Merge Home & Phone into a three-tab Home that knows your house

Home is now Overview | My Home | Phone. Overview leads with quick-action
tiles (focus, Do Not Disturb, health, snapshots, storage), keeps the
findings card — updates fold in, the reclaim-space prompt is gone on
purpose — and adds glance cards, the next calendar event, and weather.

My Home groups every light by Home Assistant area: the helper gained an
`areas` command (one REST template render, no websocket), and the rooms
degrade to a flat list on setups without areas. The favorites editor and
connection card moved intact. Phone gains a vitals strip — battery and
cell signal read from KDE Connect's plugin D-Bus objects, where absence
is data, not an error — beside ring, clipboard, send-a-file, and the
BlueBubbles handoff.

The retired home-phone id resolves to my-home forever via a new alias
map in SettingsRoutes (with a hasOwnProperty guard so prototype names
cannot leak into settingsPage). Storage no longer claims 0 B free — the
old page read a field the disks helper never emitted.

Contracts updated alongside; per the new workflow, the full suite runs
once at the end of the redesign (see the test backlog note).

Claude-Session: https://claude.ai/code/session_01Ms2FbjQy31TVf3CEvQhGM8

docs/superpowers/specs/2026-08-23-settings-redesign-test-backlog.md

@@ -0,0 +1,29 @@
+# Settings redesign — deferred test runs
+
+No contract is executed while the settings redesign is in flight: many are live
+harnesses that open windows, drive overlays, and run display transactions on
+the real desktop. Everything below runs **once, at the end of the redesign,
+with Gabriel's go-ahead**, and failures get fixed then.
+
+## The run
+
+- `panama test` — the full suite (162 contracts at last count; the top-level
+  README's count line must match the final number).
+
+## Known items to verify or investigate at the end
+
+- `quickshell/welcome-contract` — failed once ("the welcome screen did not
+  open") during a full-suite run storming the live session; passed in
+  isolation minutes earlier after the Welcome.qml comment edit. Suspected
+  contention flake, not a regression. Confirm.
+- `setup/readme-contract` — counts contracts; keep the README number in sync
+  as later phases add contracts (phase 2 added `phone-page-contract`).
+- Phase 2 additions already written and passing when last run:
+  `my-home-settings-contract` (renamed from `home-phone-settings-contract`),
+  `phone-page-contract`, extended `home_assistant_bridge_test.py` and
+  `kdeconnect_bridge_test.py`.
+- Each later phase (Appearance, …) appends its new/changed contracts here
+  instead of running them.
+
+## Phase 3 (Appearance) — append below
+