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/components/menu_item_component.rb

@@ -0,0 +1,57 @@
+class MenuItemComponent < ViewComponent::Base
+  VARIANTS = %i[link button divider].freeze
+
+  attr_reader :variant, :text, :icon, :href, :method, :destructive, :confirm, :opts
+
+  def initialize(variant:, text: nil, icon: nil, href: nil, method: :post, destructive: false, confirm: nil, **opts)
+    @variant = variant.to_sym
+    @text = text
+    @icon = icon
+    @href = href
+    @method = method.to_sym
+    @destructive = destructive
+    @opts = opts
+    @confirm = confirm
+    raise ArgumentError, "Invalid variant: #{@variant}" unless VARIANTS.include?(@variant)
+  end
+
+  def wrapper(&block)
+    if variant == :button
+      button_to href, method: method, class: container_classes, **merged_button_opts, &block
+    elsif variant == :link
+      link_to href, class: container_classes, **opts, &block
+    else
+      nil
+    end
+  end
+
+  def text_classes
+    [
+      "text-sm",
+      destructive? ? "text-destructive" : "text-primary"
+    ].join(" ")
+  end
+
+  def destructive?
+    method == :delete || destructive
+  end
+
+  private
+    def container_classes
+      [
+        "flex items-center gap-2 p-2 rounded-md w-full",
+        destructive? ? "hover:bg-red-tint-5 theme-dark:hover:bg-red-tint-10" : "hover:bg-container-hover"
+      ].join(" ")
+    end
+
+    def merged_button_opts
+      merged_opts = opts.dup || {}
+      data = merged_opts.delete(:data) || {}
+
+      if confirm.present?
+        data = data.merge(turbo_confirm: confirm.to_data_attribute)
+      end
+
+      merged_opts.merge(data: data)
+    end
+end