fix: correctly extract exception amount on fees page

app.py

@@ -51,10 +51,11 @@ def fees():
             
             # Check for exception
             norm_period = normalize(m)
-            override = exceptions.get((norm_name, norm_period))
+            ex_data = exceptions.get((norm_name, norm_period))
+            override_amount = ex_data["amount"] if ex_data else None
             
-            if override is not None and override != fee:
-                cell = f"{override} ({fee}) CZK ({count})" if count > 0 else f"{override} ({fee}) CZK"
+            if override_amount is not None and override_amount != fee:
+                cell = f"{override_amount} ({fee}) CZK ({count})" if count > 0 else f"{override_amount} ({fee}) CZK"
                 is_overridden = True
             else:
                 cell = f"{fee} CZK ({count})" if count > 0 else "-"