feat(stock): /stock/screener 페이지 골격 + hooks 4개 + 컴포넌트 stub 6개

src/pages/stock/screener/hooks/useScreenerRun.js

@@ -0,0 +1,31 @@
+import { useState } from 'react';
+import { runScreener } from '../../../../api';
+
+export function useScreenerRun() {
+  const [result, setResult] = useState(null);
+  const [running, setRunning] = useState(false);
+
+  async function call(mode, settings) {
+    setRunning(true);
+    try {
+      const body = {
+        mode,
+        weights: settings.weights,
+        node_params: settings.node_params,
+        gate_params: settings.gate_params,
+        top_n: settings.top_n,
+      };
+      const r = await runScreener(body);
+      setResult(r);
+      return r;
+    } finally {
+      setRunning(false);
+    }
+  }
+
+  return {
+    result, running,
+    runPreview: (s) => call('preview', s),
+    runSave:    (s) => call('manual_save', s),
+  };
+}