refactor: unify task and habit list rows

frontend/e2e/task-row-rhythm.spec.ts

@@ -32,8 +32,8 @@ async function expectTaskRowGeometry(row: Locator) {
       directChildrenInside,
     }
   })
-  expect(metrics.height).toBeGreaterThanOrEqual(64)
-  expect(metrics.height).toBeLessThanOrEqual(68)
+  expect(metrics.height).toBeGreaterThanOrEqual(57)
+  expect(metrics.height).toBeLessThanOrEqual(59)
   expect(metrics.scrollWidth).toBeLessThanOrEqual(metrics.clientWidth)
   expect(metrics.tailInside).toBe(true)
   expect(metrics.directChildrenInside).toBe(true)
@@ -70,9 +70,14 @@ test('task rows keep approved rhythm without clipping across desktop and mobile'
   const dueTitle = `含截止日期-${suffix}`
   const parentTitle = `含子任务-${suffix}`
   const localDate = (offset: number) => {
-    const date = new Date()
-    date.setDate(date.getDate() + offset)
-    return `${date.getFullYear()}-${String(date.getMonth() + 1).padStart(2, '0')}-${String(date.getDate()).padStart(2, '0')}`
+    const shanghaiDate = new Intl.DateTimeFormat('en-CA', {
+      timeZone: 'Asia/Shanghai', year: 'numeric', month: '2-digit', day: '2-digit',
+    }).format(new Date())
+    const date = new Date(`${shanghaiDate}T12:00:00+08:00`)
+    date.setUTCDate(date.getUTCDate() + offset)
+    return new Intl.DateTimeFormat('en-CA', {
+      timeZone: 'Asia/Shanghai', year: 'numeric', month: '2-digit', day: '2-digit',
+    }).format(date)
   }
   await create(ordinaryTitle)
   await create(completedTitle)