devices widget: open file manager on dispvm block attach

- Use wait=False so run_service is non-blocking
- Log exception with logger.warning + exc_info=True instead of silent pass
- Apply same fix to DetachAndAttachDisposableWidget
- Fix import ordering, add logging setup
- Run black to satisfy CI

Fixes QubesOS/qubes-issues#10709

Author: Sahilll10

qui/devices/actionable_widgets.py

@@ -26,6 +26,7 @@
 import asyncio
 import functools
 import pathlib
+import logging
 from typing import Iterable, Callable, Optional, List
 
 import qubesadmin
@@ -40,6 +41,8 @@
 from . import backend
 import time
 
+logger = logging.getLogger(__name__)
+
 
 def load_icon(icon_name: str, backup_name: str, size: int = 24):
     """Load icon from provided name/path, if available. If not, load backup
@@ -324,6 +327,18 @@ async def widget_action(self, *_args):
 
         self.device.attach_to_vm(backend.VM(new_dispvm))
 
+        if self.device.device_class == "block":
+            try:
+                new_dispvm.run_service(
+                    "qubes.StartApp+qubes-open-file-manager",
+                    wait=False,
+                )
+            except Exception:  # pylint: disable=broad-except
+                logger.exception(
+                    "Failed to open file manager in %s",
+                    new_dispvm.name,
+                )
+
 
 class DetachAndAttachDisposableWidget(ActionableWidget, VMWithIcon):
     """Detach from all current attachments and attach to new disposable"""
@@ -340,6 +355,18 @@ async def widget_action(self, *_args):
 
         self.device.attach_to_vm(backend.VM(new_dispvm))
 
+        if self.device.device_class == "block":
+            try:
+                new_dispvm.run_service(
+                    "qubes.StartApp+qubes-open-file-manager",
+                    wait=False,
+                )
+            except Exception:  # pylint: disable=broad-except
+                logger.exception(
+                    "Failed to open file manager in %s",
+                    new_dispvm.name,
+                )
+
 
 class ToggleFeatureItem(ActionableWidget, SimpleActionWidget):
     def __init__(