Add breadcrumbs support across application (#1897)

* Add breadcrumbs support across application

Fixes #1896

* Potential fix for tests

* Simplify breadcrumbs implementation

Remove complex breadcrumbs logic from controllers and concern, replacing with a simpler default approach that sets a basic breadcrumb based on the current controller name

* Refactor page header and breadcrumbs rendering

Remove complex breadcrumbs helper method and update layout to use more flexible content_for approach for page headers and breadcrumbs

* Add fallback breadcrumbs rendering to settings layout

app/views/pages/dashboard.html.erb

@@ -1,23 +1,11 @@
+<% content_for :page_header do %>
+  <div class="space-y-1 mb-6">
+    <h1 class="text-3xl font-medium text-gray-900">Welcome back, <%= Current.user.first_name %></h1>
+    <p class="text-gray-500">Here's what's happening with your money this week</p>
+  </div>
+<% end %>
+
 <div class="w-full space-y-6 pb-24">
-  <header class="space-y-6">
-    <nav class="flex items-center gap-2">
-      <button data-action="sidebar#toggle" class="w-9 h-9 inline-flex rounded-lg items-center justify-center hover:bg-gray-100 cursor-pointer">
-        <%= icon("panel-left", color: "gray") %>
-      </button>
-
-      <span class="text-sm text-gray-500 font-medium">Home</span>
-
-      <%= icon("chevron-right", color: "gray", size: "sm") %>
-
-      <span class="text-gray-900 font-medium text-sm">Dashboard</span>
-    </nav>
-
-    <div class="space-y-1">
-      <h1 class="text-3xl font-medium text-gray-900">Welcome back, <%= Current.user.first_name %></h1>
-      <p class="text-gray-500">Here's what's happening with your money this week</p>
-    </div>
-  </header>
-
   <section class="bg-white py-4 rounded-xl shadow-border-xs">
     <%= render partial: "pages/dashboard/net_worth_chart", locals: { series: @balance_sheet.net_worth_series(period: @period), period: @period } %>
   </section>