✨ feat(commands)：为所有命令添加config_path参数支持，实现自定义配置文件路径

♻️ refactor(config)：重构ConfigManager，添加with_path_fresh方法用于初始化新配置
🔧 fix(git)：改进跨平台路径处理，增强git仓库检测的鲁棒性
✅ test(tests)：添加全面的集成测试，覆盖所有命令和跨平台场景

src/git/commit.rs

@@ -47,6 +47,12 @@ impl CommitBuilder {
         self
     }
 
+    /// Set scope (optional)
+    pub fn scope_opt(mut self, scope: Option<String>) -> Self {
+        self.scope = scope;
+        self
+    }
+
     /// Set description
     pub fn description(mut self, description: impl Into<String>) -> Self {
         self.description = Some(description.into());
@@ -59,6 +65,12 @@ impl CommitBuilder {
         self
     }
 
+    /// Set body (optional)
+    pub fn body_opt(mut self, body: Option<String>) -> Self {
+        self.body = body;
+        self
+    }
+
     /// Set footer
     pub fn footer(mut self, footer: impl Into<String>) -> Self {
         self.footer = Some(footer.into());