fix(app): suggest server projects on home - #43030

AI code review — automated review for reference; please use your judgment.

• packages/app/src/pages/home/home-projects.tsx:12 — showRecentForServer performs a side effect (recentMode.set(key, true)) inside an accessor called during render; once latched, recent mode stays on for that server even after projects are added. If that's intentional ("shown until dismissed"), fine — otherwise derive it purely from state.
• packages/app/src/pages/home/home-projects.tsx:8 — dismissedRecent is in-memory only, so dismissal resets on reload while the recently-closed list itself persists; consider persisting the flag alongside recents.
• packages/app/src/app.tsx:210 — the onSelect chain swallows all failures with .catch(() => undefined); if file.list/project.current fails the user gets navigated home with no feedback. Consider surfacing an error toast.
• Good test coverage for the new pure helper (knownProjectWorktrees) and menu placement.

No blocking issues found.

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