chore: initialize Gitea v1.27.2 fork

Includes direct password setup links in registration emails.

Assisted-by: Codex:GPT-5

modules/repository/fork.go

@@ -0,0 +1,43 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package repository
+
+import (
+	"context"
+
+	"gitea.dev/models/organization"
+	repo_model "gitea.dev/models/repo"
+	user_model "gitea.dev/models/user"
+	"gitea.dev/modules/setting"
+)
+
+// CanUserForkBetweenOwners returns true if user can fork between owners.
+// By default, a user can fork a repository from another owner, but not from themselves.
+// Many users really like to fork their own repositories, so add an experimental setting to allow this.
+func CanUserForkBetweenOwners(id1, id2 int64) bool {
+	if id1 != id2 {
+		return true
+	}
+	return setting.Repository.AllowForkIntoSameOwner
+}
+
+// CanUserForkRepo returns true if specified user can fork repository.
+func CanUserForkRepo(ctx context.Context, user *user_model.User, repo *repo_model.Repository) (bool, error) {
+	if user == nil {
+		return false, nil
+	}
+	if CanUserForkBetweenOwners(repo.OwnerID, user.ID) && !repo_model.HasForkedRepo(ctx, user.ID, repo.ID) {
+		return true, nil
+	}
+	ownedOrgs, err := organization.GetOrgsCanCreateRepoByUserID(ctx, user.ID)
+	if err != nil {
+		return false, err
+	}
+	for _, org := range ownedOrgs {
+		if repo.OwnerID != org.ID && !repo_model.HasForkedRepo(ctx, org.ID, repo.ID) {
+			return true, nil
+		}
+	}
+	return false, nil
+}