[task] Build desktop issue list panel

[phongndo]

Goal

Add a desktop issue list panel backed by app-server issue data.

Why this matters

The desktop app should become a visual local dashboard for GitHub workflow. Issues are the simplest contributor queue to show first.

Command/API target

Call github.issue.list through the typed preload/app-server path.

Depends on

• [task] Add app-server issue list and view methods #8 for issue list data.
• [task] Render GitHub workflow dashboard in desktop #14 for desktop dashboard structure.

Out of scope

• Do not call GitHub directly from renderer code.
• Do not implement issue mutations.
• Do not build PR detail panels here.

Definition of done

• Desktop shows issue number, title, labels or status, and URL/action affordance where appropriate.
• Loading, empty, no-auth, and error states are visible.
• The panel works without nested cards or marketing-style layout.

Verification

• pnpm desktop:typecheck
• pnpm desktop:build
• Run pnpm desktop:dev and include screenshots or concise manual observations.

[github-actions]

This issue needs a small update before triage:

• Area must be one of Automation, CLI, Core, Desktop, Design, Docs, Protocol, Tests, or TUI so triage automation can route the issue.

Please edit the issue instead of opening a new one.

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Potentially related existing work:

• [task] Build desktop PR list and detail panel #21 [task] Build desktop PR list and detail panel (open)
• [task] Build desktop checks and review panel #22 [task] Build desktop checks and review panel (open)
• [task] Render GitHub workflow dashboard in desktop #14 [task] Render GitHub workflow dashboard in desktop (open)

If one of these is the canonical thread, comment there and a maintainer can close this issue with /duplicate #123; otherwise a maintainer can clear the review with /not-duplicate.