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/onboardings/_header.html.erb

@@ -1,7 +1,7 @@
 <header class="flex justify-between items-center p-4 pt-safe">
   <%= image_tag "logo.svg", class: "h-[22px]" %>
   <div class="flex items-center gap-2">
-    <%= lucide_icon "log-in", class: "w-5 h-5 shrink-0 text-secondary gap-2" %>
+    <%= icon("log-in", color: "secondary") %>
     <%= button_to t(".sign_out"), session_path(Current.session), method: :delete, class: "text-sm text-primary font-medium" %>
   </div>
 </header>

app/views/onboardings/preferences.html.erb

@@ -69,7 +69,7 @@
             { data: { action: "onboarding#setLocale" } } %>
 
             <%= family_form.select :currency,
-            currencies_for_select.map { |currency| [ "#{currency.name} (#{currency.iso_code})", currency.iso_code ] },
+            Money::Currency.as_options.map { |currency| [ "#{currency.name} (#{currency.iso_code})", currency.iso_code ] },
             { label: t(".currency"), required: true, selected: params[:currency] || @user.family.currency },
             { data: { action: "onboarding#setCurrency" } } %>
 

app/views/onboardings/show.html.erb

@@ -5,7 +5,12 @@
       <%= tag.h1 t(".title"), class: "text-3xl font-medium mb-2" %>
       <%= tag.p t(".message"), class: "text-sm text-secondary mb-6" %>
 
-      <%= link_to t(".setup"), profile_onboarding_path, class: "block flex justify-center items-center btn btn--primary w-full" %>
+      <%= render LinkComponent.new(
+        text: t(".setup"),
+        href: profile_onboarding_path,
+        variant: "primary",
+        full_width: true
+      ) %>
     </div>
   </div>
 </div>