feat: 新增学生分组拖拽快捷编辑

src/i18n/locales/en-US.json

@@ -490,6 +490,13 @@
     "groupSaveFailed": "Failed to save group",
     "existingGroups": "Existing groups (click to fill)",
     "noExistingGroups": "No existing groups yet",
+    "groupBoardEdit": "Edit Groups",
+    "groupBoardTitle": "Quick Group Editor",
+    "groupBoardHint": "Drag students across group columns and save to apply in batch.",
+    "groupBoardEmpty": "Drag students here",
+    "groupBoardNoChanges": "No group changes",
+    "groupBoardSaveSuccess": "Updated groups for {{count}} students",
+    "groupBoardSaveFailed": "Save failed, {{failed}} students were not updated",
     "noGroup": "Ungrouped",
     "editAvatarTitle": "Set Avatar - {{name}}",
     "avatarUpload": "Upload Image",