refactor(plugins): 将导航/友链/关于/统计 4 模块迁出 framework 至 plugins

- 在 applications/config.py 中通过 PLUGIN_ENABLE_FOLDERS 启用 4 个业务插件
- 删除 framework 内 applications/view/system/nav.py 与 templates/system/nav/* 模板
- applications/extensions/init_plugs 移除重复的 broadcast_execute('event_init'/'event_finish')
  （由 init_bps / init_script 触发，避免 Blueprint 注册冲突）
- applications/view/system/index.py：未登录访问 / 直接渲染前台公开聚合页
- templates/system/index.html：移动端首屏即折叠侧边栏
- 新增 5 个 model（Nav 字段 status→enable 兼容、NavCategory、About、Friend、VisitLog/PageStat、NavClick）
- 新增 2 个 schema（NavCategorySchema、FriendOutSchema/ManageSchema）
- admin_about/admin_friend/admin_nav_category 在 init.json 中以「网站管理」分组挂载
- .gitignore 补充一次性备份、调试截图、探针截图不入库

applications/view/system/__init__.py

@@ -6,7 +6,7 @@ from applications.view.system.index import bp as index_bp
 from applications.view.system.log import bp as log_bp
 from applications.view.system.mail import bp as mail_bp
 from applications.view.system.monitor import bp as monitor_bp
-from applications.view.system.nav import bp as nav_bp
+# 4 个业务模块（nav / friend / about / stat）已迁出到 plugins/* ，下文的 register 也不再挂载
 from applications.view.system.passport import bp as passport_bp
 from applications.view.system.power import bp as power_bp
 from applications.view.system.rights import bp as right_bp
@@ -31,6 +31,5 @@ def register_system_bps(app: Flask):
     system_bp.register_blueprint(passport_bp)
     system_bp.register_blueprint(right_bp)
     system_bp.register_blueprint(dept_bp)
-    system_bp.register_blueprint(nav_bp)
     app.register_blueprint(index_bp)
     app.register_blueprint(system_bp)

applications/view/system/index.py

@@ -1,14 +1,18 @@
 from flask import Blueprint, render_template
-from flask_login import login_required, current_user
+from flask_login import login_required, current_user, login_fresh
+
+from applications.view.public.nav import render_public_index
 
 bp = Blueprint('index', __name__, url_prefix='/')
 
 
-# 首页
+# 首页：未登录 → 前台公开导航聚合页；已登录 → 跳到工作台
 @bp.get('/')
-@login_required
 def index():
-    user = current_user
-    return render_template('system/index.html', user=user)
+    # 已登录用户访问根路径时，直接进后台工作台；
+    # 匿名访问则直接渲染前台导航页（不重定向，地址栏保持 /）
+    if current_user.is_authenticated:
+        return render_template('system/index.html', user=current_user)
+    return render_public_index()
 
 

applications/view/system/nav.py

@@ -1,142 +0,0 @@
-"""
-后台导航管理视图（需要登录 + 权限码 system:nav:*）
-
-提供 Nav 模型的 CRUD 接口，供后台管理员维护前台公开导航。
-"""
-from flask import Blueprint, render_template, request
-from flask_login import current_user
-
-from applications.common.utils.http import table_api, fail_api, success_api
-from applications.common.utils.rights import authorize
-from applications.common.utils.validate import str_escape
-from applications.extensions import db
-from applications.extensions.init_limit import limiter
-from applications.models import Nav
-from applications.schemas import NavManageSchema
-
-bp = Blueprint('nav', __name__, url_prefix='/nav')
-
-
-@bp.get('/')
-@authorize("system:nav:main")
-def main():
-    """导航管理主页"""
-    return render_template('system/nav/main.html')
-
-
-@bp.get('/data')
-@limiter.limit("60 per minute")
-@authorize("system:nav:main")
-def data():
-    """表格数据接口"""
-    keyword = str_escape(request.args.get('keyword', type=str))
-    category = str_escape(request.args.get('category', type=str))
-
-    query = Nav.query
-    if keyword:
-        query = query.filter(
-            db.or_(
-                Nav.title.contains(keyword),
-                Nav.url.contains(keyword),
-                Nav.description.contains(keyword),
-            )
-        )
-    if category:
-        query = query.filter(Nav.category == category)
-
-    items = query.order_by(Nav.category.asc(), Nav.sort.asc(), Nav.id.asc()).all()
-    data = NavManageSchema(many=True).dump(items)
-    return table_api(msg="请求成功", data=data, count=len(data))
-
-
-@bp.get('/add')
-@authorize("system:nav:add", log=True)
-def add():
-    return render_template('system/nav/add.html')
-
-
-@bp.post('/save')
-@authorize("system:nav:add", log=True)
-def save():
-    req = request.get_json(force=True)
-    try:
-        nav = Nav(
-            category=str_escape(req.get('category')),
-            title=str_escape(req.get('title')),
-            url=str_escape(req.get('url')),
-            description=str_escape(req.get('description')),
-            icon=str_escape(req.get('icon')) or 'layui-icon-link',
-            sort=int(req.get('sort') or 0),
-            status=int(req.get('status') or 1),
-            is_external=int(req.get('isExternal') or 1),
-            create_by=current_user.username if current_user.is_authenticated else 'admin',
-        )
-        db.session.add(nav)
-        db.session.commit()
-    except Exception as e:
-        db.session.rollback()
-        return fail_api(msg=f"新增失败：{e}")
-    return success_api(msg="新增成功")
-
-
-@bp.get('/edit')
-@authorize("system:nav:edit", log=True)
-def edit():
-    nav_id = request.args.get("navId", type=int)
-    nav = Nav.query.get(nav_id)
-    if not nav:
-        return fail_api(msg="导航不存在")
-    return render_template('system/nav/edit.html', nav=nav)
-
-
-@bp.put('/update')
-@authorize("system:nav:edit", log=True)
-def update():
-    req = request.get_json(force=True)
-    nav_id = req.get('id')
-    nav = Nav.query.get(nav_id)
-    if not nav:
-        return fail_api(msg="导航不存在")
-    try:
-        nav.category = str_escape(req.get('category')) or nav.category
-        nav.title = str_escape(req.get('title')) or nav.title
-        nav.url = str_escape(req.get('url')) or nav.url
-        nav.description = str_escape(req.get('description'))
-        nav.icon = str_escape(req.get('icon')) or 'layui-icon-link'
-        nav.sort = int(req.get('sort') or 0)
-        nav.status = int(req.get('status') or 1)
-        nav.is_external = int(req.get('isExternal') or 1)
-        db.session.commit()
-    except Exception as e:
-        db.session.rollback()
-        return fail_api(msg=f"更新失败：{e}")
-    return success_api(msg="更新成功")
-
-
-@bp.delete('/remove/<int:_id>')
-@authorize("system:nav:remove", log=True)
-def remove(_id):
-    nav = Nav.query.get(_id)
-    if not nav:
-        return fail_api(msg="导航不存在")
-    db.session.delete(nav)
-    db.session.commit()
-    return success_api(msg="删除成功")
-
-
-@bp.put('/enable')
-@authorize("system:nav:edit", log=True)
-def enable():
-    nav_id = request.get_json(force=True).get('navId')
-    Nav.query.filter_by(id=nav_id).update({"status": 1})
-    db.session.commit()
-    return success_api(msg="已启用")
-
-
-@bp.put('/disable')
-@authorize("system:nav:edit", log=True)
-def disable():
-    nav_id = request.get_json(force=True).get('navId')
-    Nav.query.filter_by(id=nav_id).update({"status": 0})
-    db.session.commit()
-    return success_api(msg="已禁用")