The CLAUDE_INSTRUCTIONS env var was computed differently during container
creation (with port mapping docs + scheduler instructions appended) vs
the recreation check (bare merge only). This caused
container_needs_recreation() to always return true, triggering a full
recreate on every stop/start cycle.
Extract build_claude_instructions() helper used by both code paths so
the expected value always matches what was set at creation time.
Also add TODO.md noting planned tauri-plugin-updater integration for
seamless in-app updates on all platforms.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
