fix: goimports — strip unused imports from all server files

internal/server/clients.go

@@ -2,14 +2,13 @@ package server
 
 import (
 	"database/sql"
-	"fmt"
 	"net/http"
-	"strings"
 	"time"
 
+	"gophergate/internal/db"
+
 	"github.com/gin-gonic/gin"
 	"github.com/google/uuid"
-	"gophergate/internal/db"
 )
 
 func (s *Server) handleGetClients(c *gin.Context) {
@@ -272,4 +271,3 @@ func (s *Server) handleDeleteClientToken(c *gin.Context) {
 
 	c.JSON(http.StatusOK, SuccessResponse(gin.H{"message": "Token revoked"}))
 }
-