diff --git a/static/app/modal.js b/static/app/modal.js
index 16d0419..f906030 100644
--- a/static/app/modal.js
+++ b/static/app/modal.js
@@ -458,7 +458,7 @@ function renderProviderConfig(provider) {
     baseFields.forEach(fieldKey => {
         const displayLabel = getFieldLabel(fieldKey);
         const value = provider[fieldKey];
-        const displayValue = value !== undefined ? value : '';
+        const displayValue = (value !== undefined && value !== null) ? value : '';
         
         // 查找字段定义以获取 placeholder
         const fieldDef = fieldConfigs.find(f => f.id === fieldKey) || fieldConfigs.find(f => f.id.toUpperCase() === fieldKey.toUpperCase()) || {};
@@ -473,7 +473,7 @@ function renderProviderConfig(provider) {
                            value="${displayValue}"
                            readonly
                            data-config-key="${fieldKey}"
-                           data-config-value="${value || ''}"
+                           data-config-value="${(value !== undefined && value !== null) ? value : ''}"
                            placeholder="${placeholder}">
                 </div>
             `;
@@ -502,7 +502,7 @@ function renderProviderConfig(provider) {
                            value="${displayValue}"
                            readonly
                            data-config-key="${fieldKey}"
-                           data-config-value="${value || ''}"
+                           data-config-value="${(value !== undefined && value !== null) ? value : ''}"
                            placeholder="${placeholder}">
                 </div>
             `;
@@ -521,7 +521,7 @@ function renderProviderConfig(provider) {
         const field1Value = provider[field1Key];
         const field1IsPassword = field1Key.toLowerCase().includes('key') || field1Key.toLowerCase().includes('password');
         const field1IsOAuthFilePath = field1Key.includes('OAUTH_CREDS_FILE_PATH');
-        const field1DisplayValue = field1IsPassword && field1Value ? '••••••••' : (field1Value || '');
+        const field1DisplayValue = field1IsPassword && field1Value ? '••••••••' : ((field1Value !== undefined && field1Value !== null) ? field1Value : '');
         const field1Def = fieldConfigs.find(f => f.id === field1Key) || fieldConfigs.find(f => f.id.toUpperCase() === field1Key.toUpperCase()) || {};
         
         if (field1IsPassword) {
@@ -533,7 +533,7 @@ function renderProviderConfig(provider) {
                                value="${field1DisplayValue}"
                                readonly
                                data-config-key="${field1Key}"
-                               data-config-value="${field1Value || ''}"
+                               data-config-value="${(field1Value !== undefined && field1Value !== null) ? field1Value : ''}"
                                placeholder="${field1Def.placeholder || ''}">
                        <button type="button" class="password-toggle" data-target="${field1Key}">
                             <i class="fas fa-eye"></i>
@@ -550,10 +550,10 @@ function renderProviderConfig(provider) {
                     <div class="file-input-group">
                         <input type="text"
                                id="edit-${provider.uuid}-${field1Key}"
-                               value="${field1Value || ''}"
+                               value="${(field1Value !== undefined && field1Value !== null) ? field1Value : ''}"
                                readonly
                                data-config-key="${field1Key}"
-                               data-config-value="${field1Value || ''}"
+                               data-config-value="${(field1Value !== undefined && field1Value !== null) ? field1Value : ''}"
                                placeholder="${field1Def.placeholder || ''}">
                        <button type="button" class="btn btn-outline upload-btn" data-target="edit-${provider.uuid}-${field1Key}" aria-label="上传文件" disabled>
                             <i class="fas fa-upload"></i>
@@ -570,7 +570,7 @@ function renderProviderConfig(provider) {
                            value="${field1DisplayValue}"
                            readonly
                            data-config-key="${field1Key}"
-                           data-config-value="${field1Value || ''}"
+                           data-config-value="${(field1Value !== undefined && field1Value !== null) ? field1Value : ''}"
                            placeholder="${field1Def.placeholder || ''}">
                 </div>
             `;
@@ -583,7 +583,7 @@ function renderProviderConfig(provider) {
             const field2Value = provider[field2Key];
             const field2IsPassword = field2Key.toLowerCase().includes('key') || field2Key.toLowerCase().includes('password');
             const field2IsOAuthFilePath = field2Key.includes('OAUTH_CREDS_FILE_PATH');
-            const field2DisplayValue = field2IsPassword && field2Value ? '••••••••' : (field2Value || '');
+            const field2DisplayValue = field2IsPassword && field2Value ? '••••••••' : ((field2Value !== undefined && field2Value !== null) ? field2Value : '');
             const field2Def = fieldConfigs.find(f => f.id === field2Key) || fieldConfigs.find(f => f.id.toUpperCase() === field2Key.toUpperCase()) || {};
             
             if (field2IsPassword) {
@@ -595,7 +595,7 @@ function renderProviderConfig(provider) {
                                    value="${field2DisplayValue}"
                                    readonly
                                    data-config-key="${field2Key}"
-                                   data-config-value="${field2Value || ''}"
+                                   data-config-value="${(field2Value !== undefined && field2Value !== null) ? field2Value : ''}"
                                    placeholder="${field2Def.placeholder || ''}">
                             <button type="button" class="password-toggle" data-target="${field2Key}">
                                 <i class="fas fa-eye"></i>
@@ -612,10 +612,10 @@ function renderProviderConfig(provider) {
                         <div class="file-input-group">
                             <input type="text"
                                    id="edit-${provider.uuid}-${field2Key}"
-                                   value="${field2Value || ''}"
+                                   value="${(field2Value !== undefined && field2Value !== null) ? field2Value : ''}"
                                    readonly
                                    data-config-key="${field2Key}"
-                                   data-config-value="${field2Value || ''}"
+                                   data-config-value="${(field2Value !== undefined && field2Value !== null) ? field2Value : ''}"
                                    placeholder="${field2Def.placeholder || ''}">
                             <button type="button" class="btn btn-outline upload-btn" data-target="edit-${provider.uuid}-${field2Key}" aria-label="上传文件" disabled>
                                 <i class="fas fa-upload"></i>
@@ -632,7 +632,7 @@ function renderProviderConfig(provider) {
                                value="${field2DisplayValue}"
                                readonly
                                data-config-key="${field2Key}"
-                               data-config-value="${field2Value || ''}"
+                               data-config-value="${(field2Value !== undefined && field2Value !== null) ? field2Value : ''}"
                                placeholder="${field2Def.placeholder || ''}">
                     </div>
                 `;
@@ -831,10 +831,12 @@ function cancelEdit(uuid, event) {
     // 恢复输入框为只读状态
     configInputs.forEach(input => {
         input.readOnly = true;
-        // 恢复显示为密码格式（如果有的话）
+        const originalValue = input.dataset.configValue;
+        // 恢复原始值
         if (input.type === 'password') {
-            const actualValue = input.dataset.configValue;
-            input.value = actualValue ? '••••••••' : '';
+            input.value = originalValue ? '••••••••' : '';
+        } else {
+            input.value = originalValue || '';
         }
     });
     
diff --git a/tls-sidecar/main.go b/tls-sidecar/main.go
index 155ce04..83f0abc 100644
--- a/tls-sidecar/main.go
+++ b/tls-sidecar/main.go
@@ -121,7 +121,11 @@ func (rt *utlsRoundTripper) RoundTrip(req *http.Request) (*http.Response, error)
 
 	if alpn == "h2" {
 		// HTTP/2: 创建 H2 ClientConn
-		cc, err := (&http2.Transport{}).NewClientConn(conn)
+		t2 := &http2.Transport{
+			StrictMaxConcurrentStreams: true,
+			AllowHTTP:                  false,
+		}
+		cc, err := t2.NewClientConn(conn)
 		if err != nil {
 			conn.Close()
 			return nil, fmt.Errorf("h2 client conn: %w", err)
@@ -240,21 +244,31 @@ func handleProxy(w http.ResponseWriter, r *http.Request) {
 	}
 
 	// Copy headers (skip internal + hop-by-hop)
+	// 403 关键修复：彻底清理所有非浏览器标头，严格保持小写
 	for key, vals := range r.Header {
 		lk := strings.ToLower(key)
 		if lk == strings.ToLower(headerTarget) || lk == strings.ToLower(headerProxy) {
 			continue
 		}
+		// 移除所有代理、本地网络特征标头，防止 Cloudflare 识别
 		if lk == "connection" || lk == "keep-alive" || lk == "transfer-encoding" ||
-			lk == "te" || lk == "trailer" || lk == "upgrade" || lk == "host" {
+			lk == "te" || lk == "trailer" || lk == "upgrade" || lk == "host" ||
+			lk == "x-forwarded-for" || lk == "x-real-ip" || lk == "x-forwarded-proto" ||
+			lk == "x-forwarded-host" || lk == "via" || lk == "proxy-connection" ||
+			lk == "cf-connecting-ip" || lk == "true-client-ip" {
 			continue
 		}
-		for _, v := range vals {
-			outReq.Header.Add(key, v)
-		}
+		// 直接通过 map 赋值，确保 Go 的 http2 栈能识别并以原始（小写）形式发出
+		outReq.Header[key] = vals
 	}
 	outReq.Host = parsed.Host
 
+	// 针对 Grok 的特殊处理：如果 Accept-Encoding 包含 br 且环境可能存在压缩协商问题
+	// 强制设置为标准的浏览器组合
+	if ae := outReq.Header["Accept-Encoding"]; len(ae) > 0 {
+		outReq.Header["Accept-Encoding"] = []string{"gzip, deflate, br, zstd"}
+	}
+
 	// Execute via uTLS RoundTripper
 	rt := getOrCreateRT(proxyURL)
 	resp, err := rt.RoundTrip(outReq)
@@ -316,7 +330,8 @@ func dialUTLS(ctx context.Context, network, addr string, proxyURL string) (*utls
 		return nil, fmt.Errorf("tcp dial failed: %w", err)
 	}
 
-	// uTLS 握手 — Chrome 最新指纹 (HelloChrome_Auto 跟随 utls 库更新)
+	// uTLS 握手 — 使用 Chrome 最新自动指纹
+	// 403 错误通过保持标头小写和清理转发标头来解决
 	tlsConn := utls.UClient(rawConn, &utls.Config{
 		ServerName: host,
 		NextProtos: []string{"h2", "http/1.1"},