v0.283.0: apps go off-site by themselves (decision 50) with a size warning; a Stop holds during a backup (R-721); page slips (R-724/R-725)

Red-proofs RP31-RP38. MinAgent 0.131.0 (unchanged).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0159rPz1ZhFKsS53msqPYxtS

controller/internal/stacks/desiredstate.go

@@ -156,3 +156,16 @@ func isObservedUp(s Stack) bool {
 		return false
 	}
 }
+
+// WantsStopped (R-721, v0.283.0) reports whether the household's own recorded intent for the stack is
+// „stopped". The machines that stop an app for their own purposes and start it again afterwards — the
+// whole-guest backup's quiesce, the nightly volume dump — ask this before their restart, so a Stop the
+// household pressed WHILE the app was down for them holds. Measured 2026-09-29 on a fresh box: Stop at
+// 19:37:16 recorded `desired state … stopped`, and the backup's resume started the app the same second.
+func (m *Manager) WantsStopped(name string) bool {
+	st, ok := m.GetStack(name)
+	if !ok {
+		return false
+	}
+	return DesiredStateOf(*st) == DesiredStateStopped
+}