Add "Blocks by user" nav tab to block list/show pages

app/views/user_blocks/_navigation.html.erb

@@ -26,4 +26,12 @@
                   :class => ["nav-link", { :active => action_name == "blocks_by" && current_user == @user }] %>
     </li>
   <% end %>
+  <% by_user = @user || @user_block&.creator %>
+  <% if by_user != current_user && by_user&.blocks_created&.exists? %>
+    <li class="nav-item">
+      <%= link_to t(".blocks_by_user", :user => by_user.display_name),
+                  user_blocks_by_path(by_user),
+                  :class => ["nav-link", { :active => action_name == "blocks_by" }] %>
+    </li>
+  <% end %>
 </ul>

config/locales/en.yml

@@ -2990,6 +2990,7 @@ en:
       blocks_on_me: "Blocks on Me"
       blocks_on_user: "Blocks on %{user}"
       blocks_by_me: "Blocks by Me"
+      blocks_by_user: "Blocks by %{user}"
   user_mutes:
     index:
       title: "Muted Users"