feat: 初始化 git-air AI 代码评审 CLI 工具

新增多模型 LLM 客户端、Git diff 提取与过滤、配置管理及 pre-commit 钩子支持。

cmd/hook.go

@@ -0,0 +1,60 @@
+package cmd
+
+import (
+	"git-air/internal/git"
+	"git-air/internal/ui"
+	"os"
+	"path/filepath"
+
+	"github.com/spf13/cobra"
+)
+
+const preCommitScript = `#!/bin/sh
+# git-air pre-commit hook
+echo "[git-air] 正在执行 Commit 前代码自动化评审..."
+git-air --cached
+# 如果评审发现阻断性问题，可通过退出码阻断 commit
+`
+
+var hookCmd = &cobra.Command{
+	Use:   "hook",
+	Short: "管理 Git Pre-commit 自动审查钩子",
+}
+
+var hookInstallCmd = &cobra.Command{
+	Use:   "install",
+	Short: "在当前仓库一键安装 pre-commit 钩子",
+	Run: func(cmd *cobra.Command, args []string) {
+		repoRoot, err := git.GetRepoRoot(cmd.Context())
+		if err != nil {
+			ui.PrintError("请在 Git 仓库根目录下执行此命令")
+			return
+		}
+		hookPath := filepath.Join(repoRoot, ".git", "hooks", "pre-commit")
+		if err := os.WriteFile(hookPath, []byte(preCommitScript), 0755); err != nil {
+			ui.PrintError("写入 hook 文件失败: %v", err)
+			return
+		}
+		ui.PrintSuccess("已成功安装 pre-commit 钩子！每次执行 git commit 时将自动触发评审。")
+	},
+}
+
+var hookUninstallCmd = &cobra.Command{
+	Use:   "uninstall",
+	Short: "移除当前仓库的 pre-commit 钩子",
+	Run: func(cmd *cobra.Command, args []string) {
+		repoRoot, err := git.GetRepoRoot(cmd.Context())
+		if err != nil {
+			ui.PrintError("请在 Git 仓库根目录下执行此命令")
+			return
+		}
+		hookPath := filepath.Join(repoRoot, ".git", "hooks", "pre-commit")
+		_ = os.Remove(hookPath)
+		ui.PrintSuccess("已成功卸载 pre-commit 钩子！")
+	},
+}
+
+func init() {
+	hookCmd.AddCommand(hookInstallCmd)
+	hookCmd.AddCommand(hookUninstallCmd)
+}