feat: AI虚拟用户新闻互动系统 v1.3.0 初始提交

- 虚拟用户管理（昵称/头像/性别/简介/邮箱同步到目标平台）
- AI互动调度（点赞/收藏/评论/转发）
- 日志时间改为北京时间
- 评论达上限后继续执行点赞收藏转发
- 一键登出全部功能
- 浅色主题UI

backend/app/api/endpoints/system.py

@@ -0,0 +1,115 @@
+"""系统设置接口"""
+from fastapi import APIRouter, Depends
+from sqlalchemy import select, update as sql_update
+from app.core.database import get_db
+from app.schemas import ApiResponse
+from app.models import SystemConfig
+
+router = APIRouter()
+
+
+@router.get("/configs")
+async def get_configs(db=Depends(get_db)):
+    result = await db.execute(select(SystemConfig).order_by(SystemConfig.config_key))
+    configs = result.scalars().all()
+    data = {c.config_key: {"value": c.config_value, "type": c.config_type, "desc": c.description}
+            for c in configs}
+    return ApiResponse(data=data)
+
+
+@router.put("/configs")
+async def update_configs(body: dict, db=Depends(get_db)):
+    """批量更新配置"""
+    for key, value in body.items():
+        result = await db.execute(select(SystemConfig).where(SystemConfig.config_key == key))
+        cfg = result.scalar_one_or_none()
+        if cfg:
+            cfg.config_value = str(value)
+        else:
+            db.add(SystemConfig(config_key=key, config_value=str(value)))
+    await db.commit()
+    return ApiResponse(message="配置已保存")
+
+
+@router.post("/scheduler/toggle")
+async def toggle_scheduler(body: dict, db=Depends(get_db)):
+    enabled = body.get("enabled", True)
+    result = await db.execute(select(SystemConfig).where(SystemConfig.config_key == "scheduler_enabled"))
+    cfg = result.scalar_one_or_none()
+    if cfg:
+        cfg.config_value = "true" if enabled else "false"
+    await db.commit()
+    return ApiResponse(message=f"调度器已{'启用' if enabled else '暂停'}")
+
+
+@router.post("/sessions/reset-all")
+async def reset_all_sessions(db=Depends(get_db)):
+    """重置所有用户会话"""
+    from app.models import VirtualUser
+    await db.execute(
+        sql_update(VirtualUser).values(status=0, session_token=None, session_expires_at=None)
+    )
+    await db.commit()
+    return ApiResponse(message="所有会话已重置")
+
+
+@router.post("/login/diagnose")
+async def diagnose_login(body: dict, db=Depends(get_db)):
+    """
+    诊断登录接口原始响应 - 临时调试用
+    传入: {"username": "xxx", "password": "xxx"}
+    """
+    import httpx, hashlib, uuid
+    from datetime import datetime
+    from app.services.news_service import news_service
+
+    cfg = await news_service._client(db)
+    auth = await news_service._auth_url(db)
+
+    username = body.get("username", "")
+    password = body.get("password", "")
+
+    # 构建 formData（与真实登录完全一致）
+    extra = {
+        "username":   username,
+        "password":   password,
+        "loginType":  "password",
+        "grantType":  "password",
+        "isRegister": "false",
+    }
+    if cfg.get("clientCode"):
+        extra["clientCode"] = cfg["clientCode"]
+
+    form = news_service._build_form(extra, cfg)
+
+    try:
+        async with httpx.AsyncClient(timeout=15) as c:
+            resp = await c.post(f"{auth}/open/login/token", data=form)
+
+        # 返回完整诊断信息
+        try:
+            resp_json = resp.json()
+        except Exception:
+            resp_json = None
+
+        return ApiResponse(data={
+            "status_code":   resp.status_code,
+            "response_text": resp.text[:2000],
+            "response_json": resp_json,
+            "request_url":   f"{auth}/open/login/token",
+            "request_form":  {k: v if k not in ("password","accessSecret") else "***" for k, v in form.items()},
+            "content_type":  resp.headers.get("content-type", ""),
+        })
+    except Exception as e:
+        return ApiResponse(code=500, message=str(e), data={"error": str(e)})
+
+
+@router.post("/interaction/run-now")
+async def run_interaction_now(db=Depends(get_db)):
+    """立即触发一次互动任务（不受时间段限制）"""
+    from app.services.scheduler import scheduler_service
+    try:
+        result = await scheduler_service.run_once_now(db)
+        return ApiResponse(data=result, message="互动任务已触发")
+    except Exception as e:
+        return ApiResponse(code=500, message=f"触发失败: {e}")