Migrate the shell palette to the v2 semantic spine and clean up
spec violations:
- Theme.qml: v2 neutrals (#070709 ground), split real blue (#5b8cff)
from info cyan, retire the peach token, add a focus attention violet.
- Weather: severity-driven coloring (cyan/amber/red) from weatherCode;
replaces decorative peach. Forecast highs=text, lows=subtext0.
- SystemPopout: performance profile + Reboot hold -> amber (peach retired).
- Workspaces: active indicator red -> focus violet (selection is
attention, not danger).
- SystemPill: Arch logo lavender -> real blue.
- Bar.qml: gate BluetoothPill instantiation behind hasBluetooth so
BlueZ DBus never spins up when the bluetooth tag is off.
- IdleScreen: route hardcoded hex through Theme tokens.
mpuchstein
490e03d35c