revert: tea 1.0 rewrite (#1122–#1126) (#1146)

Reverts #1126, #1125, #1124, #1123 and #1122.

`go.mod` keeps the Go 1.26 line with toolchain `go1.26.9` (instead of the original `go1.26.6`) so the security fix from #1131 isn't lost.

reopens #69
reopens #141
reopens #162
reopens #172
reopens #197
reopens #232
reopens #240
reopens #246
reopens #323
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reopens #1110
reopens #1115
reopens #1116
reopens #1118

Reviewed-on: https://gitea.com/gitea/tea/pulls/1146
Reviewed-by: TheFox0x7 <95654+thefox0x7@noreply.gitea.com>

tests/integration/git_repo_test.go

@@ -0,0 +1,57 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package integration
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	teagit "gitea.dev/tea/modules/git"
+)
+
+func TestRepoFromPath_Worktree(t *testing.T) {
+	tmpDir, err := os.MkdirTemp("", "tea-worktree-test-*")
+	assert.NoError(t, err)
+	defer os.RemoveAll(tmpDir)
+
+	mainRepoPath := filepath.Join(tmpDir, "main-repo")
+	worktreePath := filepath.Join(tmpDir, "worktree")
+
+	cmd := exec.Command("git", "init", mainRepoPath)
+	assert.NoError(t, cmd.Run())
+
+	cmd = exec.Command("git", "-C", mainRepoPath, "config", "user.email", "test@example.com")
+	assert.NoError(t, cmd.Run())
+	cmd = exec.Command("git", "-C", mainRepoPath, "config", "user.name", "Test User")
+	assert.NoError(t, cmd.Run())
+	cmd = exec.Command("git", "-C", mainRepoPath, "config", "commit.gpgsign", "false")
+	assert.NoError(t, cmd.Run())
+
+	cmd = exec.Command("git", "-C", mainRepoPath, "remote", "add", "origin", "https://gitea.com/owner/repo.git")
+	assert.NoError(t, cmd.Run())
+
+	readmePath := filepath.Join(mainRepoPath, "README.md")
+	err = os.WriteFile(readmePath, []byte("# Test Repo\n"), 0o644)
+	assert.NoError(t, err)
+	cmd = exec.Command("git", "-C", mainRepoPath, "add", "README.md")
+	assert.NoError(t, cmd.Run())
+	cmd = exec.Command("git", "-C", mainRepoPath, "commit", "-m", "Initial commit")
+	assert.NoError(t, cmd.Run())
+
+	cmd = exec.Command("git", "-C", mainRepoPath, "worktree", "add", worktreePath, "-b", "test-branch")
+	assert.NoError(t, cmd.Run())
+
+	repo, err := teagit.RepoFromPath(worktreePath)
+	assert.NoError(t, err, "Should be able to open worktree")
+
+	config, err := repo.Config()
+	assert.NoError(t, err, "Should be able to read config")
+	assert.NotEmpty(t, config.Remotes, "Should be able to read remotes from worktree")
+	assert.Contains(t, config.Remotes, "origin", "Should have origin remote")
+	assert.Equal(t, "https://gitea.com/owner/repo.git", config.Remotes["origin"].URLs[0], "Should have correct remote URL")
+}