Entire logging rework. Full error handling. Small improvements.

auth.go

@@ -30,7 +30,7 @@ func getUserPassword(username string) (string, error) {
 
 	if err := models.DB.Where("username = ?", username).First(&user).Error; err != nil {
 		if !errors.Is(err, gorm.ErrRecordNotFound) {
-			utils.Logger.Fatal(err)
+			utils.Logger.Fatalf("[AUTH] Failed to get password for user %s: %s", username, err)
 		}
 		return "", err
 	}
@@ -90,7 +90,7 @@ func AdminAuthRequired() gin.HandlerFunc {
 
 func redirectToLogin(c *gin.Context) {
 	if err := session.InvalidateSession(c); err != nil {
-		utils.Logger.Fatal(err)
+		utils.Logger.Fatalf("[AUTH] Failed to invalidate session: %s", err)
 	}
 	c.Redirect(http.StatusFound, "/login")
 	c.Abort()