fix: simplify date-only due labels

frontend/src/lib/task-due.test.ts

@@ -66,15 +66,15 @@ describe('getTaskDuePresentation date-only tasks', () => {
   })
 
   it.each([
-    ['2026-09-09', '9月9日', '已过期1天', 'overdue'],
-    ['2026-09-10', '9月10日', '今天', 'neutral'],
-    ['2026-09-11', '9月11日', '还有1天', 'neutral'],
-    ['2027-01-02', '2027年1月2日', '还有114天', 'neutral'],
-  ] as const)('formats %s by local calendar day', (dueAt, absoluteText, relativeText, state) => {
+    ['2026-09-08', '2天', 'overdue', '已过期2天'],
+    ['2026-09-10', '今天', 'neutral', '今天'],
+    ['2026-09-12', '2天', 'neutral', '还有2天'],
+  ] as const)('uses compact visual copy for %s while preserving the full description', (dueAt, relativeText, state, fullRelativeText) => {
     const result = getTaskDuePresentation({ dueAt, dueHasTime: false, completed: false, nowMs })
-    expect(result).toMatchObject({ datetime: dueAt, absoluteText, relativeText, state })
-    expect(result?.fullText).toContain('截止日期：')
-    expect(result?.fullText).toContain('2026年' === absoluteText.slice(0, 5) ? absoluteText : dueAt.startsWith('2026') ? `2026年${absoluteText}` : absoluteText)
+    expect(result).toMatchObject({ datetime: dueAt, relativeText, state })
+    expect(result?.relativeText).not.toMatch(/还有|已过期|月|日/)
+    expect(result?.fullText).toContain(`截止日期：2026年${Number(dueAt.slice(5, 7))}月${Number(dueAt.slice(8, 10))}日`)
+    expect(result?.fullText).toContain(fullRelativeText)
   })
 
   it('compares calendar dates across a DST-sized 23 hour gap', () => {
@@ -86,18 +86,18 @@ describe('getTaskDuePresentation date-only tasks', () => {
       completed: false,
       nowMs: before.getTime(),
     })
-    expect(result?.relativeText).toBe('还有1天')
+    expect(result?.relativeText).toBe('1天')
+    expect(result?.fullText).toContain('还有1天')
   })
 
   it.each([
     ['2026-09-09', '已完成（原定1天前）'],
     ['2026-09-10', '已完成（原定今天）'],
     ['2026-09-12', '已完成（原定2天后）'],
-  ])('uses completed neutral wording for %s', (dueAt, relativeText) => {
-    expect(getTaskDuePresentation({ dueAt, dueHasTime: false, completed: true, nowMs })).toMatchObject({
-      relativeText,
-      state: 'completed',
-    })
+  ])('uses minimal completed visual copy and preserves the detailed description for %s', (dueAt, fullRelativeText) => {
+    const result = getTaskDuePresentation({ dueAt, dueHasTime: false, completed: true, nowMs })
+    expect(result).toMatchObject({ relativeText: '已完成', state: 'completed' })
+    expect(result?.fullText).toContain(fullRelativeText)
   })
 })
 

frontend/src/lib/task-due.ts

@@ -161,13 +161,15 @@ export function getTaskDuePresentation(input: {
   const dayDelta = calendarDelta(parsed.date, now)
   const absoluteDateText = absoluteDate(parsed.date, now.getFullYear())
   const absoluteText = input.dueHasTime ? `${absoluteDateText} ${localTime(parsed.date)}` : absoluteDateText
+  const completedDescription = completedRelative(dayDelta)
+  const dateOnlyDescription = dayDelta === 0
+    ? '今天'
+    : dayDelta > 0 ? `还有${dayDelta}天` : `已过期${Math.abs(dayDelta)}天`
   const relativeText = input.completed
-    ? completedRelative(dayDelta)
+    ? (input.dueHasTime ? completedDescription : '已完成')
     : input.dueHasTime
       ? timedRelative(parsed.date.getTime() - input.nowMs)
-      : dayDelta === 0
-        ? '今天'
-        : dayDelta > 0 ? `还有${dayDelta}天` : `已过期${Math.abs(dayDelta)}天`
+      : dayDelta === 0 ? '今天' : `${Math.abs(dayDelta)}天`
   const state: TaskDueState = input.completed
     ? 'completed'
     : input.dueHasTime ? (parsed.date.getTime() < input.nowMs ? 'overdue' : 'neutral') : (dayDelta < 0 ? 'overdue' : 'neutral')
@@ -178,7 +180,7 @@ export function getTaskDuePresentation(input: {
     datetime: parsed.datetime,
     absoluteText,
     relativeText,
-    fullText: `${kind}：${fullAbsolute}，${relativeText}`,
+    fullText: `${kind}：${fullAbsolute}，${input.completed ? completedDescription : input.dueHasTime ? relativeText : dateOnlyDescription}`,
     state,
   }
 }