fix(backtest): 结果页指标全显"—" + 任务重启后404

两个根因:

1. relative_metrics 缺字段(routes.py): get_result 的 relative_fields 列表
   漏了 total_return/annual_return/sharpe_ratio/max_drawdown 4 个字段, 导致
   这 4 个指标永远进不了响应 → 前端 MetricCards 显"—"。补全为 11 字段。

2. 任务 task_id 不持久(runner/cta_engine): submit_cta 用 cta_{symbol}_{id(params)}
   (内存地址) 作 runner id, 而 run_cta_backtest 内部另生成 cta_{uuid} 存 DB,
   两者持久层不相交 → 重启后 pool 内存映射丢失, get_result(runner_id) 的
   load_result_by_task_id 查不到 → /result 404 → 前端指标全 0 + 图表无数据。
   改为 submit 前置生成稳定 uuid, 透传给 run_cta_backtest 复用, 使
   runner-id == DB task_id (单一 id, 重启可查)。

附: Dashboard 最近任务"策略/因子"列 min-width 150→190(长策略名不再截断)
测试: test_runner task_id 断言同步新格式

frontend/src/views/Dashboard.vue

@@ -108,7 +108,7 @@ function statusLabel(s: string): string {
         <el-table-column label="类型" width="84">
           <template #default="{ row }"><span class="chip" :class="`chip-${row.type}`">{{ typeLabel(row.type) }}</span></template>
         </el-table-column>
-        <el-table-column prop="strategy" label="策略 / 因子" min-width="150" show-overflow-tooltip />
+        <el-table-column prop="strategy" label="策略 / 因子" min-width="190" show-overflow-tooltip />
         <el-table-column prop="symbol" label="标的" width="90" />
         <el-table-column label="状态" width="84">
           <template #default="{ row }"><span class="chip" :class="`st-${row.status}`">{{ statusLabel(row.status) }}</span></template>

sanguo_api/routes.py

@@ -139,8 +139,9 @@ def get_result(task_id: str):
     # Extract relative metrics from statistics
     relative_metrics = {}
     relative_fields = [
+        "total_return", "annual_return", "sharpe_ratio", "max_drawdown",
         "alpha", "beta", "sortino_ratio", "information_ratio",
-        "annual_volatility", "benchmark_return", "benchmark_volatility"
+        "annual_volatility", "benchmark_return", "benchmark_volatility",
     ]
     for field in relative_fields:
         if field in r.statistics:

sanguo_backtest/cta_engine.py

@@ -48,7 +48,7 @@ def guess_exchange(symbol: str) -> Exchange:
     return Exchange("SSE")
 
 
-def run_cta_backtest(strategy_class, symbol: str, params: dict, start: str, end: str, cfg, db_path: str, benchmark: str = "hs300") -> BacktestResult:
+def run_cta_backtest(strategy_class, symbol: str, params: dict, start: str, end: str, cfg, db_path: str, benchmark: str = "hs300", task_id: str | None = None) -> BacktestResult:
     """
     Run CTA strategy backtest using vnpy_ctastrategy BacktestingEngine.
 
@@ -60,11 +60,15 @@ def run_cta_backtest(strategy_class, symbol: str, params: dict, start: str, end:
         end: Backtest end date (YYYY-MM-DD format)
         cfg: Configuration object (may contain data paths)
         db_path: SQLite database path for saving results
+        benchmark: Benchmark code (hs300/zz500)
+        task_id: Optional task ID from runner (reused as the persisted task_id so
+            runner-id == DB task_id; if omitted a fresh uuid is generated).
 
     Returns:
         BacktestResult: Result object with backtest statistics and status
     """
-    # Generate unique task ID
+    # Use runner-provided task_id (durable, single id across pool/DB/URL) or generate
+    if not task_id:
         task_id = f"cta_{uuid.uuid4().hex[:8]}"
 
     try:

sanguo_orchestrator/runner.py

@@ -3,6 +3,7 @@ Orchestrator for task coordination and execution
 Manages backtesting tasks with lazy imports
 """
 import asyncio
+import uuid
 from concurrent.futures import Future
 from .pool import TaskPool
 from .task import TaskState
@@ -32,7 +33,9 @@ class Orchestrator:
     async def submit_cta(self, strategy_class, symbol: str, params: dict,
                        start: str, end: str, cfg, benchmark: str = "hs300") -> str:
         """Submit a CTA backtesting task asynchronously"""
-        task_id = f"cta_{symbol}_{id(params)}"
+        # Stable uuid up front → reused as the persisted DB task_id, so runner-id ==
+        # DB task_id (durable across restarts; previously used id(params) memory addr).
+        task_id = f"cta_{uuid.uuid4().hex[:8]}"
         self.pool.submit(task_id, "cta")
         self._pending[task_id] = dict(
             strategy_class=strategy_class,
@@ -48,7 +51,7 @@ class Orchestrator:
         spec = self._pending[task_id]
         fut: Future = self.pool.submit_work(
             task_id, _cta_worker, spec["strategy_class"], spec["symbol"],
-            spec["params"], spec["start"], spec["end"], spec["cfg"], spec["benchmark"], self.db_path
+            spec["params"], spec["start"], spec["end"], spec["cfg"], spec["benchmark"], self.db_path, task_id
         )
 
         task = self.pool.get_task(task_id)
@@ -165,10 +168,10 @@ class Orchestrator:
 
 
 # Module-level worker functions (must be top-level for ProcessPoolExecutor pickle)
-def _cta_worker(strategy_class, symbol: str, params: dict, start: str, end: str, cfg, benchmark: str, db_path: str) -> any:
+def _cta_worker(strategy_class, symbol: str, params: dict, start: str, end: str, cfg, benchmark: str, db_path: str, task_id: str) -> any:
     """Worker for CTA backtest (lazy import, spawn-friendly)"""
     from sanguo_backtest.cta_engine import run_cta_backtest
-    return run_cta_backtest(strategy_class, symbol, params, start, end, cfg, db_path, benchmark=benchmark)
+    return run_cta_backtest(strategy_class, symbol, params, start, end, cfg, db_path, benchmark=benchmark, task_id=task_id)
 
 
 def _opt_worker(strategy_class, symbol: str, grid: dict, start: str, end: str, cfg, db_path: str) -> any:

tests/orchestrator/test_runner.py

@@ -52,7 +52,9 @@ class TestOrchestrator:
         assert orchestrator._pending[task_id]["end"] == end
         assert orchestrator._pending[task_id]["cfg"] == cfg
 
-        assert task_id.startswith("cta_AAPL_")
+        # Durable uuid format: cta_<8hex> (reused as persisted DB task_id)
+        assert task_id.startswith("cta_")
+        assert task_id != "cta_AAPL_" and len(task_id) == len("cta_") + 8
 
     @patch('sanguo_orchestrator.runner.TaskPool')
     def test_get_status(self, mock_pool_class):
@@ -144,7 +146,7 @@ class TestOrchestratorAsync:
                 Mock(), "600000", {}, "2024-01-01", "2024-06-30", cfg=Mock()
             )
 
-        assert task_id.startswith("cta_600000")
+        assert task_id.startswith("cta_") and len(task_id) == len("cta_") + 8
         orchestrator.pool.executor.submit.assert_called_once()
 
     @pytest.mark.asyncio