feat: 迁移 Alpha 指标配色并以 bps 展示 Margin

frontend/src/pages/AlphaPage.tsx

@@ -67,6 +67,31 @@ const metricLabels = {
   prod_correlation: "平台生产相关性",
   pnl: "IS PnL",
 };
+const metricColorThresholds: Record<string, [number, number, number]> = {
+  sharpe: [1.5, 1.0, 0.5],
+  fitness: [0.75, 0.5, 0.25],
+  returns: [0.15, 0.1, 0.05],
+};
+
+/** Preserve the legacy list's strict thresholds; missing values have no rating. */
+function metricColor(key: string, value: unknown): string | undefined {
+  const thresholds = metricColorThresholds[key];
+  if (!thresholds || typeof value !== "number" || !Number.isFinite(value))
+    return undefined;
+  if (value > thresholds[0]) return "var(--semi-color-success)";
+  if (value > thresholds[1]) return "var(--semi-color-info)";
+  if (value > thresholds[2]) return "var(--semi-color-warning)";
+  return "var(--semi-color-danger)";
+}
+
+/** Convert Margin only for display; filtering and sorting still use raw values. */
+function formatMetric(key: string, value: unknown): string {
+  if (key !== "margin") return formatNumber(value, 3);
+  return typeof value === "number" && Number.isFinite(value)
+    ? `${formatNumber(value * 10000, 2)}bps`
+    : "—";
+}
+
 const checkLabels = {
   PENDING: "待检查",
   PRE_CHECK: "预检通过",
@@ -478,8 +503,11 @@ export function AlphaPage({
             : 112,
         align: "right",
         render: (_, row) => (
-          <span className="numeric">
-            {formatNumber(row![key as keyof Alpha], key === "margin" ? 6 : 3)}
+          <span
+            className="numeric"
+            style={{ color: metricColor(key, row![key as keyof Alpha]) }}
+          >
+            {formatMetric(key, row![key as keyof Alpha])}
           </span>
         ),
       }),