[R055LE]

Hearth now gives the floorplan more room and puts the panel/breaker answer within reach on phones. The shared light/dark theme uses warm surfaces, forest-green actions, consistent fields and focus states, a compact desktop header, and fixed phone navigation.

Search stays visible, map authoring lives under Edit map, and Fit/zoom sit at the map edge. The existing inspector becomes a compact phone panel with an explicit Expand details action. Collapsing it preserves selection and drafts; Back to map restores marker focus. Section and floor changes now protect rectangular-room and point drafts with Save, Discard, and Stay.

Validation:

• Frontend lint and production build passed; 17 unit tests and 89 Chromium browser tests passed.
• Backend lint and all 86 tests passed on Python 3.14. Owned runtime verification passed.
• Built the normal container and exercised the real API with a disposable synthetic home: point Save/Cancel, guarded navigation, cross-floor lookup, precise measured-room edits, and discarded room creation.
• Checked desktop and 390px layouts in light/dark themes, focus restoration, scrollable panel actions, and horizontal overflow. Automated accessibility audits had no confirmed violations; SVG label and theme contrast were checked manually.
• Release-equivalent Trivy scan found 0 HIGH/CRITICAL vulnerabilities. Independent code and visual review found no blocking defects.

Screenshots use synthetic data:

Desktop light	Desktop dark

Phone light	Phone dark