fix: remove container ResizeObserver causing infinite growth loop

- Container-level ResizeObserver created feedback loop with fitAddon.fit()
- Removed it, kept initialization-time dimension check only
- Rely on window resize listener for viewport changes

apps/web/src/components/terminal.tsx

@@ -56,7 +56,6 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
   });
   const lastPingRef = useRef<number>(0);
   const heartbeatCheckRef = useRef<number | null>(null);
-  const containerResizeObserverRef = useRef<ResizeObserver | null>(null);
 
   const calculateFontSize = useCallback(() => {
     if (!isMobile) return fontSize;
@@ -319,28 +318,6 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
 
     window.addEventListener("resize", handleResize);
 
-    // Watch container size changes (e.g. mobile header auto-hide, keyboard)
-    const containerResizeObserver = new ResizeObserver((entries) => {
-      for (const entry of entries) {
-        const { width, height } = entry.contentRect;
-        if (width > 0 && height > 0) {
-          fitAddon.fit();
-          const { cols, rows } = term;
-          if (ws.readyState === WebSocket.OPEN) {
-            ws.send(
-              JSON.stringify({
-                type: "resize",
-                cols,
-                rows,
-              })
-            );
-          }
-        }
-      }
-    });
-    containerResizeObserver.observe(container);
-    containerResizeObserverRef.current = containerResizeObserver;
-
     // Notify parent about terminal readiness
     if (onTerminalReadyRef.current) {
       const sendData = (data: string) => {
@@ -370,10 +347,6 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
       clearTimeout(resizeTimeout);
       window.removeEventListener("resize", handleResize);
       document.removeEventListener("visibilitychange", handleVisibilityChange);
-      if (containerResizeObserverRef.current) {
-        containerResizeObserverRef.current.disconnect();
-        containerResizeObserverRef.current = null;
-      }
       if (ws) {
         ws.close();
       }