更新 package.json 和 pnpm-lock.yaml，添加 class-variance-authority 依赖；修改 main.tsx 中的 basename 引入方式；新增 theme.css 样式文件

pnpm-lock.yaml

@@ -17,6 +17,9 @@ importers:
       '@tanstack/react-router':
         specifier: ^1.158.0
         version: 1.158.0(react-dom@19.2.4(react@19.2.4))(react@19.2.4)
+      class-variance-authority:
+        specifier: ^0.7.1
+        version: 0.7.1
       clsx:
         specifier: ^2.1.1
         version: 2.1.1
@@ -1197,6 +1200,9 @@ packages:
     resolution: {integrity: sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==}
     engines: {node: '>= 8.10.0'}
 
+  class-variance-authority@0.7.1:
+    resolution: {integrity: sha512-Ka+9Trutv7G8M6WT6SeiRWz792K5qEqIGEGzXKhAE6xOWAY6pPH8U+9IY3oCMv6kqTmLsv7Xh/2w2RigkePMsg==}
+
   clsx@1.2.1:
     resolution: {integrity: sha512-EcR6r5a8bj6pu3ycsa/E/cKVGuTgZJZdsyUYHOksG/UHIiKfjxzRxYJpyVBwYaQeOvghal9fcc4PidlgzugAQg==}
     engines: {node: '>=6'}
@@ -2910,6 +2916,10 @@ snapshots:
     optionalDependencies:
       fsevents: 2.3.3
 
+  class-variance-authority@0.7.1:
+    dependencies:
+      clsx: 2.1.1
+
   clsx@1.2.1: {}
 
   clsx@2.1.1: {}