feat: Docker volume backup, Tier 2 restore, restore dropdown fixes (v0.33.0)

- Add Docker named volume backup to Tier 1 (dump to tar, include in restic)
  and Tier 2 (copy tars to rsync mirror _volumes/ dir)
- Fix volume name resolution: use project-prefixed names (mealie_mealie_data)
- Fix double Tier 1 in restore dropdown: filter snapshots by app's home drive
- Add Tier 2 restore: RestoreAppFromTier2() restores from rsync mirror
- Show Tier 2 entry in restore dropdown when cross-drive backup succeeded
- Add .fab import link in restore section
- Volume-aware restore type banners and backup content labels

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

controller/internal/web/handlers.go

@@ -1094,7 +1094,13 @@ func (s *Server) backupRestoreHandler(w http.ResponseWriter, r *http.Request) {
 	s.logger.Printf("[WARN] [web] Restore requested: stack=%s, snapshot=%s from %s", stackName, snapshotID, r.RemoteAddr)
 
 	start := time.Now()
-	if err := s.backupMgr.RestoreApp(stackName, snapshotID); err != nil {
+	var err error
+	if snapshotID == "tier2-rsync" {
+		err = s.backupMgr.RestoreAppFromTier2(stackName)
+	} else {
+		err = s.backupMgr.RestoreApp(stackName, snapshotID)
+	}
+	if err != nil {
 		s.logger.Printf("[ERROR] [web] Restore failed: %v", err)
 		if s.isDebug() {
 			s.logger.Printf("[DEBUG] [web] backupRestoreHandler: stack=%s failed after %s", stackName, time.Since(start))