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a1e35a0bd8
Update the delta / gamma / theta / vega / rho response-field descriptions on the Calc Index (calc_indexes) interface across all three languages (zh-CN / zh-HK / en). Key change: **theta now documents the per-day semantics** — the raw value has been divided by 365 on the server to convert to a daily value (previously the docs incorrectly said divide by 100). delta/gamma get full descriptions; vega/rho reworded to the /100 form. Source of truth: the 期权希腊字母 spec table. Matches the SDK (longbridge/openapi#586), MCP, and CLI changes.