refactor: rebuild desktop app with Tauri

apps/desktop/index.html

@@ -0,0 +1,43 @@
+<!doctype html>
+<html lang="zh-CN">
+  <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#141414" />
+    <style>
+      html,
+      body,
+      #root {
+        width: 100%;
+        height: 100%;
+        margin: 0;
+        background-color: var(--vscode-editor-background, var(--startup-background, #141414));
+      }
+    </style>
+    <script>
+      (() => {
+        try {
+          const theme = localStorage.getItem("cursor-byok.theme") === "default-light"
+            ? "default-light"
+            : "default-dark";
+          const light = theme === "default-light";
+          const background = light ? "#fcfcfc" : "#141414";
+          document.documentElement.dataset.theme = theme;
+          document.documentElement.style.setProperty("--startup-background", background);
+          document.documentElement.style.colorScheme = light ? "light" : "dark";
+          document.querySelector('meta[name="theme-color"]')?.setAttribute("content", background);
+        } catch {
+          // The inline CSS already provides the dark-theme fallback.
+        }
+      })();
+    </script>
+    <title>Cursor BYOK</title>
+  </head>
+
+  <body>
+    <noscript>Cursor BYOK 需要 JavaScript 才能运行。</noscript>
+    <div id="root"></div>
+
+    <script src="/src/index.tsx" type="module"></script>
+  </body>
+</html>