feat(auto): quota-aware AUTO slot scheduling (model tiers, hour/week/month resets) + key scope periods; fix key/slot create/delete UX

internal/config/store.go

@@ -137,4 +137,21 @@ func (s *Store) DeleteKey(key string) (bool, error) {
 	}
 	s.data.Keys = kept
 	return true, s.persistLocked()
+}
+
+// AutoRules returns the persisted AUTO scheduling slots.
+func (s *Store) AutoRules() []ModelScope {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	out := make([]ModelScope, len(s.data.Auto))
+	copy(out, s.data.Auto)
+	return out
+}
+
+// SaveAutoRules persists the AUTO scheduling slots.
+func (s *Store) SaveAutoRules(entries []ModelScope) error {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	s.data.Auto = entries
+	return s.persistLocked()
 }