fix: goimports — strip unused imports from all server files

internal/server/dashboard.go

@@ -1,18 +1,14 @@
 package server
 
 import (
-	"database/sql"
 	"fmt"
 	"net/http"
 	"strings"
-	"time"
 
-	"log/slog"
+	"gophergate/internal/db"
 
 	"github.com/gin-gonic/gin"
 	"golang.org/x/crypto/bcrypt"
-	"gophergate/internal/db"
-	"gophergate/internal/utils"
 )
 
 type ApiResponse struct {
@@ -166,4 +162,3 @@ func (s *Server) handleLogout(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, SuccessResponse(gin.H{"message": "Logged out"}))
 }
-