Validate remote MCP URLs in config UI

web/frontend/src/components/config/config-page.tsx

@@ -338,6 +338,20 @@ export function ConfigPage() {
               throw new Error(`MCP server ${server.name} requires a URL.`)
             }
 
+            try {
+              const parsedURL = new URL(server.url)
+              if (
+                parsedURL.protocol !== "http:" &&
+                parsedURL.protocol !== "https:"
+              ) {
+                throw new Error("invalid protocol")
+              }
+            } catch {
+              throw new Error(
+                `MCP server ${server.name} requires a valid HTTP(S) URL.`,
+              )
+            }
+
             return [
               server.name,
               {

web/frontend/src/components/config/config-sections.tsx

@@ -399,6 +399,42 @@ export function MCPSection({
                         onServerFieldChange(server.id, "enabled", checked)
                       }
                     />
+
+                    <Select
+                      value={
+                        server.deferredOverride === null
+                          ? "inherit"
+                          : server.deferredOverride
+                            ? "deferred"
+                            : "eager"
+                      }
+                      onValueChange={(value) =>
+                        onServerFieldChange(
+                          server.id,
+                          "deferredOverride",
+                          value === "inherit" ? null : value === "deferred",
+                        )
+                      }
+                    >
+                      <SelectTrigger>
+                        <SelectValue
+                          placeholder={t(
+                            "pages.config.mcp_server_discovery_mode",
+                          )}
+                        />
+                      </SelectTrigger>
+                      <SelectContent>
+                        <SelectItem value="inherit">
+                          {t("pages.config.mcp_server_discovery_mode_inherit")}
+                        </SelectItem>
+                        <SelectItem value="deferred">
+                          {t("pages.config.mcp_server_discovery_mode_deferred")}
+                        </SelectItem>
+                        <SelectItem value="eager">
+                          {t("pages.config.mcp_server_discovery_mode_eager")}
+                        </SelectItem>
+                      </SelectContent>
+                    </Select>
                   </div>
 
                   {server.type !== "stdio" ? (
@@ -442,6 +478,19 @@ export function MCPSection({
                           )
                         }
                       />
+                      <Input
+                        value={server.envFile}
+                        placeholder={t(
+                          "pages.config.mcp_server_env_file_placeholder",
+                        )}
+                        onChange={(e) =>
+                          onServerFieldChange(
+                            server.id,
+                            "envFile",
+                            e.target.value,
+                          )
+                        }
+                      />
                       <Textarea
                         value={server.argsText}
                         placeholder={t(

web/frontend/src/i18n/locales/en.json

@@ -720,9 +720,14 @@
       "mcp_server_add": "Add server",
       "mcp_server_remove": "Remove",
       "mcp_server_enabled": "Enabled",
+      "mcp_server_discovery_mode": "Discovery mode",
+      "mcp_server_discovery_mode_inherit": "Follow global discovery mode",
+      "mcp_server_discovery_mode_deferred": "Deferred discovery",
+      "mcp_server_discovery_mode_eager": "Eager registration",
       "mcp_server_name_placeholder": "Server name (e.g. github)",
       "mcp_server_url_placeholder": "Server URL (e.g. https://example.com/mcp)",
       "mcp_server_command_placeholder": "Command (e.g. npx)",
+      "mcp_server_env_file_placeholder": "Environment file path (optional)",
       "mcp_server_args_placeholder": "Args, one per line",
       "mcp_server_env_placeholder": "Environment JSON object",
       "mcp_server_headers_placeholder": "Headers JSON object",

web/frontend/src/i18n/locales/zh.json

@@ -720,9 +720,14 @@
       "mcp_server_add": "添加服务器",
       "mcp_server_remove": "移除",
       "mcp_server_enabled": "已启用",
+      "mcp_server_discovery_mode": "发现模式",
+      "mcp_server_discovery_mode_inherit": "跟随全局发现模式",
+      "mcp_server_discovery_mode_deferred": "延迟发现",
+      "mcp_server_discovery_mode_eager": "立即注册",
       "mcp_server_name_placeholder": "服务器名称（例如 github）",
       "mcp_server_url_placeholder": "服务器 URL（例如 https://example.com/mcp）",
       "mcp_server_command_placeholder": "命令（例如 npx）",
+      "mcp_server_env_file_placeholder": "环境变量文件路径（可选）",
       "mcp_server_args_placeholder": "参数（每行一个）",
       "mcp_server_env_placeholder": "环境变量 JSON 对象",
       "mcp_server_headers_placeholder": "请求头 JSON 对象",