🚀 feat(Channels): Enhance Channel Filtering & Performance

feat(api):
• Add optional `type` query param to `/api/channel` endpoint for type-specific pagination
• Return `type_counts` map with counts for each channel type
• Implement `GetChannelsByType`, `CountChannelsByType`, `CountChannelsGroupByType` in `model/channel.go`

feat(frontend):
• Introduce type Tabs in `ChannelsTable` to switch between channel types
• Tabs show dynamic counts using backend `type_counts`; “All” is computed from sum
• Persist active type, reload data on tab change (with proper query params)

perf(frontend):
• Use a request counter (`useRef`) to discard stale responses when tabs switch quickly
• Move all `useMemo` hooks to top level to satisfy React Hook rules
• Remove redundant local type counting fallback when backend data present

ui:
• Remove icons from response-time tags for cleaner look
• Use Semi-UI native arrow controls for Tabs; custom arrow code deleted

chore:
• Minor refactor & comments for clarity
• Ensure ESLint Hook rules pass

Result: Channel list now supports fast, accurate type filtering with correct counts, improved concurrency safety, and cleaner UI.

controller/channel.go

@@ -52,6 +52,14 @@ func GetAllChannels(c *gin.Context) {
 	channelData := make([]*model.Channel, 0)
 	idSort, _ := strconv.ParseBool(c.Query("id_sort"))
 	enableTagMode, _ := strconv.ParseBool(c.Query("tag_mode"))
+	// type filter
+	typeStr := c.Query("type")
+	typeFilter := -1
+	if typeStr != "" {
+		if t, err := strconv.Atoi(typeStr); err == nil {
+			typeFilter = t
+		}
+	}
 
 	var total int64
 
@@ -72,6 +80,14 @@ func GetAllChannels(c *gin.Context) {
 		}
 		// 计算 tag 总数用于分页
 		total, _ = model.CountAllTags()
+	} else if typeFilter >= 0 {
+		channels, err := model.GetChannelsByType((p-1)*pageSize, pageSize, idSort, typeFilter)
+		if err != nil {
+			c.JSON(http.StatusOK, gin.H{"success": false, "message": err.Error()})
+			return
+		}
+		channelData = channels
+		total, _ = model.CountChannelsByType(typeFilter)
 	} else {
 		channels, err := model.GetAllChannels((p-1)*pageSize, pageSize, false, idSort)
 		if err != nil {
@@ -82,14 +98,18 @@ func GetAllChannels(c *gin.Context) {
 		total, _ = model.CountAllChannels()
 	}
 
+	// calculate type counts
+	typeCounts, _ := model.CountChannelsGroupByType()
+
 	c.JSON(http.StatusOK, gin.H{
-		"success": true,
-		"message": "",
-		"data": gin.H{
-			"items":     channelData,
-			"total":     total,
-			"page":      p,
-			"page_size": pageSize,
+		"success":     true,
+		"message":     "",
+		"data":        gin.H{
+			"items":         channelData,
+			"total":         total,
+			"page":          p,
+			"page_size":     pageSize,
+			"type_counts":   typeCounts,
 		},
 	})
 	return