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/shared/_form_errors.html.erb

@@ -1,6 +1,6 @@
 <%# locals: (model:) %>
 
 <div class="flex items-center gap-2">
-  <%= lucide_icon("alert-circle", class: "text-red-500 w-4 h-4 shrink-0") %>
-  <p class="text-red-500 text-sm"><%= model.errors.full_messages.to_sentence %></p>
+  <%= icon("alert-circle", size: "sm", color: "destructive") %>
+  <p class="text-destructive text-sm"><%= model.errors.full_messages.to_sentence %></p>
 </div>