@satan9394

Machine-wide DeepSeek Harness (dsh) usage statistics: trends, a custom date range that governs every panel, one merged model panel (share + four-bucket split + calls + cost), a session ranking with call drill-down, CSV/JSON export and an optional local cost estimate. 全机 DSH 用量统计：趋势 / 自定义区间（贯穿所有面板）/ 合并模型面板 / 会话排行下钻 / 调用明细 / 导出 / 可选成本估算。

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