chore: ignore local artifacts and remove dead api key trend impl

.gitignore

@@ -85,6 +85,11 @@ temp/
 .cache/
 .dev/
 .serena/
+.omc/
+.workbuddy/
+backend/.omc/
+frontend/.omc/
+backend/cmd/server/.omc/
 
 # ===================
 # 构建产物
@@ -134,4 +139,18 @@ docs/*
 frontend/coverage/
 aicodex
 output/
+backend/dump.rdb
+test-reports/
+config_final*.txt
+config_test_output.txt
+config_test_result*.txt
+handler_final*.txt
+handler_test*.txt
+mid_test.txt
+middleware_test.txt
+new_domain_tests.txt
+setup_test.txt
+test_build_errors.txt
+test_config_results.txt
+backend/test_*.txt
 

backend/internal/repository/usage_log_repo.go

@@ -2134,64 +2134,6 @@ type UserUsageTrendPoint = usagestats.UserUsageTrendPoint
 type UserSpendingRankingItem = usagestats.UserSpendingRankingItem
 type UserSpendingRankingResponse = usagestats.UserSpendingRankingResponse
 
-// APIKeyUsageTrendPoint represents API key usage trend data point
-type APIKeyUsageTrendPoint = usagestats.APIKeyUsageTrendPoint
-
-// GetAPIKeyUsageTrend returns usage trend data grouped by API key and date
-func (r *usageLogRepository) GetAPIKeyUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) (results []APIKeyUsageTrendPoint, err error) {
-	dateFormat := safeDateFormat(granularity)
-
-	query := fmt.Sprintf(`
-		WITH top_keys AS (
-			SELECT api_key_id
-			FROM usage_logs
-			WHERE created_at >= $1 AND created_at < $2
-			GROUP BY api_key_id
-			ORDER BY SUM(input_tokens + output_tokens + cache_creation_tokens + cache_read_tokens) DESC
-			LIMIT $3
-		)
-		SELECT
-			TO_CHAR(u.created_at, '%s') as date,
-			u.api_key_id,
-			COALESCE(k.name, '') as key_name,
-			COUNT(*) as requests,
-			COALESCE(SUM(u.input_tokens + u.output_tokens + u.cache_creation_tokens + u.cache_read_tokens), 0) as tokens
-		FROM usage_logs u
-		LEFT JOIN api_keys k ON u.api_key_id = k.id
-		WHERE u.api_key_id IN (SELECT api_key_id FROM top_keys)
-		  AND u.created_at >= $4 AND u.created_at < $5
-		GROUP BY date, u.api_key_id, k.name
-		ORDER BY date ASC, tokens DESC
-	`, dateFormat)
-
-	rows, err := r.sql.QueryContext(ctx, query, startTime, endTime, limit, startTime, endTime)
-	if err != nil {
-		return nil, err
-	}
-	defer func() {
-		// 保持主错误优先；仅在无错误时回传 Close 失败。
-		// 同时清空返回值，避免误用不完整结果。
-		if closeErr := rows.Close(); closeErr != nil && err == nil {
-			err = closeErr
-			results = nil
-		}
-	}()
-
-	results = make([]APIKeyUsageTrendPoint, 0)
-	for rows.Next() {
-		var row APIKeyUsageTrendPoint
-		if err = rows.Scan(&row.Date, &row.APIKeyID, &row.KeyName, &row.Requests, &row.Tokens); err != nil {
-			return nil, err
-		}
-		results = append(results, row)
-	}
-	if err = rows.Err(); err != nil {
-		return nil, err
-	}
-
-	return results, nil
-}
-
 // GetUserUsageTrend returns usage trend data grouped by user and date
 func (r *usageLogRepository) GetUserUsageTrend(ctx context.Context, startTime, endTime time.Time, granularity string, limit int) (results []UserUsageTrendPoint, err error) {
 	dateFormat := safeDateFormat(granularity)