重构: String→newtype 强类型 + 工程清理

- df-types: ExecutionId/ToolCallType 从 type 别名改为 newtype 结构体
- df-ai-core: 新增 ToolType newtype / MessageStatus 枚举,
  ChatMessage.status 从 Option<String> 改为 Option<MessageStatus>
- provider: is_active() 改用 MessageStatus::Active 模式匹配
- context/chat/conversation: 构造站点更新为枚举变体
- .gitignore: 添加分析脚本排除项,清理根目录临时文件
- Batch.md: 更新最新提交与新增 Batch 37 记录

crates/df-types/src/types.rs

@@ -22,8 +22,68 @@ pub type ReleaseId = String;
 pub type BranchId = String;
 /// 插件 ID
 pub type PluginId = String;
-/// 执行 ID
-pub type ExecutionId = String;
+/// 执行 ID(IPC 边界透明序列化为字符串)
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Hash, Default)]
+#[serde(transparent)]
+pub struct ExecutionId(String);
+
+impl ExecutionId {
+    /// 构造新执行 ID
+    pub fn new(s: impl Into<String>) -> Self {
+        Self(s.into())
+    }
+}
+
+impl std::fmt::Display for ExecutionId {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl std::ops::Deref for ExecutionId {
+    type Target = str;
+    fn deref(&self) -> &str {
+        &self.0
+    }
+}
+
+impl From<String> for ExecutionId {
+    fn from(s: String) -> Self {
+        Self(s)
+    }
+}
+
+impl From<&str> for ExecutionId {
+    fn from(s: &str) -> Self {
+        Self(s.to_owned())
+    }
+}
+
+impl From<ExecutionId> for String {
+    fn from(id: ExecutionId) -> Self {
+        id.0
+    }
+}
+
+// ExecutionId 与 &str 的比较(测试/匹配中大量使用)
+impl PartialEq<&str> for ExecutionId {
+    fn eq(&self, other: &&str) -> bool {
+        self.0 == *other
+    }
+}
+
+impl PartialEq<str> for ExecutionId {
+    fn eq(&self, other: &str) -> bool {
+        self.0 == other
+    }
+}
+
+impl PartialEq<String> for ExecutionId {
+    fn eq(&self, other: &String) -> bool {
+        self.0 == *other
+    }
+}
+
 /// 决策 ID
 pub type DecisionId = String;
 /// 节点类型(如 ai / human / ai_self_review)
@@ -31,7 +91,47 @@ pub type NodeType = String;
 /// 任务链接类型(如 depends_on / blocks / relates_to)
 pub type LinkType = String;
 /// 工具调用类型(如 function)
-pub type ToolCallType = String;
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Hash, Default)]
+#[serde(transparent)]
+pub struct ToolCallType(String);
+
+impl ToolCallType {
+    /// 构造新工具调用类型
+    pub fn new(s: impl Into<String>) -> Self {
+        Self(s.into())
+    }
+}
+
+impl std::fmt::Display for ToolCallType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl std::ops::Deref for ToolCallType {
+    type Target = str;
+    fn deref(&self) -> &str {
+        &self.0
+    }
+}
+
+impl From<String> for ToolCallType {
+    fn from(s: String) -> Self {
+        Self(s)
+    }
+}
+
+impl From<&str> for ToolCallType {
+    fn from(s: &str) -> Self {
+        Self(s.to_owned())
+    }
+}
+
+impl From<ToolCallType> for String {
+    fn from(t: ToolCallType) -> Self {
+        t.0
+    }
+}
 
 // ============================================================
 // 时间工具