diff --git a/backend/internal/handler/dto/account_list_item_opencode_usage_test.go b/backend/internal/handler/dto/account_list_item_opencode_usage_test.go
new file mode 100644
index 0000000000..74997e8e2a
--- /dev/null
+++ b/backend/internal/handler/dto/account_list_item_opencode_usage_test.go
@@ -0,0 +1,57 @@
+package dto
+
+import (
+	"encoding/json"
+	"testing"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/service"
+	"github.com/stretchr/testify/require"
+)
+
+// 账号列表页固定传 lite=1，lite 投影（AccountListItemFromAccount）必须与完整
+// Account DTO 一样携带 opencode_go_usage，否则前端用量单元格会退回「余额 --」。
+func TestAccountListItemFromAccount_CarriesOpenCodeGoUsage(t *testing.T) {
+	now := time.Now().UTC()
+	// 生产账号 164 的形态：deepseek 平台 + OpenCode Go 官方基址 + apikey
+	eligible := &service.Account{
+		ID: 164, Name: "DeepSeek OpenCode", Platform: service.PlatformDeepseek, Type: service.AccountTypeAPIKey,
+		Credentials: map[string]any{"base_url": "https://opencode.ai/zen/go/v1", "api_key": "test-key"},
+		Extra: map[string]any{
+			service.OpenCodeGoUsageAutoRefreshExtraKey: true,
+			service.OpenCodeGoUsageSnapshotExtraKey: &service.OpenCodeGoUsageSnapshot{
+				Status:        service.OpenCodeGoUsageStatusOK,
+				Data:          &service.OpenCodeGoUsageData{Rolling: service.OpenCodeGoUsageWindow{Status: "ok", Percent: 6}},
+				LastAttemptAt: now, NextRefreshAt: now.Add(time.Hour),
+			},
+		},
+		Status: service.StatusActive,
+	}
+
+	item := AccountListItemFromAccount(AccountFromServiceShallow(eligible))
+	require.NotNil(t, item.OpenCodeGoUsage)
+	require.True(t, item.OpenCodeGoUsage.Eligible)
+	require.True(t, item.OpenCodeGoUsage.AutoRefreshEnabled)
+	require.NotNil(t, item.OpenCodeGoUsage.Snapshot)
+	require.NotNil(t, item.OpenCodeGoUsage.Snapshot.Data)
+	require.Equal(t, 6.0, item.OpenCodeGoUsage.Snapshot.Data.Rolling.Percent)
+
+	raw, err := json.Marshal(item)
+	require.NoError(t, err)
+	require.Contains(t, string(raw), `"opencode_go_usage"`)
+	require.Contains(t, string(raw), `"eligible":true`)
+
+	// 对照：base_url 指向 api.deepseek.com 的普通 deepseek 账号不参与用量窗口
+	ineligible := &service.Account{
+		ID: 165, Name: "DeepSeek Direct", Platform: service.PlatformDeepseek, Type: service.AccountTypeAPIKey,
+		Credentials: map[string]any{"base_url": "https://api.deepseek.com", "api_key": "test-key-2"},
+		Status:      service.StatusActive,
+	}
+
+	plainItem := AccountListItemFromAccount(AccountFromServiceShallow(ineligible))
+	require.Nil(t, plainItem.OpenCodeGoUsage)
+
+	plainRaw, err := json.Marshal(plainItem)
+	require.NoError(t, err)
+	require.NotContains(t, string(plainRaw), `"opencode_go_usage"`)
+}
diff --git a/backend/internal/handler/dto/mappers.go b/backend/internal/handler/dto/mappers.go
index c30ce7d0a9..42a1d82594 100644
--- a/backend/internal/handler/dto/mappers.go
+++ b/backend/internal/handler/dto/mappers.go
@@ -465,8 +465,8 @@ func AccountListItemFromAccount(a *Account) *AccountListItem {
 	return &AccountListItem{
 		ID: a.ID, Name: a.Name, Notes: a.Notes, Platform: a.Platform, Type: a.Type,
 		Credentials: a.Credentials, CredentialsStatus: a.CredentialsStatus, Extra: a.Extra,
-		OllamaCloudUsage: a.OllamaCloudUsage,
-		ProxyID:          a.ProxyID, ProxyFallbackOriginID: a.ProxyFallbackOriginID, ProxyFallbackOriginName: a.ProxyFallbackOriginName,
+		OllamaCloudUsage: a.OllamaCloudUsage, OpenCodeGoUsage: a.OpenCodeGoUsage,
+		ProxyID: a.ProxyID, ProxyFallbackOriginID: a.ProxyFallbackOriginID, ProxyFallbackOriginName: a.ProxyFallbackOriginName,
 		Concurrency: a.Concurrency, LoadFactor: a.LoadFactor, Priority: a.Priority, RateMultiplier: a.RateMultiplier,
 		Status: a.Status, ErrorMessage: a.ErrorMessage, LastUsedAt: a.LastUsedAt, ExpiresAt: a.ExpiresAt,
 		AutoPauseOnExpired: a.AutoPauseOnExpired, CreatedAt: a.CreatedAt, UpdatedAt: a.UpdatedAt,
diff --git a/backend/internal/handler/dto/types.go b/backend/internal/handler/dto/types.go
index 1177f68737..73c02a7af7 100644
--- a/backend/internal/handler/dto/types.go
+++ b/backend/internal/handler/dto/types.go
@@ -341,6 +341,7 @@ type AccountListItem struct {
 	CredentialsStatus map[string]bool                `json:"credentials_status,omitempty"`
 	Extra             map[string]any                 `json:"extra,omitempty"`
 	OllamaCloudUsage  *service.OllamaCloudUsageState `json:"ollama_cloud_usage,omitempty"`
+	OpenCodeGoUsage   *service.OpenCodeGoUsageState  `json:"opencode_go_usage,omitempty"`
 
 	ProxyID                 *int64     `json:"proxy_id"`
 	ProxyFallbackOriginID   *int64     `json:"proxy_fallback_origin_id"`