fix: incorrect header height calculation in estimated month height (#23923)

Author: midzelis

web/src/lib/managers/timeline-manager/internal/layout-support.svelte.ts

@@ -12,7 +12,7 @@ export function updateGeometry(timelineManager: TimelineManager, month: MonthGro
     if (!month.isHeightActual) {
       const unwrappedWidth = (3 / 2) * month.assetsCount * timelineManager.rowHeight * (7 / 10);
       const rows = Math.ceil(unwrappedWidth / viewportWidth);
-      const height = 51 + Math.max(1, rows) * timelineManager.rowHeight;
+      const height = timelineManager.headerHeight + Math.max(1, rows) * timelineManager.rowHeight;
       month.height = height;
     }
     return;

web/src/lib/managers/timeline-manager/timeline-manager.svelte.spec.ts

@@ -84,13 +84,13 @@ describe('TimelineManager', () => {
         expect.arrayContaining([
           expect.objectContaining({ year: 2024, month: 3, height: 283 }),
           expect.objectContaining({ year: 2024, month: 2, height: 7711 }),
-          expect.objectContaining({ year: 2024, month: 1, height: 286 }),
+          expect.objectContaining({ year: 2024, month: 1, height: 283 }),
         ]),
       );
     });
 
     it('calculates timeline height', () => {
-      expect(timelineManager.totalViewerHeight).toBe(8340);
+      expect(timelineManager.totalViewerHeight).toBe(8337);
     });
   });