新增: 批次工作落地(推进链/评估闭环/事件总线/并发/加固) + 技术债清理 + 文档整理

后端:
- 工作流推进链(D-03):advance_task/状态机/闸门走 df-nodes Node trait,conditions 条件引擎扩展
- 想法评估闭环:启发式评分+对抗评估,df-ideas/scoring + df-storage/idea_eval_repo + idea 前端打通
- 全局事件数据总线:df-ai/context+context_helpers+augmentation 跨模块解耦
- AI planner/plan_hint/intent:aichat B 路线并行多轮基础
- patch_file 加固(TD-03/04):读改写整体锁防 lost update,expected_hash 合约闭环
- 压缩超时兜底(F-15 卡死根治)
- F-09 多会话并发:LlmConcurrency per-conv + streamingGuard 前端守护 + verify 脚本
- 知识注入 DRY/skills/audit 扩展

清理:
- aichat 技术债(误报 allow/死导入/过时注释 30 项)
- URGENT.md 删除(11 项加急全解决/迁 todo)
- 文档整理(todo/待决策/待审查/ARCHITECTURE/INDEX + 总线/技术债审查新文档)

crates/df-storage/src/crud/task_repo.rs

@@ -73,7 +73,7 @@ impl_repo!(
 impl TaskRepo {
     /// 列出未删除任务(deleted_at IS NULL)— 对标 ProjectRepo::list_active
     ///
-    /// 显式列出 14 个 TaskRecord 列名(同 ProjectRepo::list_active 写法),
+    /// 显式列出全部 15 个 TaskRecord 列名(同 ProjectRepo::list_active 写法),
     /// 不 SELECT deleted_at:TaskRecord 不带该字段,取了 from_row 会因未知列报错。
     pub async fn list_active(&self) -> Result<Vec<TaskRecord>> {
         let conn = self.conn.clone();
@@ -193,10 +193,35 @@ impl TaskRepo {
         .map_err(storage_err)?
     }
 
+    /// 按项目列出未删除任务(deleted_at IS NULL AND project_id = ?),按创建时间降序。
+    ///
+    /// SQL 下推 project_id 过滤:替代旧 list_active + 内存 retain 全表扫(任务量增长后
+    /// N×M 热点,每页都拉全表进内存再丢)。list_tasks 在有 project_id 时优先走本方法。
+    pub async fn list_active_by_project(&self, project_id: &str) -> Result<Vec<TaskRecord>> {
+        let conn = self.conn.clone();
+        let pid = project_id.to_owned();
+        tokio::task::spawn_blocking(move || {
+            let guard = conn.blocking_lock();
+            let mut stmt = guard
+                .prepare("SELECT id, project_id, title, description, status, priority, branch_name, assignee, workflow_def_id, base_branch, review_rounds, output_json, idea_id, created_at, updated_at FROM tasks WHERE deleted_at IS NULL AND project_id = ?1 ORDER BY created_at DESC")
+                .map_err(storage_err)?;
+            let rows = stmt
+                .query_map(params![pid], |row| task_from_row(row))
+                .map_err(storage_err)?;
+            let mut results = Vec::new();
+            for r in rows {
+                results.push(r.map_err(storage_err)?);
+            }
+            Ok(results)
+        })
+        .await
+        .map_err(storage_err)?
+    }
+
     /// 列出回收站(deleted_at IS NOT NULL),按更新时间(≈删除时间)降序。对标 ProjectRepo::list_deleted。
     ///
-    /// 注:任务表无专用 list_active_by_project 方法,按项目列活跃任务由 commands/task.rs
-    /// 的 list_tasks 用 list_active 后内存过滤 project_id 实现(任务量小,无需 SQL 下推)。
+    /// 注:按项目列活跃任务走 list_active_by_project(SQL 下推 project_id),
+    /// 无 pid 时 fallback list_active。
     pub async fn list_deleted(&self) -> Result<Vec<TaskRecord>> {
         let conn = self.conn.clone();
         tokio::task::spawn_blocking(move || {