test(profiles): gate desktop-scope assertion by platform in profile roundtrip

The desktop switch to d2 is cfg-gated to macOS/Windows, but the assertion
expecting d2 was not, so on Linux CI the desktop provider stays at the seeded
d1 and the assertion panics — poisoning the shared test mutex and cascading
into two more failures. Expect d1 on non-desktop platforms.

src-tauri/tests/profile_roundtrip.rs

@@ -218,15 +218,21 @@ fn profile_snapshot_apply_roundtrip_restores_configuration() {
         .expect("get current provider");
     assert_eq!(current.as_deref(), Some("p1"), "provider restored to p1");
 
-    // Claude 分组不再管理 Desktop：Desktop 保持 d2 不变
+    // Claude 分组不再管理 Desktop：apply 后 Desktop 保持切换前的状态不变。
+    // macOS/Windows 上上面已切到 d2；Linux（CI）不支持 Desktop 切换、那行被 cfg 门控
+    // 编译剔除，Desktop 仍是种子值 d1。两种情况都验证 claude-scope apply 不会动 Desktop。
     let current_desktop = state
         .db
         .get_current_provider(AppType::ClaudeDesktop.as_str())
         .expect("get current desktop provider");
+    #[cfg(any(target_os = "macos", windows))]
+    let expected_desktop = "d2";
+    #[cfg(not(any(target_os = "macos", windows)))]
+    let expected_desktop = "d1";
     assert_eq!(
         current_desktop.as_deref(),
-        Some("d2"),
-        "desktop provider stays at d2 after claude-scope apply"
+        Some(expected_desktop),
+        "desktop provider untouched by claude-scope apply"
     );
 
     let servers = state.db.get_all_mcp_servers().expect("get mcp servers");