v0.1.12

Release v0.1.12\n\n- Applies the OG design philosophy docs/checklist and low-tech budget checks.\n- Adds shared color audit/performance budget scripts and tokenizes app status/danger/overlay colors.\n- Tightens Notes mobile title/action spacing and makes Notes title/header color adjustable via Appearance.\n- Hardens Notes sync so queued local edits upload before remote bootstrap/pull.\n\nValidation: npm checks, CRDT tests, backend tests, web builds, perf budget, color audit, Docker smoke test, signed Android APK verification.