Implement better mapping

app/helpers/accounts_helper.rb

@@ -3,26 +3,4 @@ module AccountsHelper
     content = capture(&block)
     render "accounts/summary_card", title: title, content: content
   end
-
-  # Format account subtype to be more friendly
-  def format_account_subtype(subtype)
-    return nil if subtype.nil?
-
-    # Mapping of special cases
-    special_cases = {
-      "ira" => "IRA",
-      "401k" => "401(k)",
-      "hsa" => "HSA"
-    }
-
-    # Convert to title case
-    subtype_string = subtype.titleize
-
-    special_cases.each do |key, value|
-      # Use word boundaries to ensure we're replacing whole words
-      subtype_string = subtype_string.gsub(/\b#{key}\b/i, value)
-    end
-
-    subtype_string
-  end
 end

app/models/balance_sheet.rb

@@ -59,6 +59,12 @@ class BalanceSheet
           account.define_singleton_method(:weight) do
             classification_total.zero? ? 0 : account.converted_balance / classification_total.to_d * 100
           end
+          
+          # Define our subtype labeling logic
+          account.define_singleton_method(:subtype_label) do
+            accountable.subtype_label_for(account.subtype) || accountable.display_name
+          end
+          
           account
         end.sort_by(&:weight).reverse
       )

app/models/concerns/accountable.rb

@@ -2,6 +2,9 @@ module Accountable
   extend ActiveSupport::Concern
 
   TYPES = %w[Depository Investment Crypto Property Vehicle OtherAsset CreditCard Loan OtherLiability]
+  
+  # Define empty array to ensure all accountables have this defined
+  SUBTYPES = []
 
   def self.from_type(type)
     return nil unless TYPES.include?(type)
@@ -27,6 +30,11 @@ module Accountable
       raise NotImplementedError, "Accountable must implement #color"
     end
 
+    # Given a subtype, look up the "label" for this accountable type
+    def subtype_label_for(subtype)
+      self::SUBTYPES.find { |subtype_label, subtype_value| subtype_value == subtype }&.first
+    end
+
     def favorable_direction
       classification == "asset" ? "up" : "down"
     end

app/views/accounts/_accountable_group.html.erb

@@ -24,7 +24,7 @@
 
         <div class="min-w-0 grow">
           <%= tag.p account.name, class: "text-sm text-primary font-medium mb-0.5 truncate" %>
-          <%= tag.p format_account_subtype(account.subtype).presence || account_group.name, class: "text-sm text-secondary truncate" %>
+          <%= tag.p account.subtype_label, class: "text-sm text-secondary truncate" %>
         </div>
 
         <div class="ml-auto text-right grow h-10">