fix: send terminal resize immediately on WebSocket connect

- Backend PTY starts with default 80x24 dimensions
- Previous code only sent resize during layout changes
- Now sends current terminal size immediately when WebSocket opens
- Ensures PTY is properly sized before shell starts rendering

apps/web/src/components/terminal.tsx

@@ -79,6 +79,13 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
       reconnectAttemptsRef.current = 0;
       lastPingRef.current = Date.now();
       
+      // Send current terminal size immediately on connect
+      if (termRef.current) {
+        const { cols, rows } = termRef.current;
+        console.log(`[Terminal] Sending resize on connect: ${cols}x${rows}`);
+        ws.send(JSON.stringify({ type: "resize", cols, rows }));
+      }
+      
       // Start heartbeat check
       if (heartbeatCheckRef.current) {
         window.clearInterval(heartbeatCheckRef.current);