fix: login session IP parsing and username lookup

internal/handler/auth.go

@@ -3,12 +3,15 @@ package handler
 import (
 	"encoding/json"
 	"errors"
+	"log"
 	"net/http"
+	"strings"
 	"time"
 
 	"github.com/panelhosting/panel/internal/auth"
 	"github.com/panelhosting/panel/internal/authsvc"
 	"github.com/panelhosting/panel/internal/config"
+	"github.com/panelhosting/panel/internal/httputil"
 	"github.com/panelhosting/panel/internal/middleware"
 )
 
@@ -34,9 +37,9 @@ func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
 	}
 
 	result, err := h.svc.Login(r.Context(), authsvc.LoginInput{
-		Username:  req.Username,
+		Username:  strings.TrimSpace(req.Username),
 		Password:  req.Password,
-		IP:        r.RemoteAddr,
+		IP:        httputil.ClientIP(r),
 		UserAgent: r.UserAgent(),
 	})
 	if err != nil {
@@ -44,6 +47,7 @@ func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
 			writeError(w, http.StatusUnauthorized, "invalid credentials")
 			return
 		}
+		log.Printf("login error: %v", err)
 		writeError(w, http.StatusInternalServerError, "login failed")
 		return
 	}

internal/httputil/ip.go

@@ -0,0 +1,30 @@
+package httputil
+
+import (
+	"net"
+	"net/http"
+	"strings"
+)
+
+func ClientIP(r *http.Request) string {
+	if xff := r.Header.Get("X-Forwarded-For"); xff != "" {
+		if ip := strings.TrimSpace(strings.Split(xff, ",")[0]); ip != "" {
+			return ip
+		}
+	}
+	if xri := strings.TrimSpace(r.Header.Get("X-Real-IP")); xri != "" {
+		return xri
+	}
+	if host, _, err := net.SplitHostPort(r.RemoteAddr); err == nil {
+		return host
+	}
+	return r.RemoteAddr
+}
+
+func ValidIP(ip string) (string, bool) {
+	parsed := net.ParseIP(strings.TrimSpace(ip))
+	if parsed == nil {
+		return "", false
+	}
+	return parsed.String(), true
+}

internal/repository/session.go

@@ -8,6 +8,7 @@ import (
 
 	"github.com/jackc/pgx/v5"
 	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/panelhosting/panel/internal/httputil"
 	"github.com/panelhosting/panel/internal/models"
 )
 
@@ -16,7 +17,7 @@ var ErrUserNotFound = errors.New("user not found")
 func (r *UserRepository) GetByUsername(ctx context.Context, username string) (*models.User, error) {
 	const q = `
 		SELECT id, uuid, email, username, password_hash, role, status, locale, timezone, last_login_at, created_at, updated_at
-		FROM users WHERE username = $1
+		FROM users WHERE LOWER(username) = LOWER($1)
 	`
 	var u models.User
 	err := r.pool.QueryRow(ctx, q, username).Scan(
@@ -65,11 +66,16 @@ func NewSessionRepository(pool *pgxpool.Pool) *SessionRepository {
 }
 
 func (r *SessionRepository) Create(ctx context.Context, userID int64, tokenHash string, ip, userAgent string, expiresAt time.Time) error {
+	var ipArg any
+	if normalized, ok := httputil.ValidIP(ip); ok {
+		ipArg = normalized
+	}
+
 	const q = `
 		INSERT INTO sessions (user_id, token_hash, ip_address, user_agent, expires_at)
-		VALUES ($1, $2, NULLIF($3, '')::inet, NULLIF($4, ''), $5)
+		VALUES ($1, $2, $3, NULLIF($4, ''), $5)
 	`
-	_, err := r.pool.Exec(ctx, q, userID, tokenHash, ip, userAgent, expiresAt)
+	_, err := r.pool.Exec(ctx, q, userID, tokenHash, ipArg, userAgent, expiresAt)
 	if err != nil {
 		return fmt.Errorf("create session: %w", err)
 	}