test: 新增 parseDate 单元测试（iOS 兼容回归保障）

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

cfc-frontend/__tests__/utils/format.test.js

@@ -86,4 +86,78 @@ describe('format.js', () => {
       expect(format.formatScore(undefined)).toBe('--')
     })
   })
+
+  // --------------- parseDate ---------------
+
+  describe('parseDate', () => {
+    // 断言使用本地时间字段（getFullYear/getMonth/getDate/...），
+    // 避免 Node（V8）对纯日期字符串按 UTC 解析带来的时区差异。
+    const ymd = (d) => {
+      return d.getFullYear() + '-' + (d.getMonth() + 1) + '-' + d.getDate()
+    }
+
+    test('parses MySQL DATETIME with space separator "yyyy-MM-dd HH:mm"', () => {
+      // iOS 原生 new Date() 无法解析空格分隔格式，parseDate 必须归一化成功
+      const d = format.parseDate('2026-08-22 14:00')
+      expect(d).not.toBeNull()
+      expect(ymd(d)).toBe('2026-8-22')
+      expect(d.getHours()).toBe(14)
+      expect(d.getMinutes()).toBe(0)
+    })
+
+    test('parses MySQL DATETIME with seconds', () => {
+      const d = format.parseDate('2026-08-22 14:00:30')
+      expect(d).not.toBeNull()
+      expect(ymd(d)).toBe('2026-8-22')
+      expect(d.getSeconds()).toBe(30)
+    })
+
+    test('parses Java "EEE MMM dd HH:mm:ss zzz yyyy" (CST) format', () => {
+      // 后端 Java 常见格式，iOS 原生无法解析
+      const d = format.parseDate('Sat Aug 22 14:00:00 CST 2026')
+      expect(d).not.toBeNull()
+      expect(ymd(d)).toBe('2026-8-22')
+      expect(d.getHours()).toBe(14)
+    })
+
+    test('parses slash-separated "yyyy/MM/dd"', () => {
+      const d = format.parseDate('2026/08/22')
+      expect(d).not.toBeNull()
+      expect(ymd(d)).toBe('2026-8-22')
+    })
+
+    test('parses ISO 8601 "yyyy-MM-ddTHH:mm:ss"', () => {
+      const d = format.parseDate('2026-08-22T14:00:00')
+      expect(d).not.toBeNull()
+      expect(ymd(d)).toBe('2026-8-22')
+    })
+
+    test('parses plain date "yyyy-MM-dd"', () => {
+      const d = format.parseDate('2026-08-22')
+      expect(d).not.toBeNull()
+      expect(ymd(d)).toBe('2026-8-22')
+    })
+
+    test('parses numeric timestamp', () => {
+      const d = format.parseDate(1780000000000)
+      expect(d).not.toBeNull()
+      expect(d.getTime()).toBe(1780000000000)
+    })
+
+    test('returns same Date object when given a Date', () => {
+      const date = new Date()
+      expect(format.parseDate(date)).toBe(date)
+    })
+
+    test('returns null for null/undefined/empty string', () => {
+      expect(format.parseDate(null)).toBeNull()
+      expect(format.parseDate(undefined)).toBeNull()
+      expect(format.parseDate('')).toBeNull()
+    })
+
+    test('returns null for unparseable string', () => {
+      expect(format.parseDate('not-a-date')).toBeNull()
+      expect(format.parseDate('2026-13-45')).toBeNull()
+    })
+  })
 })