fix: reduce minimum font size and prevent reconnection on font size change

- Reduce MIN_FONT_SIZE from 16 to 10 for better range
- Remove calculateFontSize from useEffect dependencies to prevent
  terminal re-initialization when font size changes
- Font size changes now update xterm options directly without
  disposing/recreating the terminal (no WebSocket reconnection)

apps/web/src/components/terminal.tsx

@@ -21,7 +21,7 @@ interface TerminalProps {
 }
 
 const FONT_SIZE_KEY = "terminal-font-size";
-const MIN_FONT_SIZE = 16;
+const MIN_FONT_SIZE = 10;
 const MAX_FONT_SIZE = 24;
 const RECONNECT_ATTEMPTS = 3;
 const RECONNECT_DELAY_BASE = 1000;
@@ -242,7 +242,8 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
       ws.close();
       term.dispose();
     };
-  }, [instanceId, connectWebSocket, calculateFontSize]);
+  // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [instanceId, connectWebSocket]);
 
   // Update parent about status changes
   useEffect(() => {