fix: add window resize listener and refresh on font size change

- Add window resize listener to complement ResizeObserver
- Clear window resize timeout on cleanup
- Force term.refresh() after font size changes
- Send resize message after font size change

apps/web/src/components/terminal.tsx

@@ -284,6 +284,16 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
     });
     resizeObserver.observe(container);
 
+    // Also handle window resize (ResizeObserver might miss viewport-only changes)
+    let windowResizeTimeout: ReturnType<typeof setTimeout>;
+    const handleWindowResize = () => {
+      clearTimeout(windowResizeTimeout);
+      windowResizeTimeout = setTimeout(() => {
+        requestAnimationFrame(() => fitTerminal());
+      }, 100);
+    };
+    window.addEventListener("resize", handleWindowResize);
+
     // Refit after mobile header auto-hides (3s delay + 0.3s transition)
     const headerHideTimeout = setTimeout(() => {
       fitTerminal();
@@ -316,8 +326,10 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
 
     return () => {
       clearTimeout(resizeTimeout);
+      clearTimeout(windowResizeTimeout);
       clearTimeout(headerHideTimeout);
       resizeObserver.disconnect();
+      window.removeEventListener("resize", handleWindowResize);
       document.removeEventListener("visibilitychange", handleVisibilityChange);
       if (ws) {
         ws.close();
@@ -356,6 +368,8 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
           try {
             fitAddonRef.current.fit();
             const { cols, rows } = termRef.current;
+            // Force refresh after font size change
+            termRef.current.refresh(0, rows - 1);
             if (wsRef.current?.readyState === WebSocket.OPEN) {
               wsRef.current.send(
                 JSON.stringify({