Add Property Details View (#1116)

* Add backend for property account details

* Rubocop updates

* Add property form with details

* Revert "Rubocop updates"

This reverts commit 05b0b8f3a4.

* Bump brakeman to latest version

* Add overview section to property view

* Lint fixes

app/models/property.rb

@@ -1,3 +1,30 @@
 class Property < ApplicationRecord
   include Accountable
+
+  has_one :address, as: :addressable, dependent: :destroy
+
+  accepts_nested_attributes_for :address
+
+  attribute :area_unit, :string, default: "sqft"
+
+  def area
+    Measurement.new(area_value, area_unit) if area_value.present?
+  end
+
+  def purchase_price
+    first_valuation_amount
+  end
+
+  def equity_value
+    account.balance_money
+  end
+
+  def trend
+    TimeSeries::Trend.new(current: account.balance_money, previous: first_valuation_amount)
+  end
+
+  private
+    def first_valuation_amount
+      account.entries.account_valuations.order(:date).first&.amount_money || account.balance_money
+    end
 end