coverage.

• Update actions remain available across navigation and are withdrawn when updater state changes.
• The workflow now runs desktop E2E tests for root-layout changes.

Diagram

%%{init: {'theme': 'neutral'}}%%
flowchart LR
  A[Desktop updater state] --> B{Available or ready?}
  B -- No --> C[Withdraw toast]
  B -- Yes --> D{Offer explicitly dismissed?}
  D -- Yes --> E[Keep offer hidden]
  D -- No --> F[Show persistent action toast]
  F --> G[Download or restart]

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_{Reviews (3) · Last reviewed commit: "fix(desktop): distinguish update toast d..."}

[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

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[waleedlatif1]

@greptile

[waleedlatif1]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

@waleedlatif1 I have started the AI code review. It will take a few minutes to complete.

[cubic-dev-ai]

No issues found across 7 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}