UI: update HomeView onboard alert style

- Style-wise, make it consistent with similar alerts
- Introduce visual hierarchy to buttons
- Responsive button layout

src/views/HomeView.vue

@@ -86,31 +86,30 @@ Raymer * @version 1.0.0 */
       Identity creation is now handled by router navigation guard.
       -->
       <div class="mb-4">
+        <div v-if="!isUserRegistered" class="my-4">
           <div
-          v-if="!isUserRegistered"
             id="noticeSomeoneMustRegisterYou"
-          class="bg-amber-200 rounded-md overflow-hidden text-center px-4 py-3 mb-4"
+            class="bg-amber-200 text-amber-900 border-amber-500 border-dashed border text-center rounded-md overflow-hidden px-4 py-3"
           >
-          To share, someone must register you.
-          <div class="block text-center">
+            <p class="mb-4">To share, someone must register you.</p>
+            <div class="grid grid-cols-1 gap-2 sm:flex sm:justify-center">
               <button
-              class="text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white mt-2 px-2 py-3 rounded-md"
+                class="inline-block text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-4 py-2 rounded-md"
                 @click="showNameThenIdDialog()"
               >
                 Show them {{ PASSKEYS_ENABLED ? "default" : "your" }} identifier
                 info
               </button>
-          </div>
-          <UserNameDialog ref="userNameDialog" />
-          <div class="flex justify-end w-full">
               <router-link
                 :to="{ name: 'start' }"
-              class="block text-right text-md font-bold bg-gradient-to-b from-blue-400 to-blue-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white mt-2 px-2 py-3 rounded-md"
+                class="inline-block text-md bg-gradient-to-b from-slate-400 to-slate-700 shadow-[inset_0_-1px_0_0_rgba(0,0,0,0.5)] text-white px-4 py-2 rounded-md"
               >
                 See advanced options
               </router-link>
             </div>
           </div>
+          <UserNameDialog ref="userNameDialog" />
+        </div>
 
         <div v-else id="sectionRecordSomethingGiven">
           <!-- Record Quick-Action -->