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/settings_test.rb

@@ -39,7 +39,7 @@ class SettingsTest < ApplicationSystemTestCase
     click_link "Self hosting"
     assert_current_path settings_hosting_path
     assert_selector "h1", text: "Self-Hosting"
-    check "setting_require_invite_for_signup", allow_label_click: true
+    check "setting[require_invite_for_signup]", allow_label_click: true
     click_button "Generate new code"
     assert_selector 'span[data-clipboard-target="source"]', visible: true, count: 1 # invite code copy widget
     copy_button = find('button[data-action="clipboard#copy"]', match: :first) # Find the first copy button (adjust if needed)
@@ -56,7 +56,9 @@ class SettingsTest < ApplicationSystemTestCase
   private
 
     def open_settings_from_sidebar
-      find("#user-menu").click
+      within "div[data-testid=user-menu]" do
+        find("button").click
+      end
       click_link "Settings"
     end
 end