Remove unused _ConnectionIndicator and _StatusDot widgets

Delete dead code that triggered an unused_element analyzer warning.
_ConnectionIndicator was unreferenced and _StatusDot was only used by it.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/main.dart

@@ -1171,66 +1171,6 @@ class _ConnectionSummary extends StatelessWidget {
   }
 }
 
-class _ConnectionIndicator extends StatelessWidget {
-  const _ConnectionIndicator({
-    required this.connected,
-    required this.connecting,
-    required this.animation,
-  });
-
-  final bool connected;
-  final bool connecting;
-  final Animation<double> animation;
-
-  @override
-  Widget build(BuildContext context) {
-    final color = connected
-        ? const Color(0xFF16A34A)
-        : connecting
-        ? Theme.of(context).colorScheme.primary
-        : const Color(0xFFDC2626);
-
-    return AnimatedBuilder(
-      animation: animation,
-      builder: (context, child) {
-        return _StatusDot(
-          color: color,
-          scale: connected || connecting ? animation.value : 1,
-        );
-      },
-    );
-  }
-}
-
-class _StatusDot extends StatelessWidget {
-  const _StatusDot({required this.color, required this.scale});
-
-  final Color color;
-  final double scale;
-
-  @override
-  Widget build(BuildContext context) {
-    return Transform.scale(
-      scale: scale,
-      child: Container(
-        width: 12,
-        height: 12,
-        decoration: BoxDecoration(
-          color: color,
-          shape: BoxShape.circle,
-          boxShadow: [
-            BoxShadow(
-              color: color.withValues(alpha: 0.24),
-              blurRadius: 8,
-              spreadRadius: 2,
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-}
-
 class _FooterToggle extends StatelessWidget {
   const _FooterToggle({
     required this.label,