refactor: simplify TOML common config handling by removing markers

- Remove COMMON_CONFIG_MARKER_START/END constants
- Simplify config snippet addition/removal logic
- Use natural append/replace approach instead of markers
- Fix unused variable warning
- Improve user experience with cleaner config output

src/components/JsonEditor.tsx

@@ -62,7 +62,7 @@ const JsonEditor: React.FC<JsonEditorProps> = ({
 
         return diagnostics;
       }),
-    [showValidation]
+    [showValidation],
   );
 
   useEffect(() => {

src/components/ProviderForm.tsx

@@ -131,7 +131,8 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
 
   // Codex 通用配置状态
   const [useCodexCommonConfig, setUseCodexCommonConfig] = useState(false);
-  const [codexCommonConfigSnippet, setCodexCommonConfigSnippetState] = useState<string>(() => {
+  const [codexCommonConfigSnippet, setCodexCommonConfigSnippetState] =
+    useState<string>(() => {
       if (typeof window === "undefined") {
         return DEFAULT_CODEX_COMMON_CONFIG_SNIPPET;
       }
@@ -217,7 +218,11 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
   useEffect(() => {
     if (initialData) {
       if (!isCodex) {
-        const configString = JSON.stringify(initialData.settingsConfig, null, 2);
+        const configString = JSON.stringify(
+          initialData.settingsConfig,
+          null,
+          2,
+        );
         const hasCommon = hasCommonConfigSnippet(
           configString,
           commonConfigSnippet,
@@ -235,7 +240,9 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
           };
           if (config.env) {
             setClaudeModel(config.env.ANTHROPIC_MODEL || "");
-            setClaudeSmallFastModel(config.env.ANTHROPIC_SMALL_FAST_MODEL || "");
+            setClaudeSmallFastModel(
+              config.env.ANTHROPIC_SMALL_FAST_MODEL || "",
+            );
             setBaseUrl(config.env.ANTHROPIC_BASE_URL || ""); // 初始化基础 URL
 
             // 初始化 Kimi 模型选择
@@ -254,7 +261,13 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
         setUseCodexCommonConfig(hasCommon);
       }
     }
-  }, [initialData, commonConfigSnippet, codexCommonConfigSnippet, isCodex, codexConfig]);
+  }, [
+    initialData,
+    commonConfigSnippet,
+    codexCommonConfigSnippet,
+    isCodex,
+    codexConfig,
+  ]);
 
   // 当选择预设变化时，同步类别
   useEffect(() => {
@@ -529,10 +542,7 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
     setBaseUrl(""); // 清空基础 URL
 
     // 同步通用配置状态
-    const hasCommon = hasCommonConfigSnippet(
+    const hasCommon = hasCommonConfigSnippet(configString, commonConfigSnippet);
-      configString,
-      commonConfigSnippet,
-    );
     setUseCommonConfig(hasCommon);
     setCommonConfigError("");
 
@@ -643,10 +653,7 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
     updateSettingsConfigValue(configString);
 
     // 同步通用配置开关
-    const hasCommon = hasCommonConfigSnippet(
+    const hasCommon = hasCommonConfigSnippet(configString, commonConfigSnippet);
-      configString,
-      commonConfigSnippet,
-    );
     setUseCommonConfig(hasCommon);
   };
 
@@ -681,7 +688,8 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
 
   // Codex: 处理通用配置开关
   const handleCodexCommonConfigToggle = (checked: boolean) => {
-    const { updatedConfig, error: snippetError } = updateTomlCommonConfigSnippet(
+    const { updatedConfig, error: snippetError } =
+      updateTomlCommonConfigSnippet(
         codexConfig,
         codexCommonConfigSnippet,
         checked,
@@ -753,10 +761,7 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
     // 保存 Codex 通用配置到 localStorage
     if (typeof window !== "undefined") {
       try {
-        window.localStorage.setItem(
+        window.localStorage.setItem(CODEX_COMMON_CONFIG_STORAGE_KEY, value);
-          CODEX_COMMON_CONFIG_STORAGE_KEY,
-          value,
-        );
       } catch {
         // ignore localStorage 写入失败
       }
@@ -1177,7 +1182,9 @@ const ProviderForm: React.FC<ProviderFormProps> = ({
                 useCommonConfig={useCodexCommonConfig}
                 onCommonConfigToggle={handleCodexCommonConfigToggle}
                 commonConfigSnippet={codexCommonConfigSnippet}
-                onCommonConfigSnippetChange={handleCodexCommonConfigSnippetChange}
+                onCommonConfigSnippetChange={
+                  handleCodexCommonConfigSnippetChange
+                }
                 commonConfigError={codexCommonConfigError}
                 authError={codexAuthError}
               />

src/components/ProviderForm/ClaudeConfigEditor.tsx

@@ -120,9 +120,7 @@ const ClaudeConfigEditor: React.FC<ClaudeConfigEditorProps> = ({
         rows={12}
       />
       {configError && (
-        <p className="text-xs text-red-500 dark:text-red-400">
+        <p className="text-xs text-red-500 dark:text-red-400">{configError}</p>
-          {configError}
-        </p>
       )}
       <p className="text-xs text-gray-500 dark:text-gray-400">
         完整的 Claude Code settings.json 配置内容

src/components/ProviderForm/CodexConfigEditor.tsx

@@ -97,9 +97,7 @@ const CodexConfigEditor: React.FC<CodexConfigEditorProps> = ({
           data-enable-grammarly="false"
         />
         {authError && (
-          <p className="text-xs text-red-500 dark:text-red-400">
+          <p className="text-xs text-red-500 dark:text-red-400">{authError}</p>
-            {authError}
-          </p>
         )}
         <p className="text-xs text-gray-500 dark:text-gray-400">
           Codex auth.json 配置内容
@@ -194,7 +192,9 @@ const CodexConfigEditor: React.FC<CodexConfigEditorProps> = ({
               </p>
               <textarea
                 value={commonConfigSnippet}
-                onChange={(e) => handleCommonConfigSnippetChange(e.target.value)}
+                onChange={(e) =>
+                  handleCommonConfigSnippetChange(e.target.value)
+                }
                 placeholder={`# Common Codex config
 # Add your common TOML configuration here`}
                 rows={12}

src/utils/providerConfigUtils.ts

@@ -22,7 +22,10 @@ const deepMerge = (
   return target;
 };
 
-const deepRemove = (target: Record<string, any>, source: Record<string, any>) => {
+const deepRemove = (
+  target: Record<string, any>,
+  source: Record<string, any>,
+) => {
   Object.entries(source).forEach(([key, value]) => {
     if (!(key in target)) return;
 
@@ -59,7 +62,7 @@ const isSubset = (target: any, source: any): boolean => {
 const deepClone = <T>(obj: T): T => {
   if (obj === null || typeof obj !== "object") return obj;
   if (obj instanceof Date) return new Date(obj.getTime()) as T;
-  if (obj instanceof Array) return obj.map(item => deepClone(item)) as T;
+  if (obj instanceof Array) return obj.map((item) => deepClone(item)) as T;
   if (obj instanceof Object) {
     const clonedObj = {} as T;
     for (const key in obj) {
@@ -78,7 +81,10 @@ export interface UpdateCommonConfigResult {
 }
 
 // 验证JSON配置格式
-export const validateJsonConfig = (value: string, fieldName: string = "配置"): string => {
+export const validateJsonConfig = (
+  value: string,
+  fieldName: string = "配置",
+): string => {
   if (!value.trim()) {
     return "";
   }
@@ -205,14 +211,14 @@ export const setApiKeyInConfig = (
 
 // ========== TOML Config Utilities ==========
 
-const COMMON_CONFIG_MARKER_START = "# === COMMON CONFIG START ===";
-const COMMON_CONFIG_MARKER_END = "# === COMMON CONFIG END ===";
-
 export interface UpdateTomlCommonConfigResult {
   updatedConfig: string;
   error?: string;
 }
 
+// 保存之前的通用配置片段，用于替换操作
+let previousCommonSnippet = "";
+
 // 将通用配置片段写入/移除 TOML 配置
 export const updateTomlCommonConfigSnippet = (
   tomlString: string,
@@ -220,51 +226,50 @@ export const updateTomlCommonConfigSnippet = (
   enabled: boolean,
 ): UpdateTomlCommonConfigResult => {
   if (!snippetString.trim()) {
-    // 如果片段为空，移除已存在的通用配置部分
+    // 如果片段为空，直接返回原始配置
-    const cleaned = removeTomlCommonConfig(tomlString);
     return {
-      updatedConfig: cleaned,
+      updatedConfig: tomlString,
     };
   }
 
   if (enabled) {
     // 添加通用配置
-    const withoutOld = removeTomlCommonConfig(tomlString);
+    // 先移除旧的通用配置（如果有）
-    const commonSection = `\n${COMMON_CONFIG_MARKER_START}\n${snippetString}\n${COMMON_CONFIG_MARKER_END}\n`;
+    let updatedConfig = tomlString;
+    if (previousCommonSnippet && tomlString.includes(previousCommonSnippet)) {
+      updatedConfig = tomlString.replace(previousCommonSnippet, "");
+    }
+
+    // 在文件末尾添加新的通用配置
+    // 确保有适当的换行
+    const needsNewline = updatedConfig && !updatedConfig.endsWith("\n");
+    updatedConfig =
+      updatedConfig + (needsNewline ? "\n\n" : "\n") + snippetString;
+
+    // 保存当前通用配置片段
+    previousCommonSnippet = snippetString;
+
     return {
-      updatedConfig: withoutOld + commonSection,
+      updatedConfig: updatedConfig.trim() + "\n",
     };
   } else {
     // 移除通用配置
-    const cleaned = removeTomlCommonConfig(tomlString);
+    if (tomlString.includes(snippetString)) {
+      const updatedConfig = tomlString.replace(snippetString, "");
+      // 清理多余的空行
+      const cleaned = updatedConfig.replace(/\n{3,}/g, "\n\n").trim();
+
+      // 清空保存的状态
+      previousCommonSnippet = "";
+
       return {
-      updatedConfig: cleaned,
+        updatedConfig: cleaned ? cleaned + "\n" : "",
       };
     }
+    return {
+      updatedConfig: tomlString,
     };
-
-// 从 TOML 中移除通用配置部分
-const removeTomlCommonConfig = (tomlString: string): string => {
-  const startIdx = tomlString.indexOf(COMMON_CONFIG_MARKER_START);
-  const endIdx = tomlString.indexOf(COMMON_CONFIG_MARKER_END);
-  
-  if (startIdx === -1 || endIdx === -1) {
-    return tomlString;
   }
-  
-  // 找到标记前的换行符（如果有）
-  let realStartIdx = startIdx;
-  if (startIdx > 0 && tomlString[startIdx - 1] === '\n') {
-    realStartIdx = startIdx - 1;
-  }
-  
-  // 找到标记后的换行符（如果有）
-  let realEndIdx = endIdx + COMMON_CONFIG_MARKER_END.length;
-  if (realEndIdx < tomlString.length && tomlString[realEndIdx] === '\n') {
-    realEndIdx = realEndIdx + 1;
-  }
-  
-  return tomlString.slice(0, realStartIdx) + tomlString.slice(realEndIdx);
 };
 
 // 检查 TOML 配置是否已包含通用配置片段
@@ -274,17 +279,11 @@ export const hasTomlCommonConfigSnippet = (
 ): boolean => {
   if (!snippetString.trim()) return false;
 
-  const startIdx = tomlString.indexOf(COMMON_CONFIG_MARKER_START);
+  // 简单检查配置是否包含片段内容
-  const endIdx = tomlString.indexOf(COMMON_CONFIG_MARKER_END);
+  // 去除空白字符后比较，避免格式差异影响
+  const normalizeWhitespace = (str: string) => str.replace(/\s+/g, " ").trim();
 
-  if (startIdx === -1 || endIdx === -1 || startIdx >= endIdx) {
+  return normalizeWhitespace(tomlString).includes(
-    return false;
+    normalizeWhitespace(snippetString),
-  }
+  );
-  
-  // 提取标记之间的内容
-  const existingSnippet = tomlString
-    .slice(startIdx + COMMON_CONFIG_MARKER_START.length, endIdx)
-    .trim();
-  
-  return existingSnippet === snippetString.trim();
 };