feat: signal history list + always compute scoring even without signal

backend/main.py

@@ -461,6 +461,23 @@ async def get_market_indicators(user: dict = Depends(get_current_user)):
     return result
 
 
+@app.get("/api/signals/history")
+async def get_signal_history(
+    symbol: str = "BTC",
+    limit: int = 50,
+    user: dict = Depends(get_current_user),
+):
+    """返回最近的信号历史（只返回有信号的记录）"""
+    sym_full = symbol.upper() + "USDT"
+    rows = await async_fetch(
+        "SELECT ts, score, signal FROM signal_indicators "
+        "WHERE symbol = $1 AND signal IS NOT NULL "
+        "ORDER BY ts DESC LIMIT $2",
+        sym_full, limit
+    )
+    return {"symbol": symbol, "count": len(rows), "data": rows}
+
+
 @app.get("/api/signals/trades")
 async def get_signal_trades(
     status: str = "all",

backend/signal_engine.py

@@ -241,15 +241,18 @@ class SymbolState:
 
         if self.warmup or price == 0 or atr == 0:
             return result
-        if now_ms - self.last_signal_ts < COOLDOWN_MS:
-            return result
+
+        # 判断倾向方向（用于评分展示，即使冷却或方向不一致也计算）
+        no_direction = False
+        in_cooldown = (now_ms - self.last_signal_ts < COOLDOWN_MS)
 
         if cvd_fast > 0 and cvd_mid > 0:
             direction = "LONG"
         elif cvd_fast < 0 and cvd_mid < 0:
             direction = "SHORT"
         else:
-            return result
+            direction = "LONG" if cvd_fast > 0 else "SHORT"
+            no_direction = True
 
         # V5.1 五层评分体系（总分100，方向层可因加速额外+5）
         # 1) 方向层（45分 + 5加速分）
@@ -345,13 +348,13 @@ class SymbolState:
             "auxiliary": {"score": aux_score, "coinbase_premium": coinbase_premium},
         }
 
-        if total_score >= 85:
+        if total_score >= 85 and not no_direction and not in_cooldown:
             result["signal"] = direction
             result["tier"] = "heavy"
-        elif total_score >= 75:
+        elif total_score >= 75 and not no_direction and not in_cooldown:
             result["signal"] = direction
             result["tier"] = "standard"
-        elif total_score >= 60:
+        elif total_score >= 60 and not no_direction and not in_cooldown:
             result["signal"] = direction
             result["tier"] = "light"
         else:

frontend/app/signals/page.tsx

@@ -162,6 +162,70 @@ function MarketIndicatorsCards({ symbol }: { symbol: Symbol }) {
   );
 }
 
+// ─── 信号历史 ────────────────────────────────────────────────────
+
+interface SignalRecord {
+  ts: number;
+  score: number;
+  signal: string;
+}
+
+function bjtFull(ms: number) {
+  const d = new Date(ms + 8 * 3600 * 1000);
+  return `${String(d.getUTCMonth() + 1).padStart(2, "0")}-${String(d.getUTCDate()).padStart(2, "0")} ${String(d.getUTCHours()).padStart(2, "0")}:${String(d.getUTCMinutes()).padStart(2, "0")}:${String(d.getUTCSeconds()).padStart(2, "0")}`;
+}
+
+function SignalHistory({ symbol }: { symbol: Symbol }) {
+  const [data, setData] = useState<SignalRecord[]>([]);
+
+  useEffect(() => {
+    const fetchData = async () => {
+      try {
+        const res = await authFetch(`/api/signals/history?symbol=${symbol}&limit=20`);
+        if (!res.ok) return;
+        const json = await res.json();
+        setData(json.data || []);
+      } catch {}
+    };
+    fetchData();
+    const iv = setInterval(fetchData, 15000);
+    return () => clearInterval(iv);
+  }, [symbol]);
+
+  if (data.length === 0) return null;
+
+  return (
+    <div className="rounded-xl border border-slate-200 bg-white shadow-sm overflow-hidden">
+      <div className="px-4 py-3 border-b border-slate-100">
+        <h3 className="font-semibold text-slate-800 text-sm">最近信号</h3>
+        <p className="text-xs text-slate-400 mt-0.5">最近20条有效信号记录（北京时间）</p>
+      </div>
+      <div className="divide-y divide-slate-100">
+        {data.map((s, i) => (
+          <div key={i} className="px-4 py-2 flex items-center justify-between">
+            <div className="flex items-center gap-3">
+              <span className={`text-sm font-bold ${s.signal === "LONG" ? "text-emerald-600" : "text-red-500"}`}>
+                {s.signal === "LONG" ? "🟢 LONG" : "🔴 SHORT"}
+              </span>
+              <span className="text-xs text-slate-400">{bjtFull(s.ts)}</span>
+            </div>
+            <div className="flex items-center gap-2">
+              <span className="font-mono text-sm text-slate-700">{s.score}/100</span>
+              <span className={`text-xs px-1.5 py-0.5 rounded ${
+                s.score >= 85 ? "bg-red-100 text-red-700" :
+                s.score >= 75 ? "bg-blue-100 text-blue-700" :
+                "bg-slate-100 text-slate-600"
+              }`}>
+                {s.score >= 85 ? "加仓" : s.score >= 75 ? "标准" : "轻仓"}
+              </span>
+            </div>
+          </div>
+        ))}
+      </div>
+    </div>
+  );
+}
+
 // ─── 实时指标卡片 ────────────────────────────────────────────────
 
 function IndicatorCards({ symbol }: { symbol: Symbol }) {
@@ -410,6 +474,9 @@ export default function SignalsPage() {
         <MarketIndicatorsCards symbol={symbol} />
       </div>
 
+      {/* 信号历史 */}
+      <SignalHistory symbol={symbol} />
+
       {/* CVD三轨图 */}
       <div className="rounded-xl border border-slate-200 bg-white shadow-sm overflow-hidden">
         <div className="px-4 py-3 border-b border-slate-100 flex items-center justify-between flex-wrap gap-2">