fix: add can_view_cloud_data to login and profile API responses

- Add can_view_cloud_data field to auth login response
- Add can_view_cloud_data field to agent profile response
- Fetch latest user permissions from /agent/profile on agent layout mount
- Update localStorage with latest can_view_cloud_data value

backend/internal/router/agent/agent.go

@@ -614,12 +614,13 @@ func handleGetProfile(c *gin.Context) {
 	}
 
 	response.Success(c, gin.H{
-		"id":              user.ID,
-		"username":        user.Username,
-		"email":           user.Email,
-		"avatar":          user.Avatar,
-		"balance":         user.Balance,
-		"can_create_agent": user.CanCreateAgent,
+		"id":                  user.ID,
+		"username":            user.Username,
+		"email":               user.Email,
+		"avatar":              user.Avatar,
+		"balance":             user.Balance,
+		"can_create_agent":    user.CanCreateAgent,
+		"can_view_cloud_data": user.CanViewCloudData,
 	})
 }