fix(client-config): Hy2 未启用时不下发 hy2-out(消除 urltest 死成员探测)

hy2_port 为空(当前默认,Hy2 证书未接)时,旧逻辑仍把 hy2-out 默认指向
REALITY 的 TCP 443 端口塞进 urltest 探测组,导致客户端持续探测一个无 Hy2
监听的死成员 → "connection reset by peer"。改为 hy2Enabled 才下发 hy2-out
并加入探测组;否则 outbounds/urltest 只含 reality-out。已校验下发配置。

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

server/internal/httpapi/clientconfig.go

@@ -30,11 +30,11 @@ func BuildClientConfig(node *nodes.NodeRow, dpUUID, deriveKey string) ([]byte, e
 
 	realityPublicKey := node.RealityPBK
 	realityShortID := node.RealityShortID
+	// Hysteria2 仅在节点确实配置了 hy2 端口时才下发。否则不出 hy2-out:
+	// 它会指向 REALITY 的 TCP 端口、而服务端又无 Hy2 监听,导致 urltest
+	// 一直探测一个死成员(connection reset by peer)。
+	hy2Enabled := node.Hy2Port.Valid && node.Hy2Port.Int32 > 0
 	hy2Password := dpcred.DeriveHy2Password(dpUUID, deriveKey)
-	hy2Port := int32(443) // default
-	if node.Hy2Port.Valid {
-		hy2Port = node.Hy2Port.Int32
-	}
 
 	// REALITY outbound (VLESS + REALITY TLS, TCP 443).
 	realityOut := map[string]any{
@@ -77,7 +77,7 @@ func BuildClientConfig(node *nodes.NodeRow, dpUUID, deriveKey string) ([]byte, e
 		"type":        "hysteria2",
 		"tag":         "hy2-out",
 		"server":      host,
-		"server_port": hy2Port,
+		"server_port": node.Hy2Port.Int32,
 		"password":    hy2Password,
 		"tls": map[string]any{
 			"enabled": true,
@@ -96,14 +96,22 @@ func BuildClientConfig(node *nodes.NodeRow, dpUUID, deriveKey string) ([]byte, e
 		"stack":        "system",
 	}
 
+	// 代理出站集合:REALITY 必有;Hy2 仅在启用时加入(否则不进配置/探测组)。
+	proxyTags := []string{"reality-out"}
+	proxyOutbounds := []any{realityOut}
+	if hy2Enabled {
+		proxyTags = append(proxyTags, "hy2-out")
+		proxyOutbounds = append(proxyOutbounds, hy2Out)
+	}
+
 	// urltest auto-select outbound.
 	autoBest := map[string]any{
-		"type":       "urltest",
-		"tag":        "auto",
-		"outbounds":  []string{"reality-out", "hy2-out"},
-		"url":        "https://www.gstatic.com/generate_204",
-		"interval":   "3m",
-		"tolerance":  50,
+		"type":      "urltest",
+		"tag":       "auto",
+		"outbounds": proxyTags,
+		"url":       "https://www.gstatic.com/generate_204",
+		"interval":  "3m",
+		"tolerance": 50,
 	}
 
 	// Route: LAN direct, everything else via auto.
@@ -137,13 +145,11 @@ func BuildClientConfig(node *nodes.NodeRow, dpUUID, deriveKey string) ([]byte, e
 	cfg := map[string]any{
 		"log": map[string]any{"level": "warn", "timestamp": true},
 		"inbounds": []any{tunIn},
-		"outbounds": []any{
-			realityOut,
-			hy2Out,
+		"outbounds": append(proxyOutbounds,
 			autoBest,
 			map[string]any{"type": "block", "tag": "block"},
 			map[string]any{"type": "direct", "tag": "direct"},
-		},
+		),
 		"route": route,
 		"dns":   dns,
 	}