Allow user to add buy and sell trade transactions for investment accounts (#1066)

* Consolidate modal form structure into partial + helper

* Scaffold out trade transaction form

* Normalize translations

* Add buy and sell trade form with tests

* Move entryable lists to dedicated controllers

* Delegate entry group contents rendering

* More cleanup

* Extract transaction and valuation update logic from entries controller

* Delegate edit and show actions to entryables

* Trade builder

* Update paths for transaction updates

test/system/trades_test.rb

@@ -0,0 +1,67 @@
+require "application_system_test_case"
+
+class TradesTest < ApplicationSystemTestCase
+  include ActiveJob::TestHelper
+
+  setup do
+    sign_in @user = users(:family_admin)
+
+    @account = accounts(:investment)
+
+    visit_account_trades
+  end
+
+  test "can create buy transaction" do
+    shares_qty = 25.0
+
+    open_new_trade_modal
+
+    fill_in "Ticker symbol", with: "NVDA"
+    fill_in "Date", with: Date.current
+    fill_in "Quantity", with: shares_qty
+    fill_in "account_entry[price]", with: 214.23
+
+    click_button "Add transaction"
+
+    visit_account_trades
+
+    within_trades do
+      assert_text "Purchase 10 shares of AAPL"
+      assert_text "Buy #{shares_qty} shares of NVDA"
+    end
+  end
+
+  test "can create sell transaction" do
+    aapl = @account.holdings.current.find { |h| h.security.ticker == "AAPL" }
+
+    open_new_trade_modal
+
+    select "Sell", from: "Type"
+    fill_in "Ticker symbol", with: aapl.ticker
+    fill_in "Date", with: Date.current
+    fill_in "Quantity", with: aapl.qty
+    fill_in "account_entry[price]", with: 215.33
+
+    click_button "Add transaction"
+
+    visit_account_trades
+
+    within_trades do
+      assert_text "Sell #{aapl.qty} shares of AAPL"
+    end
+  end
+
+  private
+
+    def open_new_trade_modal
+      click_link "new_trade_account_#{@account.id}"
+    end
+
+    def within_trades(&block)
+      within "#" + dom_id(@account, "trades"), &block
+    end
+
+    def visit_account_trades
+      visit account_url(@account, tab: "trades")
+    end
+end