diff --git a/frontend/src/api/live.ts b/frontend/src/api/live.ts
index feb1f11..50aca53 100644
--- a/frontend/src/api/live.ts
+++ b/frontend/src/api/live.ts
@@ -124,3 +124,21 @@ export async function getLiveStatus(aid: number): Promise<LiveStatus> {
   const { data } = await apiClient.get<LiveStatus>(`/live/${aid}/status`)
   return data
 }
+
+export async function deleteLive(aid: number): Promise<{ account_id: number; deleted: boolean }> {
+  const { data } = await apiClient.delete(`/live/${aid}`)
+  return data
+}
+
+export interface LiveUpdateReq {
+  name?: string
+  account?: string
+  vt_symbol?: string
+  strategy_name?: string
+  interval?: string
+}
+
+export async function updateLive(aid: number, req: LiveUpdateReq): Promise<{ updated: boolean }> {
+  const { data } = await apiClient.put(`/live/${aid}`, req)
+  return data
+}
diff --git a/frontend/src/api/paper.ts b/frontend/src/api/paper.ts
index b3ecc15..e67a12b 100644
--- a/frontend/src/api/paper.ts
+++ b/frontend/src/api/paper.ts
@@ -124,3 +124,29 @@ export async function getPending(aid: number): Promise<PendingOrder[]> {
   const { data } = await apiClient.get<PendingOrder[]>(`/paper/${aid}/pending`)
   return data
 }
+
+export async function stopPaper(aid: number): Promise<{ account_id: number; status: string }> {
+  const { data } = await apiClient.post(`/paper/${aid}/stop`)
+  return data
+}
+
+export async function resumePaper(aid: number): Promise<{ account_id: number; status: string }> {
+  const { data } = await apiClient.post(`/paper/${aid}/resume`)
+  return data
+}
+
+export async function deletePaper(aid: number): Promise<{ account_id: number; deleted: boolean }> {
+  const { data } = await apiClient.delete(`/paper/${aid}`)
+  return data
+}
+
+export interface PaperUpdateReq {
+  name?: string
+  symbols?: string[]
+  initial_capital?: number
+}
+
+export async function updatePaper(aid: number, req: PaperUpdateReq): Promise<{ updated: boolean }> {
+  const { data } = await apiClient.put(`/paper/${aid}`, req)
+  return data
+}
diff --git a/frontend/src/views/live/List.vue b/frontend/src/views/live/List.vue
index 401c2b2..a05fa31 100644
--- a/frontend/src/views/live/List.vue
+++ b/frontend/src/views/live/List.vue
@@ -2,8 +2,11 @@
 import { ref, computed, onMounted, onUnmounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
+import { ref, reactive, computed, onMounted, onUnmounted } from 'vue'
+import { useRouter } from 'vue-router'
+import { ElMessage, ElMessageBox } from 'element-plus'
 import {
-  listLives, startLive, stopLive,
+  listLives, startLive, stopLive, deleteLive, updateLive,
   type LiveAccount,
 } from '@/api/live'
 
@@ -73,6 +76,51 @@ function goNew(): void {
   router.push('/live/new')
 }
 
+async function onDelete(a: LiveAccount): Promise<void> {
+  try {
+    await ElMessageBox.confirm(
+      `删除实盘实例 #${a.id}（${a.name}）？成交/持仓/余额数据将一并删除，不可恢复。`,
+      '删除确认',
+      { type: 'warning' },
+    )
+  } catch {
+    return
+  }
+  actionLoading.value = a.id
+  try {
+    await deleteLive(a.id)
+    ElMessage.success(`#${a.id} 已删除`)
+    await refreshSilent()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '删除失败')
+  } finally {
+    actionLoading.value = null
+  }
+}
+
+// 编辑（仅 stopped 可改；后端运行中会 400）
+const editVisible = ref(false)
+const editForm = reactive({ id: 0, name: '', account: '', vt_symbol: '', strategy_name: '', interval: '' })
+function openEdit(a: LiveAccount): void {
+  editForm.id = a.id
+  editForm.name = a.name
+  editForm.account = a.account
+  editForm.vt_symbol = a.vt_symbol
+  editForm.strategy_name = a.strategy_name
+  editForm.interval = a.interval
+  editVisible.value = true
+}
+async function saveEdit(): Promise<void> {
+  try {
+    await updateLive(editForm.id, { ...editForm })
+    ElMessage.success(`#${editForm.id} 已更新`)
+    editVisible.value = false
+    await refreshSilent()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '更新失败')
+  }
+}
+
 async function onStart(a: LiveAccount): Promise<void> {
   actionLoading.value = a.id
   try {
@@ -178,7 +226,7 @@ async function onStop(a: LiveAccount): Promise<void> {
             </span>
           </template>
         </el-table-column>
-        <el-table-column label="操作" width="180">
+        <el-table-column label="操作" width="240">
           <template #default="{ row }">
             <el-button
               v-if="row.status !== 'running'"
@@ -193,10 +241,26 @@ async function onStop(a: LiveAccount): Promise<void> {
               @click="onStop(row)"
             >停止</el-button>
             <el-button link type="primary" size="small" @click="goMonitor(row)">监控</el-button>
+            <el-button v-if="row.status !== 'running'" link type="primary" size="small" @click="openEdit(row)">编辑</el-button>
+            <el-button v-if="row.status !== 'running'" link type="danger" size="small" :loading="actionLoading === row.id" @click="onDelete(row)">删除</el-button>
           </template>
         </el-table-column>
       </el-table>
     </el-card>
+
+    <el-dialog v-model="editVisible" title="编辑实盘实例" width="480px">
+      <el-form :model="editForm" label-width="90px">
+        <el-form-item label="名称"><el-input v-model="editForm.name" /></el-form-item>
+        <el-form-item label="交易账号"><el-input v-model="editForm.account" /></el-form-item>
+        <el-form-item label="标的"><el-input v-model="editForm.vt_symbol" /></el-form-item>
+        <el-form-item label="策略实例名"><el-input v-model="editForm.strategy_name" /></el-form-item>
+        <el-form-item label="频率"><el-input v-model="editForm.interval" /></el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="editVisible = false">取消</el-button>
+        <el-button type="primary" @click="saveEdit">保存</el-button>
+      </template>
+    </el-dialog>
   </div>
 </template>
 
diff --git a/frontend/src/views/paper/List.vue b/frontend/src/views/paper/List.vue
index c227961..db3830e 100644
--- a/frontend/src/views/paper/List.vue
+++ b/frontend/src/views/paper/List.vue
@@ -1,8 +1,11 @@
 <script setup lang="ts">
-import { ref, computed, onMounted } from 'vue'
+import { ref, reactive, computed, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
-import { ElMessage } from 'element-plus'
-import { listPapers, type PaperAccount } from '@/api/paper'
+import { ElMessage, ElMessageBox } from 'element-plus'
+import {
+  listPapers, stopPaper, resumePaper, deletePaper, updatePaper,
+  type PaperAccount,
+} from '@/api/paper'
 
 const router = useRouter()
 const accounts = ref<PaperAccount[]>([])
@@ -10,6 +13,7 @@ const loading = ref(false)
 const kw = ref('')
 const modeFilter = ref('')
 const statusFilter = ref('')
+const actionLoading = ref(0)
 
 onMounted(refresh)
 
@@ -62,6 +66,84 @@ function open(a: PaperAccount): void {
 function goNew(): void {
   router.push('/paper/new')
 }
+
+async function onStop(a: PaperAccount): Promise<void> {
+  actionLoading.value = a.id
+  try {
+    await stopPaper(a.id)
+    ElMessage.success(`#${a.id} 已停止，今晚起不再结算`)
+    await refresh()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '停止失败')
+  } finally {
+    actionLoading.value = 0
+  }
+}
+
+async function onResume(a: PaperAccount): Promise<void> {
+  actionLoading.value = a.id
+  try {
+    await resumePaper(a.id)
+    ElMessage.success(`#${a.id} 已恢复，今晚 20:30 起继续结算`)
+    await refresh()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '恢复失败')
+  } finally {
+    actionLoading.value = 0
+  }
+}
+
+async function onDelete(a: PaperAccount): Promise<void> {
+  try {
+    await ElMessageBox.confirm(
+      `删除模拟盘 #${a.id}（${a.name}）？净值/成交/持仓数据将一并删除，不可恢复。`,
+      '删除确认',
+      { type: 'warning' },
+    )
+  } catch {
+    return
+  }
+  actionLoading.value = a.id
+  try {
+    await deletePaper(a.id)
+    ElMessage.success(`#${a.id} 已删除`)
+    await refresh()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '删除失败')
+  } finally {
+    actionLoading.value = 0
+  }
+}
+
+// 编辑（MVP：名称/标的/初始资金）
+const editVisible = ref(false)
+const editForm = reactive({ id: 0, name: '', symbols: '', initial_capital: 0 })
+function openEdit(a: PaperAccount): void {
+  editForm.id = a.id
+  editForm.name = a.name
+  const syms: string = typeof a.symbols === 'string' ? a.symbols : JSON.stringify(a.symbols ?? [])
+  try {
+    editForm.symbols = (JSON.parse(syms) as string[]).join(',')
+  } catch {
+    editForm.symbols = syms
+  }
+  editForm.initial_capital = a.initial_capital
+  editVisible.value = true
+}
+async function saveEdit(): Promise<void> {
+  try {
+    await updatePaper(editForm.id, {
+      name: editForm.name,
+      symbols: editForm.symbols.split(',').map((s) => s.trim()).filter(Boolean),
+      initial_capital: Number(editForm.initial_capital),
+    })
+    ElMessage.success(`#${editForm.id} 已更新（策略参数自下次结算生效）`)
+    editVisible.value = false
+    await refresh()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '更新失败')
+  }
+}
 </script>
 
 <template>
@@ -131,11 +213,43 @@ function goNew(): void {
         <el-table-column label="状态" width="84">
           <template #default="{ row }"><span class="chip" :class="`st-${row.status}`">{{ statusLabel[row.status] || row.status }}</span></template>
         </el-table-column>
-        <el-table-column label="操作" width="76">
-          <template #default="{ row }"><el-button link type="primary" @click="open(row)">查看</el-button></template>
+        <el-table-column label="操作" width="200" fixed="right">
+          <template #default="{ row }">
+            <el-button link type="primary" @click="open(row)">查看</el-button>
+            <el-button
+              v-if="row.mode === 'live' && row.status === 'running'"
+              link type="warning" :loading="actionLoading === row.id"
+              @click="onStop(row)"
+            >停止</el-button>
+            <el-button
+              v-if="row.mode === 'live' && row.status === 'stopped'"
+              link type="success" :loading="actionLoading === row.id"
+              @click="onResume(row)"
+            >恢复</el-button>
+            <el-button link type="primary" @click="openEdit(row)">编辑</el-button>
+            <el-button link type="danger" :loading="actionLoading === row.id" @click="onDelete(row)">删除</el-button>
+          </template>
         </el-table-column>
       </el-table>
     </el-card>
+
+    <el-dialog v-model="editVisible" title="编辑模拟盘" width="480px">
+      <el-form :model="editForm" label-width="90px">
+        <el-form-item label="名称">
+          <el-input v-model="editForm.name" />
+        </el-form-item>
+        <el-form-item label="标的">
+          <el-input v-model="editForm.symbols" placeholder="逗号分隔" />
+        </el-form-item>
+        <el-form-item label="初始资金">
+          <el-input-number v-model="editForm.initial_capital" :min="10000" :step="100000" :controls="false" style="width: 200px" />
+        </el-form-item>
+      </el-form>
+      <template #footer>
+        <el-button @click="editVisible = false">取消</el-button>
+        <el-button type="primary" @click="saveEdit">保存</el-button>
+      </template>
+    </el-dialog>
   </div>
 </template>
 
diff --git a/frontend/src/views/paper/Result.vue b/frontend/src/views/paper/Result.vue
index e021bf4..a9f2619 100644
--- a/frontend/src/views/paper/Result.vue
+++ b/frontend/src/views/paper/Result.vue
@@ -1,8 +1,9 @@
 <script setup lang="ts">
 import { ref, computed, onMounted, onUnmounted } from 'vue'
 import { useRoute, useRouter } from 'vue-router'
+import { ElMessage } from 'element-plus'
 import {
-  getPaper, getEquity, getTrades, getStrategies,
+  getPaper, getEquity, getTrades, getStrategies, stopPaper, resumePaper,
   type BalancePoint, type PaperTrade, type StrategySummary, type PaperAccount,
 } from '@/api/paper'
 import type { EquityPoint } from '@/api/backtest'
@@ -105,6 +106,32 @@ function rowClass({ row }: { row: PaperTrade }): string {
 function toLive(): void {
   router.push(`/paper/live/${aid}`)
 }
+
+const lifecycleBusy = ref(false)
+async function onStop(): Promise<void> {
+  lifecycleBusy.value = true
+  try {
+    await stopPaper(aid)
+    ElMessage.success('已停止，今晚起不再结算')
+    await load()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '停止失败')
+  } finally {
+    lifecycleBusy.value = false
+  }
+}
+async function onResume(): Promise<void> {
+  lifecycleBusy.value = true
+  try {
+    await resumePaper(aid)
+    ElMessage.success('已恢复，今晚 20:30 起继续结算')
+    await load()
+  } catch (e: unknown) {
+    ElMessage.error(e instanceof Error ? e.message : '恢复失败')
+  } finally {
+    lifecycleBusy.value = false
+  }
+}
 </script>
 
 <template>
@@ -124,6 +151,14 @@ function toLive(): void {
             ? '实走中 · 每日 20:30 结算'
             : statusLabel(account.status)
         }}</span>
+        <el-button
+          v-if="account?.mode === 'live' && account.status === 'running'"
+          type="warning" :loading="lifecycleBusy" @click="onStop"
+        >停止</el-button>
+        <el-button
+          v-if="account?.mode === 'live' && account.status === 'stopped'"
+          type="success" :loading="lifecycleBusy" @click="onResume"
+        >恢复</el-button>
         <el-button v-if="account?.mode === 'live'" type="primary" @click="toLive">实走监控 →</el-button>
       </div>
     </div>
diff --git a/sanguo_api/routes_live.py b/sanguo_api/routes_live.py
index 1686af2..eb8c56b 100644
--- a/sanguo_api/routes_live.py
+++ b/sanguo_api/routes_live.py
@@ -176,3 +176,69 @@ def get_status(aid: int):
         "strategy_name": acc["strategy_name"], "updated_at": acc["updated_at"],
         "error_msg": acc.get("error_msg", ""),
     }
+
+
+# ===== 生命周期管理补全：删除/编辑（停止/启动已有）=====
+
+class LiveUpdateRequest(BaseModel):
+    """可编辑字段。仅 stopped 状态可改（运行中改配置会与 engine 失配）。"""
+    name: str | None = None
+    account: str | None = None
+    vt_symbol: str | None = None
+    strategy_class: str | None = None
+    strategy_name: str | None = None
+    setting: dict | None = None
+    interval: str | None = None
+
+
+@router.put("/live/{aid}", dependencies=[Depends(verify_token)])
+def update_live(aid: int, req: LiveUpdateRequest):
+    import json
+    import sqlite3
+
+    from sanguo_live.persistence import get_account
+
+    db = _db_path["path"]
+    acc = get_account(db, aid)
+    if not acc:
+        raise HTTPException(404, "account not found")
+    if acc["status"] == "running":
+        raise HTTPException(400, "运行中不可编辑，请先停止实例")
+    sets, args = [], []
+    field_map = {
+        "name": req.name, "account": req.account, "vt_symbol": req.vt_symbol,
+        "strategy_class": req.strategy_class, "strategy_name": req.strategy_name,
+        "interval": req.interval,
+    }
+    for col, v in field_map.items():
+        if v is not None:
+            sets.append(f"{col}=?"); args.append(v)
+    if req.setting is not None:
+        sets.append("setting=?"); args.append(json.dumps(req.setting))
+    if not sets:
+        return {"account_id": aid, "updated": False}
+    with sqlite3.connect(db) as conn:
+        conn.execute(f"UPDATE live_accounts SET {', '.join(sets)} WHERE id=?", (*args, aid))
+        conn.commit()
+    return {"account_id": aid, "updated": True}
+
+
+@router.delete("/live/{aid}", dependencies=[Depends(verify_token)])
+def delete_live(aid: int):
+    """删除实盘实例及其数据。运行中拒绝删除（先 stop）。"""
+    import sqlite3
+
+    from sanguo_live.persistence import get_account
+
+    db = _db_path["path"]
+    acc = get_account(db, aid)
+    if not acc:
+        raise HTTPException(404, "account not found")
+    if acc["status"] == "running":
+        raise HTTPException(400, "运行中不可删除，请先停止实例")
+    with sqlite3.connect(db) as conn:
+        conn.execute("DELETE FROM live_accounts WHERE id=?", (aid,))
+        for t in ("live_trades", "live_positions", "live_balance"):
+            conn.execute(f"DELETE FROM {t} WHERE account_id=?", (aid,))
+        conn.commit()
+    return {"account_id": aid, "deleted": True}
diff --git a/sanguo_api/routes_paper.py b/sanguo_api/routes_paper.py
index 3cdac66..5b2d401 100644
--- a/sanguo_api/routes_paper.py
+++ b/sanguo_api/routes_paper.py
@@ -4,6 +4,7 @@ create 建 paper_account（持久化配置）；GET 查询净值/成交/状态
 回放执行（engine.run）由 orchestrator 异步触发或容器内同步跑，端到端冒烟在容器
 （本机无 NAS parquet + vnpy 完整依赖），本模块只做 account 管理 + 查询。
 """
+import json
 import sqlite3
 
 from fastapi import APIRouter, Depends, Header, HTTPException
@@ -164,6 +165,90 @@ def get_pending(aid: int):
     return load_pending_orders(_db_path["path"], aid)
 
 
+# ===== 生命周期管理（spec §10 补全：停止/恢复/删除/编辑）=====
+
+def _get_account_row(db, aid: int) -> dict:
+    with sqlite3.connect(db) as conn:
+        conn.row_factory = sqlite3.Row
+        row = conn.execute("SELECT * FROM paper_accounts WHERE id=?", (aid,)).fetchone()
+    if not row:
+        raise HTTPException(404, "account not found")
+    return dict(row)
+
+
+@router.post("/paper/{aid}/stop", dependencies=[Depends(verify_token)])
+def stop_paper(aid: int):
+    """停止实走：置 status=stopped，每日 20:30 全局 step 只选 running → 自动跳过。"""
+    from sanguo_trader.persistence import update_account_status
+
+    db = _db_path["path"]
+    acc = _get_account_row(db, aid)
+    if acc.get("mode") != "live":
+        raise HTTPException(400, "仅实走(live)账户支持停止；回放账户为一次性任务")
+    update_account_status(db, aid, "stopped")
+    return {"account_id": aid, "status": "stopped"}
+
+
+@router.post("/paper/{aid}/resume", dependencies=[Depends(verify_token)])
+def resume_paper(aid: int):
+    """恢复实走：次日 20:30 起继续 step。"""
+    from sanguo_trader.persistence import update_account_status
+
+    db = _db_path["path"]
+    acc = _get_account_row(db, aid)
+    if acc.get("mode") != "live":
+        raise HTTPException(400, "仅实走(live)账户支持恢复")
+    update_account_status(db, aid, "running")
+    return {"account_id": aid, "status": "running"}
+
+
+@router.delete("/paper/{aid}", dependencies=[Depends(verify_token)])
+def delete_paper(aid: int):
+    """删除模拟盘账户及其全部数据（净值/成交/持仓/挂单，不可恢复）。"""
+    db = _db_path["path"]
+    _get_account_row(db, aid)
+    tables = ("paper_accounts", "paper_daily_balance", "paper_trades",
+              "paper_positions", "paper_pending_orders", "paper_shadow_orders")
+    with sqlite3.connect(db) as conn:
+        for t in tables:
+            if t == "paper_accounts":
+                conn.execute("DELETE FROM paper_accounts WHERE id=?", (aid,))
+            else:
+                conn.execute(f"DELETE FROM {t} WHERE account_id=?", (aid,))
+        conn.commit()
+    return {"account_id": aid, "deleted": True}
+
+
+class PaperUpdateRequest(BaseModel):
+    """可编辑字段（其余字段沿用原值；策略参数/标的改动自下次 step 生效）。"""
+    name: str | None = None
+    symbols: list[str] | None = None
+    strategies: list[StrategyCfg] | None = None
+    initial_capital: float | None = None
+
+
+@router.put("/paper/{aid}", dependencies=[Depends(verify_token)])
+def update_paper(aid: int, req: PaperUpdateRequest):
+    db = _db_path["path"]
+    _get_account_row(db, aid)
+    sets, args = [], []
+    if req.name is not None:
+        sets.append("name=?"); args.append(req.name)
+    if req.symbols is not None:
+        sets.append("symbols=?"); args.append(json.dumps(req.symbols))
+    if req.strategies is not None:
+        sets.append("strategies=?")
+        args.append(json.dumps([s.model_dump() for s in req.strategies]))
+    if req.initial_capital is not None:
+        sets.append("initial_capital=?"); args.append(req.initial_capital)
+    if not sets:
+        return {"account_id": aid, "updated": False}
+    with sqlite3.connect(db) as conn:
+        conn.execute(f"UPDATE paper_accounts SET {', '.join(sets)} WHERE id=?", (*args, aid))
+        conn.commit()
+    return {"account_id": aid, "updated": True}
+
+
 class _DataSourceWrapper:
     """包装 iter_bars/fetch_day 给 PaperEngine/live_orchestrator。"""
 
diff --git a/tests/api/test_paper_lifecycle.py b/tests/api/test_paper_lifecycle.py
new file mode 100644
index 0000000..33f7c18
--- /dev/null
+++ b/tests/api/test_paper_lifecycle.py
@@ -0,0 +1,72 @@
+"""paper/live 生命周期 API 单测（D1）：stop/resume/delete/update 直调路由函数。"""
+import pytest
+
+from sanguo_api import routes_paper as rp
+
+
+@pytest.fixture()
+def paper_db(tmp_path):
+    db = str(tmp_path / "paper.db")
+    rp.set_db_path(db)
+    return db
+
+
+def _create(paper_db, mode="live", name="p1"):
+    req = rp.PaperCreateRequest(
+        mode=mode, symbols=["600000"],
+        strategies=[rp.StrategyCfg(name="DoubleMaStrategy", symbol="600000")],
+        start="2026-01-01", end="2026-12-31", name=name,
+    )
+    # 直接走 save_account（绕过 create 的后台线程/引擎依赖）
+    from sanguo_trader.persistence import save_account, update_account_status
+    aid = save_account(paper_db, req.model_dump())
+    if mode == "live":
+        update_account_status(paper_db, aid, "running")
+    return aid
+
+
+def test_stop_resume_live(paper_db):
+    aid = _create(paper_db, mode="live")
+    assert rp.stop_paper(aid)["status"] == "stopped"
+    assert rp.resume_paper(aid)["status"] == "running"
+
+
+def test_stop_replay_rejected(paper_db):
+    aid = _create(paper_db, mode="replay")
+    with pytest.raises(Exception):
+        rp.stop_paper(aid)
+
+
+def test_stop_unknown_404(paper_db):
+    with pytest.raises(Exception):
+        rp.stop_paper(999)
+
+
+def test_delete_removes_all_tables(paper_db):
+    aid = _create(paper_db, mode="live")
+    import sqlite3
+    from sanguo_trader.persistence import save_daily_balance, save_trade
+    save_daily_balance(paper_db, aid, "2026-08-13", 100.0, 0.0, 100.0)
+    save_trade(paper_db, aid, {"strategy_id": "s", "datetime": "2026-08-13",
+                               "symbol": "600000", "direction": "long",
+                               "offset": "open", "match_session": "next_open",
+                               "price": 10.0, "volume": 100})
+    assert rp.delete_paper(aid)["deleted"] is True
+    with sqlite3.connect(paper_db) as conn:
+        for t in ("paper_accounts", "paper_daily_balance", "paper_trades"):
+            n = conn.execute(f"SELECT COUNT(*) FROM {t}").fetchone()[0]
+            assert n == 0, t
+
+
+def test_update_fields(paper_db):
+    aid = _create(paper_db, mode="live")
+    req = rp.PaperUpdateRequest(name="renamed", initial_capital=2_000_000)
+    assert rp.update_paper(aid, req)["updated"] is True
+    acc = rp.get_paper(aid)
+    assert acc["name"] == "renamed"
+    assert acc["initial_capital"] == 2_000_000
+
+
+def test_update_noop(paper_db):
+    aid = _create(paper_db, mode="live")
+    assert rp.update_paper(aid, rp.PaperUpdateRequest())["updated"] is False