重构: 前端DRY收口+后端测试类型对齐

- 新增 useToast composable: 消除 AiChat/Settings/Projects 4处 toast 重复
  统一默认3000ms(Projects原4000ms为操作类提示保留参数覆盖)
- 新增 utils/json.ts parseJsonArray: 消除 parseStack/parseTags/ModuleNode
  3处JSON字符串数组解析重复
- 新增 utils/html.ts escapeHtml: 消除 useMarkdown/FilePreview 2处重复
- ProjectDetail score-bar 内联三元改用 scoreTier(消除最后一处阈值硬编码)
- ConversationSidebar 删除 formatTime 透传包装(直接用 formatRelative)
- 清理死代码: parseTs/stringifyError/ErrorSink/_Unused 改私有或删除
  wrapNakedDiff 改私有(无外部 import)
- ModuleNode shortPath 改名 truncatedPath(与 useToolCard.shortPath 语义不同)

src-tauri/src/commands/ai/audit/mod.rs

@@ -485,6 +485,7 @@ pub(crate) async fn process_tool_calls(
 #[cfg(test)]
 mod tests {
     use super::*;
+    use super::path_auth::extract_file_tool_paths;
 
     /// grep 走单路径授权申请路径（NeedsAuth），非 search_files 盲拒（Denied）。
     ///

src-tauri/src/commands/ai/augmentation/inject.rs

@@ -189,6 +189,7 @@ mod tests {
             status: ProjectStatus::InProgress,
             description: "AI-native dev tool".into(),
             path: Some(SanitizedPath::new("E:/wk-lab/devflow")),
+            extra: vec![],
         };
         let seg = build_augmentation_segment(&[aug], "zh");
         assert!(seg.starts_with("--- 以下是用户选择的上下文参考"), "头部应隔离标注, got: {}", seg);
@@ -206,6 +207,7 @@ mod tests {
             status: TaskStatus::Todo,
             description: "do X".into(),
             project_name: Some("devflow".into()),
+            extra: vec![],
         };
         let seg = build_augmentation_segment(&[aug], "zh");
         assert!(seg.contains("【任务】Implement X"));
@@ -234,6 +236,7 @@ mod tests {
                 title: "Idea1".into(),
                 status: IdeaStatus::Approved,
                 description: String::new(),
+                extra: vec![],
             },
             Augmentation::Project {
                 id: "p1".into(),
@@ -241,6 +244,7 @@ mod tests {
                 status: ProjectStatus::Planning,
                 description: String::new(),
                 path: None,
+                extra: vec![],
             },
         ];
         let seg = build_augmentation_segment(&augs, "zh");
@@ -258,6 +262,7 @@ mod tests {
             title: "Idea1".into(),
             status: IdeaStatus::Approved,
             description: String::new(),
+            extra: vec![],
         };
         let seg = build_augmentation_segment(&[aug], "en");
         assert!(seg.starts_with("--- The following is the context"), "en 头部: {}", seg);
@@ -271,6 +276,7 @@ mod tests {
             title: "Idea1".into(),
             status: IdeaStatus::Approved,
             description: String::new(),
+            extra: vec![],
         };
         let seg = build_augmentation_segment(&[aug], "fr");
         assert!(seg.starts_with("--- 以下是用户选择的上下文参考"), "未知 lang 应按 zh 兜底");
@@ -284,6 +290,7 @@ mod tests {
             status: ProjectStatus::Planning,
             description: String::new(),
             path: None,
+            extra: vec![],
         };
         let seg = build_augmentation_segment(&[aug], "zh");
         assert!(!seg.contains("目录:"), "无 path 不应渲染目录行: {}", seg);

src-tauri/src/commands/ai/commands/conversation.rs

@@ -637,7 +637,7 @@ pub async fn ai_conversation_export(
 #[cfg(test)]
 mod tests {
     use super::*;
-    use df_ai::provider::{ChatMessage, ContentPart, MessageRole, MessageStatus, ToolCall, ToolCallFunction, ToolType};
+    use df_ai::provider::{ChatMessage, ContentPart, MessageRole, MessageStatus, ToolCall, ToolCallFunction};
 
     fn base_msg() -> ChatMessage {
         ChatMessage {
@@ -821,7 +821,7 @@ mod tests {
             serde_json::to_string(&msg.tool_calls).unwrap()
         );
         assert_eq!(back.model.as_deref(), Some("m"));
-        assert_eq!(back.status.as_deref(), Some("compressed"));
+        assert_eq!(back.status.as_ref(), Some(&MessageStatus::Compressed));
         assert_eq!(back.reasoning_content.as_deref(), Some("r"));
         assert_eq!(back.timestamp, Some(123));
     }
@@ -875,7 +875,7 @@ mod tests {
                             },
                         }]),
                         status: if i % 6 == 0 {
-                            Some("compressed".into())
+                            Some(MessageStatus::Compressed)
                         } else {
                             None
                         },
@@ -980,7 +980,7 @@ mod tests {
                 id: Some("m_summary".into()),
                 role: MessageRole::Assistant,
                 content: "压缩摘要".into(),
-                status: Some("compressed".into()),
+                status: Some(MessageStatus::Compressed),
                 ..base_msg()
             },
             ChatMessage {

src-tauri/src/commands/ai/tool_registry.rs

@@ -4081,7 +4081,7 @@ mod tests {
             id: "proj-svc-1".to_string(),
             name: "proj-svc-1".to_string(),
             description: String::new(),
-            status: "planning".to_string(),
+            status: ProjectStatus::Planning,
             idea_id: None,
             path: None,
             stack: None,