fix: edit_to_core 仅在相关字段变更时才带 content_set/launch_overrides patch，修复无 content set 的实例改分组失败

apps/app/src/api/instance/mod.rs

@@ -478,7 +478,18 @@ fn edit_to_core(edit_instance: EditInstance) -> Result<CoreEditInstance> {
                 None => Ok(CoreInstanceLink::Unmanaged),
             })
             .transpose()?,
-        launch_overrides: Some(InstanceLaunchOverridesPatch {
+        launch_overrides: {
+            let has_launch_change = edit_instance.java_path.is_some()
+                || edit_instance.extra_launch_args.is_some()
+                || edit_instance.custom_env_vars.is_some()
+                || edit_instance.memory.is_some()
+                || edit_instance.force_fullscreen.is_some()
+                || edit_instance.maximize_window.is_some()
+                || edit_instance.game_resolution.is_some()
+                || edit_instance.launch_preparation_timeout.is_some()
+                || edit_instance.hooks.is_some();
+            if has_launch_change {
+                Some(InstanceLaunchOverridesPatch {
                     player: None,
                     instance_mode: None,
                     java_path: edit_instance.java_path,
@@ -491,14 +502,27 @@ fn edit_to_core(edit_instance: EditInstance) -> Result<CoreEditInstance> {
                     launch_preparation_timeout: edit_instance
                         .launch_preparation_timeout,
                     hooks: edit_instance.hooks,
-        }),
-        content_set_patch: Some(AppliedContentSetPatch {
+                })
+            } else {
+                None
+            }
+        },
+        content_set_patch: {
+            let has_content_change = edit_instance.game_version.is_some()
+                || edit_instance.loader.is_some()
+                || edit_instance.loader_version.is_some();
+            if has_content_change {
+                Some(AppliedContentSetPatch {
                     source_kind: None,
                     game_version: edit_instance.game_version,
                     protocol_version: Some(None),
                     loader: edit_instance.loader,
                     loader_version: edit_instance.loader_version,
-        }),
+                })
+            } else {
+                None
+            }
+        },
         last_played: None,
         submitted_time_played: None,
         recent_time_played: None,