Multi-ticker historical backtests: ticker filter + per-coin grouping

- Historical cards now deduplicated by strategy+ticker (28 entries: 7×4)
- Ticker filter bar: ALL | BTC | ETH | HYPE | VVV
- Coin badge on each card
- BacktestSummary.coin now required string field
- fetchHistorical groups by strategy · coin composite key

dashboard-next/src/app/page.tsx

@@ -32,6 +32,7 @@ export default function Dashboard() {
   const [feeTier, setFeeTier] = useState(0);
   const [stakingTier, setStakingTier] = useState("none");
   const [posOpen, setPosOpen] = useState(false);
+  const [tickerFilter, setTickerFilter] = useState("ALL");
 
   useEffect(() => { fetchHistorical().then(setHistorical); }, []);
 
@@ -301,6 +302,18 @@ export default function Dashboard() {
       </div>
 
       <main className="max-w-[1440px] mx-auto px-6 py-6">
+        {/* Ticker filter for Historical tab */}
+        {tab === "historical" && (
+          <div className="flex items-center gap-2 mb-4 flex-wrap">
+            <span className="text-[9px] text-muted-foreground uppercase tracking-wider mr-1">Ticker:</span>
+            {["ALL", "BTC", "ETH", "HYPE", "VVV"].map((t) => (
+              <button key={t} onClick={() => setTickerFilter(t)}
+                className={`text-[10px] px-3 py-1 rounded-md border transition-colors ${tickerFilter === t ? "bg-primary text-primary-foreground border-primary" : "bg-card text-muted-foreground border-border hover:border-primary/50"}`}>
+                {t}
+              </button>
+            ))}
+          </div>
+        )}
         <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-3 mb-6">
           <AnimatePresence mode="popLayout">
             {Object.entries(strategies).map(([name, s], i) => (
@@ -309,10 +322,11 @@ export default function Dashboard() {
               </motion.div>
             ))}
           </AnimatePresence>
-          {tab === "historical" && Object.entries(historical).map(([name, b], i) => (
+          {tab === "historical" && Object.entries(historical).filter(([, b]) => tickerFilter === "ALL" || b.coin === tickerFilter).map(([name, b], i) => (
             <motion.div key={name} layout initial={{ opacity: 0, y: 8 }} animate={{ opacity: 1, y: 0 }} transition={{ duration: 0.2, delay: i * 0.03 }}>
               <StrategyCard name={name} tab="historical" onClick={() => handleCardClick(name, "historical")}
-                badge={`30d · ${b.coin ?? "BTC"} · Mainnet`}
+                coin={String(b.coin ?? "?")}
+                badge={`30d · Mainnet`}
                 stats={[{ label: "Sharpe", value: b.sharpe.toFixed(2) }, { label: "Max DD", value: `${(b.max_dd * 100).toFixed(1)}%`, negative: true }, { label: "Win", value: `${Math.round(b.win_rate * 100)}%` }]}
                 pnlPct={b.pnl_pct} status="REAL DATA" />
             </motion.div>