refactor(web_api): fix import paths, modularize routers and decompose agent pipeline

modules/web_api/routers/tasks.py

@@ -0,0 +1,71 @@
+"""
+===============================================================================
+FILE: modules/web_api/routers/tasks.py
+ROLE: REST API управления задачами (GET / POST / PATCH / DELETE).
+===============================================================================
+"""
+
+# ANCHOR[TASKS_ROUTER_IMPORTS]
+from typing import Dict, Any, Optional
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
+
+from .auth import get_current_user
+from llm.db_tools import (
+    db_get_tasks,
+    db_add_task,
+    db_update_task_status,
+    db_delete_task
+)
+
+router = APIRouter(prefix="/api/v1/tasks", tags=["tasks"])
+
+# ANCHOR[TASKS_SCHEMAS]
+class CreateTaskRequest(BaseModel):
+    title: str
+    priority: Optional[str] = "MEDIUM"
+    module: Optional[str] = "general"
+    due_date: Optional[str] = None
+
+class UpdateTaskRequest(BaseModel):
+    status: Optional[str] = "COMPLETED"
+    due_date: Optional[str] = None
+
+# ANCHOR[TASKS_ENDPOINTS]
+@router.get("")
+def get_tasks(user: Dict[str, Any] = Depends(get_current_user)):
+    """Получить список всех задач текущего авторизованного пользователя."""
+    return db_get_tasks(user_id=user["id"])
+
+@router.post("")
+def create_task_endpoint(req: CreateTaskRequest, user: Dict[str, Any] = Depends(get_current_user)):
+    """Прямое создание задачи."""
+    res = db_add_task(
+        user_id=user["id"],
+        module=req.module or "general",
+        title=req.title.strip(),
+        priority=req.priority or "MEDIUM",
+        due_date=req.due_date
+    )
+    return res
+
+@router.patch("/{task_id}")
+def update_task_endpoint(task_id: str, req: UpdateTaskRequest, user: Dict[str, Any] = Depends(get_current_user)):
+    """Прямое обновление статуса и срока задачи."""
+    res = db_update_task_status(
+        user_id=user["id"],
+        task_id=task_id,
+        status=req.status or "COMPLETED",
+        due_date=req.due_date
+    )
+    if "error" in res:
+        raise HTTPException(status_code=404, detail=res["error"])
+    return res
+
+@router.delete("/{task_id}")
+def delete_task_endpoint(task_id: str, user: Dict[str, Any] = Depends(get_current_user)):
+    """Прямое удаление задачи."""
+    res = db_delete_task(user_id=user["id"], task_id=task_id)
+    if "error" in res:
+        raise HTTPException(status_code=404, detail=res["error"])
+    return res