Transfer and Payment auto-matching, model and UI improvements (#1585)

* Transfer data model migration

* Transfers and payment modeling and UI improvements

* Fix CI

* Transfer matching flow

* Better UI for transfers

* Auto transfer matching, approve, reject flow

* Mark transfers created from form as confirmed

* Account filtering

* Excluded rejected transfers from calculations

* Calculation tweaks with transfer exclusions

* Clean up migration

test/controllers/account/transfer_matches_controller_test.rb

@@ -0,0 +1,42 @@
+require "test_helper"
+
+class Account::TransferMatchesControllerTest < ActionDispatch::IntegrationTest
+  include Account::EntriesTestHelper
+
+  setup do
+    sign_in @user = users(:family_admin)
+  end
+
+  test "matches existing transaction and creates transfer" do
+    inflow_transaction = create_transaction(amount: 100, account: accounts(:depository))
+    outflow_transaction = create_transaction(amount: -100, account: accounts(:investment))
+
+    assert_difference "Transfer.count", 1 do
+      post account_transaction_transfer_match_path(inflow_transaction), params: {
+        transfer_match: {
+          method: "existing",
+          matched_entry_id: outflow_transaction.id
+        }
+      }
+    end
+
+    assert_redirected_to transactions_url
+    assert_equal "Transfer created", flash[:notice]
+  end
+
+  test "creates transfer for target account" do
+    inflow_transaction = create_transaction(amount: 100, account: accounts(:depository))
+
+    assert_difference [ "Transfer.count", "Account::Entry.count", "Account::Transaction.count" ], 1 do
+      post account_transaction_transfer_match_path(inflow_transaction), params: {
+        transfer_match: {
+          method: "new",
+          target_account_id: accounts(:investment).id
+        }
+      }
+    end
+
+    assert_redirected_to transactions_url
+    assert_equal "Transfer created", flash[:notice]
+  end
+end