Fix delete shortcut handling in session manager

tests/test_selector.py

@@ -91,7 +91,7 @@ class SelectorCatalogTests(unittest.TestCase):
         self.assertIn("remote:orangepi:default", by_key)
         self.assertIn("remote:orangepi:old", by_key)
         self.assertTrue(by_key["remote:orangepi:old"].deletable)
-        self.assertIn("d 删除", by_key["remote:orangepi:old"].detail)
+        self.assertIn("d/D 删除", by_key["remote:orangepi:old"].detail)
         self.assertFalse(by_key["remote:orangepi:default"].deletable)
         self.assertIn("new:orangepi", by_key)
         self.assertEqual(by_key["local:draft"].main, "○ draft")
@@ -340,11 +340,13 @@ class SelectorActionTests(unittest.TestCase):
             selector._handle_key("d", rows)  # type: ignore[attr-defined]
             self.assertEqual(selector.view, "main")
             self.assertEqual(deleted, [])
+            self.assertEqual(selector.query, "")
+            self.assertIn("只能删除", selector.message)
 
             selector.query = ""
             old = next(row for row in rows if row.key == "remote:orangepi:old")
             selector.selected_key = old.key
-            selector._handle_key("d", rows)  # type: ignore[attr-defined]
+            selector._handle_key("D", rows)  # type: ignore[attr-defined]
             self.assertEqual(selector.view, "confirm-delete-session")
             confirm = next(
                 row