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 In doing so, some parts of the codebase have become outdated, unnecessary, or overly-complex as a natural result of this feature prioritization.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/accounts/show/_activity.html.erb

@@ -1,7 +1,7 @@
 <%# locals: (account:) %>
 
 <%= turbo_frame_tag dom_id(account, "entries") do %>
-  <div class="bg-white p-5 border border-alpha-black-25 rounded-xl shadow-xs" data-controller="focus-record" data-focus-record-id-value="<%= @focused_record ? dom_id(@focused_record) : nil %>">
+  <div class="bg-white p-5 shadow-border-xs rounded-xl" data-controller="focus-record" data-focus-record-id-value="<%= @focused_record ? dom_id(@focused_record) : nil %>">
     <div class="flex items-center justify-between mb-4">
       <%= tag.h2 t(".title"), class: "font-medium text-lg" %>
       <% unless @account.plaid_account_id.present? %>
@@ -77,16 +77,16 @@
           <div class="rounded-tl-lg rounded-tr-lg bg-white border-alpha-black-25 shadow-xs">
             <div class="space-y-4">
               <% calculator = Account::BalanceTrendCalculator.for(@entries) %>
-              <%= entries_by_date(@entries) do |entries, _transfers| %>
+              <%= entries_by_date(@entries) do |entries| %>
                 <% entries.each do |entry| %>
-                  <%= render entry, balance_trend: calculator&.trend_for(entry) %>
+                  <%= render entry, balance_trend: calculator&.trend_for(entry), view_ctx: "account" %>
                 <% end %>
               <% end %>
             </div>
           </div>
 
           <div class="p-4 bg-white rounded-bl-lg rounded-br-lg">
-            <%= render "pagination", pagy: @pagy %>
+            <%= render "shared/pagination", pagy: @pagy %>
           </div>
         </div>
       <% end %>