feat(ui): consistent modern notification cards across Homebody

[Timverhoogt]

Summary

• Scan existing feedback across power, settings, Agent, Kids, announcements, presence, initiative, controllers, buttons, camera, vision, setup, MCP and installation.
• Reuse the bounded notification service with title/body hierarchy, semantic icons and neutral text; remove duplicate stale green action outcomes while preserving inline fallback.
• Keep persistent guidance/status inline in matching neutral callouts, and polling/fast movement quiet.
• Preserve privacy suppression, queue limits, reading pauses, fullscreen behavior and text-only rendering.
• Improve Sleep/Meeting confirmation wording and reject mismatched runtime power responses.
• Advance PWA shell and all asset versions together.

Verification

• Ruff passes.
• Isolated unit suite: 855 passed, 17 skipped (optional browser dependencies absent from unit venv).
• Separate actual Chromium suites: 17 passed, phone/landscape/desktop, expiry/fallback, false success, privacy, fullscreen, vision and agent connection regressions.
• Visually inspected the rendered phone notification.
• Tests intercept robot APIs; no physical motion or camera capture.

Deployment

Deploy the merged wheel to the Reachy Mini Jetson Homebody environment after CI is green, preserve configuration and verify live assets/runtime. See docs/notification-feedback.md for scan inventory.