feat: enhance Safew watcher initialization and token management

- Added functionality to list and start Safew tokens in the main server function, ensuring proper initialization of the Safew watcher.
- Introduced `ensureSafewWatcher` method in the ChannelHandler to manage Safew tokens during channel creation and updates.
- Implemented `StartTokens` method in the Watcher to handle multiple tokens efficiently.
- Enhanced error handling and logging for Safew watcher operations to improve observability.

internal/handler/channel.go

@@ -49,6 +49,7 @@ func (h *ChannelHandler) Create(c *gin.Context) {
 		c.JSON(http.StatusConflict, gin.H{"error": err.Error()})
 		return
 	}
+	h.ensureSafewWatcher(req.Type, req.Config)
 	c.JSON(http.StatusCreated, ch)
 }
 
@@ -91,6 +92,7 @@ func (h *ChannelHandler) Update(c *gin.Context) {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": err.Error()})
 		return
 	}
+	h.ensureSafewWatcher(req.Type, req.Config)
 	c.JSON(http.StatusOK, gin.H{"ok": true})
 }
 
@@ -160,6 +162,19 @@ func (h *ChannelHandler) respondSafewChats(c *gin.Context, token, q string) {
 	c.JSON(http.StatusOK, gin.H{"data": list, "total": len(list)})
 }
 
+func (h *ChannelHandler) ensureSafewWatcher(typ string, config json.RawMessage) {
+	if h.chats == nil || typ != "safew" {
+		return
+	}
+	raw := config
+	ch := &model.Channel{Type: typ, Config: &raw}
+	tok, err := safewTokenFromChannel(ch)
+	if err != nil {
+		return
+	}
+	h.chats.Ensure(tok)
+}
+
 func safewTokenFromChannel(ch *model.Channel) (string, error) {
 	if ch.Type != "safew" {
 		return "", fmt.Errorf("channel is not safew")