diff --git a/frontend-vue/tests/progress-response-cache.test.ts b/frontend-vue/tests/progress-response-cache.test.ts
index 2e1b8915..5e01eb23 100644
--- a/frontend-vue/tests/progress-response-cache.test.ts
+++ b/frontend-vue/tests/progress-response-cache.test.ts
@@ -207,3 +207,116 @@ test('test_task_082_progress_cleanup_dependency_failure_releases_resources', ()
   cache.clear()
   assert.equal(cache.size, 0)
 })
+
+test('test_cache_get_hit', () => {
+  const c = clock()
+  const cache = createProgressResponseCache<FakeDetail>({ ttlMs: 5000, maxEntries: 10, now: c.now })
+  cache.set(1, detail(1))
+  assert.deepEqual(cache.get(1), detail(1), 'TTL 内命中返回原值')
+  assert.equal(cache.has(1), true)
+})
+
+test('test_cache_get_expired_cleared', () => {
+  const c = clock()
+  const cache = createProgressResponseCache<FakeDetail>({ ttlMs: 5000, maxEntries: 10, now: c.now })
+  cache.set(1, detail(1))
+  c.tick(4999)
+  assert.deepEqual(cache.get(1), detail(1), '恰好未过期仍命中')
+  c.tick(2)
+  assert.equal(cache.get(1), undefined, '过期后读取返回 undefined 并清理')
+  assert.equal(cache.size, 0, '过期条目已从缓存移除')
+})
+
+test('test_cache_max_entries_evict', () => {
+  const c = clock()
+  const cache = createProgressResponseCache<FakeDetail>({ ttlMs: 60000, maxEntries: 2, now: c.now })
+  cache.set(1, detail(1))
+  cache.set(2, detail(2))
+  cache.set(3, detail(3))
+  assert.equal(cache.size, 2)
+  assert.equal(cache.get(1), undefined, '溢出淘汰最旧条目')
+  assert.equal(cache.get(3)?.id, 3, '最新条目保留')
+})
+
+test('test_cache_empty_get_undefined', () => {
+  const c = clock()
+  const cache = createProgressResponseCache<FakeDetail>({ ttlMs: 1000, maxEntries: 5, now: c.now })
+  assert.equal(cache.get(1), undefined, '空缓存 get 返回 undefined')
+  assert.equal(cache.has(1), false)
+  assert.deepEqual(cache.entries(), [])
+})
+
+test('test_cache_set_overwrites', () => {
+  const c = clock()
+  const cache = createProgressResponseCache<FakeDetail>({ ttlMs: 60000, maxEntries: 5, now: c.now })
+  cache.set(1, detail(1))
+  c.tick(100)
+  cache.set(1, { ...detail(1), status: 'SUCCESS' })
+  assert.equal(cache.get(1)?.status, 'SUCCESS', '同 key 覆盖新值')
+  assert.equal(cache.size, 1)
+  // 覆盖刷新 TTL：覆盖后再过一半 TTL 仍命中
+  c.tick(30000)
+  assert.deepEqual(cache.get(1), { ...detail(1), status: 'SUCCESS' }, '覆盖后 TTL 重新计时')
+})
+
+test('test_cache_ttl_zero', () => {
+  const c = clock()
+  const cache = createProgressResponseCache<FakeDetail>({ ttlMs: 1, maxEntries: 5, now: c.now })
+  cache.set(1, detail(1))
+  c.tick(1)
+  assert.equal(cache.get(1), undefined, 'TTL=1ms 过 1ms 即过期')
+  assert.equal(cache.size, 0)
+})
+
+test('test_cache_lazy_cleanup', () => {
+  const c = clock()
+  const cache = createProgressResponseCache<FakeDetail>({ ttlMs: 1000, maxEntries: 5, now: c.now })
+  cache.set(1, detail(1))
+  cache.set(2, detail(2))
+  c.tick(2000)
+  // 未读取前缓存条目仍在（惰性：无后台定时清理）
+  assert.equal(cache.size, 2)
+  // 读取触发惰性清理：读 1 只清 1，读 2 再清 2
+  assert.equal(cache.get(1), undefined)
+  assert.equal(cache.size, 1)
+  assert.equal(cache.get(2), undefined)
+  assert.equal(cache.size, 0)
+})
+
+test('test_cache_after_polling_cycle', async () => {
+  const c = clock()
+  const cache = createProgressResponseCache<{ taskId?: number; status?: string }>({
+    ttlMs: 5000,
+    maxEntries: 10,
+    now: c.now,
+  })
+  const storage = new Map<string, string>()
+  ;(globalThis as Record<string, unknown>).window = {
+    localStorage: {
+      getItem: (k: string) => storage.get(k) ?? null,
+      setItem: (k: string, v: string) => { storage.set(k, v) },
+      removeItem: (k: string) => { storage.delete(k) },
+    },
+    setTimeout: (fn: () => void, ms: number) => globalThis.setTimeout(fn, ms),
+    clearTimeout: (id: unknown) => globalThis.clearTimeout(id as number),
+    setInterval: (fn: () => void, ms: number) => globalThis.setInterval(fn, ms),
+    clearInterval: (id: unknown) => globalThis.clearInterval(id as number),
+  }
+  const { useTaskProgressLoop } = await import('../src/shared/composables/useTaskProgressLoop.ts')
+  const loop = useTaskProgressLoop<{ taskId?: number; status?: string }>({
+    scope: 'cache-cycle',
+    fetchProgress: async (ids) => ({
+      items: ids.map((id) => ({ taskId: id, status: 'RUNNING' })),
+    }),
+    extractTaskId: (d) => d?.taskId,
+    extractStatus: (d) => d?.status,
+    getIntervalMs: () => 60000,
+    progressCache: cache,
+  })
+  loop.reset([1])
+  await new Promise<void>((r) => globalThis.setTimeout(r, 10))
+  assert.equal(cache.get(1)?.status, 'RUNNING', '轮询周期内缓存可用')
+  c.tick(6000)
+  assert.equal(cache.get(1), undefined, '超 TTL 后读取清理')
+  loop.dispose()
+})