fix: set explicit container dimensions before xterm init

- Measure parent dimensions and set them on container before term.open()
- Ensures FitAddon gets correct dimensions on initialization
- Prevents 1-row/1-col calculation that breaks scrolling and sizing

apps/web/src/components/terminal.tsx

@@ -197,7 +197,15 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
     term.loadAddon(fitAddon);
     term.loadAddon(new WebLinksAddon());
 
-    term.open(terminalRef.current);
+    // Ensure container has explicit dimensions before xterm initializes
+    const container = terminalRef.current;
+    const parentRect = container.parentElement?.getBoundingClientRect();
+    if (parentRect) {
+      container.style.width = `${parentRect.width}px`;
+      container.style.height = `${parentRect.height}px`;
+    }
+
+    term.open(container);
 
     // Connect WebSocket
     const ws = connectWebSocket();