- fix(linux): disable modal backdrop blur on Linux (WebKitGTK/Wayland) to prevent freeze when opening Add Provider panel

- refactor(ui): add runtime platform detector and conditionally apply blur only on non-Linux platforms
- chore: verify typecheck and renderer build succeed; no functional regression expected

src/components/SettingsModal.tsx

@@ -12,6 +12,7 @@ import "../lib/tauri-api";
 import { relaunchApp } from "../lib/updater";
 import { useUpdate } from "../contexts/UpdateContext";
 import type { Settings } from "../types";
+import { isLinux } from "../lib/platform";
 
 interface SettingsModalProps {
   onClose: () => void;
@@ -163,7 +164,11 @@ export default function SettingsModal({ onClose }: SettingsModalProps) {
         if (e.target === e.currentTarget) onClose();
       }}
     >
-      <div className="absolute inset-0 bg-black/50 dark:bg-black/70 backdrop-blur-sm" />
+      <div
+        className={`absolute inset-0 bg-black/50 dark:bg-black/70${
+          isLinux() ? "" : " backdrop-blur-sm"
+        }`}
+      />
       <div className="relative bg-white dark:bg-gray-900 rounded-xl shadow-2xl w-[500px] overflow-hidden">
         {/* 标题栏 */}
         <div className="flex items-center justify-between px-6 py-4 border-b border-gray-200 dark:border-gray-800">