🐛 fix(redis): 修复 Sentinel 切换数据库配置丢失

- 切换 Redis DB 时复用完整 Connect 逻辑，保留 Sentinel、TLS、SSH 等连接参数

- 补充 Sentinel 切 DB 与 Redis RPC 配置字段回归测试

frontend/src/utils/connectionRpcConfig.test.ts

@@ -199,6 +199,30 @@ describe('buildRpcConnectionConfig', () => {
     });
   });
 
+  it('preserves Redis cluster and Sentinel topology fields for RPC calls', () => {
+    const result = buildRpcConnectionConfig({
+      id: 'conn-redis-sentinel',
+      type: 'redis',
+      host: 'sentinel-a.local',
+      port: '26379' as unknown as number,
+      hosts: ['sentinel-b.local:26379', 'sentinel-c.local:26379'],
+      topology: 'sentinel',
+      user: 'default',
+      password: 'redis-secret',
+      redisSentinelMaster: 'mymaster',
+      redisSentinelUser: 'sentinel-user',
+      redisSentinelPassword: 'sentinel-secret',
+      redisDB: '3' as unknown as number,
+    } as any);
+
+    expect(result.topology).toBe('sentinel');
+    expect(result.hosts).toEqual(['sentinel-b.local:26379', 'sentinel-c.local:26379']);
+    expect(result.redisSentinelMaster).toBe('mymaster');
+    expect(result.redisSentinelUser).toBe('sentinel-user');
+    expect(result.redisSentinelPassword).toBe('sentinel-secret');
+    expect(result.redisDB).toBe(3);
+  });
+
   it('returns a Wails connection model instance for RPC compatibility', () => {
     const result = buildRpcConnectionConfig({
       id: 'conn-model',

internal/redis/redis_impl.go

@@ -49,6 +49,10 @@ const (
 	redisSearchMaxDuration            = 3 * time.Second
 )
 
+var redisDBSwitchConnect = func(client *RedisClientImpl, config connection.ConnectionConfig) error {
+	return client.Connect(config)
+}
+
 // NewRedisClient creates a new Redis client instance
 func NewRedisClient() RedisClient {
 	return &RedisClientImpl{}
@@ -1589,49 +1593,18 @@ func (r *RedisClientImpl) SelectDB(index int) error {
 		return fmt.Errorf("数据库索引必须在 0-15 之间")
 	}
 
-	// Create new client with different DB
-	addr := ""
-	if len(r.seedAddrs) > 0 {
-		addr = r.seedAddrs[0]
-	}
-	if r.forwarder != nil {
-		addr = r.forwarder.LocalAddr
-	}
-	if addr == "" {
-		addr = fmt.Sprintf("%s:%d", r.config.Host, r.config.Port)
-	}
-
-	timeout := normalizeRedisTimeout(r.config.Timeout)
-
-	opts := &redis.Options{
-		Addr:         addr,
-		Username:     strings.TrimSpace(r.config.User),
-		Password:     r.config.Password,
-		DB:           index,
-		DialTimeout:  timeout,
-		ReadTimeout:  timeout,
-		WriteTimeout: timeout,
-	}
-
-	newClient := redis.NewClient(opts)
-
-	ctx, cancel := context.WithTimeout(context.Background(), timeout)
-	defer cancel()
-
-	if err := newClient.Ping(ctx).Err(); err != nil {
-		newClient.Close()
+	nextConfig := r.config
+	nextConfig.RedisDB = index
+	nextClient := &RedisClientImpl{}
+	if err := redisDBSwitchConnect(nextClient, nextConfig); err != nil {
 		return fmt.Errorf("切换数据库失败: %w", err)
 	}
 
-	// Close old client and replace
-	if r.client != nil {
-		_ = r.client.Close()
+	oldClient := r.client
+	*r = *nextClient
+	if oldClient != nil {
+		_ = oldClient.Close()
 	}
-	r.client = newClient
-	r.singleClient = newClient
-	r.clusterClient = nil
-	r.currentDB = index
-	r.config.RedisDB = index
 
 	logger.Infof("Redis 切换到数据库: db%d", index)
 	return nil

internal/redis/redis_impl_test.go

@@ -9,6 +9,8 @@ import (
 	"sort"
 	"strings"
 	"testing"
+
+	goredis "github.com/redis/go-redis/v9"
 )
 
 // 回归保护：HGETALL 在 RESP3 下返回 map[interface{}]interface{}（go-redis v9 默认 RESP3），
@@ -275,6 +277,70 @@ func TestRedisClusterKeepsSSHValidation(t *testing.T) {
 	}
 }
 
+func TestRedisSelectDBReconnectsWithSentinelConfig(t *testing.T) {
+	oldConnect := redisDBSwitchConnect
+	defer func() {
+		redisDBSwitchConnect = oldConnect
+	}()
+
+	var captured connection.ConnectionConfig
+	redisDBSwitchConnect = func(client *RedisClientImpl, config connection.ConnectionConfig) error {
+		captured = config
+		next := goredis.NewClient(&goredis.Options{Addr: "127.0.0.1:0"})
+		client.client = next
+		client.singleClient = next
+		client.config = config
+		client.currentDB = config.RedisDB
+		return nil
+	}
+
+	oldClient := goredis.NewClient(&goredis.Options{Addr: "127.0.0.1:0"})
+	client := &RedisClientImpl{
+		client:       oldClient,
+		singleClient: oldClient,
+		config: connection.ConnectionConfig{
+			Type:                  "redis",
+			Host:                  "sentinel-a.local",
+			Port:                  26379,
+			Hosts:                 []string{"sentinel-b.local:26379", "sentinel-c.local:26379"},
+			Topology:              "sentinel",
+			User:                  "data-user",
+			Password:              "data-pass",
+			RedisSentinelMaster:   "mymaster",
+			RedisSentinelUser:     "sentinel-user",
+			RedisSentinelPassword: "sentinel-pass",
+			UseSSL:                true,
+			SSLMode:               "required",
+			RedisDB:               0,
+		},
+		currentDB: 0,
+	}
+	defer client.Close()
+
+	if err := client.SelectDB(6); err != nil {
+		t.Fatalf("SelectDB returned error: %v", err)
+	}
+
+	if captured.RedisDB != 6 || client.currentDB != 6 {
+		t.Fatalf("expected RedisDB/currentDB=6, captured=%d current=%d", captured.RedisDB, client.currentDB)
+	}
+	if captured.Topology != "sentinel" {
+		t.Fatalf("expected sentinel topology to be preserved, got %q", captured.Topology)
+	}
+	if captured.RedisSentinelMaster != "mymaster" {
+		t.Fatalf("expected Sentinel master to be preserved, got %q", captured.RedisSentinelMaster)
+	}
+	if captured.RedisSentinelUser != "sentinel-user" || captured.RedisSentinelPassword != "sentinel-pass" {
+		t.Fatalf("expected Sentinel credentials to be preserved, got user=%q password=%q", captured.RedisSentinelUser, captured.RedisSentinelPassword)
+	}
+	if len(captured.Hosts) != 2 || captured.Hosts[0] != "sentinel-b.local:26379" || captured.Hosts[1] != "sentinel-c.local:26379" {
+		t.Fatalf("expected Sentinel hosts to be preserved, got %#v", captured.Hosts)
+	}
+	if !captured.UseSSL || captured.SSLMode != "required" {
+		t.Fatalf("expected TLS settings to be preserved, got useSSL=%v sslMode=%q", captured.UseSSL, captured.SSLMode)
+	}
+}
+
 func TestIsRedisKeyGone(t *testing.T) {
 	tests := []struct {
 		name    string