Expose the shell's remaining UI-only toggles over IPC

Every toggle you could only reach by mouse or panel hotkey is now
scriptable through omarchy-shell:

- omarchy.bluetooth toggleBluetooth — the radio (was right-click / B)
- omarchy.network toggleNetwork — Wi-Fi on/off (was W in the panel)
- omarchy.tailscale toggleTailscale — the connection as one call,
  matching the widget's right-click, instead of separate up/down
- omarchy.clock toggleWeekStart — calendar week start (was W)
- shell toggleBarTransparency — the bar background (was manage UI only)

Bluetooth and network follow the power/monitor pattern: manageIpc: false
so the panel owns the target's single IpcHandler and can extend it past
the inherited lifecycle methods.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

test/shell.d/clock-test.sh

@@ -147,6 +147,7 @@ assert(/ipcTarget: "omarchy\.clock"/.test(panelSource), 'calendar panel register
 assert(/manageIpc: false/.test(panelSource), 'calendar panel leaves the IPC target to the bar widget')
 assert(/anchorItem: root\.anchorItem/.test(panelSource), 'calendar panel anchors to the host widget button')
 assert(/function toggleWeekStart\(\)/.test(panelSource), 'calendar panel exposes a week start toggle')
+assert(/function toggleWeekStart\(\): void \{ root\.toggleWeekStart\(\) \}/.test(widgetSource), 'clock exposes the week start toggle over IPC')
 assert(/setting\("weekStartDay", null\)/.test(panelSource) && /persistSettings\(\{ weekStartDay:/.test(panelSource), 'calendar reads and writes the week start as weekStartDay')
 assert(/updateEntryInline/.test(panelSource), 'calendar panel persists the week start to shell.json')
 assert(/function moveMonth\(delta\)/.test(panelSource), 'calendar panel steps between months')