style: apply dart formatting fixes across lib/ and test/

11 files had formatting inconsistencies that caused the
--set-exit-if-changed gate to fail. Automated formatting
via dart format now passes cleanly.

lib/show_card.dart

@@ -39,9 +39,7 @@ class ShowCard extends StatelessWidget {
               '$label: ${show?.name ?? 'No scheduled show'}',
               maxLines: 1,
               overflow: TextOverflow.ellipsis,
-              style: Theme.of(
-                context,
-              ).textTheme.bodyMedium?.copyWith(
+              style: Theme.of(context).textTheme.bodyMedium?.copyWith(
                 fontWeight: FontWeight.w600,
                 color: titleColor,
               ),
@@ -49,10 +47,7 @@ class ShowCard extends StatelessWidget {
           ),
           const SizedBox(width: 8),
           Text(
-            formatStartingTime(
-              show?.starts,
-              sourceTimezone: sourceTimezone,
-            ),
+            formatStartingTime(show?.starts, sourceTimezone: sourceTimezone),
             style: Theme.of(
               context,
             ).textTheme.labelSmall?.copyWith(color: titleColor),