设置供应商成本倍率后，统计页面只显示按成本的统计和图表。能否增加展示成本、原美刀用量统计功能？

[aantior]

RTRT，现在设置成本倍率后，实际用了几百美刀的token，但是后台显示×0.1（我设置的倍率）的成本，不同渠道间无法比较实际用量了。
如果倍率统一设置为1确实可以后台统计展示，但是又不好查看应该付出去的成本。

所以能否增加切换功能，切换 成本|原始美刀 的统计展示功能？

[github-actions]

Thank you for this feature suggestion.

Analysis

This is a valid pain point. Currently, the system only stores and displays the final cost after the cost multiplier is applied. When you set a provider's costMultiplier to 0.1, the dashboard statistics show the multiplied cost (e.g., $10 instead of the actual $100 consumed upstream), making it impossible to compare real token consumption across providers with different multipliers.

Current Implementation

Here is how cost flows through the system today:

1. Cost Calculation (src/lib/utils/cost-calculation.ts:306-310): Base token cost is calculated, then multiplied by the provider's costMultiplier:

   const total = segments.reduce((acc, segment) => acc.plus(segment), new Decimal(0));
   const multiplierDecimal = new Decimal(multiplier);
   return total.mul(multiplierDecimal).toDecimalPlaces(COST_SCALE);

2. Storage (src/drizzle/schema.ts:388-391): The message_request table stores:

   • cost_usd (line 388) - the final cost (already multiplied)
   • cost_multiplier (line 391) - the multiplier value used for that request

3. Statistics Queries (src/repository/statistics.ts:44, 80, 116, 152): All dashboard queries aggregate only the final cost:

   COALESCE(SUM(mr.cost_usd), 0) AS total_cost

4. Dashboard Display (src/app/[locale]/dashboard/_components/statistics/chart.tsx, src/app/[locale]/dashboard/_components/bento/statistics-chart-card.tsx): Charts render the aggregated total_cost directly with no toggle or alternative view.

Feasibility

This feature is feasible because each message_request row already stores the cost_multiplier that was applied (line 391). The original (pre-multiplier) cost can be reverse-calculated:

original_cost = cost_usd / cost_multiplier

Implementation would involve changes to:

• src/repository/statistics.ts - Modify SQL queries to also compute SUM(mr.cost_usd / NULLIF(mr.cost_multiplier, 0)) as an additional original_cost column alongside total_cost
• src/actions/statistics.ts - Pass both total_cost (multiplied) and original_cost (raw USD) to the frontend
• Dashboard chart components - Add a toggle/switch in the UI to let users choose between "Cost" (multiplied) and "Original USD" views
• i18n files - Add translation keys for the toggle labels across all 5 supported languages

Edge cases to consider:

• Rows where cost_multiplier is NULL or 0 (providers with default multiplier 1.0 may have NULL stored)
• Historical data before the cost_multiplier column was introduced

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Automated response from Claude AI

[aantior]

Thank you for this feature suggestion.感谢您的功能建议。

Analysis  分析

This is a valid pain point. Currently, the system only stores and displays the final cost after the cost multiplier is applied. When you set a provider's costMultiplier to 0.1, the dashboard statistics show the multiplied cost (e.g., $10 instead of the actual $100 consumed upstream), making it impossible to compare real token consumption across providers with different multipliers.这是一个有效的痛点。目前，系统仅存储和显示应用成本倍率后的最终成本。当您将供应商的 costMultiplier 设置为 0.1 时，仪表板统计数据会显示倍率后的成本（例如，显示$10 而不是上游实际消耗的$100），这使得无法比较具有不同倍率的供应商之间的实际代币消耗。

Current Implementation  当前实现

Here is how cost flows through the system today:以下是成本在系统中的当前流转方式：

1. Cost Calculation (src/lib/utils/cost-calculation.ts:306-310): Base token cost is calculated, then multiplied by the provider's costMultiplier:成本计算（ src/lib/utils/cost-calculation.ts:306-310 ）：首先计算基础 token 成本，然后乘以供应商的 costMultiplier ：
   const total = segments.reduce((acc, segment) => acc.plus(segment), new Decimal(0));
   const multiplierDecimal = new Decimal(multiplier);
   return total.mul(multiplierDecimal).toDecimalPlaces(COST_SCALE);

2. Storage (src/drizzle/schema.ts:388-391): The message_request table stores:存储（ src/drizzle/schema.ts:388-391 ）： message_request 表存储：

   • cost_usd (line 388) - the final cost (already multiplied) cost_usd （行 388）- 最终成本（已乘以）
   • cost_multiplier (line 391) - the multiplier value used for that request cost_multiplier （行 391）- 用于该请求的乘数值

3. Statistics Queries (src/repository/statistics.ts:44, 80, 116, 152): All dashboard queries aggregate only the final cost:统计查询（ src/repository/statistics.ts:44, 80, 116, 152 ）：所有仪表板查询仅聚合最终成本：
   COALESCE(SUM(mr.cost_usd), 0) AS total_cost

4. Dashboard Display (src/app/[locale]/dashboard/_components/statistics/chart.tsx, src/app/[locale]/dashboard/_components/bento/statistics-chart-card.tsx): Charts render the aggregated total_cost directly with no toggle or alternative view.仪表板显示（ src/app/[locale]/dashboard/_components/statistics/chart.tsx ， src/app/[locale]/dashboard/_components/bento/statistics-chart-card.tsx ）：图表直接渲染聚合的 total_cost ，没有切换或替代视图。

Feasibility  可行性

This feature is feasible because each message_request row already stores the cost_multiplier that was applied (line 391). The original (pre-multiplier) cost can be reverse-calculated:此功能是可行的，因为每个 message_request 行已经存储了应用的 cost_multiplier （第 391 行）。原始（乘数前）成本可以反向计算：

original_cost = cost_usd / cost_multiplier

Implementation would involve changes to:实现将涉及以下更改：

• src/repository/statistics.ts - Modify SQL queries to also compute SUM(mr.cost_usd / NULLIF(mr.cost_multiplier, 0)) as an additional original_cost column alongside total_cost src/repository/statistics.ts - 修改 SQL 查询，以计算 SUM(mr.cost_usd / NULLIF(mr.cost_multiplier, 0)) 作为额外的 original_cost 列，同时计算 total_cost
• src/actions/statistics.ts - Pass both total_cost (multiplied) and original_cost (raw USD) to the frontend src/actions/statistics.ts - 将 total_cost （乘以的）和 original_cost （原始美元）都传递给前端
• Dashboard chart components - Add a toggle/switch in the UI to let users choose between "Cost" (multiplied) and "Original USD" views仪表板图表组件 - 在 UI 中添加一个切换/开关，让用户可以在"成本"（乘以的）和"原始美元"视图之间选择
• i18n files - Add translation keys for the toggle labels across all 5 supported languagesi18n 文件 - 为所有 5 种支持语言的切换标签添加翻译键

Edge cases to consider:  需要考虑的边缘情况：

• Rows where cost_multiplier is NULL or 0 (providers with default multiplier 1.0 may have NULL stored) cost_multiplier 列是 NULL 或 0 的行（默认倍率为 1.0 的供应商可能存储为 NULL）
• Historical data before the cost_multiplier column was introduced cost_multiplier 列引入之前的歷史数据

Automated response from Claude AI来自 Claude AI 的自动回复

确认数据源（Token vs Cost）：如果有 Token 数量，那么“原始成本”最好是根据 Token 算出来的，而不是用“最终价格除以倍率”算出来的。倒除法在倍率为 0 或者浮点数计算时容易出问题。
架构建议（Migration）： AI 之前的建议是在查询时做数学题（Runtime Calculation），这在数据量大时性能差，且 SQL 写起来很脏。建议（Migration）是标准的后端做法：在数据库结构变更时，把脏活累活一次性做完，保证数据库里的数据永远是“清洗干净”的，查询起来既快又准。

[ding113]

正如机器人回复的，由于历史数据只存储了计算倍率后的用量，展示原价格目前处理起来有点麻烦。
目前正在考虑分离日志与计费表，在这部分重构中会考虑分离二者计费值以解决这个问题。