feat(ui): add links to review request targets in issue comments (#8239)

- Add links to review request targets in issue comments
- Fix links to ghost users/orgs/teams to be empty

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/8239
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: Robert Wolff <mahlzahn@posteo.de>
Co-committed-by: Robert Wolff <mahlzahn@posteo.de>

models/issues/action_aggregator_test.go

@@ -0,0 +1,37 @@
+// Copyright 2025 The Forgejo Authors. All rights reserved.
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package issues
+
+import (
+	"testing"
+
+	"forgejo.org/models/db"
+	org_model "forgejo.org/models/organization"
+	"forgejo.org/models/unittest"
+	user_model "forgejo.org/models/user"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestRequestReviewTarget(t *testing.T) {
+	unittest.PrepareTestEnv(t)
+
+	target := RequestReviewTarget{User: &user_model.User{ID: 1, Name: "user1"}}
+	assert.Equal(t, int64(1), target.ID())
+	assert.Equal(t, "user1", target.Name())
+	assert.Equal(t, "user", target.Type())
+	assert.Equal(t, "/user1", target.Link(db.DefaultContext))
+
+	target = RequestReviewTarget{Team: &org_model.Team{ID: 2, Name: "Collaborators", OrgID: 3}}
+	assert.Equal(t, int64(2), target.ID())
+	assert.Equal(t, "Collaborators", target.Name())
+	assert.Equal(t, "team", target.Type())
+	assert.Equal(t, "/org/org3/teams/Collaborators", target.Link(db.DefaultContext))
+
+	target = RequestReviewTarget{Team: org_model.NewGhostTeam()}
+	assert.Equal(t, int64(-1), target.ID())
+	assert.Equal(t, "Ghost team", target.Name())
+	assert.Equal(t, "team", target.Type())
+	assert.Empty(t, target.Link(db.DefaultContext))
+}