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

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

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+import { useEffect, useState } from 'react';
+import { listScreenerRuns, getScreenerRun } from '../../../../api';
+
+export function useScreenerHistory() {
+  const [runs, setRuns] = useState([]);
+  const [loading, setLoading] = useState(true);
+  const [selectedRun, setSelectedRun] = useState(null);
+
+  useEffect(() => {
+    listScreenerRuns(30).then((r) => { setRuns(r); setLoading(false); });
+  }, []);
+
+  async function selectRun(id) {
+    if (!id) { setSelectedRun(null); return; }
+    const detail = await getScreenerRun(id);
+    setSelectedRun({
+      asof: detail.meta.asof,
+      mode: detail.meta.mode,
+      status: detail.meta.status,
+      run_id: detail.meta.id,
+      survivors_count: detail.meta.survivors_count,
+      weights: detail.meta.weights,
+      top_n: detail.meta.top_n,
+      results: detail.results,
+      telegram_payload: null,
+      warnings: [],
+      meta: detail.meta,
+    });
+  }
+
+  return { runs, runs_loading: loading, selectedRun, selectRun };
+}

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

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+import { useEffect, useState } from 'react';
+import { getScreenerNodes } from '../../../../api';
+
+export function useScreenerMeta() {
+  const [meta, setMeta] = useState(null);
+  const [loading, setLoading] = useState(true);
+  useEffect(() => {
+    getScreenerNodes().then((m) => { setMeta(m); setLoading(false); });
+  }, []);
+  return { meta, loading };
+}

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

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+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),
+  };
+}

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

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+import { useEffect, useState } from 'react';
+import { getScreenerSettings, saveScreenerSettings } from '../../../../api';
+
+export function useScreenerSettings() {
+  const [remote, setRemote] = useState(null);
+  const [local, setLocal] = useState(null);
+
+  useEffect(() => {
+    getScreenerSettings().then((s) => { setRemote(s); setLocal(s); });
+  }, []);
+
+  const dirty = remote && local && JSON.stringify(remote) !== JSON.stringify(local);
+
+  async function save() {
+    if (!local) return;
+    const saved = await saveScreenerSettings({
+      weights: local.weights, node_params: local.node_params, gate_params: local.gate_params,
+      top_n: local.top_n, rr_ratio: local.rr_ratio,
+      atr_window: local.atr_window, atr_stop_mult: local.atr_stop_mult,
+    });
+    setRemote(saved);
+    setLocal(saved);
+  }
+
+  return { settings: local, dirty, setLocal, save };
+}