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

tests/quickshell/settings-pages-contract

@@ -9,7 +9,7 @@ fail() {
     exit 1
 }
 
-pages=(Home Displays Connectivity Sound Dictation Notifications ScreenIntelligence Health About)
+pages=(Home MyHome Phone Displays Connectivity Sound Dictation Notifications ScreenIntelligence Health About)
 for page in "${pages[@]}"; do
     page_file="$repo_dir/config/dot/quickshell/modules/settings/${page}Page.qml"
     [[ -f "$page_file" ]] || fail "${page}Page.qml is missing"
@@ -307,7 +307,7 @@ shell_pid="$harness_pid"
 # four different categories, and the page the tab strip was introduced for.
 # Routing to a tab must land on that tab, not on whatever its category opens
 # first, which is the failure the SettingsRoutes resolution could introduce.
-pages=(home appearance displays connectivity home-phone desktop sound dictation notifications screen-intelligence shortcuts services manual about)
+pages=(home appearance displays connectivity my-home phone desktop sound dictation notifications screen-intelligence shortcuts services manual about)
 for page in "${pages[@]}"; do
     qs_for_test ipc call settings page "$page" >/dev/null
     for _ in $(seq 1 20); do