feat: 创作工作台统一 + AI味检测/白标 + 移动端补全 + 合规发布闭环

- 新增创作工作台 studio.html：合并选题/内容工厂/文章管理为单一 tab 入口（iframe embed 模式）
- 新增 AI味检测模块（ai_slop API + 页面，合规软硬问题分级）
- 新增白标品牌配置（branding API + 页面 + deploy 私有化交付包）
- 发布闭环：publishing 放宽至 editor + records/mark-published 接口
- 移动端响应式补全（admin/calendar/ai-slop 表格卡片兜底）
- 修复菜单幂等播种缺陷（按 path 对齐，避免功能页孤立）
- 新增短视频脚本 shortvideo.py 与 2026 市场调研简报

platform/backend/app/api/branding.py

@@ -0,0 +1,80 @@
+from fastapi import APIRouter, Depends, HTTPException
+from sqlalchemy.orm import Session
+from typing import Optional
+from pydantic import BaseModel
+
+from ..database import get_db
+from ..models import SystemConfig
+from .auth import get_current_admin
+
+router = APIRouter(prefix="/api/branding", tags=["branding"])
+
+BRAND_KEYS = {
+    "brand_name": "宇之然内容创作平台",
+    "brand_logo": "",
+    "brand_primary_color": "#2563eb",
+    "brand_support_email": "",
+}
+
+PUBLIC_RESP_DESC = "白标实例公开信息（供前端运行时应用品牌）"
+
+
+class BrandingResponse(BaseModel):
+    brand_name: str
+    brand_logo: str
+    brand_primary_color: str
+    brand_support_email: str
+    version: str
+
+
+class BrandingUpdate(BaseModel):
+    brand_name: Optional[str] = None
+    brand_logo: Optional[str] = None
+    brand_primary_color: Optional[str] = None
+    brand_support_email: Optional[str] = None
+
+
+def _get(db: Session, key: str) -> str:
+    cfg = db.query(SystemConfig).filter(SystemConfig.key == key).first()
+    if not cfg or cfg.value is None:
+        return BRAND_KEYS.get(key, "")
+    return cfg.value
+
+
+@router.get("", response_model=BrandingResponse)
+def get_branding(db: Session = Depends(get_db)):
+    """公开接口：返回当前实例的白标配置（无需登录），用于前端运行时渲染品牌"""
+    try:
+        from ..main import app
+        version = getattr(app, "version", "0.1.0")
+    except Exception:
+        version = "0.1.0"
+    return BrandingResponse(
+        brand_name=_get(db, "brand_name"),
+        brand_logo=_get(db, "brand_logo"),
+        brand_primary_color=_get(db, "brand_primary_color"),
+        brand_support_email=_get(db, "brand_support_email"),
+        version=version,
+    )
+
+
+@router.put("", response_model=BrandingResponse)
+def update_branding(
+    payload: BrandingUpdate,
+    db: Session = Depends(get_db),
+    admin_user=Depends(get_current_admin),
+):
+    """管理员接口：更新白标配置（品牌名/Logo/主色/支持邮箱）"""
+    data = payload.model_dump(exclude_unset=True)
+    for key, value in data.items():
+        if key not in BRAND_KEYS:
+            continue
+        if value is None:
+            continue
+        cfg = db.query(SystemConfig).filter(SystemConfig.key == key).first()
+        if cfg:
+            cfg.value = str(value)
+        else:
+            db.add(SystemConfig(key=key, value=str(value), description="白标配置"))
+    db.commit()
+    return get_branding(db)