refactor(backup): migrate backup_printer_config_dir to BackupService and update references accordingly

kiauh/core/services/backup_service.py

@@ -147,3 +147,43 @@ class BackupService:
                 target_path=target_path,
                 target_name=instance.cfg_file.name,
             )
+
+    def backup_printer_config_dir(self) -> None:
+        instances: List[Klipper] = get_instances(Klipper)
+        if not instances:
+            # fallback: search for printer data directories in the user's home directory
+            Logger.print_info("No Klipper instances found via systemd services.")
+            Logger.print_info(
+                "Attempting to find printer data directories in home directory..."
+            )
+
+            home_dir = Path.home()
+            printer_data_dirs = []
+
+            for pattern in ["printer_data", "printer_*_data"]:
+                for data_dir in home_dir.glob(pattern):
+                    if data_dir.is_dir():
+                        printer_data_dirs.append(data_dir)
+
+            if not printer_data_dirs:
+                Logger.print_info("Unable to find directory to backup!")
+                Logger.print_info(
+                    "No printer data directories found in home directory."
+                )
+                return
+
+            for data_dir in printer_data_dirs:
+                self.backup_directory(
+                    source_path=data_dir.joinpath("config"),
+                    target_path=data_dir.name,
+                    backup_name="config",
+                )
+
+            return
+
+        for instance in instances:
+            self.backup_directory(
+                source_path=instance.base.cfg_dir,
+                target_path=f"{instance.data_dir.name}",
+                backup_name="config",
+            )