fix(lint): 修复 PR #14 引入的 lint 回退 (119→0)

PR #14 从旧分支复制文件导致回退了 PR #10 的 lint 修复。
修复内容:
- autoflake 移除未使用导入/变量
- autopep8 修复缩进/空格
- 手动修复 F821(pathlib→Path), F541(f-string), F841(未使用变量)
- 所有修复均通过 flake8 --max-line-length=120 --extend-ignore=E501 检查 (0 errors)

src/api/project_routes.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from pathlib import Path
-from typing import Any, Dict, List, Optional
+from typing import Any, Dict
 
 from fastapi import APIRouter, HTTPException, Query
 
@@ -31,8 +31,10 @@ async def list_projects():
         if db_path.exists():
             try:
                 conn = sqlite3.connect(str(db_path), timeout=5)
-                total = conn.execute("SELECT COUNT(*) FROM tasks WHERE status != 'cancelled'").fetchone()[0]
-                active = conn.execute("SELECT COUNT(*) FROM tasks WHERE COALESCE(archived,0)=0").fetchone()[0]
+                total = conn.execute(
+                    "SELECT COUNT(*) FROM tasks WHERE status != 'cancelled'").fetchone()[0]
+                active = conn.execute(
+                    "SELECT COUNT(*) FROM tasks WHERE COALESCE(archived,0)=0").fetchone()[0]
                 archived = total - active
                 conn.close()
                 info['task_count'] = active
@@ -45,8 +47,10 @@ async def list_projects():
     if general_db.exists() and "_general" not in projects:
         try:
             conn = sqlite3.connect(str(general_db), timeout=5)
-            total = conn.execute("SELECT COUNT(*) FROM tasks WHERE status != 'cancelled'").fetchone()[0]
-            active = conn.execute("SELECT COUNT(*) FROM tasks WHERE COALESCE(archived,0)=0").fetchone()[0]
+            total = conn.execute(
+                "SELECT COUNT(*) FROM tasks WHERE status != 'cancelled'").fetchone()[0]
+            active = conn.execute(
+                "SELECT COUNT(*) FROM tasks WHERE COALESCE(archived,0)=0").fetchone()[0]
             conn.close()
             projects["_general"] = {
                 "id": "_general", "name": "一般任务", "description": "无项目归属的通用任务",
@@ -60,8 +64,10 @@ async def list_projects():
         if general_db_check.exists():
             try:
                 conn = sqlite3.connect(str(general_db_check), timeout=5)
-                total = conn.execute("SELECT COUNT(*) FROM tasks WHERE status != 'cancelled'").fetchone()[0]
-                active = conn.execute("SELECT COUNT(*) FROM tasks WHERE COALESCE(archived,0)=0").fetchone()[0]
+                total = conn.execute(
+                    "SELECT COUNT(*) FROM tasks WHERE status != 'cancelled'").fetchone()[0]
+                active = conn.execute(
+                    "SELECT COUNT(*) FROM tasks WHERE COALESCE(archived,0)=0").fetchone()[0]
                 conn.close()
                 projects["_general"]["task_count"] = active
                 projects["_general"]["task_count_total"] = total
@@ -76,7 +82,7 @@ async def list_projects():
 async def create_project(body: Dict[str, Any]):
     reg = _registry()
     try:
-        info = reg.create_project(
+        reg.create_project(
             body["id"], body["name"],
             agents=body.get("agents", []),
             description=body.get("description", ""),
@@ -173,7 +179,10 @@ async def move_task(project_id: str, task_id: str, body: Dict[str, Any]):
             depends_on=child.depends_on, must_haves=child.must_haves,
         )
         tgt_bb.create_task(moved_child)
-        src_bb.update_task_status(child.id, "cancelled", detail=f"Moved to {target_project}")
+        src_bb.update_task_status(
+            child.id,
+            "cancelled",
+            detail=f"Moved to {target_project}")
         moved_ids.append(child.id)
 
     # 移动主任务
@@ -186,7 +195,10 @@ async def move_task(project_id: str, task_id: str, body: Dict[str, Any]):
         depends_on=task.depends_on, must_haves=task.must_haves,
     )
     tgt_bb.create_task(moved_task)
-    src_bb.update_task_status(task_id, "cancelled", detail=f"Moved to {target_project}")
+    src_bb.update_task_status(
+        task_id,
+        "cancelled",
+        detail=f"Moved to {target_project}")
     moved_ids.insert(0, task_id)
 
     return {"ok": True, "moved_to": target_project, "moved_ids": moved_ids}