fix: stabilize library paths and subscription matching

internal/handler/subscription_logging.go

@@ -0,0 +1,54 @@
+package handler
+
+import (
+	"net/url"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+	"go.uber.org/zap"
+
+	"github.com/ShukeBta/MediaStationGo/internal/middleware"
+	"github.com/ShukeBta/MediaStationGo/internal/service"
+)
+
+func subscriptionRequestUserID(c *gin.Context) string {
+	if c == nil {
+		return ""
+	}
+	if uid, ok := c.Get(middleware.CtxUserID); ok {
+		if userID, ok := uid.(string); ok {
+			return userID
+		}
+	}
+	return ""
+}
+
+func subscriptionFeedKind(feedURL string) string {
+	raw := strings.TrimSpace(feedURL)
+	if raw == "" {
+		return "empty"
+	}
+	lower := strings.ToLower(raw)
+	if strings.HasPrefix(lower, "site-search://") {
+		return "site-search"
+	}
+	parsed, err := url.Parse(raw)
+	if err == nil && parsed.Scheme != "" {
+		return parsed.Scheme
+	}
+	return "unknown"
+}
+
+func logSubscriptionInfo(svc *service.Container, msg string, fields ...zap.Field) {
+	if svc == nil || svc.Log == nil {
+		return
+	}
+	svc.Log.Info(msg, fields...)
+}
+
+func logSubscriptionWarn(svc *service.Container, msg string, fields ...zap.Field) {
+	if svc == nil || svc.Log == nil {
+		return
+	}
+	svc.Log.Warn(msg, fields...)
+}