Add a position history view to demo trading

New GET /api/trading/positions/history lists closed plans (entry filled,
position back to zero) newest first with before/limit paging. Each row
carries the filled quantity, volume-weighted entry and exit prices from
the plan's own fills, the close reason and the realized PnL, commission
and net from the plan result.

The positions panel gets a "历史仓位" button that opens a drawer with the
table, a "load earlier" button and links to each plan's analysis.

backend/src/alphapulse/api/trading.py

@@ -1,6 +1,7 @@
 """模拟盘页：引擎状态、启停、交易币种、时间线。账户和持仓来自 trader 进程写入 Redis 的快照"""
 
 import json
+from collections import defaultdict
 from datetime import datetime, timedelta
 from decimal import Decimal
 from typing import Annotated
@@ -141,6 +142,23 @@ class EventOut(BaseModel):
     data: dict | None
 
 
+class PositionHistoryOut(BaseModel):
+    analysis_id: int
+    symbol: str
+    direction: str
+    opened_at: datetime
+    closed_at: datetime
+    close_reason: str
+    # 本计划的入场成交；计划被替换时持仓由新计划接管，新计划没有自己的入场成交，这两项为空
+    quantity: Decimal | None
+    entry_price: Decimal | None
+    # 止盈、止损、市价平仓的成交均价；外部平仓（如网页手动平仓）没有成交记录，为空
+    exit_price: Decimal | None
+    realized_pnl: Decimal
+    commission: Decimal
+    net: Decimal
+
+
 async def get_account(session: AsyncSession) -> TradingAccount:
     return await session.get(TradingAccount, 1) or TradingAccount(id=1, running=False)
 
@@ -327,6 +345,43 @@ async def list_events(
     return [EventOut.model_validate(e, from_attributes=True) for e in await session.scalars(query)]
 
 
+def average_fill(rows: list[TradingOrder]) -> tuple[Decimal, Decimal] | None:
+    """成交数量与按量加权的均价；没有成交时为空"""
+    qty = sum((r.filled_qty for r in rows), Decimal(0))
+    if not qty:
+        return None
+    return qty, sum((r.filled_qty * r.avg_price for r in rows), Decimal(0)) / qty
+
+
+@router.get("/positions/history")
+async def list_position_history(
+    session: Annotated[AsyncSession, Depends(get_session)],
+    before: int | None = None,
+    limit: Annotated[int, Query(ge=1, le=200)] = 50,
+) -> list[PositionHistoryOut]:
+    """已平仓的计划（入场成交过、持仓已归零），按计划 id 倒序分页；closed 的计划一定有 first_fill_at 和 result"""
+    query = select(TradingAnalysis).where(TradingAnalysis.plan_status == "closed").order_by(TradingAnalysis.id.desc()).limit(limit)
+    if before:
+        query = query.where(TradingAnalysis.id < before)
+    plans = list(await session.scalars(query))
+    fills: dict[int, list[TradingOrder]] = defaultdict(list)
+    for order in await session.scalars(
+        select(TradingOrder).where(TradingOrder.analysis_id.in_([p.id for p in plans]), TradingOrder.filled_qty > 0)
+    ):
+        fills[order.analysis_id].append(order)
+    items = []
+    for plan in plans:
+        entry = average_fill([o for o in fills[plan.id] if o.purpose == "entry"])
+        exit_fill = average_fill([o for o in fills[plan.id] if o.purpose != "entry"])
+        items.append(PositionHistoryOut(
+            analysis_id=plan.id, symbol=plan.symbol, direction=plan.sizing["direction"],
+            opened_at=plan.first_fill_at, closed_at=plan.closed_at, close_reason=plan.close_reason,
+            quantity=entry[0] if entry else None, entry_price=entry[1] if entry else None,
+            exit_price=exit_fill[1] if exit_fill else None, **plan.result,
+        ))
+    return items
+
+
 @router.post("/symbols/{symbol}/analyze", status_code=status.HTTP_202_ACCEPTED)
 async def request_analysis(symbol: str, session: Annotated[AsyncSession, Depends(get_session)]) -> None:
     """排队一次手动分析：引擎停止时为试运行，计划只记录、不下单"""

web/src/apis/trading.ts

@@ -253,6 +253,8 @@ export const CLOSE_REASON_LABELS: Record<string, string> = {
   external: "外部平仓",
   stop_failed: "止损挂单失败",
   close: "市价平仓",
+  // 计划 3.1 之前的旧原因，历史仓位里还会出现
+  invalidation: "短线失效条件触发",
   replaced: "被新计划替换",
   expired: "限价单到期未成交",
   stopped: "已停止交易",
@@ -265,6 +267,28 @@ export const TAKE_PROFIT_STEPS: Record<"long" | "short", [number, number][]> = {
   short: [[0.005, 0.8], [0.0075, 0.2]]
 }
 
+/** 已平仓的仓位：一个计划从首次入场到持仓归零；数值为十进制字符串 */
+export interface PositionHistory {
+  analysis_id: number
+  symbol: string
+  direction: "long" | "short"
+  opened_at: string
+  closed_at: string
+  close_reason: string
+  /** 计划被替换后接管持仓的新计划没有自己的入场成交，为空 */
+  quantity: string | null
+  entry_price: string | null
+  /** 外部平仓没有成交记录，为空 */
+  exit_price: string | null
+  realized_pnl: string
+  commission: string
+  net: string
+}
+
+export function listPositionHistory(params: { before?: number, limit?: number }): Promise<PositionHistory[]> {
+  return http.get("/trading/positions/history", { params })
+}
+
 export function getSymbolPlan(symbol: string): Promise<{ plan: Analysis | null, orders: OrderRow[] }> {
   return http.get(`/trading/symbols/${symbol}/plan`)
 }

web/src/pages/trading/components/PositionHistoryDrawer.vue

@@ -0,0 +1,128 @@
+<script lang="ts" setup>
+import type { PositionHistory } from "@/apis/trading"
+import { CLOSE_REASON_LABELS, listPositionHistory } from "@/apis/trading"
+import { formatTime } from "@/utils/text"
+
+const emit = defineEmits<{ detail: [id: number] }>()
+const visible = defineModel<boolean>({ required: true })
+
+const PAGE = 50
+
+const items = ref<PositionHistory[]>([])
+const exhausted = ref(false)
+const loading = ref(false)
+
+async function load(more = false) {
+  loading.value = true
+  try {
+    const page = await listPositionHistory({ before: more ? items.value.at(-1)?.analysis_id : undefined, limit: PAGE })
+    items.value = more ? [...items.value, ...page] : page
+    exhausted.value = page.length < PAGE
+  } finally {
+    loading.value = false
+  }
+}
+
+watch(visible, (open) => {
+  if (open)
+    load()
+})
+
+/** 均价保留 7 位有效数字，去掉末尾的 0 */
+function price(value: string | null) {
+  return value === null ? "-" : String(Number(Number(value).toPrecision(7)))
+}
+
+function holding(row: PositionHistory) {
+  const seconds = Math.round((new Date(row.closed_at).getTime() - new Date(row.opened_at).getTime()) / 1000)
+  if (seconds < 60)
+    return `${seconds}s`
+  const minutes = Math.round(seconds / 60)
+  return minutes < 60 ? `${minutes}m` : `${Math.floor(minutes / 60)}h ${minutes % 60}m`
+}
+
+function pnlClass(value: string) {
+  const n = Number(value)
+  return n > 0 ? "text-emerald-600" : n < 0 ? "text-rose-600" : ""
+}
+</script>
+
+<template>
+  <el-drawer v-model="visible" title="历史仓位" size="90%">
+    <el-table v-loading="loading" :data="items" cell-class-name="num" empty-text="还没有平仓的仓位">
+      <el-table-column label="币种" min-width="90">
+        <template #default="{ row }">
+          <span class="text-slate-900 font-semibold">{{ row.symbol }}</span>
+        </template>
+      </el-table-column>
+      <el-table-column label="方向" width="76">
+        <template #default="{ row }">
+          <el-tag :type="row.direction === 'long' ? 'success' : 'danger'" size="small">
+            {{ row.direction === "long" ? "↑ 多" : "↓ 空" }}
+          </el-tag>
+        </template>
+      </el-table-column>
+      <el-table-column label="开仓时间" width="126">
+        <template #default="{ row }">
+          {{ formatTime(row.opened_at, "MM-DD HH:mm") }}
+        </template>
+      </el-table-column>
+      <el-table-column label="平仓时间" width="126">
+        <template #default="{ row }">
+          {{ formatTime(row.closed_at, "MM-DD HH:mm") }}
+        </template>
+      </el-table-column>
+      <el-table-column label="持仓时长" width="80">
+        <template #default="{ row }">
+          {{ holding(row as PositionHistory) }}
+        </template>
+      </el-table-column>
+      <el-table-column label="仓位价值（USDT）" min-width="110">
+        <template #default="{ row }">
+          <span v-if="row.quantity" :title="`数量 ${Number(row.quantity)}`">{{ (Number(row.quantity) * Number(row.entry_price)).toFixed(2) }}</span>
+          <span v-else>-</span>
+        </template>
+      </el-table-column>
+      <el-table-column label="开仓均价" min-width="100">
+        <template #default="{ row }">
+          {{ price(row.entry_price) }}
+        </template>
+      </el-table-column>
+      <el-table-column label="平仓均价" min-width="100">
+        <template #default="{ row }">
+          {{ price(row.exit_price) }}
+        </template>
+      </el-table-column>
+      <el-table-column label="平仓原因" min-width="120">
+        <template #default="{ row }">
+          <span class="font-sans">{{ CLOSE_REASON_LABELS[row.close_reason] ?? row.close_reason }}</span>
+        </template>
+      </el-table-column>
+      <el-table-column label="已实现盈亏" min-width="90">
+        <template #default="{ row }">
+          <span :class="pnlClass(row.realized_pnl)">{{ Number(row.realized_pnl).toFixed(2) }}</span>
+        </template>
+      </el-table-column>
+      <el-table-column label="手续费" min-width="70">
+        <template #default="{ row }">
+          <span class="text-slate-500">{{ Number(row.commission).toFixed(2) }}</span>
+        </template>
+      </el-table-column>
+      <el-table-column label="净盈亏" min-width="80">
+        <template #default="{ row }">
+          <b :class="pnlClass(row.net)">{{ Number(row.net).toFixed(2) }}</b>
+        </template>
+      </el-table-column>
+      <el-table-column label="分析" width="80">
+        <template #default="{ row }">
+          <el-link type="primary" underline="never" title="查看这次计划的分析" @click="emit('detail', row.analysis_id)">
+            #{{ row.analysis_id }}
+          </el-link>
+        </template>
+      </el-table-column>
+    </el-table>
+    <el-button v-if="items.length && !exhausted" link type="primary" class="mt-3" :loading="loading" @click="load(true)">
+      加载更早的仓位
+    </el-button>
+  </el-drawer>
+</template>

web/src/pages/trading/index.vue

@@ -1,7 +1,7 @@
 <script lang="ts" setup>
 import type { Effort, Provider } from "@/apis/settings"
 import type { Analysis, OrderRow, SnapshotPosition, TradingEvent, TradingStatus, TradingSymbol } from "@/apis/trading"
-import { Edit, Plus } from "@element-plus/icons-vue"
+import { Clock, Edit, Plus } from "@element-plus/icons-vue"
 import { EFFORTS, listProviders } from "@/apis/settings"
 import { deleteSymbol, getStatus, getSymbolPlan, isOwnOrder, listAnalyses, listEvents, listSymbols, patchConfig, requestAnalysis, startTrading, stopTrading } from "@/apis/trading"
 import { usePersisted } from "@/utils/storage"
@@ -9,6 +9,7 @@ import { formatTime } from "@/utils/text"
 import AddSymbolDialog from "./components/AddSymbolDialog.vue"
 import AnalysisDrawer from "./components/AnalysisDrawer.vue"
 import PlanCard from "./components/PlanCard.vue"
+import PositionHistoryDrawer from "./components/PositionHistoryDrawer.vue"
 
 const STATUS_REFRESH_MS = 3000
 const EVENTS_PAGE = 50
@@ -28,6 +29,7 @@ const planOrders = ref<OrderRow[]>([])
 const requesting = ref(false)
 const drawerVisible = ref(false)
 const drawerAnalysisId = ref<number | null>(null)
+const historyVisible = ref(false)
 
 const snapshot = computed(() => status.value?.snapshot ?? null)
 const account = computed(() => snapshot.value?.account ?? null)
@@ -373,7 +375,12 @@ onBeforeUnmount(() => clearInterval(timer))
     <!-- 持仓 -->
     <el-card shadow="never" body-class="p-0">
       <template #header>
-        持仓（{{ positions.length }}）
+        <div class="flex items-center justify-between">
+          持仓（{{ positions.length }}）
+          <el-button link type="primary" :icon="Clock" @click="historyVisible = true">
+            历史仓位
+          </el-button>
+        </div>
       </template>
       <el-table :data="positions" empty-text="没有持仓" cell-class-name="num">
         <el-table-column label="币种" min-width="120">
@@ -563,6 +570,7 @@ onBeforeUnmount(() => clearInterval(timer))
     </div>
 
     <AddSymbolDialog v-model="addVisible" @added="onAdded" />
+    <PositionHistoryDrawer v-model="historyVisible" @detail="openAnalysis" />
     <AnalysisDrawer v-model="drawerVisible" :analysis-id="drawerAnalysisId" />
   </div>
 </template>