✨ feat(connection): 支持生产保护默认折叠

- 为连接配置分区卡片增加可折叠渲染能力

- 生产连接保护默认收起，仅保留标题说明和当前策略标签

- 补充中英文折叠态与展开态回归测试

frontend/src/components/ConnectionModal.i18n.test.tsx

@@ -162,6 +162,8 @@ vi.mock("@ant-design/icons", () => {
     GatewayOutlined: Icon,
     SafetyCertificateOutlined: Icon,
     ThunderboltOutlined: Icon,
+    DownOutlined: Icon,
+    RightOutlined: Icon,
   };
 });
 
@@ -526,7 +528,24 @@ describe("ConnectionModal i18n", () => {
         findClickableCard(renderer!, sourceLabel).props.onClick();
       });
 
-      const pageText = textContent(renderer!.toJSON());
+      let pageText = textContent(renderer!.toJSON());
+      expect(pageText).toContain(expectations[0]);
+      expect(pageText).toContain(
+        language === "zh-CN" ? "未限制" : "No restrictions",
+      );
+      expect(pageText).not.toContain(expectations[1]);
+      expect(pageText).not.toContain(expectations[2]);
+
+      const protectionToggle = renderer!.root.findAll(
+        (node) => node.props?.["data-connection-config-section-toggle"] === "readOnly",
+      )[0];
+      expect(protectionToggle.props["aria-expanded"]).toBe(false);
+
+      await act(async () => {
+        protectionToggle.props.onClick({ stopPropagation: vi.fn() });
+      });
+
+      pageText = textContent(renderer!.toJSON());
       expectations.forEach((expected) => {
         expect(pageText).toContain(expected);
       });

frontend/src/components/ConnectionModal.tsx

@@ -34,6 +34,8 @@ import {
   GatewayOutlined,
   SafetyCertificateOutlined,
   ThunderboltOutlined,
+  DownOutlined,
+  RightOutlined,
 } from "@ant-design/icons";
 import {
   getDbIcon,
@@ -693,14 +695,21 @@ const ConnectionModal: React.FC<{
     title: string,
     description: string,
     badge?: React.ReactNode,
+    options?: {
+      cursor?: React.CSSProperties["cursor"];
+      marginBottom?: number;
+      onClick?: () => void;
+    },
   ) => (
     <div
+      onClick={options?.onClick}
       style={{
         display: "flex",
         alignItems: "flex-start",
         justifyContent: "space-between",
         gap: 12,
-        marginBottom: 14,
+        marginBottom: options?.marginBottom ?? 14,
+        cursor: options?.cursor,
       }}
     >
       <div style={{ display: "flex", alignItems: "flex-start", gap: 10 }}>
@@ -758,20 +767,65 @@ const ConnectionModal: React.FC<{
     icon,
     children,
     badge,
+    collapsible,
+    expanded = true,
+    onToggle,
   }: {
     sectionKey: ConnectionConfigSectionKey;
     icon: React.ReactNode;
     children: React.ReactNode;
     badge?: React.ReactNode;
+    collapsible?: boolean;
+    expanded?: boolean;
+    onToggle?: () => void;
   }) => {
     const copy = getConnectionConfigSectionCopy(sectionKey);
+    const showChildren = !collapsible || expanded;
+    const resolvedBadge = collapsible ? (
+      <Space size={8}>
+        {badge}
+        <Button
+          type="text"
+          size="small"
+          aria-label={copy.title}
+          aria-expanded={expanded}
+          data-connection-config-section-toggle={sectionKey}
+          onClick={(event) => {
+            event.stopPropagation();
+            onToggle?.();
+          }}
+          style={{
+            width: 26,
+            height: 26,
+            minWidth: 26,
+            padding: 0,
+            borderRadius: 8,
+            color: overlayTheme.mutedText,
+          }}
+        >
+          {expanded ? <DownOutlined /> : <RightOutlined />}
+        </Button>
+      </Space>
+    ) : badge;
     return (
       <div
         data-connection-config-section={sectionKey}
         style={configSectionCardStyle()}
       >
-        {renderJvmSectionHeader(icon, copy.title, copy.description, badge)}
-        {children}
+        {renderJvmSectionHeader(
+          icon,
+          copy.title,
+          copy.description,
+          resolvedBadge,
+          collapsible
+            ? {
+                cursor: "pointer",
+                marginBottom: showChildren ? 14 : 0,
+                onClick: onToggle,
+              }
+            : undefined,
+        )}
+        {showChildren ? children : null}
       </div>
     );
   };

frontend/src/components/connectionModal/ConnectionModalStep2.tsx

@@ -194,7 +194,14 @@ const ConnectionModalStep2: React.FC<ConnectionModalStep2Props> = (props) => {
     useSSL,
   } = props;
 
-const renderStep2 = () => {
+  const [readOnlyProtectionExpanded, setReadOnlyProtectionExpanded] =
+    React.useState(false);
+
+  React.useEffect(() => {
+    setReadOnlyProtectionExpanded(false);
+  }, [dbType]);
+
+  const renderStep2 = () => {
   const showConnectionReadOnlyField = supportsConnectionReadOnlyMode({
     type: dbType,
     driver: form.getFieldValue("driver"),
@@ -1364,6 +1371,10 @@ const renderStep2 = () => {
               renderConfigSectionCard({
                 sectionKey: "readOnly",
                 icon: <SafetyCertificateOutlined />,
+                collapsible: true,
+                expanded: readOnlyProtectionExpanded,
+                onToggle: () =>
+                  setReadOnlyProtectionExpanded((expanded) => !expanded),
                 badge: (
                   <Tag
                     color={