New Design System + Codebase Refresh (#1823)

Since the very first 0.1.0-alpha.1 release, we've been moving quickly to add new features to the Maybe app. In doing so, some parts of the codebase have become outdated, unnecessary, or overly-complex as a natural result of this feature prioritization.

Now that "core" Maybe is complete, we're moving into a second phase of development where we'll be working hard to improve the accuracy of existing features and build additional features on top of "core". This PR is a quick overhaul of the existing codebase aimed to:

- Establish the brand new and simplified dashboard view (pictured above)
- Establish and move towards the conventions introduced in Cursor rules and project design overview #1788
- Consolidate layouts and improve the performance of layout queries
- Organize the core models of the Maybe domain (i.e. Account::Entry, Account::Transaction, etc.) and break out specific traits of each model into dedicated concerns for better readability
- Remove stale / dead code from codebase
- Remove overly complex code paths in favor of simpler ones

app/views/pages/changelog.html.erb

@@ -1,30 +1,21 @@
-<% content_for :sidebar do %>
-  <%= render "settings/nav" %>
-<% end %>
+<%= content_for :page_title, t(".title") %>
 
-<div class="space-y-4 flex flex-col h-full">
-  <h1 class="text-primary text-xl font-medium mb-4"><%= t(".title") %></h1>
-  <div class="bg-white shadow-xs border border-alpha-black-25 rounded-xl p-4 grow overflow-y-auto">
-    <div class="flex justify-between gap-4 mb-12 last:mb-0">
-      <div class="w-1/3">
-        <div class="px-3 flex items-center gap-3">
-          <div class="text-white shrink-0 w-9 h-9">
-            <%= image_tag @release_notes[:avatar], class: "rounded-full w-full h-full object-cover" %>
-          </div>
-          <div>
-            <a class="text-primary font-medium text-sm" href="https://github.com/<%= @release_notes[:username] %>"><%= "@#{@release_notes[:username]}" %></a>
-            <div class="text-secondary text-sm"><%= @release_notes[:published_at].strftime("%B %d, %Y") %></div>
-          </div>
+<div class="bg-white shadow-border-xs rounded-xl p-4 grow overflow-y-auto">
+  <div class="flex justify-between gap-4 mb-12 last:mb-0">
+    <div class="w-1/3">
+      <div class="px-3 flex items-center gap-3">
+        <div class="text-white shrink-0 w-9 h-9">
+          <%= image_tag @release_notes[:avatar], class: "rounded-full w-full h-full object-cover" %>
+        </div>
+        <div>
+          <a class="text-primary font-medium text-sm" href="https://github.com/<%= @release_notes[:username] %>"><%= "@#{@release_notes[:username]}" %></a>
+          <div class="text-secondary text-sm"><%= @release_notes[:published_at].strftime("%B %d, %Y") %></div>
         </div>
       </div>
-      <div class="w-2/3 text-secondary text-sm prose prose--github-release-notes">
-        <h2 class="mb-5 text-xl text-primary"><%= @release_notes[:name] %></h2>
-        <%= @release_notes[:body].html_safe %>
-      </div>
+    </div>
+    <div class="w-2/3 text-secondary text-sm prose prose--github-release-notes">
+      <h2 class="mb-5 text-xl text-primary"><%= @release_notes[:name] %></h2>
+      <%= @release_notes[:body].html_safe %>
     </div>
   </div>
-
-  <div class="mt-auto">
-    <%= settings_nav_footer %>
-  </div>
 </div>