refactor: replace CodeMirror with plain textarea in config editors

Replace JsonEditor (CodeMirror) with plain HTML textarea elements in Claude
config editors to maintain consistency with Codex config editors and eliminate
theme conflicts.

Changes:
- Replace JsonEditor with textarea in ClaudeConfigEditor.tsx
- Replace JsonEditor with textarea in CommonConfigEditor.tsx
- Remove unnecessary dark mode detection logic
- Remove wrapper div with border class that caused double borders
- Apply unified border design system (border-border-default)
- Keep JsonEditor in UsageScriptModal for JavaScript code editing

Benefits:
- Eliminates CodeMirror theme conflicts with oneDark
- Simplifies codebase by removing unnecessary abstractions
- Consistent styling across all config input fields
- Automatic theme adaptation via CSS variables

src/components/JsonEditor.tsx

@@ -78,6 +78,20 @@ const JsonEditor: React.FC<JsonEditorProps> = ({
 
     // 创建编辑器扩展
     const minHeightPx = height ? undefined : Math.max(1, rows) * 18;
+
+    // 使用 baseTheme 定义基础样式，优先级低于 oneDark，但可以正确响应主题
+    const baseTheme = EditorView.baseTheme({
+      "&light .cm-editor, &dark .cm-editor": {
+        border: "1px solid hsl(var(--border))",
+        borderRadius: "0.5rem",
+      },
+      "&light .cm-editor.cm-focused, &dark .cm-editor.cm-focused": {
+        outline: "none",
+        borderColor: "hsl(var(--primary))",
+      },
+    });
+
+    // 使用 theme 定义尺寸和字体样式
     const sizingTheme = EditorView.theme({
       "&": height ? { height } : { minHeight: `${minHeightPx}px` },
       ".cm-scroller": { overflow: "auto" },
@@ -86,20 +100,13 @@ const JsonEditor: React.FC<JsonEditorProps> = ({
           "ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace",
         fontSize: "14px",
       },
-      ".cm-editor": {
-        border: "1px solid hsl(var(--border))",
-        borderRadius: "0.5rem",
-      },
-      ".cm-editor.cm-focused": {
-        outline: "none",
-        borderColor: "hsl(var(--primary))",
-      },
     });
 
     const extensions = [
       basicSetup,
       language === "javascript" ? javascript() : json(),
       placeholder(placeholderText || ""),
+      baseTheme,
       sizingTheme,
       jsonLinter,
       EditorView.updateListener.of((update) => {
@@ -113,6 +120,19 @@ const JsonEditor: React.FC<JsonEditorProps> = ({
     // 如果启用深色模式，添加深色主题
     if (darkMode) {
       extensions.push(oneDark);
+      // 在 oneDark 之后强制覆盖边框样式
+      extensions.push(
+        EditorView.theme({
+          ".cm-editor": {
+            border: "1px solid hsl(var(--border))",
+            borderRadius: "0.5rem",
+          },
+          ".cm-editor.cm-focused": {
+            outline: "none",
+            borderColor: "hsl(var(--primary))",
+          },
+        }),
+      );
     }
 
     // 创建初始状态