Pre-launch design sync with Figma spec (#2154)

* Add lookbook + viewcomponent, organize design system file

* Build menu component

* Button updates

* More button fixes

* Replace all menus with new ViewComponent

* Checkpoint: fix tests, all buttons and menus converted

* Split into Link and Button components for clarity

* Button cleanup

* Simplify custom confirmation configuration in views

* Finalize button, link component API

* Add toggle field to custom form builder + Component

* Basic tabs component

* Custom tabs, convert all menu / tab instances in app

* Gem updates

* Centralized icon helper

* Update all icon usage to central helper

* Lint fixes

* Centralize all disclosure instances

* Dialog replacements

* Consolidation of all dialog styles

* Test fixes

* Fix app layout issues, move to component with slots

* Layout simplification

* Flakey test fix

* Fix dashboard mobile issues

* Finalize homepage

* Lint fixes

* Fix shadows and borders in dark mode

* Fix tests

* Remove stale class

* Fix filled icon logic

* Move transparent? to public interface

app/views/chats/_error.html.erb

@@ -10,8 +10,9 @@
   <div class="flex items-center justify-between gap-2">
     <p class="text-xs text-red-500">Failed to generate response.  Please try again.</p>
 
-    <%= button_to retry_chat_path(chat), method: :post, class: "btn btn--primary" do %>
-      <span>Retry</span>
-    <% end %>
+    <%= render ButtonComponent.new(
+      text: "Retry",
+      href: retry_chat_path(chat),
+    ) %>
   </div>
 </div>