🐛 fix(redis): 修复多节点连接编辑回填主节点

- 编辑 Redis Sentinel/Cluster 配置时优先保留已保存 host:port 作为主节点

- 合并 hosts 附加节点并去重，避免主节点被附加节点替换

- 补充连接弹窗 Redis 多节点回填回归断言

frontend/src/components/ConnectionModal.edit-password.test.tsx

@@ -53,6 +53,14 @@ describe('ConnectionModal Redis Sentinel configuration', () => {
     expect(source).toContain('form.setFieldValue("port", 26379)');
     expect(source).toContain('form.setFieldValue("port", 6379)');
   });
+
+  it('keeps the saved host as the primary Redis node when editing multi-node configs', () => {
+    expect(source).toContain('const savedPrimaryAddress = isFileDbConfigType');
+    expect(source).toContain('savedPrimaryAddress,');
+    expect(source).toContain('...(Array.isArray(config.hosts) ? config.hosts : [])');
+    expect(source).toContain('const redisHosts =');
+    expect(source).toContain('configType === "redis" ? normalizedHosts.slice(1) : [];');
+  });
 });
 
 describe('ConnectionModal MongoDB configuration', () => {

frontend/src/components/ConnectionModal.tsx

@@ -2223,18 +2223,27 @@ const ConnectionModal: React.FC<{
         const defaultPort = getDefaultPortByType(configType);
         const isFileDbConfigType = isFileDatabaseType(configType);
         const jvmDefaultValues = buildDefaultJVMConnectionValues();
+        const savedPrimaryAddress = isFileDbConfigType
+          ? ""
+          : toAddress(
+              config.host || "localhost",
+              Number(config.port || defaultPort),
+              defaultPort,
+            );
         const normalizedHosts = isFileDbConfigType
           ? []
-          : normalizeAddressList(config.hosts, defaultPort);
+          : normalizeAddressList(
+              [
+                savedPrimaryAddress,
+                ...(Array.isArray(config.hosts) ? config.hosts : []),
+              ],
+              defaultPort,
+            );
         const primaryAddress = isFileDbConfigType
           ? null
           : parseHostPort(
               normalizedHosts[0] ||
-                toAddress(
-                  config.host || "localhost",
-                  Number(config.port || defaultPort),
-                  defaultPort,
-                ),
+                savedPrimaryAddress,
               defaultPort,
             );
         const primaryHost = isFileDbConfigType