fix(desktop): increase backend readiness timeout from 10s to 30s

[rowalth]

What Changed

DEFAULT_TIMEOUT_MS in apps/desktop/src/backendReadiness.ts from 10_000 to 30_000.

Why

The 10-second timeout is too tight for many machines. The backend consistently needs 10–12s to start (Node.js init → SQLite → migrations → HTTP listen), so the desktop gives up before the backend is ready — sometimes by less than a second.

Log evidence (v0.0.17, macOS x64):

• Last successful start: 9.18s (0.82s under the limit)
• Every cold start after that: 10.5–12s → timeout
• Backend reaches Listening 0.35–2s after the desktop gives up

30s gives comfortable headroom without affecting fast machines — the readiness check still polls every 100ms and resolves immediately when the backend responds.

Fixes #1916

Checklist

• This PR is small and focused
• I explained what changed and why
• I included before/after screenshots for any UI changes
• I included a video for animation/interaction changes

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Note

Low Risk
Low risk: only adjusts a default timeout value for desktop backend readiness polling, with no logic or data-handling changes.

Overview
Increases the default backend readiness wait timeout in the desktop app from 10s to 30s, reducing startup failures on slower/cold machines while keeping the existing polling behavior unchanged.

^{Reviewed by Cursor Bugbot for commit e273835. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Increase backend readiness timeout from 10s to 30s in desktop app

Raises DEFAULT_TIMEOUT_MS in backendReadiness.ts from 10,000ms to 30,000ms, giving the backend more time to become ready before timing out.

^{Macroscope summarized e273835.}

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[macroscopeapp]

Approvability

Verdict: Approved

Single-line change increasing a timeout constant from 10s to 30s. This is a simple, low-risk configuration tweak with no logic changes or side effects beyond allowing more time for backend readiness checks.

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[juliusmarminge]

also working on startup time improvements!