zmiana month na m i poprawka w kolorach paginaci

app.py

@@ -1267,17 +1267,38 @@ def favicon():
 @app.route("/")
 def main_page():
     now = datetime.now(timezone.utc)
-    month_str = request.args.get("month") or now.strftime("%Y-%m")
+
+    month_param = request.args.get("month", None)  # surowy parametr z URL
     start = end = None
 
-    if month_str:
+    if month_param in (None, ""):
+        # brak wyboru -> domyślnie aktualny miesiąc
+        month_str = now.strftime("%Y-%m")
+        start = datetime(now.year, now.month, 1, tzinfo=timezone.utc)
+        end = (start + timedelta(days=31)).replace(day=1)
+
+    elif month_param == "all":
+        month_str = "all"
+        start = end = None
+
+    else:
+        month_str = month_param
         try:
             year, month = map(int, month_str.split("-"))
             start = datetime(year, month, 1, tzinfo=timezone.utc)
             end = (start + timedelta(days=31)).replace(day=1)
-        except:
+        except ValueError:
             start = end = None
 
+    # dalej normalnie używasz date_filter:
+    def date_filter(query):
+        if start and end:
+            query = query.filter(
+                ShoppingList.created_at >= start,
+                ShoppingList.created_at < end
+            )
+        return query
+
     def date_filter(query):
         if start and end:
             query = query.filter(