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-ai-core/src/provider.rs

@@ -95,14 +95,14 @@ impl ChatMessage {
     /// 无需每加一个状态就来这里改。当前取值 None/Some("active")/Some("truncated")
     /// 行为与旧反面排除完全等价（None=true / "active"=true / "truncated"=false）。
     pub fn is_active(&self) -> bool {
-        matches!(self.status.as_deref(), None | Some("active"))
+        matches!(self.status, None | Some(MessageStatus::Active))
     }
 }
 
 impl ToolDefinition {
     pub fn function(name: impl Into<String>, description: impl Into<String>, parameters: serde_json::Value) -> Self {
         Self {
-            tool_type: "function".into(),
+            tool_type: ToolType::new("function"),
             function: ToolFunction { name: name.into(), description: description.into(), parameters },
         }
     }
@@ -166,22 +166,22 @@ mod tests {
 
         // "active"
         let mut m = ChatMessage::user("hi");
-        m.status = Some("active".to_string());
+        m.status = Some(MessageStatus::Active);
         assert!(m.is_active(), "Some(active) 应 active");
 
         // "truncated" — 当前取值，与旧实现等价（false）
         let mut m = ChatMessage::user("hi");
-        m.status = Some("truncated".to_string());
+        m.status = Some(MessageStatus::Truncated);
         assert!(!m.is_active(), "truncated 应不 active");
 
         // "archived_segment" — 阶段2 待引入，白名单自动隔离
         let mut m = ChatMessage::user("hi");
-        m.status = Some("archived_segment".to_string());
+        m.status = Some(MessageStatus::ArchivedSegment);
         assert!(!m.is_active(), "archived_segment 应不 active（白名单隔离）");
 
         // "compressed" — 阶段2 待引入，白名单自动隔离
         let mut m = ChatMessage::user("hi");
-        m.status = Some("compressed".to_string());
+        m.status = Some(MessageStatus::Compressed);
         assert!(!m.is_active(), "compressed 应不 active（白名单隔离）");
     }
 

crates/df-ai-core/src/types.rs

@@ -103,11 +103,11 @@ pub struct ChatMessage {
     /// 生成该消息的 model（仅 assistant 消息有，消息级 model 追溯）
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub model: Option<String>,
-    /// 消息状态（UX-09 编辑重生成）：None/"active" 正常可见；
+    /// 消息状态（UX-09 编辑重生成）：None 正常可见；
     /// "truncated" 软删（编辑某条 user 消息后其后续消息标记，保留 DB 可追溯但不进 LLM 上下文、前端视图过滤）
     /// 默认 None（向前兼容老 JSON 反序列化）。落库随 messages JSON 序列化，无需独立列。
     #[serde(default, skip_serializing_if = "Option::is_none")]
-    pub status: Option<String>,
+    pub status: Option<MessageStatus>,
     /// DeepSeek thinking 模式的推理内容（多轮需回传）
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub reasoning_content: Option<String>,
@@ -148,11 +148,91 @@ pub enum MessageRole {
     Tool,
 }
 
+/// 消息状态枚举（IPC 边界序列化为小写 snake_case 字符串）
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+#[serde(rename_all = "snake_case")]
+pub enum MessageStatus {
+    /// 正常可见
+    Active,
+    /// 软删（编辑某条 user 消息后其后续消息标记）
+    Truncated,
+    /// 已压缩
+    Compressed,
+    /// 已归档段
+    ArchivedSegment,
+}
+
+impl MessageStatus {
+    /// DB 存储用的小写 snake_case 字符串
+    pub fn as_db_str(&self) -> &'static str {
+        match self {
+            MessageStatus::Active => "active",
+            MessageStatus::Truncated => "truncated",
+            MessageStatus::Compressed => "compressed",
+            MessageStatus::ArchivedSegment => "archived_segment",
+        }
+    }
+
+    /// 从 DB 字符串解析
+    pub fn from_db_str(s: &str) -> Option<Self> {
+        Some(match s {
+            "active" => MessageStatus::Active,
+            "truncated" => MessageStatus::Truncated,
+            "compressed" => MessageStatus::Compressed,
+            "archived_segment" => MessageStatus::ArchivedSegment,
+            _ => return None,
+        })
+    }
+}
+
+/// ChatMessage 结构体
+/// 工具类型（IPC 边界透明序列化为字符串，如 "function"）
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq, Hash)]
+#[serde(transparent)]
+pub struct ToolType(String);
+
+impl ToolType {
+    /// 构造新工具类型
+    pub fn new(s: impl Into<String>) -> Self {
+        Self(s.into())
+    }
+}
+
+impl std::fmt::Display for ToolType {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl From<String> for ToolType {
+    fn from(s: String) -> Self {
+        Self(s)
+    }
+}
+
+impl From<&str> for ToolType {
+    fn from(s: &str) -> Self {
+        Self(s.to_owned())
+    }
+}
+
+impl PartialEq<&str> for ToolType {
+    fn eq(&self, other: &&str) -> bool {
+        self.0 == *other
+    }
+}
+
+impl PartialEq<str> for ToolType {
+    fn eq(&self, other: &str) -> bool {
+        self.0 == other
+    }
+}
+
 /// 工具定义
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct ToolDefinition {
     #[serde(rename = "type")]
-    pub tool_type: String,
+    pub tool_type: ToolType,
     pub function: ToolFunction,
 }
 
@@ -169,7 +249,7 @@ pub struct ToolFunction {
 pub struct ToolCall {
     pub id: String,
     #[serde(rename = "type")]
-    pub call_type: String,
+    pub call_type: ToolType,
     pub function: ToolCallFunction,
 }