Support selectable demo exchanges and configurable analysis limits

Persist manual requests until exchange confirmation, preserve stop protection, and reconcile fills before settling plans. Tighten model stream, crawler, skill, research accounting, and frontend race handling, with regression coverage. Keep queued analyses pending until a fresh account snapshot is available.

web/src/pages/settings/index.vue

@@ -1,5 +1,5 @@
 <script lang="ts" setup>
-import type { Exchange, Provider, ProviderForm } from "@/apis/settings"
+import type { Exchange, ExchangeName, Provider, ProviderForm } from "@/apis/settings"
 import { Plus } from "@element-plus/icons-vue"
 import { createProvider, deleteExchange, deleteProvider, EFFORTS, getExchange, listProviders, patchProvider, putExchange, testExchange, testProvider } from "@/apis/settings"
 import { formatTime } from "@/utils/text"
@@ -78,7 +78,7 @@ async function test(p: Provider) {
 
 load()
 
-// ---------- 币安模拟盘 ----------
+// ---------- 模拟盘 ----------
 
 const exchange = ref<Exchange>()
 const exchangeDialogVisible = ref(false)
@@ -90,6 +90,16 @@ async function loadExchange() {
   exchange.value = await getExchange()
 }
 
+async function changeExchange(value: ExchangeName) {
+  exchangeSaving.value = true
+  try {
+    exchange.value = await putExchange({ exchange: value })
+    ElMessage.success("已切换模拟盘，另一家交易所的凭证和历史记录仍保留")
+  } finally {
+    exchangeSaving.value = false
+  }
+}
+
 function openExchangeEdit() {
   exchangeForm.value = { api_key: "", api_secret: "" }
   exchangeDialogVisible.value = true
@@ -98,7 +108,7 @@ function openExchangeEdit() {
 async function saveExchange() {
   exchangeSaving.value = true
   try {
-    exchange.value = await putExchange(exchangeForm.value)
+    exchange.value = await putExchange({ exchange: exchange.value?.exchange, ...exchangeForm.value })
     exchangeDialogVisible.value = false
     ElMessage.success("已保存")
   } finally {
@@ -253,8 +263,15 @@ loadExchange()
       <template #header>
         <div class="flex items-center justify-between">
           <div>
-            币安模拟盘
-            <span class="ml-3 text-xs text-slate-500 font-normal">只连接币安模拟盘（demo-fapi.binance.com）；在 demo.binance.com 的 API 管理创建 key，并开启合约交易权限</span>
+            模拟盘交易所
+            <el-select :model-value="exchange?.exchange" class="ml-3 w-36" :disabled="exchange?.running || exchangeSaving" @update:model-value="changeExchange">
+              <el-option value="binance" label="币安模拟盘" />
+              <el-option value="bybit" label="Bybit 模拟盘" />
+            </el-select>
+            <div class="mt-2 text-xs text-slate-500 font-normal">
+              {{ exchange?.exchange === "bybit" ? "在 Bybit 主站切换到模拟交易后创建 API Key，并开启合约交易权限；实盘和 Testnet 的 Key 不可用。" : "在 demo.binance.com 的 API 管理创建 Key，并开启合约交易权限。" }}
+              两家凭证分别保存；切换不会撤销原交易所的挂单，旧挂单仍须在原平台处理。
+            </div>
           </div>
           <div>
             <el-button :disabled="!exchange?.configured" :loading="exchangeTesting" @click="runExchangeTest">
@@ -285,7 +302,7 @@ loadExchange()
       </el-descriptions>
     </el-card>
 
-    <el-dialog v-model="exchangeDialogVisible" title="币安模拟盘 API key" width="560px">
+    <el-dialog v-model="exchangeDialogVisible" :title="`${exchange?.exchange === 'bybit' ? 'Bybit' : '币安'}模拟盘 API Key`" width="560px">
       <el-form :model="exchangeForm" label-width="100px">
         <el-form-item label="API Key" required>
           <el-input v-model="exchangeForm.api_key" type="password" show-password autocomplete="new-password" />