feat(404): update 404.html style

layouts/404.html

@@ -6,12 +6,8 @@
     <div class="notfound">
         <h1 class="error-emoji"></h1>
         <p class="error-text">
-            {{- T "pageNotFoundText" -}}
-        </p>
-        <p class="error-link">
-            <a href="{{ .Site.BaseURL }}">
-                {{- T "backToHome" | printf "← %s" -}}
-            </a>
+            {{- T "pageNotFoundText" -}}&nbsp;
+            <a href="{{ .Site.BaseURL }}" title="{{ T "backToHome" }}">↩︎</a>
         </p>
     </div>
     <script>

layouts/partials/home/profile.html

@@ -8,7 +8,7 @@
     {{- if $avatar -}}
         <div class="home-avatar">
             <a href="/posts">
-                <img src={{ $avatar | relURL }} alt="avatar">
+                <img src={{ $avatar | relURL }} alt="avatar" title="{{ T "home" }}">
             </a>
         </div>
     {{- end -}}