feat: enforce youth mode policy and improve search

server/im_http.go

@@ -1997,7 +1997,7 @@ func serveIMAppReleaseLatest(wrt http.ResponseWriter, req *http.Request) {
 	if channel == "" {
 		channel = "stable"
 	}
-	if platform != "ios" && platform != "android" {
+	if platform != "ios" && platform != "android" && platform != "web" {
 		writeIMError(wrt, req, http.StatusBadRequest, 30000, imReasonMalformedRequest, "malformed request", map[string]any{"field": "platform"})
 		return
 	}
@@ -8169,13 +8169,13 @@ func youthModeRestrictionItems(restrictions []string) []map[string]any {
 			"code":        "night_quiet",
 			"title":       "深夜免打扰",
 			"description": "夜间减少消息提醒打扰，帮助用户保持健康作息。",
-			"enforced":    false,
+			"enforced":    true,
 		},
 		"content_filter": {
 			"code":        "content_filter",
 			"title":       "内容过滤",
 			"description": "对不适合青少年的内容进行识别和限制展示。",
-			"enforced":    false,
+			"enforced":    true,
 		},
 		"payment_guard": {
 			"code":        "payment_guard",