Fix tuple index out of range in format_html for statistics

lmsege/lms/admin.py

@@ -133,6 +133,7 @@ class SubmissionAdmin(ModelAdmin):
             earned = float(parts[0].strip())
             total = float(parts[1].strip())
             percentage = (earned / total) * 100 if total > 0 else 0
+            percentage_str = f"{percentage:.1f}"
             
             is_passed = percentage >= 40
             threshold_text = "Выше порога" if is_passed else "Ниже порога (Мин: 40%)"
@@ -156,11 +157,11 @@ class SubmissionAdmin(ModelAdmin):
                         </div>
                         <div style="flex-grow: 1; max-width: 50%; display: flex; flex-direction: column; justify-content: flex-end;">
                             <div style="display: flex; justify-content: space-between; font-size: 12px; margin-bottom: 8px;">
-                                <span style="color: #c9d1d9;">Выполнение: <b>{percentage:.1f}%</b></span>
+                                <span style="color: #c9d1d9;">Выполнение: <b>{percentage_str}%</b></span>
                                 <span style="color: {color}; font-weight: 500;">{threshold_text}</span>
                             </div>
                             <div style="width: 100%; background-color: #30363d; border-radius: 9999px; height: 6px; overflow: hidden; margin-bottom: 8px;">
-                                <div style="background-color: {color}; width: {percentage}%; height: 100%; border-radius: 9999px;"></div>
+                                <div style="background-color: {color}; width: {percentage_str}%; height: 100%; border-radius: 9999px;"></div>
                             </div>
                             <div style="display: flex; justify-content: space-between; font-size: 11px; color: #8b949e; font-family: ui-monospace, SFMono-Regular, monospace;">
                                 <span>0 б</span>
@@ -172,14 +173,18 @@ class SubmissionAdmin(ModelAdmin):
                 </div>
                 ''',
                 grade=obj.grade,
-                percentage=percentage,
+                percentage_str=percentage_str,
                 threshold_text=threshold_text,
                 color=color,
                 total_int=total_int,
                 threshold_points=threshold_points
             )
-        except Exception:
-            return format_html('<div style="color: #f85149;">Оценка имеет неверный формат. Используйте формат "X/Y" (например, "3/27").</div>')
+        except Exception as e:
+            return format_html(
+                '<div style="color: #f85149;">Оценка имеет неверный формат. Ошибка: {error}<br>Значение: "{val}"</div>', 
+                error=str(e), 
+                val=obj.grade
+            )
 
     def get_queryset(self, request):
         qs = super().get_queryset(request)