Initial commit

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

app/router/client_headers.go

@@ -0,0 +1,16 @@
+package router
+
+import (
+	"videoweb/pub/common/useragent"
+
+	"github.com/gin-gonic/gin"
+)
+
+// applyClientForwardHeaders 向上游透传客户端 IP / UA（与 API 上游一致）：
+// X-Real-IP、User-Agent、X-User-Agent。
+func applyClientForwardHeaders(header map[string]string, c *gin.Context) {
+	if header == nil {
+		return
+	}
+	useragent.ApplyToHeader(header, c, useragent.DefaultVer)
+}