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

config/dot/quickshell/manual/05-making-it-yours.md

@@ -2,13 +2,18 @@
 
 ## Settings
 
-`Super + I`. Fifteen categories down the side, covering appearance, displays,
+`Super + I`. Fourteen categories down the side, covering appearance, displays,
 sound, input, network, power, accounts and the rest. A category with more than
 one subject in it opens a row of tabs above the page, which is where the
 narrower topics live: Printers is a tab of Network & Sharing, Dictation a tab
 of Input, and About, Software Update, Storage, Snapshots and this manual are
 tabs of System.
 
+Home is the first of them, and the page `Super + I` lands on. Its Overview tab
+is the one you already know; My Home lists your Home Assistant lights by room
+alongside the accessories Control Center shows, and Phone holds the iPhone
+handoffs — battery, ring it, send it the clipboard or a file, and Messages.
+
 The search box at the top searches the settings themselves rather than page
 names, and each result says where it will land, so if you know what you want
 to change you can type it and never touch the sidebar.