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/settings/billings/show.html.erb

@@ -5,7 +5,7 @@
     <div class="p-3 shadow-border-xs bg-container rounded-lg flex justify-between items-center">
       <div class="flex items-center gap-3">
         <div class="w-9 h-9 rounded-full bg-gray-25 flex justify-center items-center">
-          <%= lucide_icon "gem", class: "w-5 h-5 text-secondary" %>
+          <%= icon "gem" %>
         </div>
 
         <div class="text-sm space-y-1">
@@ -19,15 +19,24 @@
       </div>
 
       <% if @user.family.subscribed? || subscription_pending? %>
-        <%= link_to subscription_path, class: "btn btn--secondary flex items-center gap-1", target: "_blank", rel: "noopener" do %>
-          <span>Manage</span>
-          <%= lucide_icon "external-link", class: "w-5 h-5 shrink-0 text-secondary" %>
-        <% end %>
+        <%= render LinkComponent.new(
+          text: "Manage",
+          icon: "external-link",
+          variant: "primary",
+          icon_position: "right",
+          href: subscription_path,
+          target: "_blank",
+          rel: "noopener"
+        ) %>
       <% else %>
-        <%= link_to new_subscription_path, class: "btn btn--secondary flex items-center gap-1", target: "_blank", rel: "noopener" do %>
-          <span>Subscribe</span>
-          <%= lucide_icon "external-link", class: "w-5 h-5 shrink-0 text-secondary" %>
-        <% end %>
+        <%= render LinkComponent.new(
+          text: "Subscribe",
+          variant: "primary",
+          icon: "external-link",
+          icon_position: "right",
+          href: new_subscription_path,
+          target: "_blank",
+          rel: "noopener") %>
       <% end %>
     </div>