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/valuations/index.html.erb

@@ -5,7 +5,9 @@
       <%= link_to new_valuation_path(@account),
                   data:  { turbo_frame: dom_id(@account.entries.valuations.new) },
                   class: "flex gap-1 font-medium items-center bg-gray-50 text-primary p-2 rounded-lg" do %>
-        <%= lucide_icon("plus", class: "w-5 h-5 text-primary") %>
+        <span class="text-primary">
+          <%= icon("plus", color: "current") %>
+        </span>
         <%= tag.span t(".new_entry"), class: "text-sm" %>
       <% end %>
     </div>