refactor: 重构提醒通知系统

apps/lib/features/calendar/presentation/dayweek/day_event_layout_engine.dart

@@ -106,12 +106,20 @@ class DayEventLayoutEngine {
       final clusterColumnCount =
           cluster.map((item) => item.column).reduce((a, b) => a > b ? a : b) +
           1;
-      final totalGap = (clusterColumnCount - 1) * columnGap;
-      final columnWidth = clusterColumnCount > 0
-          ? ((eventAreaWidth - totalGap) / clusterColumnCount).toDouble()
+      final maxVisibleColumns =
+          ((eventAreaWidth + columnGap) /
+                  (DayTimelineMetrics.minEventCardWidth + columnGap))
+              .floor()
+              .clamp(1, clusterColumnCount);
+      final totalGap = (maxVisibleColumns - 1) * columnGap;
+      final columnWidth = maxVisibleColumns > 0
+          ? (eventAreaWidth - totalGap) / maxVisibleColumns
           : eventAreaWidth;
 
       for (final item in cluster) {
+        if (item.column >= maxVisibleColumns) {
+          continue;
+        }
         final top = scale.pixelsForMinutes(item.startMinutes);
         final geometryHeight = scale.pixelsForMinutes(
           item.endMinutes - item.startMinutes,
@@ -125,7 +133,7 @@ class DayEventLayoutEngine {
             startMinutes: item.startMinutes,
             endMinutes: item.endMinutes,
             column: item.column,
-            columnCount: clusterColumnCount,
+            columnCount: maxVisibleColumns,
             top: top,
             geometryHeight: geometryHeight,
             visualHeight: visualHeight,

apps/lib/features/calendar/presentation/dayweek/day_timeline_metrics.dart

@@ -9,6 +9,7 @@ class DayTimelineMetrics {
   static const double timeLabelGap = 8;
   static const double eventRightInset = 4;
   static const double eventColumnGap = 4;
+  static const double minEventCardWidth = 30;
 
   static double timelineHeight(DayViewScale scale) {
     return scale.pixelsForMinutes(minutesInDay);
@@ -20,10 +21,10 @@ class DayTimelineMetrics {
 
   static double eventAreaWidth(double boardWidth) {
     final width = boardWidth - eventAreaLeft() - eventRightInset;
-    return width > 0 ? width : 0;
+    return width < 0 ? 0 : width;
   }
 
   static int clampMinuteOfDay(int minute) {
-    return minute.clamp(0, minutesInDay).toInt();
+    return minute.clamp(0, minutesInDay);
   }
 }