feat(channels): add custom account stats pricing rules

Allow channels to configure independent model pricing for account statistics cost calculation, decoupled from user billing. Backend: - Migration 101: channels.apply_pricing_to_account_stats toggle, channel_account_stats_pricing_rules/model_pricing tables, usage_logs.account_stats_cost column - resolveAccountStatsCost: match rules by group/account, then channel pricing, fallback to original formula when unconfigured - Integrate into both GatewayService.recordUsageCore and OpenAIGatewayService.RecordUsage - Update 8 account stats SQL queries to use COALESCE(account_stats_cost, total_cost) * account_rate_multiplier - 23 unit tests for matching, pricing lookup, and cost calculation Frontend: - Channel edit dialog: toggle + custom rules UI with group/account multi-select and pricing entry cards - API types and i18n (zh/en)
2026-04-11 23:39:49 +08:00
parent 7fad9f604f
commit 7535e312e0
17 changed files with 1449 additions and 244 deletions
--- a/backend/internal/repository/channel_repo.go
+++ b/backend/internal/repository/channel_repo.go
@@ -41,14 +41,10 @@ func (r *channelRepository) Create(ctx context.Context, channel *service.Channel
 		if err != nil {
 			return err
 		}
-		featuresConfigJSON, err := marshalFeaturesConfig(channel.FeaturesConfig)
-		if err != nil {
-			return err
-		}
 		err = tx.QueryRowContext(ctx,
-			`INSERT INTO channels (name, description, status, model_mapping, billing_model_source, restrict_models, features, features_config) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+			`INSERT INTO channels (name, description, status, model_mapping, billing_model_source, restrict_models, features, apply_pricing_to_account_stats) VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
 			 RETURNING id, created_at, updated_at`,
-			channel.Name, channel.Description, channel.Status, modelMappingJSON, channel.BillingModelSource, channel.RestrictModels, channel.Features, featuresConfigJSON,
+			channel.Name, channel.Description, channel.Status, modelMappingJSON, channel.BillingModelSource, channel.RestrictModels, channel.Features, channel.ApplyPricingToAccountStats,
 		).Scan(&channel.ID, &channel.CreatedAt, &channel.UpdatedAt)
 		if err != nil {
 			if isUniqueViolation(err) {
@@ -71,17 +67,24 @@ func (r *channelRepository) Create(ctx context.Context, channel *service.Channel
 			}
 		}

+		// 设置账号统计定价规则
+		if len(channel.AccountStatsPricingRules) > 0 {
+			if err := replaceAccountStatsPricingRulesTx(ctx, tx, channel.ID, channel.AccountStatsPricingRules); err != nil {
+				return err
+			}
+		}
+
 		return nil
 	})
 }

 func (r *channelRepository) GetByID(ctx context.Context, id int64) (*service.Channel, error) {
 	ch := &service.Channel{}
-	var modelMappingJSON, featuresConfigJSON []byte
+	var modelMappingJSON []byte
 	err := r.db.QueryRowContext(ctx,
-		`SELECT id, name, description, status, model_mapping, billing_model_source, restrict_models, features, features_config, created_at, updated_at
+		`SELECT id, name, description, status, model_mapping, billing_model_source, restrict_models, features, apply_pricing_to_account_stats, created_at, updated_at
 		 FROM channels WHERE id = $1`, id,
-	).Scan(&ch.ID, &ch.Name, &ch.Description, &ch.Status, &modelMappingJSON, &ch.BillingModelSource, &ch.RestrictModels, &ch.Features, &featuresConfigJSON, &ch.CreatedAt, &ch.UpdatedAt)
+	).Scan(&ch.ID, &ch.Name, &ch.Description, &ch.Status, &modelMappingJSON, &ch.BillingModelSource, &ch.RestrictModels, &ch.Features, &ch.ApplyPricingToAccountStats, &ch.CreatedAt, &ch.UpdatedAt)
 	if err == sql.ErrNoRows {
 		return nil, service.ErrChannelNotFound
 	}
@@ -89,7 +92,6 @@ func (r *channelRepository) GetByID(ctx context.Context, id int64) (*service.Cha
 		return nil, fmt.Errorf("get channel: %w", err)
 	}
 	ch.ModelMapping = unmarshalModelMapping(modelMappingJSON)
-	ch.FeaturesConfig = unmarshalFeaturesConfig(featuresConfigJSON)

 	groupIDs, err := r.GetGroupIDs(ctx, id)
 	if err != nil {
@@ -103,6 +105,12 @@ func (r *channelRepository) GetByID(ctx context.Context, id int64) (*service.Cha
 	}
 	ch.ModelPricing = pricing

+	statsPricingRules, err := r.loadAccountStatsPricingRules(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	ch.AccountStatsPricingRules = statsPricingRules
+
 	return ch, nil
 }

@@ -112,14 +120,10 @@ func (r *channelRepository) Update(ctx context.Context, channel *service.Channel
 		if err != nil {
 			return err
 		}
-		featuresConfigJSON, err := marshalFeaturesConfig(channel.FeaturesConfig)
-		if err != nil {
-			return err
-		}
 		result, err := tx.ExecContext(ctx,
-			`UPDATE channels SET name = $1, description = $2, status = $3, model_mapping = $4, billing_model_source = $5, restrict_models = $6, features = $7, features_config = $8, updated_at = NOW()
+			`UPDATE channels SET name = $1, description = $2, status = $3, model_mapping = $4, billing_model_source = $5, restrict_models = $6, features = $7, apply_pricing_to_account_stats = $8, updated_at = NOW()
 			 WHERE id = $9`,
-			channel.Name, channel.Description, channel.Status, modelMappingJSON, channel.BillingModelSource, channel.RestrictModels, channel.Features, featuresConfigJSON, channel.ID,
+			channel.Name, channel.Description, channel.Status, modelMappingJSON, channel.BillingModelSource, channel.RestrictModels, channel.Features, channel.ApplyPricingToAccountStats, channel.ID,
 		)
 		if err != nil {
 			if isUniqueViolation(err) {
@@ -146,6 +150,13 @@ func (r *channelRepository) Update(ctx context.Context, channel *service.Channel
 			}
 		}

+		// 更新账号统计定价规则
+		if channel.AccountStatsPricingRules != nil {
+			if err := replaceAccountStatsPricingRulesTx(ctx, tx, channel.ID, channel.AccountStatsPricingRules); err != nil {
+				return err
+			}
+		}
+
 		return nil
 	})
 }
@@ -196,7 +207,7 @@ func (r *channelRepository) List(ctx context.Context, params pagination.Paginati

 	// 查询 channel 列表
 	dataQuery := fmt.Sprintf(
-		`SELECT c.id, c.name, c.description, c.status, c.model_mapping, c.billing_model_source, c.restrict_models, c.features, c.features_config, c.created_at, c.updated_at
+		`SELECT c.id, c.name, c.description, c.status, c.model_mapping, c.billing_model_source, c.restrict_models, c.features, c.apply_pricing_to_account_stats, c.created_at, c.updated_at
 		 FROM channels c WHERE %s ORDER BY %s LIMIT $%d OFFSET $%d`,
 		whereClause, channelListOrderBy(params), argIdx, argIdx+1,
 	)
@@ -212,12 +223,11 @@ func (r *channelRepository) List(ctx context.Context, params pagination.Paginati
 	var channelIDs []int64
 	for rows.Next() {
 		var ch service.Channel
-		var modelMappingJSON, featuresConfigJSON []byte
-		if err := rows.Scan(&ch.ID, &ch.Name, &ch.Description, &ch.Status, &modelMappingJSON, &ch.BillingModelSource, &ch.RestrictModels, &ch.Features, &featuresConfigJSON, &ch.CreatedAt, &ch.UpdatedAt); err != nil {
+		var modelMappingJSON []byte
+		if err := rows.Scan(&ch.ID, &ch.Name, &ch.Description, &ch.Status, &modelMappingJSON, &ch.BillingModelSource, &ch.RestrictModels, &ch.Features, &ch.ApplyPricingToAccountStats, &ch.CreatedAt, &ch.UpdatedAt); err != nil {
 			return nil, nil, fmt.Errorf("scan channel: %w", err)
 		}
 		ch.ModelMapping = unmarshalModelMapping(modelMappingJSON)
-		ch.FeaturesConfig = unmarshalFeaturesConfig(featuresConfigJSON)
 		channels = append(channels, ch)
 		channelIDs = append(channelIDs, ch.ID)
 	}
@@ -235,9 +245,14 @@ func (r *channelRepository) List(ctx context.Context, params pagination.Paginati
 		if err != nil {
 			return nil, nil, err
 		}
+		statsRulesMap, err := r.batchLoadAccountStatsPricingRules(ctx, channelIDs)
+		if err != nil {
+			return nil, nil, err
+		}
 		for i := range channels {
 			channels[i].GroupIDs = groupMap[channels[i].ID]
 			channels[i].ModelPricing = pricingMap[channels[i].ID]
+			channels[i].AccountStatsPricingRules = statsRulesMap[channels[i].ID]
 		}
 	}

@@ -283,7 +298,7 @@ func channelListOrderBy(params pagination.PaginationParams) string {

 func (r *channelRepository) ListAll(ctx context.Context) ([]service.Channel, error) {
 	rows, err := r.db.QueryContext(ctx,
-		`SELECT id, name, description, status, model_mapping, billing_model_source, restrict_models, features, features_config, created_at, updated_at FROM channels ORDER BY id`,
+		`SELECT id, name, description, status, model_mapping, billing_model_source, restrict_models, features, apply_pricing_to_account_stats, created_at, updated_at FROM channels ORDER BY id`,
 	)
 	if err != nil {
 		return nil, fmt.Errorf("query all channels: %w", err)
@@ -294,12 +309,11 @@ func (r *channelRepository) ListAll(ctx context.Context) ([]service.Channel, err
 	var channelIDs []int64
 	for rows.Next() {
 		var ch service.Channel
-		var modelMappingJSON, featuresConfigJSON []byte
-		if err := rows.Scan(&ch.ID, &ch.Name, &ch.Description, &ch.Status, &modelMappingJSON, &ch.BillingModelSource, &ch.RestrictModels, &ch.Features, &featuresConfigJSON, &ch.CreatedAt, &ch.UpdatedAt); err != nil {
+		var modelMappingJSON []byte
+		if err := rows.Scan(&ch.ID, &ch.Name, &ch.Description, &ch.Status, &modelMappingJSON, &ch.BillingModelSource, &ch.RestrictModels, &ch.Features, &ch.ApplyPricingToAccountStats, &ch.CreatedAt, &ch.UpdatedAt); err != nil {
 			return nil, fmt.Errorf("scan channel: %w", err)
 		}
 		ch.ModelMapping = unmarshalModelMapping(modelMappingJSON)
-		ch.FeaturesConfig = unmarshalFeaturesConfig(featuresConfigJSON)
 		channels = append(channels, ch)
 		channelIDs = append(channelIDs, ch.ID)
 	}
@@ -323,9 +337,16 @@ func (r *channelRepository) ListAll(ctx context.Context) ([]service.Channel, err
 		return nil, err
 	}

+	// 批量加载账号统计定价规则
+	statsRulesMap, err := r.batchLoadAccountStatsPricingRules(ctx, channelIDs)
+	if err != nil {
+		return nil, err
+	}
+
 	for i := range channels {
 		channels[i].GroupIDs = groupMap[channels[i].ID]
 		channels[i].ModelPricing = pricingMap[channels[i].ID]
+		channels[i].AccountStatsPricingRules = statsRulesMap[channels[i].ID]
 	}

 	return channels, nil
@@ -467,28 +488,6 @@ func unmarshalModelMapping(data []byte) map[string]map[string]string {
 	return m
 }

-func marshalFeaturesConfig(m map[string]any) ([]byte, error) {
-	if len(m) == 0 {
-		return []byte("{}"), nil
-	}
-	data, err := json.Marshal(m)
-	if err != nil {
-		return nil, fmt.Errorf("marshal features_config: %w", err)
-	}
-	return data, nil
-}
-
-func unmarshalFeaturesConfig(data []byte) map[string]any {
-	if len(data) == 0 {
-		return nil
-	}
-	var m map[string]any
-	if err := json.Unmarshal(data, &m); err != nil {
-		return nil
-	}
-	return m
-}
-
 // GetGroupPlatforms 批量查询分组 ID 对应的平台
 func (r *channelRepository) GetGroupPlatforms(ctx context.Context, groupIDs []int64) (map[int64]string, error) {
 	if len(groupIDs) == 0 {
--- a/backend/internal/repository/channel_repo_account_stats_pricing.go
+++ b/backend/internal/repository/channel_repo_account_stats_pricing.go
@@ -0,0 +1,170 @@
+package repository
+
+import (
+	"context"
+	"database/sql"
+	"encoding/json"
+	"fmt"
+
+	"github.com/Wei-Shaw/sub2api/internal/service"
+	"github.com/lib/pq"
+)
+
+// --- 账号统计定价规则 ---
+
+// batchLoadAccountStatsPricingRules 批量加载多个渠道的账号统计定价规则（含模型定价）
+func (r *channelRepository) batchLoadAccountStatsPricingRules(ctx context.Context, channelIDs []int64) (map[int64][]service.AccountStatsPricingRule, error) {
+	// 1. 查询规则
+	rows, err := r.db.QueryContext(ctx,
+		`SELECT id, channel_id, name, group_ids, account_ids, sort_order, created_at, updated_at
+		 FROM channel_account_stats_pricing_rules WHERE channel_id = ANY($1) ORDER BY channel_id, sort_order, id`,
+		pq.Array(channelIDs),
+	)
+	if err != nil {
+		return nil, fmt.Errorf("batch load account stats pricing rules: %w", err)
+	}
+	defer func() { _ = rows.Close() }()
+
+	var allRules []service.AccountStatsPricingRule
+	var ruleIDs []int64
+	for rows.Next() {
+		var rule service.AccountStatsPricingRule
+		if err := rows.Scan(
+			&rule.ID, &rule.ChannelID, &rule.Name,
+			pq.Array(&rule.GroupIDs), pq.Array(&rule.AccountIDs),
+			&rule.SortOrder, &rule.CreatedAt, &rule.UpdatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scan account stats pricing rule: %w", err)
+		}
+		ruleIDs = append(ruleIDs, rule.ID)
+		allRules = append(allRules, rule)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterate account stats pricing rules: %w", err)
+	}
+
+	// 2. 批量加载规则的模型定价
+	pricingMap, err := r.batchLoadAccountStatsModelPricing(ctx, ruleIDs)
+	if err != nil {
+		return nil, err
+	}
+
+	// 3. 按 channelID 分组并关联定价
+	result := make(map[int64][]service.AccountStatsPricingRule, len(channelIDs))
+	for i := range allRules {
+		allRules[i].Pricing = pricingMap[allRules[i].ID]
+		result[allRules[i].ChannelID] = append(result[allRules[i].ChannelID], allRules[i])
+	}
+
+	return result, nil
+}
+
+// batchLoadAccountStatsModelPricing 批量加载规则的模型定价
+func (r *channelRepository) batchLoadAccountStatsModelPricing(ctx context.Context, ruleIDs []int64) (map[int64][]service.ChannelModelPricing, error) {
+	if len(ruleIDs) == 0 {
+		return make(map[int64][]service.ChannelModelPricing), nil
+	}
+
+	rows, err := r.db.QueryContext(ctx,
+		`SELECT id, rule_id, platform, models, billing_mode, input_price, output_price,
+		        cache_write_price, cache_read_price, image_output_price, per_request_price, created_at, updated_at
+		 FROM channel_account_stats_model_pricing WHERE rule_id = ANY($1) ORDER BY rule_id, id`,
+		pq.Array(ruleIDs),
+	)
+	if err != nil {
+		return nil, fmt.Errorf("batch load account stats model pricing: %w", err)
+	}
+	defer func() { _ = rows.Close() }()
+
+	pricingMap := make(map[int64][]service.ChannelModelPricing, len(ruleIDs))
+	for rows.Next() {
+		var p service.ChannelModelPricing
+		var ruleID int64
+		var modelsJSON []byte
+		if err := rows.Scan(
+			&p.ID, &ruleID, &p.Platform, &modelsJSON, &p.BillingMode,
+			&p.InputPrice, &p.OutputPrice, &p.CacheWritePrice, &p.CacheReadPrice,
+			&p.ImageOutputPrice, &p.PerRequestPrice, &p.CreatedAt, &p.UpdatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scan account stats model pricing: %w", err)
+		}
+		if err := json.Unmarshal(modelsJSON, &p.Models); err != nil {
+			p.Models = []string{}
+		}
+		pricingMap[ruleID] = append(pricingMap[ruleID], p)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterate account stats model pricing: %w", err)
+	}
+	return pricingMap, nil
+}
+
+// loadAccountStatsPricingRules 加载单个渠道的账号统计定价规则（供 GetByID 使用）
+func (r *channelRepository) loadAccountStatsPricingRules(ctx context.Context, channelID int64) ([]service.AccountStatsPricingRule, error) {
+	result, err := r.batchLoadAccountStatsPricingRules(ctx, []int64{channelID})
+	if err != nil {
+		return nil, err
+	}
+	return result[channelID], nil
+}
+
+// replaceAccountStatsPricingRulesTx 在事务中替换渠道的账号统计定价规则（删除旧的 + 插入新的）
+func replaceAccountStatsPricingRulesTx(ctx context.Context, tx *sql.Tx, channelID int64, rules []service.AccountStatsPricingRule) error {
+	// CASCADE 会自动删除关联的 model_pricing
+	if _, err := tx.ExecContext(ctx,
+		`DELETE FROM channel_account_stats_pricing_rules WHERE channel_id = $1`, channelID,
+	); err != nil {
+		return fmt.Errorf("delete old account stats pricing rules: %w", err)
+	}
+
+	for i := range rules {
+		rules[i].ChannelID = channelID
+		if err := createAccountStatsPricingRuleTx(ctx, tx, &rules[i]); err != nil {
+			return fmt.Errorf("insert account stats pricing rule: %w", err)
+		}
+	}
+	return nil
+}
+
+// createAccountStatsPricingRuleTx 在事务中创建单条账号统计定价规则及其模型定价
+func createAccountStatsPricingRuleTx(ctx context.Context, tx *sql.Tx, rule *service.AccountStatsPricingRule) error {
+	err := tx.QueryRowContext(ctx,
+		`INSERT INTO channel_account_stats_pricing_rules (channel_id, name, group_ids, account_ids, sort_order)
+		 VALUES ($1, $2, $3, $4, $5) RETURNING id, created_at, updated_at`,
+		rule.ChannelID, rule.Name, pq.Array(rule.GroupIDs), pq.Array(rule.AccountIDs), rule.SortOrder,
+	).Scan(&rule.ID, &rule.CreatedAt, &rule.UpdatedAt)
+	if err != nil {
+		return fmt.Errorf("insert account stats pricing rule: %w", err)
+	}
+
+	for j := range rule.Pricing {
+		if err := createAccountStatsModelPricingTx(ctx, tx, rule.ID, &rule.Pricing[j]); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// createAccountStatsModelPricingTx 在事务中创建单条账号统计模型定价
+func createAccountStatsModelPricingTx(ctx context.Context, tx *sql.Tx, ruleID int64, pricing *service.ChannelModelPricing) error {
+	modelsJSON, err := json.Marshal(pricing.Models)
+	if err != nil {
+		return fmt.Errorf("marshal models: %w", err)
+	}
+	billingMode := pricing.BillingMode
+	if billingMode == "" {
+		billingMode = service.BillingModeToken
+	}
+	platform := pricing.Platform
+	err = tx.QueryRowContext(ctx,
+		`INSERT INTO channel_account_stats_model_pricing (rule_id, platform, models, billing_mode, input_price, output_price, cache_write_price, cache_read_price, image_output_price, per_request_price)
+		 VALUES ($1, $2, $3, $4, $5, $6, $7, $8, $9, $10) RETURNING id, created_at, updated_at`,
+		ruleID, platform, modelsJSON, billingMode,
+		pricing.InputPrice, pricing.OutputPrice, pricing.CacheWritePrice, pricing.CacheReadPrice,
+		pricing.ImageOutputPrice, pricing.PerRequestPrice,
+	).Scan(&pricing.ID, &pricing.CreatedAt, &pricing.UpdatedAt)
+	if err != nil {
+		return fmt.Errorf("insert account stats model pricing: %w", err)
+	}
+	return nil
+}
--- a/backend/internal/repository/usage_log_repo.go
+++ b/backend/internal/repository/usage_log_repo.go
@@ -28,7 +28,7 @@ import (
 	gocache "github.com/patrickmn/go-cache"
 )

-const usageLogSelectColumns = "id, user_id, api_key_id, account_id, request_id, model, requested_model, upstream_model, group_id, subscription_id, input_tokens, output_tokens, cache_creation_tokens, cache_read_tokens, cache_creation_5m_tokens, cache_creation_1h_tokens, image_output_tokens, image_output_cost, input_cost, output_cost, cache_creation_cost, cache_read_cost, total_cost, actual_cost, rate_multiplier, account_rate_multiplier, billing_type, request_type, stream, openai_ws_mode, duration_ms, first_token_ms, user_agent, ip_address, image_count, image_size, service_tier, reasoning_effort, inbound_endpoint, upstream_endpoint, cache_ttl_overridden, channel_id, model_mapping_chain, billing_tier, billing_mode, created_at"
+const usageLogSelectColumns = "id, user_id, api_key_id, account_id, request_id, model, requested_model, upstream_model, group_id, subscription_id, input_tokens, output_tokens, cache_creation_tokens, cache_read_tokens, cache_creation_5m_tokens, cache_creation_1h_tokens, image_output_tokens, image_output_cost, input_cost, output_cost, cache_creation_cost, cache_read_cost, total_cost, actual_cost, rate_multiplier, account_rate_multiplier, billing_type, request_type, stream, openai_ws_mode, duration_ms, first_token_ms, user_agent, ip_address, image_count, image_size, service_tier, reasoning_effort, inbound_endpoint, upstream_endpoint, cache_ttl_overridden, channel_id, model_mapping_chain, billing_tier, billing_mode, account_stats_cost, created_at"

 // usageLogInsertArgTypes must stay in the same order as:
 //  1. prepareUsageLogInsert().args
@@ -82,6 +82,7 @@ var usageLogInsertArgTypes = [...]string{
 	"text",        // model_mapping_chain
 	"text",        // billing_tier
 	"text",        // billing_mode
+	"numeric",     // account_stats_cost
 	"timestamptz", // created_at
 }

@@ -360,6 +361,7 @@ func (r *usageLogRepository) createSingle(ctx context.Context, sqlq sqlExecutor,
 			model_mapping_chain,
 			billing_tier,
 			billing_mode,
+			account_stats_cost,
 			created_at
 		) VALUES (
 			$1, $2, $3, $4, $5, $6, $7,
@@ -367,7 +369,7 @@ func (r *usageLogRepository) createSingle(ctx context.Context, sqlq sqlExecutor,
 			$10, $11, $12, $13,
 			$14, $15, $16, $17,
 			$18, $19, $20, $21, $22, $23,
-			$24, $25, $26, $27, $28, $29, $30, $31, $32, $33, $34, $35, $36, $37, $38, $39, $40, $41, $42, $43, $44, $45
+			$24, $25, $26, $27, $28, $29, $30, $31, $32, $33, $34, $35, $36, $37, $38, $39, $40, $41, $42, $43, $44, $45, $46
 		)
 		ON CONFLICT (request_id, api_key_id) DO NOTHING
 		RETURNING id, created_at
@@ -797,6 +799,7 @@ func buildUsageLogBatchInsertQuery(keys []string, preparedByKey map[string]usage
 			model_mapping_chain,
 			billing_tier,
 			billing_mode,
+			account_stats_cost,
 			created_at
 		) AS (VALUES `)

@@ -873,6 +876,7 @@ func buildUsageLogBatchInsertQuery(keys []string, preparedByKey map[string]usage
 				model_mapping_chain,
 				billing_tier,
 				billing_mode,
+				account_stats_cost,
 				created_at
 			)
 			SELECT
@@ -920,6 +924,7 @@ func buildUsageLogBatchInsertQuery(keys []string, preparedByKey map[string]usage
 				model_mapping_chain,
 				billing_tier,
 				billing_mode,
+				account_stats_cost,
 				created_at
 			FROM input
 			ON CONFLICT (request_id, api_key_id) DO NOTHING
@@ -1007,10 +1012,11 @@ func buildUsageLogBestEffortInsertQuery(preparedList []usageLogInsertPrepared) (
 			model_mapping_chain,
 			billing_tier,
 			billing_mode,
+			account_stats_cost,
 			created_at
 		) AS (VALUES `)

-	args := make([]any, 0, len(preparedList)*45)
+	args := make([]any, 0, len(preparedList)*46)
 	argPos := 1
 	for idx, prepared := range preparedList {
 		if idx > 0 {
@@ -1080,6 +1086,7 @@ func buildUsageLogBestEffortInsertQuery(preparedList []usageLogInsertPrepared) (
 			model_mapping_chain,
 			billing_tier,
 			billing_mode,
+			account_stats_cost,
 			created_at
 		)
 		SELECT
@@ -1127,6 +1134,7 @@ func buildUsageLogBestEffortInsertQuery(preparedList []usageLogInsertPrepared) (
 			model_mapping_chain,
 			billing_tier,
 			billing_mode,
+			account_stats_cost,
 			created_at
 		FROM input
 		ON CONFLICT (request_id, api_key_id) DO NOTHING
@@ -1182,6 +1190,7 @@ func execUsageLogInsertNoResult(ctx context.Context, sqlq sqlExecutor, prepared
 			model_mapping_chain,
 			billing_tier,
 			billing_mode,
+			account_stats_cost,
 			created_at
 		) VALUES (
 			$1, $2, $3, $4, $5, $6, $7,
@@ -1189,7 +1198,7 @@ func execUsageLogInsertNoResult(ctx context.Context, sqlq sqlExecutor, prepared
 			$10, $11, $12, $13,
 			$14, $15, $16, $17,
 			$18, $19, $20, $21, $22, $23,
-			$24, $25, $26, $27, $28, $29, $30, $31, $32, $33, $34, $35, $36, $37, $38, $39, $40, $41, $42, $43, $44, $45
+			$24, $25, $26, $27, $28, $29, $30, $31, $32, $33, $34, $35, $36, $37, $38, $39, $40, $41, $42, $43, $44, $45, $46
 		)
 		ON CONFLICT (request_id, api_key_id) DO NOTHING
 	`, prepared.args...)
@@ -1285,6 +1294,7 @@ func prepareUsageLogInsert(log *service.UsageLog) usageLogInsertPrepared {
 			modelMappingChain,
 			billingTier,
 			billingMode,
+			log.AccountStatsCost, // account_stats_cost
 			createdAt,
 		},
 	}
@@ -1959,7 +1969,7 @@ func (r *usageLogRepository) GetAccountTodayStats(ctx context.Context, accountID
 		SELECT
 			COUNT(*) as requests,
 			COALESCE(SUM(input_tokens + output_tokens + cache_creation_tokens + cache_read_tokens), 0) as tokens,
-			COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as cost,
+			COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as cost,
 			COALESCE(SUM(total_cost), 0) as standard_cost,
 			COALESCE(SUM(actual_cost), 0) as user_cost
 		FROM usage_logs
@@ -1989,7 +1999,7 @@ func (r *usageLogRepository) GetAccountWindowStats(ctx context.Context, accountI
 		SELECT
 			COUNT(*) as requests,
 			COALESCE(SUM(input_tokens + output_tokens + cache_creation_tokens + cache_read_tokens), 0) as tokens,
-			COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as cost,
+			COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as cost,
 			COALESCE(SUM(total_cost), 0) as standard_cost,
 			COALESCE(SUM(actual_cost), 0) as user_cost
 		FROM usage_logs
@@ -2026,7 +2036,7 @@ func (r *usageLogRepository) GetAccountWindowStatsBatch(ctx context.Context, acc
 			account_id,
 			COUNT(*) as requests,
 			COALESCE(SUM(input_tokens + output_tokens + cache_creation_tokens + cache_read_tokens), 0) as tokens,
-			COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as cost,
+			COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as cost,
 			COALESCE(SUM(total_cost), 0) as standard_cost,
 			COALESCE(SUM(actual_cost), 0) as user_cost
 		FROM usage_logs
@@ -2990,7 +3000,7 @@ func (r *usageLogRepository) getModelStatsWithFiltersBySource(ctx context.Contex
 	actualCostExpr := "COALESCE(SUM(actual_cost), 0) as actual_cost"
 	// 当仅按 account_id 聚合时，实际费用使用账号倍率（total_cost * account_rate_multiplier）。
 	if accountID > 0 && userID == 0 && apiKeyID == 0 {
-		actualCostExpr = "COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost"
+		actualCostExpr = "COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost"
 	}
 	modelExpr := resolveModelDimensionExpression(source)

@@ -3358,7 +3368,7 @@ func (r *usageLogRepository) GetStatsWithFilters(ctx context.Context, filters Us
 			COALESCE(SUM(cache_creation_tokens + cache_read_tokens), 0) as total_cache_tokens,
 			COALESCE(SUM(total_cost), 0) as total_cost,
 			COALESCE(SUM(actual_cost), 0) as total_actual_cost,
-			COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as total_account_cost,
+			COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as total_account_cost,
 			COALESCE(AVG(duration_ms), 0) as avg_duration_ms
 		FROM usage_logs
 		%s
@@ -3433,7 +3443,7 @@ type EndpointStat = usagestats.EndpointStat
 func (r *usageLogRepository) getEndpointStatsByColumnWithFilters(ctx context.Context, endpointColumn string, startTime, endTime time.Time, userID, apiKeyID, accountID, groupID int64, model string, requestType *int16, stream *bool, billingType *int8) (results []EndpointStat, err error) {
 	actualCostExpr := "COALESCE(SUM(actual_cost), 0) as actual_cost"
 	if accountID > 0 && userID == 0 && apiKeyID == 0 {
-		actualCostExpr = "COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost"
+		actualCostExpr = "COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost"
 	}

 	query := fmt.Sprintf(`
@@ -3500,7 +3510,7 @@ func (r *usageLogRepository) getEndpointStatsByColumnWithFilters(ctx context.Con
 func (r *usageLogRepository) getEndpointPathStatsWithFilters(ctx context.Context, startTime, endTime time.Time, userID, apiKeyID, accountID, groupID int64, model string, requestType *int16, stream *bool, billingType *int8) (results []EndpointStat, err error) {
 	actualCostExpr := "COALESCE(SUM(actual_cost), 0) as actual_cost"
 	if accountID > 0 && userID == 0 && apiKeyID == 0 {
-		actualCostExpr = "COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost"
+		actualCostExpr = "COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost"
 	}

 	query := fmt.Sprintf(`
@@ -3591,7 +3601,7 @@ func (r *usageLogRepository) GetAccountUsageStats(ctx context.Context, accountID
 			COUNT(*) as requests,
 			COALESCE(SUM(input_tokens + output_tokens + cache_creation_tokens + cache_read_tokens), 0) as tokens,
 			COALESCE(SUM(total_cost), 0) as cost,
-			COALESCE(SUM(total_cost * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost,
+			COALESCE(SUM(COALESCE(account_stats_cost, total_cost) * COALESCE(account_rate_multiplier, 1)), 0) as actual_cost,
 			COALESCE(SUM(actual_cost), 0) as user_cost
 		FROM usage_logs
 		WHERE account_id = $1 AND created_at >= $2 AND created_at < $3
@@ -4069,6 +4079,7 @@ func scanUsageLog(scanner interface{ Scan(...any) error }) (*service.UsageLog, e
 		modelMappingChain     sql.NullString
 		billingTier           sql.NullString
 		billingMode           sql.NullString
+		accountStatsCost      sql.NullFloat64
 		createdAt             time.Time
 	)

@@ -4118,6 +4129,7 @@ func scanUsageLog(scanner interface{ Scan(...any) error }) (*service.UsageLog, e
 		&modelMappingChain,
 		&billingTier,
 		&billingMode,
+		&accountStatsCost,
 		&createdAt,
 	); err != nil {
 		return nil, err
@@ -4214,6 +4226,9 @@ func scanUsageLog(scanner interface{ Scan(...any) error }) (*service.UsageLog, e
 	if billingMode.Valid {
 		log.BillingMode = &billingMode.String
 	}
+	if accountStatsCost.Valid {
+		log.AccountStatsCost = &accountStatsCost.Float64
+	}

 	return log, nil
 }
--- a/backend/internal/repository/usage_log_repo_request_type_test.go
+++ b/backend/internal/repository/usage_log_repo_request_type_test.go
@@ -85,6 +85,7 @@ func TestUsageLogRepositoryCreateSyncRequestTypeAndLegacyFields(t *testing.T) {
 			sqlmock.AnyArg(), // model_mapping_chain
 			sqlmock.AnyArg(), // billing_tier
 			sqlmock.AnyArg(), // billing_mode
+			sqlmock.AnyArg(), // account_stats_cost
 			createdAt,
 		).
 		WillReturnRows(sqlmock.NewRows([]string{"id", "created_at"}).AddRow(int64(99), createdAt))
@@ -163,6 +164,7 @@ func TestUsageLogRepositoryCreate_PersistsServiceTier(t *testing.T) {
 			sqlmock.AnyArg(), // model_mapping_chain
 			sqlmock.AnyArg(), // billing_tier
 			sqlmock.AnyArg(), // billing_mode
+			sqlmock.AnyArg(), // account_stats_cost
 			createdAt,
 		).
 		WillReturnRows(sqlmock.NewRows([]string{"id", "created_at"}).AddRow(int64(100), createdAt))
@@ -483,10 +485,11 @@ func TestScanUsageLogRequestTypeAndLegacyFallback(t *testing.T) {
 			sql.NullString{},
 			sql.NullString{},
 			false,
-			sql.NullInt64{},  // channel_id
-			sql.NullString{}, // model_mapping_chain
-			sql.NullString{}, // billing_tier
-			sql.NullString{}, // billing_mode
+			sql.NullInt64{},   // channel_id
+			sql.NullString{},  // model_mapping_chain
+			sql.NullString{},  // billing_tier
+			sql.NullString{},  // billing_mode
+			sql.NullFloat64{}, // account_stats_cost
 			now,
 		}})
 		require.NoError(t, err)
@@ -530,10 +533,11 @@ func TestScanUsageLogRequestTypeAndLegacyFallback(t *testing.T) {
 			sql.NullString{},
 			sql.NullString{},
 			false,
-			sql.NullInt64{},  // channel_id
-			sql.NullString{}, // model_mapping_chain
-			sql.NullString{}, // billing_tier
-			sql.NullString{}, // billing_mode
+			sql.NullInt64{},   // channel_id
+			sql.NullString{},  // model_mapping_chain
+			sql.NullString{},  // billing_tier
+			sql.NullString{},  // billing_mode
+			sql.NullFloat64{}, // account_stats_cost
 			now,
 		}})
 		require.NoError(t, err)
@@ -577,10 +581,11 @@ func TestScanUsageLogRequestTypeAndLegacyFallback(t *testing.T) {
 			sql.NullString{},
 			sql.NullString{},
 			false,
-			sql.NullInt64{},  // channel_id
-			sql.NullString{}, // model_mapping_chain
-			sql.NullString{}, // billing_tier
-			sql.NullString{}, // billing_mode
+			sql.NullInt64{},   // channel_id
+			sql.NullString{},  // model_mapping_chain
+			sql.NullString{},  // billing_tier
+			sql.NullString{},  // billing_mode
+			sql.NullFloat64{}, // account_stats_cost
 			now,
 		}})
 		require.NoError(t, err)