Fold thirty-one settings pages into fifteen categories with tabs

The sidebar was a flat scan of thirty-one rows; now it reads like a
settings app. Multi-subject categories (Input, Network & Sharing,
Applications, Users & Accounts, Privacy & Security, System) carry an
Appearance-style tab strip above the page, drawn by the shell so the
leaf pages themselves are untouched. The taxonomy lives in one new
file, services/SettingsRoutes.qml; the sidebar, the strip, route
validation, search breadcrumbs, and both generators derive from it.

ShellState.settingsPage still holds leaf ids, so every deep link, IPC
call, and search result keeps working — and now lands on the exact
tab. Dictation moves out of Sound onto its own page under Input, with
a handoff back to Sound for the microphone. The strip scrolls when
System's nine tabs outgrow a tiled window. All 161 contracts pass.

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

config/local/share/vicinae/scripts/settings-connectivity

@@ -1,10 +1,10 @@
 #!/usr/bin/env bash
 # Generated by scripts/panama-settings-commands -- do not edit by hand.
 # @vicinae.schemaVersion 1
-# @vicinae.title Settings: Network & Devices
+# @vicinae.title Settings: Connections
 # @vicinae.mode silent
 # @vicinae.icon ../../icons/hicolor/scalable/apps/panama-settings.svg
-# @vicinae.description Open Network & Devices in Settings.
+# @vicinae.description Open Connections in Settings.
 # @vicinae.keywords ["settings", "wi-fi", "bluetooth", "printers"]
 
 exec "$HOME/.config/quickshell/scripts/panama-action" settings-page connectivity