Resolve symbol from positioned contract in copy-trade

Instead of relying on the scheduler state (which may be 'Auto'), look up
each enabled symbol's front-month contract and match by contractId to
determine which symbol the positioned accounts are actually trading.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/auto-trade.ts

@@ -326,7 +326,7 @@ export async function copyTrade() {
 
     // Find all accounts with open positions to determine direction + symbol
     let resolvedAction: 'Buy' | 'Sell' | null = null;
-    let resolvedSymbol: string | null = null;
+    let positionContractId: number | null = null;
     let positionedCount = 0;
 
     for (const firm of firms) {
@@ -338,11 +338,7 @@ export async function copyTrade() {
             positionedCount++;
             if (!resolvedAction) {
                 resolvedAction = pos.netPos > 0 ? 'Buy' : 'Sell';
-            }
-            // Determine the symbol from the scheduler state (positions only have contractId)
-            if (!resolvedSymbol) {
-                const state = getState();
-                resolvedSymbol = state.symbol === 'Auto' ? null : state.symbol;
+                positionContractId = pos.contractId;
             }
         }
     }
@@ -352,11 +348,29 @@ export async function copyTrade() {
         return [];
     }
 
-    // Fall back to enabled instruments if symbol unknown
-    if (!resolvedSymbol) {
+    // Resolve symbol from the positioned contract's contractId
+    let resolvedSymbol: string | null = null;
     const instruments = getInstruments();
-        const enabled = instruments.filter(i => i.enabled).map(i => i.symbol);
-        resolvedSymbol = enabled[0] ?? 'NQ';
+    const enabledSymbols = instruments.filter(i => i.enabled).map(i => i.symbol);
+
+    // Try each enabled symbol to find which one matches the positioned contractId
+    for (const firm of firms) {
+        const client = clients.get(firm.id);
+        if (!client) continue;
+        for (const sym of enabledSymbols) {
+            const contract = await client.findFrontMonthContract(sym);
+            if (contract && contract.id === positionContractId) {
+                resolvedSymbol = sym;
+                break;
+            }
+        }
+        if (resolvedSymbol) break;
+    }
+
+    // Fall back to scheduler symbol or first enabled
+    if (!resolvedSymbol) {
+        const state = getState();
+        resolvedSymbol = state.symbol !== 'Auto' ? state.symbol : (enabledSymbols[0] ?? 'NQ');
     }
 
     const pointValue = POINT_VALUES[resolvedSymbol];