BaabaPermissions class

Checks and requests runtime permissions, and walks the user through everything that can go wrong along the way.

final result = await BaabaPermissions.instance.request(
  AppPermission.camera,
  context: context,
);
if (result.isAllowed) openCamera();

One request runs the whole flow:

1. Check. Already allowed, or nothing to ask for on this OS → done, no UI.
2. Restricted (parental controls, MDM) → explain; nothing else helps.
3. Rationale → per RationaleMode, explain why before the system prompt. "Not now" ends the flow without asking.
4. Request — every stage of the plan, in order.
5. Denied → offer to ask again, up to maxRetries times, then offer Settings.
6. Permanently denied → numbered steps and an Open Settings button; waits for the user to come back and re-checks.
7. Service off (location services, Bluetooth) → offer the switch.

Nothing here throws. Platform failures, a broken store, a dialog that cannot be shown: all are contained, reported to the observer, and reflected in the returned PermissionResult.

Requests are serialised — Android rejects a second request while one is in flight — so two screens asking at once simply queue.