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/buttonish_component.rb

@@ -0,0 +1,148 @@
+class ButtonishComponent < ViewComponent::Base
+  VARIANTS = {
+    primary: {
+      container_classes: "text-inverse bg-inverse hover:bg-inverse-hover disabled:bg-gray-500 theme-dark:disabled:bg-gray-400",
+      icon_classes: "fg-inverse"
+    },
+    secondary: {
+      container_classes: "text-secondary bg-gray-50 theme-dark:bg-gray-700 hover:bg-gray-100 theme-dark:hover:bg-gray-600 disabled:bg-gray-200 theme-dark:disabled:bg-gray-600",
+      icon_classes: "fg-primary"
+    },
+    destructive: {
+      container_classes: "text-inverse bg-red-500 theme-dark:bg-red-400 hover:bg-red-600 theme-dark:hover:bg-red-500 disabled:bg-red-200 theme-dark:disabled:bg-red-600",
+      icon_classes: "fg-white"
+    },
+    outline: {
+      container_classes: "text-primary border border-secondary bg-transparent hover:bg-surface-hover",
+      icon_classes: "fg-gray"
+    },
+    outline_destructive: {
+      container_classes: "text-destructive border border-secondary bg-transparent hover:bg-gray-100 theme-dark:hover:bg-gray-700",
+      icon_classes: "fg-gray"
+    },
+    ghost: {
+      container_classes: "text-primary bg-transparent hover:bg-gray-100 theme-dark:hover:bg-gray-700",
+      icon_classes: "fg-gray"
+    },
+    icon: {
+      container_classes: "hover:bg-gray-100 theme-dark:hover:bg-gray-700",
+      icon_classes: "fg-gray"
+    },
+    icon_inverse: {
+      container_classes: "bg-inverse hover:bg-inverse-hover",
+      icon_classes: "fg-inverse"
+    }
+  }.freeze
+
+  SIZES = {
+    sm: {
+      container_classes: "px-2 py-1",
+      icon_container_classes: "inline-flex items-center justify-center w-8 h-8",
+      radius_classes: "rounded-md",
+      text_classes: "text-sm",
+      icon_classes: "w-4 h-4"
+    },
+    md: {
+      container_classes: "px-3 py-2",
+      icon_container_classes: "inline-flex items-center justify-center w-9 h-9",
+      radius_classes: "rounded-lg",
+      text_classes: "text-sm",
+      icon_classes: "w-5 h-5"
+    },
+    lg: {
+      container_classes: "px-4 py-3",
+      icon_container_classes: "inline-flex items-center justify-center w-10 h-10",
+      radius_classes: "rounded-xl",
+      text_classes: "text-base",
+      icon_classes: "w-6 h-6"
+    }
+  }.freeze
+
+  attr_reader :variant, :size, :href, :icon, :icon_position, :text, :full_width, :extra_classes, :frame, :opts
+
+  def initialize(variant: :primary, size: :md, href: nil, text: nil, icon: nil, icon_position: :left, full_width: false, frame: nil, **opts)
+    @variant = variant.to_s.underscore.to_sym
+    @size = size.to_sym
+    @href = href
+    @icon = icon
+    @icon_position = icon_position.to_sym
+    @text = text
+    @full_width = full_width
+    @extra_classes = opts.delete(:class)
+    @frame = frame
+    @opts = opts
+  end
+
+  def call
+    raise NotImplementedError, "ButtonishComponent is an abstract class and cannot be instantiated directly."
+  end
+
+  def container_classes(override_classes = nil)
+    class_names(
+      "font-medium whitespace-nowrap",
+      merged_base_classes,
+      full_width ? "w-full justify-center" : nil,
+      container_size_classes,
+      size_data.dig(:text_classes),
+      variant_data.dig(:container_classes)
+    )
+  end
+
+  def container_size_classes
+    icon_only? ? size_data.dig(:icon_container_classes) : size_data.dig(:container_classes)
+  end
+
+  def icon_classes
+    class_names(
+      size_data.dig(:icon_classes),
+      variant_data.dig(:icon_classes)
+    )
+  end
+
+  def icon_only?
+    variant.in?([ :icon, :icon_inverse ])
+  end
+
+  private
+    def variant_data
+      self.class::VARIANTS.dig(variant)
+    end
+
+    def size_data
+      self.class::SIZES.dig(size)
+    end
+
+    # Make sure that user can override common classes like `hidden`
+    def merged_base_classes
+      base_display_classes = "inline-flex items-center gap-1"
+      base_radius_classes = size_data.dig(:radius_classes)
+
+      extra_classes_list = (extra_classes || "").split
+
+      has_display_override = extra_classes_list.any? { |c| permitted_display_override_classes.include?(c) }
+      has_radius_override = extra_classes_list.any? { |c| permitted_radius_override_classes.include?(c) }
+
+      base_classes = []
+
+      unless has_display_override
+        base_classes << base_display_classes
+      end
+
+      unless has_radius_override
+        base_classes << base_radius_classes
+      end
+
+      class_names(
+        base_classes,
+        extra_classes
+      )
+    end
+
+    def permitted_radius_override_classes
+      [ "rounded-full" ]
+    end
+
+    def permitted_display_override_classes
+      [ "hidden", "flex" ]
+    end
+end