feat(bulk-base-model): implement bulk base model setting functionality with UI and context menu integration

locales/en.json

@@ -320,6 +320,7 @@
             "selectedSuffix": "selected",
             "viewSelected": "View Selected",
             "addTags": "Add Tags to All",
+            "setBaseModel": "Set Base Model for All",
             "copyAll": "Copy All Syntax",
             "refreshAll": "Refresh All Metadata",
             "moveAll": "Move All to Folder",
@@ -582,6 +583,14 @@
             "replaceTags": "Replace Tags",
             "saveChanges": "Save changes"
         },
+        "bulkBaseModel": {
+            "title": "Set Base Model for Multiple Models",
+            "description": "Set base model for",
+            "models": "models",
+            "selectBaseModel": "Select Base Model",
+            "save": "Update Base Model",
+            "cancel": "Cancel"
+        },
         "exampleAccess": {
             "title": "Local Example Images",
             "message": "No local example images found for this model. View options:",
@@ -989,6 +998,11 @@
             "nameUpdateFailed": "Failed to update model name",
             "baseModelUpdated": "Base model updated successfully",
             "baseModelUpdateFailed": "Failed to update base model",
+            "baseModelNotSelected": "Please select a base model",
+            "bulkBaseModelUpdating": "Updating base model for {count} model(s)...",
+            "bulkBaseModelUpdateSuccess": "Successfully updated base model for {count} model(s)",
+            "bulkBaseModelUpdatePartial": "Updated {success} model(s), failed {failed} model(s)",
+            "bulkBaseModelUpdateFailed": "Failed to update base model for selected models",
             "invalidCharactersRemoved": "Invalid characters removed from filename",
             "filenameCannotBeEmpty": "File name cannot be empty",
             "renameFailed": "Failed to rename file: {message}",