fix: send resize message when font size changes

- After changing font size and calling fit(), send resize message to WebSocket
- OpenCode now receives correct terminal dimensions after font size adjustment
- Fixes issue where OpenCode UI didn't fill available space after font resize

apps/web/src/components/terminal.tsx

@@ -290,6 +290,16 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
         if (termRef.current && fitAddonRef.current) {
           try {
             fitAddonRef.current.fit();
+            const { cols, rows } = termRef.current;
+            if (wsRef.current?.readyState === WebSocket.OPEN) {
+              wsRef.current.send(
+                JSON.stringify({
+                  type: "resize",
+                  cols,
+                  rows,
+                })
+              );
+            }
           } catch {
             // Ignore fit errors during re-initialization
           }