feat: add selectable daily backtest cadence

frontend/src/components/signals/BacktestPanel.tsx

@@ -2,7 +2,7 @@ import { useMemo, useState } from 'react';
 import { useMutation, useQueryClient } from '@tanstack/react-query';
 import { useBacktestReport } from '../../hooks/useMarketRegime';
 import { triggerJob } from '../../api/admin';
-import type { BacktestTargetModel } from '../../api/admin';
+import type { BacktestCadence, BacktestTargetModel } from '../../api/admin';
 import { Button } from '../ui/Button';
 import { Callout } from '../ui/Callout';
 import { Disclosure } from '../ui/Disclosure';
@@ -145,6 +145,7 @@ export function BacktestPanel() {
   const [selectedStrategy, setSelectedStrategy] = useState('');
   const [selectedLookback, setSelectedLookback] = useState('');
   const [targetModel, setTargetModel] = useState<BacktestTargetModel>('production_gtl');
+  const [cadence, setCadence] = useState<BacktestCadence>('weekly');
 
   const monitor = report?.portfolio_monitor ?? null;
   const activeStrategy =
@@ -161,11 +162,11 @@ export function BacktestPanel() {
   );
 
   const run = useMutation({
-    mutationFn: () => triggerJob('backtest', { target_model: targetModel }),
+    mutationFn: () => triggerJob('backtest', { target_model: targetModel, cadence }),
     onSuccess: (res) => {
       if (res.status === 'triggered') {
         const label = targetModel === 'production_gtl' ? 'Live GTL' : 'Structural S/R comparison';
-        toast.addToast('success', `${label} backtest started — results appear when it finishes.`);
+        toast.addToast('success', `${label} ${cadence} backtest started — results appear when it finishes.`);
         setTimeout(() => queryClient.invalidateQueries({ queryKey: ['backtest-report'] }), 8000);
       } else {
         toast.addToast('info', res.message || 'Could not start backtest');
@@ -180,7 +181,7 @@ export function BacktestPanel() {
         <div className="flex flex-wrap items-start justify-between gap-3">
           <Disclosure summary="How this is measured">
             <p className="max-w-2xl text-xs text-gray-400">
-              The backtest replays the current config weekly through history — at each point the setup is
+              The backtest replays the current config at the selected cadence — at each point the setup is
               rebuilt using only data up to that day (no lookahead) and the following ~30 trading days decide
               its outcome — then simulates one capital-constrained book against the S&P 500. Sentiment and
               fundamentals are held neutral (no point-in-time history). ~6 months is roughly one market regime,
@@ -238,6 +239,56 @@ export function BacktestPanel() {
                 </span>
               </label>
             </fieldset>
+            <fieldset className="grid w-full grid-cols-2 gap-2 sm:w-[34rem]">
+              <legend className="mb-1 text-[11px] font-medium uppercase tracking-wider text-gray-500">
+                Entry cadence
+              </legend>
+              <label
+                className={`cursor-pointer rounded-lg border px-3 py-2 transition-colors focus-within:ring-2 focus-within:ring-blue-400/60 ${
+                  cadence === 'weekly'
+                    ? 'border-blue-400/60 bg-blue-500/10'
+                    : 'border-white/10 bg-white/[0.03] hover:border-white/20'
+                }`}
+              >
+                <input
+                  className="sr-only"
+                  type="radio"
+                  name="backtest-cadence"
+                  value="weekly"
+                  checked={cadence === 'weekly'}
+                  onChange={() => setCadence('weekly')}
+                />
+                <span className="flex items-center justify-between gap-2 text-sm font-medium text-gray-100">
+                  Weekly
+                  <span className="rounded-full border border-blue-400/40 bg-blue-400/10 px-2 py-0.5 text-[9px] font-semibold uppercase tracking-widest text-blue-300">
+                    Default
+                  </span>
+                </span>
+                <span className="mt-1 block text-[11px] leading-4 text-gray-500">
+                  Resource-safe server run at five-session intervals.
+                </span>
+              </label>
+              <label
+                className={`cursor-pointer rounded-lg border px-3 py-2 transition-colors focus-within:ring-2 focus-within:ring-amber-400/60 ${
+                  cadence === 'daily'
+                    ? 'border-amber-400/50 bg-amber-500/10'
+                    : 'border-white/10 bg-white/[0.03] hover:border-white/20'
+                }`}
+              >
+                <input
+                  className="sr-only"
+                  type="radio"
+                  name="backtest-cadence"
+                  value="daily"
+                  checked={cadence === 'daily'}
+                  onChange={() => setCadence('daily')}
+                />
+                <span className="text-sm font-medium text-gray-200">Daily</span>
+                <span className="mt-1 block text-[11px] leading-4 text-amber-300/80">
+                  Research run: roughly 5× the replay work; prefer the offline snapshot runner.
+                </span>
+              </label>
+            </fieldset>
             <Button onClick={() => run.mutate()} loading={run.isPending} className="shrink-0">
               {run.isPending ? 'Starting…' : report ? 'Re-run backtest' : 'Run backtest'}
             </Button>
@@ -257,7 +308,8 @@ export function BacktestPanel() {
           <>
             <p className="text-[11px] text-gray-500">
               Ran {timeAgo(report.generated_at)} · {report.tickers} tickers · {report.candidates} setups
-              ({report.qualified} qualified) · weekly cadence, {report.params.horizon_days}-day horizon
+              ({report.qualified} qualified) · {report.params.entry_cadence ?? 'weekly'} cadence,
+              {' '}{report.params.horizon_days}-day horizon
               {report.params.cost_per_side_pct != null && (
                 <> · net of {report.params.cost_per_side_pct}%/side costs</>
               )}