v0.20.0 — Startup Performance & Draft Preservation

What's New

⚡ Startup Performance

• Flash-free window launch — window starts hidden (show: false) and appears only after ready-to-show, eliminating the white flash on startup
• Non-blocking analytics init — PostHog initialization in the main process is now fire-and-forget instead of await-blocking app.whenReady()
• Deferred analytics sync — renderer-side syncAnalyticsSettings() moved from module-level to a useEffect so IPC calls don't block first paint
• Lazy model cache revalidation — model list revalidation (which spawns a Claude SDK subprocess) is deferred by 3 seconds, reducing startup IPC contention while cached models serve the initial render
• Relaxed session prefetch timing — idle callback timeout raised from 1.5s → 5s and fallback timeout from 250ms → 3s, with 50ms yields between sequential loads to let the main process event loop breathe

🎨 Draft Preservation

• BottomComposer component — new wrapper keeps the InputBar always mounted (hidden via aria-hidden + inert) while a permission prompt is active, preserving any unsent text the user was composing
• Test coverage — static-render tests verify both states: InputBar visible when no permission is pending, and InputBar hidden-but-mounted alongside the PermissionPrompt

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Full Changelog: v0.19.1...v0.20.0