[feature] Admin accounts endpoints; approve/reject sign-ups (#2826)

* update settings panels, add pending overview + approve/deny functions

* add admin accounts get, approve, reject

* send approved/rejected emails

* use signup URL

* docs!

* email

* swagger

* web linting

* fix email tests

* wee lil fixerinos

* use new paging logic for GetAccounts() series of admin endpoints, small changes to query building

* shuffle useAccountIDIn check *before* adding to query

* fix parse from toot react error

* use `netip.Addr`

* put valid slices in globals

* optimistic updates for account state

---------

Co-authored-by: kim <grufwub@gmail.com>

internal/processing/admin/accountapprove_test.go

@@ -0,0 +1,75 @@
+// GoToSocial
+// Copyright (C) GoToSocial Authors admin@gotosocial.org
+// SPDX-License-Identifier: AGPL-3.0-or-later
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+package admin_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/suite"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/testrig"
+)
+
+type AdminApproveTestSuite struct {
+	AdminStandardTestSuite
+}
+
+func (suite *AdminApproveTestSuite) TestApprove() {
+	var (
+		ctx        = context.Background()
+		adminAcct  = suite.testAccounts["admin_account"]
+		targetAcct = suite.testAccounts["unconfirmed_account"]
+		targetUser = new(gtsmodel.User)
+	)
+
+	// Copy user since we're modifying it.
+	*targetUser = *suite.testUsers["unconfirmed_account"]
+
+	// Approve the sign-up.
+	acct, errWithCode := suite.adminProcessor.AccountApprove(
+		ctx,
+		adminAcct,
+		targetAcct.ID,
+	)
+	if errWithCode != nil {
+		suite.FailNow(errWithCode.Error())
+	}
+
+	// Account should be approved.
+	suite.NotNil(acct)
+	suite.True(acct.Approved)
+	suite.Nil(acct.IP)
+
+	// Wait for processor to
+	// handle side effects.
+	var (
+		dbUser *gtsmodel.User
+		err    error
+	)
+	if !testrig.WaitFor(func() bool {
+		dbUser, err = suite.state.DB.GetUserByID(ctx, targetUser.ID)
+		return err == nil && dbUser != nil && *dbUser.Approved
+	}) {
+		suite.FailNow("waiting for approved user")
+	}
+}
+
+func TestAdminApproveTestSuite(t *testing.T) {
+	suite.Run(t, new(AdminApproveTestSuite))
+}