Add configurable news research backfill and coverage reporting

Allow selecting a historical start time and checking unfinished news before enabling analysis. Report enrolled work outside the selected range and use the active server boundary while retaining paused drafts. Cover date validation, queue carryover, task completion and cross-tab responses.

web/tests/workspaces.test.ts

@@ -485,7 +485,7 @@ test("新闻列表只更新可见条目的匹配版本评级，保留滚动与
 
 function researchPage(api: Record<string, unknown> = {}, user = vue.reactive({ sessionVersion: 1 }), extra: Record<string, unknown> = {}, dependencies: Record<string, unknown> = {}) {
   const load = moduleLoader({
-    "@@/apis/news-research": { getSettingsApi: async () => ({ config: {}, enabled: false }), listEventsApi: async () => ({ items: [], total: 0 }), listPackagesApi: async () => ({ items: [], total: 0 }), ...api },
+    "@@/apis/news-research": { getSettingsApi: async () => ({ config: {}, enabled: false, start_at: "2026-10-31T16:00:00Z" }), getCoverageApi: async (start_at: string) => ({ start_at, total: 0 }), listEventsApi: async () => ({ items: [], total: 0 }), listPackagesApi: async () => ({ items: [], total: 0 }), ...api },
     "@@/apis/skills": { listSkillTreeApi: async () => [] },
     "@@/apis/settings": { listProvidersApi: async () => [], listProviderModelsApi: async () => [] },
     "@/pinia/stores/user": { useUserStore: () => user },
@@ -494,6 +494,136 @@ function researchPage(api: Record<string, unknown> = {}, user = vue.reactive({ s
   return load("@/pages/home/index.vue").default.setup({}, { expose() {} })
 }
 
+test("回补时间按时区提交，刷新保留未提交的起点，核查不启用 AI", async () => {
+  const checked: string[] = []
+  const enabled: string[] = []
+  const page = researchPage({
+    getCoverageApi: async (start_at: string) => {
+      checked.push(start_at)
+      return { start_at, total: 10, missing: 4 }
+    },
+    enableApi: async (start_at: string) => {
+      enabled.push(start_at)
+      return { start_at, total: 10 }
+    }
+  })
+  await page.load()
+  assert.equal(page.startAt.value.toISOString(), "2026-10-31T16:00:00.000Z")
+  page.startAt.value = new Date("2026-10-01T00:00:00+08:00")
+  await page.load()
+  assert.equal(page.startAt.value.toISOString(), "2026-09-30T16:00:00.000Z")
+  assert.equal(checked.at(-1), "2026-09-30T16:00:00.000Z")
+  assert.equal(enabled.length, 0)
+  assert.equal(page.coverage.value.missing, 4)
+  await page.enable()
+  assert.deepEqual(enabled, ["2026-09-30T16:00:00.000Z"])
+})
+
+test("其他标签页启用后按实际起点核查，暂停后恢复草稿并丢弃旧范围响应", async () => {
+  let server = { config: {}, enabled: false, start_at: "2026-10-31T16:00:00Z" }
+  const pending = Promise.withResolvers()
+  const checked: string[] = []
+  let delayDraft = true
+  const draft = "2026-10-01T00:00:00.000Z"
+  const actual = "2026-11-05T00:00:00.000Z"
+  const page = researchPage({
+    getSettingsApi: async () => ({ ...server }),
+    getCoverageApi: async (start_at: string) => {
+      checked.push(start_at)
+      if (start_at === draft && delayDraft) {
+        delayDraft = false
+        return pending.promise
+      }
+      return { start_at, total: 5 }
+    }
+  })
+  await page.load()
+  page.selectedStartAt.value = new Date(draft)
+  const old = page.checkCoverage()
+  server = { ...server, enabled: true, start_at: actual }
+  await page.load()
+  assert.equal(page.enabled.value, true)
+  assert.equal(page.selectedStartAt.value.toISOString(), actual)
+  assert.equal(page.coverage.value.start_at, actual)
+  assert.equal(page.startAt.value.toISOString(), draft)
+  pending.resolve({ start_at: draft, total: 999 })
+  await old
+  assert.equal(page.coverage.value.start_at, actual)
+  assert.equal(page.coverage.value.total, 5)
+  server.enabled = false
+  await page.load()
+  assert.equal(page.selectedStartAt.value.toISOString(), draft)
+  assert.equal(page.coverage.value.start_at, draft)
+  assert.equal(page.savedStartAt.value.toISOString(), actual)
+  assert.deepEqual(checked, ["2026-10-31T16:00:00.000Z", draft, actual, draft])
+})
+
+test("回补核查丢弃旧时间、旧会话及卸载后的结果，失败可重试", async () => {
+  const pending: ReturnType<typeof Promise.withResolvers>[] = []
+  const user = vue.reactive({ sessionVersion: 1 })
+  let unmount = () => {}
+  const page = researchPage({ getCoverageApi: () => {
+    const p = Promise.withResolvers()
+    pending.push(p)
+    return p.promise
+  } }, user, { onBeforeUnmount: (fn: () => void) => unmount = fn })
+  page.startAt.value = new Date("2026-10-01T00:00:00Z")
+  const old = page.checkCoverage()
+  page.startAt.value = new Date("2026-10-02T00:00:00Z")
+  const current = page.checkCoverage()
+  pending[1].resolve({ total: 2 })
+  await current
+  pending[0].resolve({ total: 1 })
+  await old
+  assert.equal(page.coverage.value.total, 2)
+  const failed = page.checkCoverage()
+  pending[2].reject(new Error("核查失败"))
+  await failed
+  assert.equal(page.coverageError.value, true)
+  const retry = page.checkCoverage()
+  pending[3].resolve({ total: 3 })
+  await retry
+  assert.equal(page.coverage.value.total, 3)
+  assert.equal(page.coverageError.value, false)
+  const inactive = page.checkCoverage()
+  unmount()
+  pending[4].resolve({ total: 4 })
+  await inactive
+  assert.equal(page.coverage.value, null)
+  await page.checkCoverage()
+  assert.equal(pending.length, 5)
+  user.sessionVersion++
+  await vue.nextTick()
+  assert.equal(page.coverage.value, null)
+  assert.equal(page.startAt.value, null)
+})
+
+test("切换会话后，旧回补核查不能恢复统计结果", async () => {
+  const pending = Promise.withResolvers()
+  const user = vue.reactive({ sessionVersion: 1 })
+  const page = researchPage({ getCoverageApi: () => pending.promise }, user)
+  page.startAt.value = new Date("2026-10-01T00:00:00Z")
+  const old = page.checkCoverage()
+  user.sessionVersion++
+  await vue.nextTick()
+  pending.resolve({ total: 999 })
+  await old
+  assert.equal(page.coverage.value, null)
+  assert.equal(page.startAt.value, null)
+})
+
+test("回补时间无效或晚于当前时间时禁止启用", async () => {
+  let calls = 0
+  const errors: string[] = []
+  const page = researchPage({ enableApi: async () => calls++ }, undefined, { ElMessage: { error: (message: string) => errors.push(message) } })
+  for (const value of [null, new Date("invalid"), new Date(Date.now() + 86400000)]) {
+    page.startAt.value = value
+    await page.enable()
+  }
+  assert.equal(calls, 0)
+  assert.equal(errors.length, 3)
+})
+
 test("两阶段首页保留新查询结果，旧会话与卸载后的响应不写回", async () => {
   const pending: ReturnType<typeof Promise.withResolvers>[] = []
   const user = vue.reactive({ sessionVersion: 1 })