fix(usage): sync 5h ResetsAt to SessionWindowEnd and zero expired window

active poll 拿到新 5h ResetsAt 时只回写了 Extra.session_window_utilization，
没回写 SessionWindowEnd column；estimateSetupTokenUsage 读这个 column 作为 5h
窗口结束时间，导致被动采样模式下 dashboard 显示 utilization > 0 但 reset
时间渲染为「现在」。

- syncActiveToPassive 增加 UpdateSessionWindowEnd 回写
- estimateSetupTokenUsage 抄齐 Codex 分支的过期归零 guard，避免 active
  poll 没回写时 UI 渲染矛盾
- UsageProgressBar 区分「待刷新」/「现在」语义；i18n key 中英补齐

backend/internal/repository/account_repo.go

@@ -1273,6 +1273,20 @@ func (r *accountRepository) UpdateSessionWindow(ctx context.Context, id int64, s
 	return nil
 }
 
+func (r *accountRepository) UpdateSessionWindowEnd(ctx context.Context, id int64, end time.Time) error {
+	_, err := r.client.Account.Update().
+		Where(dbaccount.IDEQ(id)).
+		SetSessionWindowEnd(end).
+		Save(ctx)
+	if err != nil {
+		return err
+	}
+	if err := enqueueSchedulerOutbox(ctx, r.sql, service.SchedulerOutboxEventAccountChanged, &id, nil, nil); err != nil {
+		logger.LegacyPrintf("repository.account", "[SchedulerOutbox] enqueue session window end update failed: account=%d err=%v", id, err)
+	}
+	return nil
+}
+
 func (r *accountRepository) SetSchedulable(ctx context.Context, id int64, schedulable bool) error {
 	_, err := r.client.Account.Update().
 		Where(dbaccount.IDEQ(id)).

backend/internal/server/api_contract_test.go

@@ -1775,6 +1775,10 @@ func (s *stubAccountRepo) UpdateSessionWindow(ctx context.Context, id int64, sta
 	return errors.New("not implemented")
 }
 
+func (s *stubAccountRepo) UpdateSessionWindowEnd(ctx context.Context, id int64, end time.Time) error {
+	return errors.New("not implemented")
+}
+
 func (s *stubAccountRepo) UpdateExtra(ctx context.Context, id int64, updates map[string]any) error {
 	return errors.New("not implemented")
 }

backend/internal/service/account_service.go

@@ -68,6 +68,9 @@ type AccountRepository interface {
 	ClearAntigravityQuotaScopes(ctx context.Context, id int64) error
 	ClearModelRateLimits(ctx context.Context, id int64) error
 	UpdateSessionWindow(ctx context.Context, id int64, start, end *time.Time, status string) error
+	// UpdateSessionWindowEnd 仅更新 5h 窗口的结束时间，不动 start / status。
+	// 用于 active poll 拿到新 ResetsAt 后回写，避免覆盖请求路径上记录的 status。
+	UpdateSessionWindowEnd(ctx context.Context, id int64, end time.Time) error
 	UpdateExtra(ctx context.Context, id int64, updates map[string]any) error
 	BulkUpdate(ctx context.Context, ids []int64, updates AccountBulkUpdate) (int64, error)
 	// IncrementQuotaUsed 原子递增 API Key 账号的配额用量（总/日/周）

backend/internal/service/account_service_delete_test.go

@@ -191,6 +191,10 @@ func (s *accountRepoStub) UpdateSessionWindow(ctx context.Context, id int64, sta
 	panic("unexpected UpdateSessionWindow call")
 }
 
+func (s *accountRepoStub) UpdateSessionWindowEnd(ctx context.Context, id int64, end time.Time) error {
+	panic("unexpected UpdateSessionWindowEnd call")
+}
+
 func (s *accountRepoStub) UpdateExtra(ctx context.Context, id int64, updates map[string]any) error {
 	panic("unexpected UpdateExtra call")
 }

backend/internal/service/account_usage_service.go

@@ -492,6 +492,14 @@ func (s *AccountUsageService) syncActiveToPassive(ctx context.Context, accountID
 			slog.Warn("sync_active_to_passive_failed", "account_id", accountID, "error", err)
 		}
 	}
+
+	// 5h ResetsAt 必须回写到 SessionWindowEnd column，estimateSetupTokenUsage
+	// 读这个字段作为窗口结束时间；只塞 Extra 会让 UI 一直拿到上个窗口的过期时间。
+	if usage.FiveHour != nil && usage.FiveHour.ResetsAt != nil {
+		if err := s.accountRepo.UpdateSessionWindowEnd(ctx, accountID, *usage.FiveHour.ResetsAt); err != nil {
+			slog.Warn("sync_active_to_passive_session_window_end_failed", "account_id", accountID, "error", err)
+		}
+	}
 }
 
 func (s *AccountUsageService) getOpenAIUsage(ctx context.Context, account *Account, force bool) (*UsageInfo, error) {
@@ -1305,6 +1313,15 @@ func (s *AccountUsageService) estimateSetupTokenUsage(account *Account) *UsageIn
 			ResetsAt:         account.SessionWindowEnd,
 			RemainingSeconds: remaining,
 		}
+
+		// 窗口已过期（resetAt 在 now 之前）→ 额度已重置，归零；
+		// 与 Codex 分支 buildCodexUsageProgressFromExtra 保持一致，避免
+		// UI 在 active poll 没回写 SessionWindowEnd 时渲染矛盾状态。
+		if info.FiveHour.ResetsAt != nil && !time.Now().Before(*info.FiveHour.ResetsAt) {
+			info.FiveHour.Utilization = 0
+			info.FiveHour.ResetsAt = nil
+			info.FiveHour.RemainingSeconds = 0
+		}
 	} else {
 		// 没有窗口信息，返回空数据
 		info.FiveHour = &UsageProgress{

backend/internal/service/account_usage_session_window_test.go

@@ -0,0 +1,135 @@
+package service
+
+import (
+	"context"
+	"sync"
+	"testing"
+	"time"
+)
+
+// sessionWindowSyncRepo 记录 syncActiveToPassive 触发的所有写操作。
+type sessionWindowSyncRepo struct {
+	AccountRepository
+
+	mu                sync.Mutex
+	extraUpdates      []map[string]any
+	sessionWindowEnds []sessionWindowEndCall
+}
+
+type sessionWindowEndCall struct {
+	AccountID int64
+	End       time.Time
+}
+
+func (r *sessionWindowSyncRepo) UpdateExtra(_ context.Context, _ int64, updates map[string]any) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	copied := make(map[string]any, len(updates))
+	for k, v := range updates {
+		copied[k] = v
+	}
+	r.extraUpdates = append(r.extraUpdates, copied)
+	return nil
+}
+
+func (r *sessionWindowSyncRepo) UpdateSessionWindowEnd(_ context.Context, id int64, end time.Time) error {
+	r.mu.Lock()
+	defer r.mu.Unlock()
+	r.sessionWindowEnds = append(r.sessionWindowEnds, sessionWindowEndCall{AccountID: id, End: end})
+	return nil
+}
+
+func TestEstimateSetupTokenUsage_ExpiredWindowZeroes(t *testing.T) {
+	t.Parallel()
+
+	past := time.Now().Add(-2 * time.Hour)
+	svc := &AccountUsageService{}
+	info := svc.estimateSetupTokenUsage(&Account{
+		SessionWindowEnd: &past,
+		Extra: map[string]any{
+			"session_window_utilization": 0.53,
+		},
+	})
+
+	if info.FiveHour == nil {
+		t.Fatal("expected non-nil FiveHour info")
+	}
+	if info.FiveHour.Utilization != 0 {
+		t.Fatalf("expected Utilization=0 for expired window, got %v", info.FiveHour.Utilization)
+	}
+	if info.FiveHour.ResetsAt != nil {
+		t.Fatalf("expected ResetsAt=nil for expired window, got %v", info.FiveHour.ResetsAt)
+	}
+	if info.FiveHour.RemainingSeconds != 0 {
+		t.Fatalf("expected RemainingSeconds=0 for expired window, got %v", info.FiveHour.RemainingSeconds)
+	}
+}
+
+func TestEstimateSetupTokenUsage_ActiveWindowPreservesUtilization(t *testing.T) {
+	t.Parallel()
+
+	future := time.Now().Add(3 * time.Hour)
+	svc := &AccountUsageService{}
+	info := svc.estimateSetupTokenUsage(&Account{
+		SessionWindowEnd: &future,
+		Extra: map[string]any{
+			"session_window_utilization": 0.53,
+		},
+	})
+
+	if info.FiveHour == nil {
+		t.Fatal("expected non-nil FiveHour info")
+	}
+	if info.FiveHour.Utilization != 53 {
+		t.Fatalf("expected Utilization=53, got %v", info.FiveHour.Utilization)
+	}
+	if info.FiveHour.ResetsAt == nil || !info.FiveHour.ResetsAt.Equal(future) {
+		t.Fatalf("expected ResetsAt=%v, got %v", future, info.FiveHour.ResetsAt)
+	}
+	if info.FiveHour.RemainingSeconds <= 0 {
+		t.Fatalf("expected positive RemainingSeconds, got %v", info.FiveHour.RemainingSeconds)
+	}
+}
+
+func TestSyncActiveToPassive_WritesFiveHourSessionWindowEnd(t *testing.T) {
+	t.Parallel()
+
+	repo := &sessionWindowSyncRepo{}
+	svc := &AccountUsageService{accountRepo: repo}
+	resetsAt := time.Now().Add(3 * time.Hour).UTC().Truncate(time.Second)
+	svc.syncActiveToPassive(context.Background(), 42, &UsageInfo{
+		FiveHour: &UsageProgress{
+			Utilization: 53,
+			ResetsAt:    &resetsAt,
+		},
+	})
+
+	repo.mu.Lock()
+	defer repo.mu.Unlock()
+	if len(repo.sessionWindowEnds) != 1 {
+		t.Fatalf("expected 1 UpdateSessionWindowEnd call, got %d", len(repo.sessionWindowEnds))
+	}
+	call := repo.sessionWindowEnds[0]
+	if call.AccountID != 42 {
+		t.Fatalf("expected AccountID=42, got %d", call.AccountID)
+	}
+	if !call.End.Equal(resetsAt) {
+		t.Fatalf("expected End=%v, got %v", resetsAt, call.End)
+	}
+}
+
+func TestSyncActiveToPassive_SkipsSessionWindowEndWhenResetMissing(t *testing.T) {
+	t.Parallel()
+
+	repo := &sessionWindowSyncRepo{}
+	svc := &AccountUsageService{accountRepo: repo}
+	svc.syncActiveToPassive(context.Background(), 99, &UsageInfo{
+		FiveHour: &UsageProgress{Utilization: 10},
+	})
+
+	repo.mu.Lock()
+	defer repo.mu.Unlock()
+	if len(repo.sessionWindowEnds) != 0 {
+		t.Fatalf("expected no UpdateSessionWindowEnd calls when ResetsAt is nil, got %d", len(repo.sessionWindowEnds))
+	}
+}

backend/internal/service/gateway_multiplatform_test.go

@@ -180,6 +180,9 @@ func (m *mockAccountRepoForPlatform) ClearModelRateLimits(ctx context.Context, i
 func (m *mockAccountRepoForPlatform) UpdateSessionWindow(ctx context.Context, id int64, start, end *time.Time, status string) error {
 	return nil
 }
+func (m *mockAccountRepoForPlatform) UpdateSessionWindowEnd(ctx context.Context, id int64, end time.Time) error {
+	return nil
+}
 func (m *mockAccountRepoForPlatform) UpdateExtra(ctx context.Context, id int64, updates map[string]any) error {
 	return nil
 }

backend/internal/service/gemini_multiplatform_test.go

@@ -169,6 +169,9 @@ func (m *mockAccountRepoForGemini) ClearModelRateLimits(ctx context.Context, id
 func (m *mockAccountRepoForGemini) UpdateSessionWindow(ctx context.Context, id int64, start, end *time.Time, status string) error {
 	return nil
 }
+func (m *mockAccountRepoForGemini) UpdateSessionWindowEnd(ctx context.Context, id int64, end time.Time) error {
+	return nil
+}
 func (m *mockAccountRepoForGemini) UpdateExtra(ctx context.Context, id int64, updates map[string]any) error {
 	return nil
 }

backend/internal/service/ratelimit_session_window_test.go

@@ -37,6 +37,9 @@ func (m *sessionWindowMockRepo) UpdateSessionWindow(_ context.Context, id int64,
 	m.sessionWindowCalls = append(m.sessionWindowCalls, swCall{ID: id, Start: start, End: end, Status: status})
 	return nil
 }
+func (m *sessionWindowMockRepo) UpdateSessionWindowEnd(_ context.Context, _ int64, _ time.Time) error {
+	return nil
+}
 func (m *sessionWindowMockRepo) UpdateExtra(_ context.Context, id int64, updates map[string]any) error {
 	m.updateExtraCalls = append(m.updateExtraCalls, ueCall{ID: id, Updates: updates})
 	return nil

frontend/src/components/account/UsageProgressBar.vue

@@ -149,7 +149,7 @@ const shouldShowResetTime = computed(() => {
 const formatResetTime = computed(() => {
   // For rolling windows, when utilization is 0%, treat as immediately available.
   if (props.showNowWhenIdle && props.utilization <= 0) {
-    return '现在'
+    return t('usage.resetNow')
   }
 
   if (!props.resetsAt) return '-'
@@ -157,7 +157,11 @@ const formatResetTime = computed(() => {
   const date = new Date(props.resetsAt)
   const diffMs = date.getTime() - now.value.getTime()
 
-  if (diffMs <= 0) return '现在'
+  // resetsAt 已过期：utilization>0 说明后端窗口数据还没刷新（active poll 没回写），
+  // 显示「待刷新」以区别于真正可用的「现在」。
+  if (diffMs <= 0) {
+    return props.utilization > 0 ? t('usage.resetPending') : t('usage.resetNow')
+  }
 
   const diffHours = Math.floor(diffMs / (1000 * 60 * 60))
   const diffMins = Math.floor((diffMs % (1000 * 60 * 60)) / (1000 * 60))

frontend/src/components/account/__tests__/UsageProgressBar.spec.ts

@@ -33,7 +33,7 @@ describe('UsageProgressBar', () => {
       }
     })
 
-    expect(wrapper.text()).toContain('现在')
+    expect(wrapper.text()).toContain('usage.resetNow')
     expect(wrapper.text()).not.toContain('2h 30m')
   })
 
@@ -49,7 +49,8 @@ describe('UsageProgressBar', () => {
     })
 
     expect(wrapper.text()).toContain('2h 30m')
-    expect(wrapper.text()).not.toContain('现在')
+    expect(wrapper.text()).not.toContain('usage.resetNow')
+    expect(wrapper.text()).not.toContain('usage.resetPending')
   })
 
   it('showNowWhenIdle=false 时保持原有倒计时行为', () => {
@@ -64,6 +65,35 @@ describe('UsageProgressBar', () => {
     })
 
     expect(wrapper.text()).toContain('2h 30m')
-    expect(wrapper.text()).not.toContain('现在')
+    expect(wrapper.text()).not.toContain('usage.resetNow')
+  })
+
+  it('resetsAt 已过期且利用率大于 0 时显示「待刷新」', () => {
+    const wrapper = mount(UsageProgressBar, {
+      props: {
+        label: '5h',
+        utilization: 53,
+        // 早于 fake system time 2026-03-17T00:00:00Z
+        resetsAt: '2026-03-16T22:00:00Z',
+        color: 'indigo'
+      }
+    })
+
+    expect(wrapper.text()).toContain('usage.resetPending')
+    expect(wrapper.text()).not.toContain('usage.resetNow')
+  })
+
+  it('resetsAt 已过期且利用率为 0 时仍显示「现在」', () => {
+    const wrapper = mount(UsageProgressBar, {
+      props: {
+        label: '5h',
+        utilization: 0,
+        resetsAt: '2026-03-16T22:00:00Z',
+        color: 'indigo'
+      }
+    })
+
+    expect(wrapper.text()).toContain('usage.resetNow')
+    expect(wrapper.text()).not.toContain('usage.resetPending')
   })
 })

frontend/src/i18n/locales/en.ts

@@ -856,6 +856,8 @@ export default {
     accountCost: 'Cost',
     userBilled: 'User billed',
     accountBilled: 'Account billed',
+    resetNow: 'Now',
+    resetPending: 'Pending refresh',
     accountMultiplier: 'Account rate',
     avgDuration: 'Avg Duration',
     inSelectedRange: 'in selected range',

frontend/src/i18n/locales/zh.ts

@@ -860,6 +860,8 @@ export default {
     accountCost: '成本',
     userBilled: '用户扣费',
     accountBilled: '账号计费',
+    resetNow: '现在',
+    resetPending: '待刷新',
     accountMultiplier: '账号倍率',
     avgDuration: '平均耗时',
     inSelectedRange: '所选范围内',