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

test/system/accounts_test.rb

@@ -92,7 +92,8 @@ class AccountsTest < ApplicationSystemTestCase
 
       click_button "Create Account"
 
-      within "[data-controller='tabs']" do
+      within_testid("account-sidebar-tabs") do
+        click_on "All"
         find("details", text: Accountable.from_type(accountable_type).display_name).click
         assert_text account_name
       end
@@ -104,8 +105,8 @@ class AccountsTest < ApplicationSystemTestCase
 
       visit account_url(created_account)
 
-      within "header:has(button[data-menu-target='button'])" do
-        find('button[data-menu-target="button"]').click
+      within_testid("account-menu") do
+        find("button").click
         click_on "Edit"
       end