- Add draggable agent overlay pill (status dot + step text + stop button)
that shows over other apps while connected. Fix ComposeView rendering
in service context by providing a SavedStateRegistryOwner.
- Add stop_goal protocol message so the overlay/client can abort a
running agent session; server aborts via AbortController.
- Persist screen-capture consent to SharedPreferences so it survives
process death; restore on ConnectionService connect and Settings resume.
- Query AccessibilityManager for real service state instead of relying
on in-process MutableStateFlow that resets on restart.
- Add overlay permission checklist item and SYSTEM_ALERT_WINDOW manifest
entry.
- Filter DroidClaw's own overlay nodes from the accessibility tree so the
agent never interacts with them.
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