fix(ui): use the full page width and fit phone screens

The page no longer caps its width. On very wide screens the attention list shows two columns of projects.

On phones the header, the health strip and the filter chips wrap or scroll inside their own box, and each item shows its age under the text. The side panel scrolls on its own.

src/App.vue

@@ -64,7 +64,7 @@ onBeforeUnmount(() => {
 </script>
 
 <template>
-  <main class="mx-auto max-w-7xl px-5 py-6 sm:px-8">
+  <main class="w-full px-4 py-4 sm:px-6 sm:py-6 lg:px-10">
     <AppHeader
       :last-refresh="state?.lastRefresh ?? ''"
       :now-ms="nowMs"
@@ -92,7 +92,7 @@ onBeforeUnmount(() => {
       Fetching data from GitHub
     </p>
     <template v-else>
-      <div class="mt-12">
+      <div class="mt-8 sm:mt-12">
         <FleetOverview
           :crit="state.counts.crit"
           :warn="state.counts.warn"
@@ -106,7 +106,7 @@ onBeforeUnmount(() => {
         />
       </div>
       <div
-        class="mt-14 grid grid-cols-[minmax(0,1fr)] gap-x-10 gap-y-12 lg:grid-cols-[minmax(0,1fr)_23rem]"
+        class="mt-10 grid grid-cols-[minmax(0,1fr)] gap-x-10 gap-y-10 sm:mt-14 lg:grid-cols-[minmax(0,1fr)_24rem] 2xl:grid-cols-[minmax(0,1fr)_28rem]"
       >
         <AttentionList
           ref="list"