v0.12.7: mandatory HDD backup, pre-dump, restore for all apps

Fix 1: HDD data backup is now mandatory for all deployed apps.
resolveAppBackupPaths() iterates ListDeployedStacks() directly — no
longer reads GetAppBackupMap() or checks the Enabled flag. DiscoverAppData()
drops backupPrefs parameter; BackupEnabled is set from HasHDDData.
Five dead settings methods removed: IsAppBackupEnabled, SetAppBackup,
GetAppBackupMap, SetAppBackupBulk, GetAppBackupPrefs.

Fix 2: Cross-drive backup now triggers a fresh DB dump (DumpStackDB)
before running. DBDumper interface added to crossdrive.go; Manager
implements it; SetDBDumper wired in main.go. Non-fatal — proceeds with
user data backup even if DB dump fails.

Fix 3: Restore dropdown shows ALL deployed apps (not just HDD+enabled).
restore.go rewritten: always restores config+DB, adds user data if hasHDD.
UI shows restore type banner (full / config+DB / config only) with
color-coded styling. Snapshot API clarified for non-HDD apps.

Fix 4: "Docker kötetek" → "Konfiguráció" — named volumes are not in
the restic backup paths; compose files + app.yaml are what's backed up.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

controller/internal/settings/settings.go

@@ -232,71 +232,6 @@ func (s *Settings) SetNotificationPrefs(prefs *NotificationPrefs) error {
 	return s.save()
 }
 
-// IsAppBackupEnabled returns whether backup is enabled for the given stack.
-func (s *Settings) IsAppBackupEnabled(stackName string) bool {
-	s.mu.RLock()
-	defer s.mu.RUnlock()
-	if s.AppBackup == nil {
-		return false
-	}
-	return s.AppBackup[stackName].Enabled
-}
-
-// SetAppBackup enables or disables backup for a stack and saves to disk.
-// Preserves existing CrossDrive config.
-func (s *Settings) SetAppBackup(stackName string, enabled bool) error {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	if s.AppBackup == nil {
-		s.AppBackup = make(map[string]AppBackupPrefs)
-	}
-	existing := s.AppBackup[stackName]
-	existing.Enabled = enabled
-	s.AppBackup[stackName] = existing
-	return s.save()
-}
-
-// GetAppBackupMap returns a map of stack_name -> enabled for all app backup prefs.
-func (s *Settings) GetAppBackupMap() map[string]bool {
-	s.mu.RLock()
-	defer s.mu.RUnlock()
-	if s.AppBackup == nil {
-		return nil
-	}
-	result := make(map[string]bool, len(s.AppBackup))
-	for k, v := range s.AppBackup {
-		result[k] = v.Enabled
-	}
-	return result
-}
-
-// SetAppBackupBulk updates backup prefs for all stacks at once and saves to disk.
-// Preserves existing CrossDrive configs and stacks not present in the input.
-func (s *Settings) SetAppBackupBulk(prefs map[string]bool) error {
-	s.mu.Lock()
-	defer s.mu.Unlock()
-	if s.AppBackup == nil {
-		s.AppBackup = make(map[string]AppBackupPrefs)
-	}
-	for name, enabled := range prefs {
-		existing := s.AppBackup[name] // preserves CrossDrive
-		existing.Enabled = enabled
-		s.AppBackup[name] = existing
-	}
-	return s.save()
-}
-
-// GetAppBackupPrefs returns the full AppBackupPrefs for a stack.
-func (s *Settings) GetAppBackupPrefs(stackName string) (AppBackupPrefs, bool) {
-	s.mu.RLock()
-	defer s.mu.RUnlock()
-	if s.AppBackup == nil {
-		return AppBackupPrefs{}, false
-	}
-	prefs, ok := s.AppBackup[stackName]
-	return prefs, ok
-}
-
 // GetCrossDriveConfig returns the cross-drive backup config for a stack (nil if not set).
 func (s *Settings) GetCrossDriveConfig(stackName string) *CrossDriveBackup {
 	s.mu.RLock()