fix: prevent fight view scrolling on mobile with tab bar

All pages used h-[calc(100dvh-4rem)] which only subtracted the top
navbar but ignored the mobile tab bar's pb-14 bottom padding, causing
content to overflow and scroll. Changed all pages to h-full so they
fill the flex parent (main element) which already handles both the
navbar and tab bar spacing correctly.

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

frontend/src/pages/FightCardPage.vue

@@ -114,7 +114,7 @@ onUnmounted(() => {
 </script>
 
 <template>
-  <div class="h-[calc(100dvh-4rem)] flex flex-col overflow-hidden relative">
+  <div class="h-full flex flex-col overflow-hidden relative">
 
     <!-- Page background -->
     <div class="absolute inset-0 overflow-hidden pointer-events-none">