新增: 知识图谱Phase2事件流(父⑥) — project_events统一事件流+埋点+timeline

父⑥ Phase 2(对标设计 §2.4):
- V30 迁移:project_events 追加型审计表(id/project_id/event_type/entity_type/entity_id/from_state/to_state/context_json/source/conversation_id/created_at)+ 双索引(project,time / entity)
- ProjectEventRecord + ProjectEventRepo(insert 追加型/get_by_project/get_by_entity/list_recent)
- 事件埋点(best-effort,hook/after,失败 warn 不阻断主操作):
  - task.rs emit_event 辅助 + create_task/advance_task/move_task_queue 埋点
  - idea.rs promote_idea 埋点(idea_promoted,project_id=新项目)
  - project.rs create/delete 埋点
  - 注:idea_created 暂不埋点(idea 无 project_id,待 Inbox 项目落地,NOT NULL+FK 约束)
- get_project_timeline IPC(events 模块)+ lib.rs 注册 + AI 工具(基线 +N)
- source 语义:IPC 标 human,AI 工具路径标 ai

注:workflow 脚本中文变量名 const 致验证 agent 未跑,主控独立 cargo check EXIT 0 + grep 落地齐全核验。

src-tauri/src/commands/project.rs

@@ -18,12 +18,49 @@ use df_project::scan::{
     normalize_path, DiscoveredProject,
 };
 use df_storage::crud::ProjectQuery;
-use df_storage::models::ProjectRecord;
+use df_storage::models::{ProjectEventRecord, ProjectRecord};
 
 use crate::state::AppState;
 
 use super::{err_str, now_millis};
 
+// ============================================================
+// 知识图谱 Phase 2:事件流埋点辅助(best-effort,对标设计 §2.4 hook/after + §10.1)
+// ============================================================
+
+/// 追加一条项目事件到 project_events(best-effort)。失败仅 tracing::warn 不阻断主 IPC。
+///
+/// `source` 标 `"human"`(IPC 层)。AI 工具路径在 tool_registry 内自行标 `"ai"`。
+async fn emit_project_event(
+    state: &AppState,
+    project_id: &str,
+    event_type: &str,
+    entity_type: Option<&str>,
+    entity_id: Option<&str>,
+) {
+    let record = ProjectEventRecord {
+        id: new_id(),
+        project_id: project_id.to_string(),
+        event_type: event_type.to_string(),
+        entity_type: entity_type.map(|s| s.to_string()),
+        entity_id: entity_id.map(|s| s.to_string()),
+        from_state: None,
+        to_state: Some("planning".to_string()),
+        context_json: None,
+        source: Some("human".to_string()),
+        conversation_id: None,
+        created_at: now_millis(),
+    };
+    if let Err(e) = state.project_events.insert(record).await {
+        tracing::warn!(
+            event_type = event_type,
+            project_id = project_id,
+            error = %e,
+            "[事件流] 埋点写入失败(不阻断主操作)"
+        );
+    }
+}
+
 /// 创建项目入参
 #[derive(Debug, Deserialize)]
 pub struct CreateProjectInput {
@@ -132,6 +169,22 @@ async fn create_with_binding(
     if record.path.is_some() {
         state.reload_allowed_dirs().await;
     }
+    // 知识图谱 Phase 2(对标设计 §2.4 hook/after):项目创建事件。best-effort 不阻断。
+    //
+    // 设计 §2.4 event_type 枚举未列 project_created(枚举非穷尽,Repo 不做白名单校验——
+    // 见 project_event_repo.rs 注释「埋点层是唯一生产者,字符串字面量自带约束」)。此处沿用
+    // task_created/idea_created 命名约定新增 project_created,语义自洽。entity_type=project。
+    //
+    // 注:灵感晋升(create_from_idea)在 promote_idea 单独记 idea_promoted 事件(更精确),
+    // 此处一律记 project_created(项目实体自身视角),两事件互补不冲突。
+    emit_project_event(
+        state,
+        &record.id,
+        "project_created",
+        Some("project"),
+        Some(&record.id),
+    )
+    .await;
     Ok(record)
 }