Merge remote-tracking branch 'origin/main' into feat/trade-submit-multileg

# Conflicts:
#	CHANGELOG.md
#	c/src/trade_context/context.rs
#	c/src/trade_context/types.rs
#	nodejs/index.d.ts

Co-authored-by: sunli829 <20092316+sunli829@users.noreply.github.com>

Author: Copilot

CHANGELOG.md

@@ -10,12 +10,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - **All languages:** add `TradeContext.submit_multileg` (`POST /v1/trade/order/multileg`) — submit a multi-leg option combination order (vertical spreads, straddles, strangles, collars, etc.) whose legs are placed together as a single strategy order. Takes `side`, `order_type`, `submitted_quantity`, `strategy` (`MultiLegStrategy`), a list of legs (`symbol` + `ratio_quantity`), and optional `submitted_price` / `remark` / `client_request_id`; returns the existing `SubmitOrderResponse`
 - **All languages:** order queries and the order push now expose multi-leg strategy information. `Order` (from `today_orders` / `history_orders`), `OrderDetail` (from `order_detail`), and the `PushOrderChanged` order-changed event gain an optional `multi_leg` field (`MultiLegInfo`) — present only for multi-leg option combination orders — carrying the `strategy`, `strategy_name`, `multileg_id`, `code`, and the combination `legs` (each with `symbol`, `side`, `position`, `ratio_quantity`, `strike_price`, `expire_date`, and `contract_direction`). Adds the `MultiLegStrategy`, `MultiLegPosition`, and `ContractDirection` enums
+- **All languages:** add grid-trading support via a standalone `GridContext` — submit / replace / cancel / suspend / restart grid orders, list orders (paged and by IDs), fetch order detail and trigger history, submit the strategy risk-disclosure questionnaire, and query the security (symbol) info (`symbol_info` → `GridSymbolInfo`: name, last price, lot sizes, price-step rules, channel/authorization) needed to build a grid order. Available in the Rust, Python, Node.js, Java, and C/C++ bindings
 - **All languages:** `Execution` gains a `side` field (`OrderSide`) — the buy/sell direction of the fill, now returned by the `today_executions`, `history_executions`, and `all_executions` responses
 
 ### Fixed
 
 - **All languages:** the AI Agent streamed conversation no longer errors mid-run when the server sends an explicit `"outputs": null`. `WorkflowFinishedPayload.outputs`, `NodeToolUseFinishedPayload.outputs`, and `SubagentFinishedPayload.outputs` were annotated `#[serde(default)]`, which only covers a *missing* key, not an explicit `null` — so a `workflow_finished` / `node_tool_use_finished` / `subagent_finished` event carrying `null` outputs failed to deserialize and aborted the whole event stream (`invalid type: null, expected struct WorkflowOutputs`). These fields now map `null` to the type's default
 - **All languages:** likewise, list-typed fields on the streamed AI Agent event payloads no longer error on an explicit `null` (`invalid type: null, expected a sequence`). `tip_chips` (on the node / subagent / agent-tool `*_started` payloads), `WorkflowFinishedPayload.process_data`, and `SubagentStartedPayload.tools` were `#[serde(default)]`, which does not accept an explicit `null`; they now deserialize `null` to an empty list
+- **All languages:** clarified that `CompanyOverview.employees` is typed as a **string** (not an integer) across all SDK languages — the Longbridge API returns this field as a JSON string (e.g. `"10000"`). Doc comments have been updated to make this explicit and prevent downstream tools from incorrectly treating the value as an integer
 
 ## [4.5.0] - 2026-08-14
 

c/cbindgen.toml

@@ -111,6 +111,25 @@ cpp_compat = true
 "COrderChargeItem" = "lb_order_charge_item_t"
 "COrderChargeDetail" = "lb_order_charge_detail_t"
 "COrderDetail" = "lb_order_detail_t"
+"CGridTradeRule" = "lb_grid_trade_rule_t"
+"CSubmitGridOrderOptions" = "lb_submit_grid_order_options_t"
+"CReplaceGridOrderOptions" = "lb_replace_grid_order_options_t"
+"CGetGridOrdersOptions" = "lb_get_grid_orders_options_t"
+"CGetGridOrdersByIdsOptions" = "lb_get_grid_orders_by_ids_options_t"
+"CGetGridOrderDetailOptions" = "lb_get_grid_order_detail_options_t"
+"CGetGridTriggerHistoryOptions" = "lb_get_grid_trigger_history_options_t"
+"CSubmitGridOrderResponse" = "lb_submit_grid_order_response_t"
+"CGridOrder" = "lb_grid_order_t"
+"CGridOrderSubOrder" = "lb_grid_order_sub_order_t"
+"CGridOrderHistory" = "lb_grid_order_history_t"
+"CGridOrderDetail" = "lb_grid_order_detail_t"
+"CTriggerOrder" = "lb_trigger_order_t"
+"CGridBidSize" = "lb_grid_bid_size_t"
+"CGridChannelInfo" = "lb_grid_channel_info_t"
+"CGridSymbolInfo" = "lb_grid_symbol_info_t"
+"CGridOrdersResponse" = "lb_grid_orders_response_t"
+"CGridTriggerHistoryResponse" = "lb_grid_trigger_history_response_t"
+"CPushGridOrderChanged" = "lb_push_grid_order_changed_t"
 "CEstimateMaxPurchaseQuantityOptions" = "lb_estimate_max_purchase_quantity_options_t"
 "CEstimateMaxPurchaseQuantityResponse" = "lb_estimate_max_purchase_quantity_response_t"
 "CCreateWatchlistGroup" = "lb_create_watchlist_group_t"
@@ -143,6 +162,7 @@ cpp_compat = true
 "CFundamentalContext" = "lb_fundamental_context_t"
 "CAlertContext" = "lb_alert_context_t"
 "CDCAContext" = "lb_dca_context_t"
+"CGridContext" = "lb_grid_context_t"
 "CSharelistContext" = "lb_sharelist_context_t"
 "CCalendarContext" = "lb_calendar_context_t"
 "CPortfolioContext" = "lb_portfolio_context_t"
@@ -408,6 +428,13 @@ include = [
     "CWatchlistSecurity",
     "CMarginRatio",
     "COrderDetail",
+    # GridContext: grid trading (reachable only via void* async data pointer)
+    "CSubmitGridOrderResponse",
+    "CGridOrder", "CGridOrderSubOrder", "CGridOrderHistory", "CGridOrderDetail",
+    "CTriggerOrder", "CGridBidSize", "CGridChannelInfo", "CGridSymbolInfo",
+    "CGridOrdersResponse", "CGridTriggerHistoryResponse",
+    # TradeContext: grid trading push (stays on trade side)
+    "CPushGridOrderChanged",
     "CEstimateMaxPurchaseQuantityResponse",
     "CSecurityCalcIndex",
     "CWarrantInfo",