feat: 系统配置支持动态增删用户类型和会员套餐

新增功能:
- UserTypeConfig 模型：用户类型配置支持动态增删
- MembershipPlanConfig 模型：会员套餐配置支持动态增删
- 用户类型管理页面：添加、编辑、删除、启用/禁用用户类型
- 会员套餐管理页面：添加、编辑、删除、上架/下架、推荐套餐
- 功能权限配置：支持选择功能列表
- 初始化默认配置功能

改进:
- settings.html 页面重构，提供配置入口链接
- 新增API接口支持增删改查操作

admin.py

@@ -9,7 +9,8 @@ from sqlalchemy import func, desc
 import json
 
 from models import (db, User, Translation, TranslationCache, GuestTranslation, 
-                   SystemConfig, OperationLog, DataPackage, UserPackage, DynamicConfig)
+                   SystemConfig, OperationLog, DataPackage, UserPackage, DynamicConfig,
+                   UserTypeConfig, MembershipPlanConfig)
 from config import USER_LIMITS, MEMBERSHIP_PLANS
 
 admin_bp = Blueprint('admin', __name__, url_prefix='/admin')
@@ -329,11 +330,15 @@ def settings():
     # 获取动态配置
     dynamic_configs = DynamicConfig.query.all()
     
+    # 获取LLM动态配置
+    llm_config = get_llm_config()
+    
     return render_template('admin/settings.html',
         configs=config_dict,
         dynamic_configs=dynamic_configs,
         user_limits=USER_LIMITS,
-        membership_plans=MEMBERSHIP_PLANS
+        membership_plans=MEMBERSHIP_PLANS,
+        llm_config=llm_config
     )
 
 
@@ -767,4 +772,449 @@ def get_llm_config():
         'max_tokens': DynamicConfig.get('llm_max_tokens', LLM_CONFIG.get('max_tokens')),
         'chunk_size': DynamicConfig.get('llm_chunk_size', LLM_CONFIG.get('chunk_size')),
         'timeout': DynamicConfig.get('llm_timeout', LLM_CONFIG.get('timeout')),
-    }
+    }
+
+
+# ==================== 用户类型配置管理（动态增删） ====================
+@admin_bp.route('/user-types')
+@admin_required
+def user_types():
+    """用户类型配置列表"""
+    user_types = UserTypeConfig.query.order_by(UserTypeConfig.sort_order).all()
+    
+    # 如果数据库中没有数据，初始化默认配置
+    if not user_types:
+        init_default_user_types()
+        user_types = UserTypeConfig.query.order_by(UserTypeConfig.sort_order).all()
+    
+    return render_template('admin/user_types.html', user_types=user_types)
+
+
+@admin_bp.route('/user-types/add', methods=['GET', 'POST'])
+@admin_required
+def add_user_type():
+    """添加用户类型"""
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        # 检查type_key是否已存在
+        existing = UserTypeConfig.query.filter_by(type_key=data.get('type_key')).first()
+        if existing:
+            return jsonify({'error': '类型标识已存在'}), 400
+        
+        user_type = UserTypeConfig(
+            type_key=data.get('type_key'),
+            display_name=data.get('display_name'),
+            daily_translations=int(data.get('daily_translations', 10)),
+            max_pages=int(data.get('max_pages', 50)),
+            max_file_size=int(data.get('max_file_size_mb', 30)) * 1024 * 1024,
+            features=data.get('features', '[]'),
+            sort_order=int(data.get('sort_order', 0)),
+            is_active=data.get('is_active', True),
+            is_system=False,
+        )
+        
+        db.session.add(user_type)
+        db.session.commit()
+        
+        # 记录日志
+        log = OperationLog(
+            user_id=session.get('user_id'),
+            username='admin',
+            action='add_user_type',
+            target=user_type.type_key,
+            detail=json.dumps(user_type.to_dict(), ensure_ascii=False)
+        )
+        db.session.add(log)
+        db.session.commit()
+        
+        if request.is_json:
+            return jsonify({'success': True, 'user_type': user_type.to_dict()})
+        flash('用户类型已添加', 'success')
+        return redirect(url_for('admin.user_types'))
+    
+    # 所有可用功能
+    all_features = [
+        {'key': 'basic_translate', 'name': '基础翻译'},
+        {'key': 'compare_view', 'name': '对照查看'},
+        {'key': 'retranslate', 'name': '重新翻译'},
+        {'key': 'history', 'name': '历史记录'},
+        {'key': 'priority_queue', 'name': '优先队列'},
+        {'key': 'export_pdf', 'name': '导出PDF'},
+        {'key': 'batch_translate', 'name': '批量翻译'},
+        {'key': 'custom_terms', 'name': '自定义术语'},
+    ]
+    
+    return render_template('admin/user_type_form.html', user_type=None, all_features=all_features)
+
+
+@admin_bp.route('/user-types/<int:type_id>/edit', methods=['GET', 'POST'])
+@admin_required
+def edit_user_type(type_id):
+    """编辑用户类型"""
+    user_type = UserTypeConfig.query.get_or_404(type_id)
+    
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        user_type.display_name = data.get('display_name', user_type.display_name)
+        user_type.daily_translations = int(data.get('daily_translations', user_type.daily_translations))
+        user_type.max_pages = int(data.get('max_pages', user_type.max_pages))
+        user_type.max_file_size = int(data.get('max_file_size_mb', user_type.max_file_size // 1024 // 1024)) * 1024 * 1024
+        user_type.features = data.get('features', user_type.features)
+        user_type.sort_order = int(data.get('sort_order', user_type.sort_order))
+        user_type.is_active = data.get('is_active', True) if isinstance(data.get('is_active'), bool) else data.get('is_active') == 'true'
+        
+        db.session.commit()
+        
+        # 记录日志
+        log = OperationLog(
+            user_id=session.get('user_id'),
+            username='admin',
+            action='edit_user_type',
+            target=user_type.type_key,
+            detail=json.dumps(user_type.to_dict(), ensure_ascii=False)
+        )
+        db.session.add(log)
+        db.session.commit()
+        
+        if request.is_json:
+            return jsonify({'success': True, 'user_type': user_type.to_dict()})
+        flash('用户类型已更新', 'success')
+        return redirect(url_for('admin.user_types'))
+    
+    # 所有可用功能
+    all_features = [
+        {'key': 'basic_translate', 'name': '基础翻译'},
+        {'key': 'compare_view', 'name': '对照查看'},
+        {'key': 'retranslate', 'name': '重新翻译'},
+        {'key': 'history', 'name': '历史记录'},
+        {'key': 'priority_queue', 'name': '优先队列'},
+        {'key': 'export_pdf', 'name': '导出PDF'},
+        {'key': 'batch_translate', 'name': '批量翻译'},
+        {'key': 'custom_terms', 'name': '自定义术语'},
+    ]
+    
+    return render_template('admin/user_type_form.html', user_type=user_type, all_features=all_features)
+
+
+@admin_bp.route('/user-types/<int:type_id>/delete', methods=['POST'])
+@admin_required
+def delete_user_type(type_id):
+    """删除用户类型"""
+    user_type = UserTypeConfig.query.get_or_404(type_id)
+    
+    # 系统内置类型不可删除
+    if user_type.is_system:
+        return jsonify({'error': '系统内置类型不可删除'}), 400
+    
+    # 检查是否有用户使用此类型
+    users_count = User.query.filter_by(user_type=user_type.type_key).count()
+    if users_count > 0:
+        return jsonify({'error': f'有 {users_count} 个用户使用此类型，请先修改用户类型'}), 400
+    
+    type_key = user_type.type_key
+    db.session.delete(user_type)
+    db.session.commit()
+    
+    # 记录日志
+    log = OperationLog(
+        user_id=session.get('user_id'),
+        username='admin',
+        action='delete_user_type',
+        target=type_key
+    )
+    db.session.add(log)
+    db.session.commit()
+    
+    return jsonify({'success': True})
+
+
+@admin_bp.route('/user-types/<int:type_id>/toggle', methods=['POST'])
+@admin_required
+def toggle_user_type(type_id):
+    """切换用户类型状态"""
+    user_type = UserTypeConfig.query.get_or_404(type_id)
+    user_type.is_active = not user_type.is_active
+    db.session.commit()
+    
+    return jsonify({'success': True, 'is_active': user_type.is_active})
+
+
+@admin_bp.route('/user-types/init', methods=['POST'])
+@admin_required
+def init_user_types():
+    """初始化默认用户类型"""
+    init_default_user_types()
+    return jsonify({'success': True})
+
+
+def init_default_user_types():
+    """初始化默认用户类型配置"""
+    from config import USER_LIMITS
+    
+    defaults = [
+        ('guest', '访客', USER_LIMITS.get('guest', {}), 0, True),
+        ('free', '免费用户', USER_LIMITS.get('free', {}), 1, True),
+        ('vip_basic', '基础会员', USER_LIMITS.get('vip_basic', {}), 2, True),
+        ('vip_pro', '专业会员', USER_LIMITS.get('vip_pro', {}), 3, True),
+        ('vip_enterprise', '企业会员', USER_LIMITS.get('vip_enterprise', {}), 4, True),
+    ]
+    
+    for type_key, display_name, limits, sort_order, is_system in defaults:
+        existing = UserTypeConfig.query.filter_by(type_key=type_key).first()
+        if not existing:
+            user_type = UserTypeConfig(
+                type_key=type_key,
+                display_name=display_name,
+                daily_translations=limits.get('daily_translations', 10),
+                max_pages=limits.get('max_pages', 50),
+                max_file_size=limits.get('max_file_size', 30*1024*1024),
+                features=json.dumps(limits.get('features', []), ensure_ascii=False),
+                sort_order=sort_order,
+                is_active=True,
+                is_system=is_system,
+            )
+            db.session.add(user_type)
+    
+    db.session.commit()
+
+
+# ==================== 会员套餐配置管理（动态增删） ====================
+@admin_bp.route('/membership-plans')
+@admin_required
+def membership_plans():
+    """会员套餐配置列表"""
+    plans = MembershipPlanConfig.query.order_by(MembershipPlanConfig.sort_order).all()
+    
+    # 如果数据库中没有数据，初始化默认配置
+    if not plans:
+        init_default_membership_plans()
+        plans = MembershipPlanConfig.query.order_by(MembershipPlanConfig.sort_order).all()
+    
+    # 获取所有用户类型供选择
+    user_types = UserTypeConfig.query.filter_by(is_active=True).all()
+    
+    return render_template('admin/membership_plans.html', plans=plans, user_types=user_types)
+
+
+@admin_bp.route('/membership-plans/add', methods=['GET', 'POST'])
+@admin_required
+def add_membership_plan():
+    """添加会员套餐"""
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        # 检查plan_key是否已存在
+        existing = MembershipPlanConfig.query.filter_by(plan_key=data.get('plan_key')).first()
+        if existing:
+            return jsonify({'error': '套餐标识已存在'}), 400
+        
+        plan = MembershipPlanConfig(
+            plan_key=data.get('plan_key'),
+            display_name=data.get('display_name'),
+            price=float(data.get('price', 0)),
+            original_price=float(data.get('original_price')) if data.get('original_price') else None,
+            period=data.get('period', 'month'),
+            period_days=int(data.get('period_days', 30)),
+            description=data.get('description'),
+            user_type_key=data.get('user_type_key'),
+            sort_order=int(data.get('sort_order', 0)),
+            is_active=data.get('is_active', True),
+            is_recommended=data.get('is_recommended', False),
+            is_system=False,
+        )
+        
+        db.session.add(plan)
+        db.session.commit()
+        
+        # 记录日志
+        log = OperationLog(
+            user_id=session.get('user_id'),
+            username='admin',
+            action='add_membership_plan',
+            target=plan.plan_key,
+            detail=json.dumps(plan.to_dict(), ensure_ascii=False)
+        )
+        db.session.add(log)
+        db.session.commit()
+        
+        if request.is_json:
+            return jsonify({'success': True, 'plan': plan.to_dict()})
+        flash('会员套餐已添加', 'success')
+        return redirect(url_for('admin.membership_plans'))
+    
+    # 获取所有用户类型供选择
+    user_types = UserTypeConfig.query.filter_by(is_active=True).all()
+    
+    return render_template('admin/membership_plan_form.html', plan=None, user_types=user_types)
+
+
+@admin_bp.route('/membership-plans/<int:plan_id>/edit', methods=['GET', 'POST'])
+@admin_required
+def edit_membership_plan(plan_id):
+    """编辑会员套餐"""
+    plan = MembershipPlanConfig.query.get_or_404(plan_id)
+    
+    if request.method == 'POST':
+        data = request.json if request.is_json else request.form
+        
+        plan.display_name = data.get('display_name', plan.display_name)
+        plan.price = float(data.get('price', plan.price))
+        plan.original_price = float(data.get('original_price')) if data.get('original_price') else None
+        plan.period = data.get('period', plan.period)
+        plan.period_days = int(data.get('period_days', plan.period_days))
+        plan.description = data.get('description', plan.description)
+        plan.user_type_key = data.get('user_type_key', plan.user_type_key)
+        plan.sort_order = int(data.get('sort_order', plan.sort_order))
+        plan.is_active = data.get('is_active', True) if isinstance(data.get('is_active'), bool) else data.get('is_active') == 'true'
+        plan.is_recommended = data.get('is_recommended', False) if isinstance(data.get('is_recommended'), bool) else data.get('is_recommended') == 'true'
+        
+        db.session.commit()
+        
+        # 记录日志
+        log = OperationLog(
+            user_id=session.get('user_id'),
+            username='admin',
+            action='edit_membership_plan',
+            target=plan.plan_key,
+            detail=json.dumps(plan.to_dict(), ensure_ascii=False)
+        )
+        db.session.add(log)
+        db.session.commit()
+        
+        if request.is_json:
+            return jsonify({'success': True, 'plan': plan.to_dict()})
+        flash('会员套餐已更新', 'success')
+        return redirect(url_for('admin.membership_plans'))
+    
+    # 获取所有用户类型供选择
+    user_types = UserTypeConfig.query.filter_by(is_active=True).all()
+    
+    return render_template('admin/membership_plan_form.html', plan=plan, user_types=user_types)
+
+
+@admin_bp.route('/membership-plans/<int:plan_id>/delete', methods=['POST'])
+@admin_required
+def delete_membership_plan(plan_id):
+    """删除会员套餐"""
+    plan = MembershipPlanConfig.query.get_or_404(plan_id)
+    
+    # 系统内置套餐不可删除
+    if plan.is_system:
+        return jsonify({'error': '系统内置套餐不可删除'}), 400
+    
+    plan_key = plan.plan_key
+    db.session.delete(plan)
+    db.session.commit()
+    
+    # 记录日志
+    log = OperationLog(
+        user_id=session.get('user_id'),
+        username='admin',
+        action='delete_membership_plan',
+        target=plan_key
+    )
+    db.session.add(log)
+    db.session.commit()
+    
+    return jsonify({'success': True})
+
+
+@admin_bp.route('/membership-plans/<int:plan_id>/toggle', methods=['POST'])
+@admin_required
+def toggle_membership_plan(plan_id):
+    """切换会员套餐状态"""
+    plan = MembershipPlanConfig.query.get_or_404(plan_id)
+    plan.is_active = not plan.is_active
+    db.session.commit()
+    
+    return jsonify({'success': True, 'is_active': plan.is_active})
+
+
+@admin_bp.route('/membership-plans/<int:plan_id>/recommend', methods=['POST'])
+@admin_required
+def recommend_membership_plan(plan_id):
+    """设置推荐套餐"""
+    plan = MembershipPlanConfig.query.get_or_404(plan_id)
+    plan.is_recommended = not plan.is_recommended
+    db.session.commit()
+    
+    return jsonify({'success': True, 'is_recommended': plan.is_recommended})
+
+
+@admin_bp.route('/membership-plans/init', methods=['POST'])
+@admin_required
+def init_membership_plans():
+    """初始化默认会员套餐"""
+    init_default_membership_plans()
+    return jsonify({'success': True})
+
+
+def init_default_membership_plans():
+    """初始化默认会员套餐配置"""
+    from config import MEMBERSHIP_PLANS
+    
+    defaults = [
+        ('vip_basic', MEMBERSHIP_PLANS.get('vip_basic', {}), 'vip_basic', 0, True),
+        ('vip_pro', MEMBERSHIP_PLANS.get('vip_pro', {}), 'vip_pro', 1, True),
+        ('vip_enterprise', MEMBERSHIP_PLANS.get('vip_enterprise', {}), 'vip_enterprise', 2, True),
+    ]
+    
+    for plan_key, plan_data, user_type_key, sort_order, is_system in defaults:
+        existing = MembershipPlanConfig.query.filter_by(plan_key=plan_key).first()
+        if not existing:
+            plan = MembershipPlanConfig(
+                plan_key=plan_key,
+                display_name=plan_data.get('name', plan_key),
+                price=plan_data.get('price', 0),
+                original_price=None,
+                period=plan_data.get('period', 'month'),
+                period_days=30 if plan_data.get('period') == 'month' else 365 if plan_data.get('period') == 'year' else 90,
+                description=plan_data.get('description', ''),
+                user_type_key=user_type_key,
+                sort_order=sort_order,
+                is_active=True,
+                is_recommended=False,
+                is_system=is_system,
+            )
+            db.session.add(plan)
+    
+    db.session.commit()
+
+
+# ==================== API: 获取用户限制配置（供其他模块使用） ====================
+def get_user_limits(user_type_key):
+    """获取指定用户类型的限制配置"""
+    config = UserTypeConfig.query.filter_by(type_key=user_type_key, is_active=True).first()
+    if config:
+        return {
+            'daily_translations': config.daily_translations,
+            'max_pages': config.max_pages,
+            'max_file_size': config.max_file_size,
+            'features': config.get_features(),
+        }
+    # 如果数据库中没有，使用默认配置
+    from config import USER_LIMITS
+    return USER_LIMITS.get(user_type_key, USER_LIMITS.get('free', {}))
+
+
+def get_all_user_types():
+    """获取所有用户类型配置"""
+    types = UserTypeConfig.query.filter_by(is_active=True).order_by(UserTypeConfig.sort_order).all()
+    return {t.type_key: get_user_limits(t.type_key) for t in types}
+
+
+def get_membership_plan(plan_key):
+    """获取指定会员套餐配置"""
+    plan = MembershipPlanConfig.query.filter_by(plan_key=plan_key, is_active=True).first()
+    if plan:
+        return plan.to_dict()
+    from config import MEMBERSHIP_PLANS
+    return MEMBERSHIP_PLANS.get(plan_key, {})
+
+
+def get_all_membership_plans():
+    """获取所有会员套餐配置"""
+    plans = MembershipPlanConfig.query.filter_by(is_active=True).order_by(MembershipPlanConfig.sort_order).all()
+    return [p.to_dict() for p in plans]

models.py

@@ -417,4 +417,107 @@ class DynamicConfig(db.Model):
             db.session.add(config)
         
         db.session.commit()
-        return config
+        return config
+
+
+# ==================== 用户类型配置（动态增删） ====================
+class UserTypeConfig(db.Model):
+    """用户类型配置表 - 支持动态增删"""
+    __tablename__ = 'user_type_config'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    type_key = db.Column(db.String(50), unique=True, nullable=False)  # 类型标识: guest, free, vip_basic, etc.
+    display_name = db.Column(db.String(100), nullable=False)          # 显示名称: 访客, 免费用户, 基础会员
+    
+    # 权限配置
+    daily_translations = db.Column(db.Integer, default=10)            # 每日翻译次数 (-1=无限)
+    max_pages = db.Column(db.Integer, default=50)                     # 最大页数 (-1=无限)
+    max_file_size = db.Column(db.Integer, default=30*1024*1024)       # 最大文件大小(bytes)
+    
+    # 功能列表(JSON)
+    features = db.Column(db.Text, default='[]')                        # JSON数组: ["basic_translate", "history"]
+    
+    # 排序和状态
+    sort_order = db.Column(db.Integer, default=0)                     # 排序权重
+    is_active = db.Column(db.Boolean, default=True)                   # 是否启用
+    is_system = db.Column(db.Boolean, default=False)                  # 是否系统内置(不可删除)
+    
+    # 时间
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    def get_features(self):
+        """获取功能列表"""
+        import json
+        try:
+            return json.loads(self.features) if self.features else []
+        except:
+            return []
+    
+    def set_features(self, feature_list):
+        """设置功能列表"""
+        import json
+        self.features = json.dumps(feature_list, ensure_ascii=False)
+    
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'type_key': self.type_key,
+            'display_name': self.display_name,
+            'daily_translations': self.daily_translations,
+            'max_pages': self.max_pages,
+            'max_file_size': self.max_file_size,
+            'features': self.get_features(),
+            'sort_order': self.sort_order,
+            'is_active': self.is_active,
+            'is_system': self.is_system,
+        }
+
+
+# ==================== 会员套餐配置（动态增删） ====================
+class MembershipPlanConfig(db.Model):
+    """会员套餐配置表 - 支持动态增删"""
+    __tablename__ = 'membership_plan_config'
+    
+    id = db.Column(db.Integer, primary_key=True)
+    plan_key = db.Column(db.String(50), unique=True, nullable=False)  # 套餐标识: vip_basic, vip_pro, etc.
+    display_name = db.Column(db.String(100), nullable=False)          # 显示名称: 基础会员
+    
+    # 价格配置
+    price = db.Column(db.Float, default=0)                            # 价格
+    original_price = db.Column(db.Float, nullable=True)               # 原价(用于折扣显示)
+    period = db.Column(db.String(20), default='month')                # 周期: month, quarter, year
+    period_days = db.Column(db.Integer, default=30)                   # 周期天数
+    
+    # 描述
+    description = db.Column(db.String(255), nullable=True)            # 套餐描述
+    
+    # 对应的用户类型
+    user_type_key = db.Column(db.String(50), nullable=True)           # 购买后升级到的用户类型
+    
+    # 排序和状态
+    sort_order = db.Column(db.Integer, default=0)
+    is_active = db.Column(db.Boolean, default=True)
+    is_recommended = db.Column(db.Boolean, default=False)             # 是否推荐
+    is_system = db.Column(db.Boolean, default=False)                  # 是否系统内置(不可删除)
+    
+    # 时间
+    created_at = db.Column(db.DateTime, default=datetime.utcnow)
+    updated_at = db.Column(db.DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+    
+    def to_dict(self):
+        return {
+            'id': self.id,
+            'plan_key': self.plan_key,
+            'display_name': self.display_name,
+            'price': self.price,
+            'original_price': self.original_price,
+            'period': self.period,
+            'period_days': self.period_days,
+            'description': self.description,
+            'user_type_key': self.user_type_key,
+            'sort_order': self.sort_order,
+            'is_active': self.is_active,
+            'is_recommended': self.is_recommended,
+            'is_system': self.is_system,
+        }

templates/admin/membership_plan_form.html

@@ -0,0 +1,240 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>{% if plan %}编辑会员套餐{% else %}添加会员套餐{% endif %} - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.llm_config') }}"><i class="bi bi-cpu"></i> 大模型配置</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4>
+                <i class="bi bi-credit-card"></i> 
+                {% if plan %}编辑会员套餐{% else %}添加会员套餐{% endif %}
+            </h4>
+            <a href="{{ url_for('admin.membership_plans') }}" class="btn btn-outline-secondary">
+                <i class="bi bi-arrow-left"></i> 返回列表
+            </a>
+        </div>
+
+        <div class="card">
+            <div class="card-body">
+                <form id="planForm">
+                    {% if plan %}
+                    <input type="hidden" name="plan_id" value="{{ plan.id }}">
+                    {% endif %}
+                    
+                    <div class="row">
+                        <div class="col-md-6">
+                            <div class="mb-3">
+                                <label class="form-label">套餐标识 <small class="text-muted">(唯一标识符)</small></label>
+                                {% if plan %}
+                                <input type="text" class="form-control" name="plan_key" 
+                                       value="{{ plan.plan_key }}" readonly>
+                                <small class="text-muted">套餐标识创建后不可修改</small>
+                                {% else %}
+                                <input type="text" class="form-control" name="plan_key" 
+                                       placeholder="例如: vip_gold" required>
+                                <small class="text-muted">建议使用英文，如 vip_gold, trial_30days</small>
+                                {% endif %}
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">显示名称</label>
+                                <input type="text" class="form-control" name="display_name" 
+                                       value="{{ plan.display_name if plan else '' }}" required>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">套餐描述</label>
+                                <textarea class="form-control" name="description" rows="2"
+                                          placeholder="简短描述套餐特点">{{ plan.description if plan else '' }}</textarea>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">购买后升级的用户类型</label>
+                                <select class="form-select" name="user_type_key">
+                                    <option value="">-- 不升级用户类型 --</option>
+                                    {% for ut in user_types %}
+                                    <option value="{{ ut.type_key }}" 
+                                            {% if plan and plan.user_type_key == ut.type_key %}selected{% endif %}>
+                                        {{ ut.display_name }} ({{ ut.type_key }})
+                                    </option>
+                                    {% endfor %}
+                                </select>
+                                <small class="text-muted">用户购买此套餐后将升级到指定类型</small>
+                            </div>
+                        </div>
+                        
+                        <div class="col-md-6">
+                            <div class="row">
+                                <div class="col-6">
+                                    <div class="mb-3">
+                                        <label class="form-label">价格 (元)</label>
+                                        <input type="number" class="form-control" name="price" 
+                                               step="0.01" value="{{ plan.price if plan else 0 }}" required>
+                                    </div>
+                                </div>
+                                <div class="col-6">
+                                    <div class="mb-3">
+                                        <label class="form-label">原价 (元) <small class="text-muted">(可选)</small></label>
+                                        <input type="number" class="form-control" name="original_price" 
+                                               step="0.01" value="{{ plan.original_price if plan else '' }}"
+                                               placeholder="用于显示折扣">
+                                    </div>
+                                </div>
+                            </div>
+                            
+                            <div class="row">
+                                <div class="col-6">
+                                    <div class="mb-3">
+                                        <label class="form-label">计费周期</label>
+                                        <select class="form-select" name="period" id="periodSelect">
+                                            <option value="month" {% if plan and plan.period == 'month' %}selected{% endif %}>月</option>
+                                            <option value="quarter" {% if plan and plan.period == 'quarter' %}selected{% endif %}>季</option>
+                                            <option value="year" {% if plan and plan.period == 'year' %}selected{% endif %}>年</option>
+                                            <option value="custom" {% if plan and plan.period not in ['month', 'quarter', 'year'] %}selected{% endif %}>自定义天数</option>
+                                        </select>
+                                    </div>
+                                </div>
+                                <div class="col-6">
+                                    <div class="mb-3" id="periodDaysGroup" 
+                                         style="display: {% if plan and plan.period not in ['month', 'quarter', 'year'] %}block{% else %}none{% endif %}">
+                                        <label class="form-label">周期天数</label>
+                                        <input type="number" class="form-control" name="period_days" 
+                                               value="{{ plan.period_days if plan else 30 }}">
+                                    </div>
+                                </div>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">排序权重</label>
+                                <input type="number" class="form-control" name="sort_order" 
+                                       value="{{ plan.sort_order if plan else 0 }}">
+                                <small class="text-muted">数字越小排在前面</small>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <div class="form-check">
+                                    <input class="form-check-input" type="checkbox" name="is_active" 
+                                           id="is_active" {% if plan and plan.is_active %}checked{% elif not plan %}checked{% endif %}>
+                                    <label class="form-check-label" for="is_active">上架此套餐</label>
+                                </div>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <div class="form-check">
+                                    <input class="form-check-input" type="checkbox" name="is_recommended" 
+                                           id="is_recommended" {% if plan and plan.is_recommended %}checked{% endif %}>
+                                    <label class="form-check-label" for="is_recommended">
+                                        <i class="bi bi-star-fill text-warning"></i> 推荐此套餐
+                                    </label>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                    
+                    <div class="d-flex gap-2">
+                        <button type="submit" class="btn btn-primary">
+                            <i class="bi bi-check-circle"></i> {% if plan %}保存修改{% else %}添加套餐{% endif %}
+                        </button>
+                        <a href="{{ url_for('admin.membership_plans') }}" class="btn btn-outline-secondary">
+                            <i class="bi bi-x-circle"></i> 取消
+                        </a>
+                    </div>
+                </form>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        // 周期选择联动
+        document.getElementById('periodSelect').addEventListener('change', function() {
+            const customGroup = document.getElementById('periodDaysGroup');
+            if (this.value === 'custom') {
+                customGroup.style.display = 'block';
+            } else {
+                customGroup.style.display = 'none';
+                // 自动设置天数
+                const daysInput = document.querySelector('input[name="period_days"]');
+                if (this.value === 'month') daysInput.value = 30;
+                else if (this.value === 'quarter') daysInput.value = 90;
+                else if (this.value === 'year') daysInput.value = 365;
+            }
+        });
+        
+        document.getElementById('planForm').addEventListener('submit', function(e) {
+            e.preventDefault();
+            
+            const formData = new FormData(this);
+            
+            const data = {
+                plan_key: formData.get('plan_key'),
+                display_name: formData.get('display_name'),
+                description: formData.get('description'),
+                user_type_key: formData.get('user_type_key'),
+                price: parseFloat(formData.get('price')),
+                original_price: formData.get('original_price') ? parseFloat(formData.get('original_price')) : null,
+                period: formData.get('period'),
+                period_days: parseInt(formData.get('period_days')),
+                sort_order: parseInt(formData.get('sort_order')),
+                is_active: formData.get('is_active') === 'on',
+                is_recommended: formData.get('is_recommended') === 'on'
+            };
+            
+            {% if plan %}
+            const url = `/admin/membership-plans/{{ plan.id }}/edit`;
+            {% else %}
+            const url = '/admin/membership-plans/add';
+            {% endif %}
+            
+            fetch(url, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify(data)
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    {% if plan %}
+                    alert('会员套餐已更新');
+                    {% else %}
+                    alert('会员套餐已添加');
+                    {% endif %}
+                    window.location.href = '/admin/membership-plans';
+                } else {
+                    alert('操作失败: ' + result.error);
+                }
+            });
+        });
+    </script>
+</body>
+</html>

templates/admin/membership_plans.html

@@ -0,0 +1,221 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>会员套餐配置 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+        .plan-card { border-radius: 12px; transition: all 0.3s; }
+        .plan-card:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(0,0,0,0.15); }
+        .plan-card.basic { border-top: 4px solid #6c757d; }
+        .plan-card.pro { border-top: 4px solid #ffc107; }
+        .plan-card.enterprise { border-top: 4px solid #0d6efd; }
+        .plan-card.custom { border-top: 4px solid #17a2b8; }
+        .price-display { font-size: 2rem; font-weight: bold; }
+        .badge-recommended { background: linear-gradient(135deg, #ffc107, #ff8c00); }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.llm_config') }}"><i class="bi bi-cpu"></i> 大模型配置</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4><i class="bi bi-credit-card"></i> 会员套餐配置</h4>
+            <div>
+                <a href="{{ url_for('admin.add_membership_plan') }}" class="btn btn-success">
+                    <i class="bi bi-plus-circle"></i> 添加套餐
+                </a>
+                <a href="{{ url_for('admin.user_types') }}" class="btn btn-outline-primary">
+                    <i class="bi bi-person-badge"></i> 用户类型配置
+                </a>
+                <a href="{{ url_for('admin.settings') }}" class="btn btn-outline-secondary">
+                    <i class="bi bi-gear"></i> 基础设置
+                </a>
+            </div>
+        </div>
+
+        <div class="row">
+            {% for plan in plans %}
+            <div class="col-md-4 mb-4">
+                <div class="card plan-card {% if plan.plan_key == 'vip_basic' %}basic{% elif plan.plan_key == 'vip_pro' %}pro{% elif plan.plan_key == 'vip_enterprise' %}enterprise{% else %}custom{% endif %}">
+                    <div class="card-header d-flex justify-content-between align-items-center">
+                        <h6 class="mb-0">
+                            {% if plan.is_recommended %}
+                            <span class="badge badge-recommended me-2"><i class="bi bi-star-fill"></i> 推荐</span>
+                            {% endif %}
+                            {% if plan.is_system %}
+                            <span class="badge bg-danger me-2">系统</span>
+                            {% else %}
+                            <span class="badge bg-info me-2">自定义</span>
+                            {% endif %}
+                            {{ plan.display_name }}
+                        </h6>
+                        <span class="badge {% if plan.is_active %}bg-success{% else %}bg-secondary{% endif %}">
+                            {% if plan.is_active %}上架{% else %}下架{% endif %}
+                        </span>
+                    </div>
+                    <div class="card-body text-center">
+                        <div class="price-display text-primary mb-2">
+                            {% if plan.original_price and plan.original_price > plan.price %}
+                            <small class="text-muted d-block" style="font-size: 1rem;">
+                                <del>¥{{ plan.original_price }}</del>
+                            </small>
+                            {% endif %}
+                            ¥{{ plan.price }}
+                        </div>
+                        <div class="text-muted mb-3">
+                            / {% if plan.period == 'month' %}月{% elif plan.period == 'quarter' %}季{% elif plan.period == 'year' %}年{% else %}{{ plan.period_days }}天{% endif %}
+                        </div>
+                        
+                        {% if plan.description %}
+                        <p class="text-muted small mb-3">{{ plan.description }}</p>
+                        {% endif %}
+                        
+                        {% if plan.user_type_key %}
+                        <div class="mb-3">
+                            <small class="text-muted">购买后升级为:</small>
+                            <span class="badge bg-secondary">{{ plan.user_type_key }}</span>
+                        </div>
+                        {% endif %}
+                        
+                        <table class="table table-sm text-start">
+                            <tr>
+                                <td><strong>套餐标识</strong></td>
+                                <td><code>{{ plan.plan_key }}</code></td>
+                            </tr>
+                            <tr>
+                                <td><strong>周期天数</strong></td>
+                                <td>{{ plan.period_days }} 天</td>
+                            </tr>
+                        </table>
+                        
+                        <div class="d-flex gap-2 justify-content-center mt-3">
+                            <a href="{{ url_for('admin.edit_membership_plan', plan_id=plan.id) }}" 
+                               class="btn btn-sm btn-outline-primary">
+                                <i class="bi bi-pencil"></i> 编辑
+                            </a>
+                            {% if not plan.is_system %}
+                            <button onclick="deletePlan({{ plan.id }})" 
+                                    class="btn btn-sm btn-outline-danger">
+                                <i class="bi bi-trash"></i> 删除
+                            </button>
+                            {% endif %}
+                            <button onclick="togglePlan({{ plan.id }})" 
+                                    class="btn btn-sm btn-outline-{% if plan.is_active %}secondary{% else %}success{% endif %}">
+                                <i class="bi bi-power"></i> {% if plan.is_active %}下架{% else %}上架{% endif %}
+                            </button>
+                            <button onclick="recommendPlan({{ plan.id }})" 
+                                    class="btn btn-sm btn-outline-warning">
+                                <i class="bi bi-star{% if plan.is_recommended %}-fill{% endif %}"></i> 
+                                {% if plan.is_recommended %}取消推荐{% else %}推荐{% endif %}
+                            </button>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            {% endfor %}
+        </div>
+
+        {% if not plans %}
+        <div class="card">
+            <div class="card-body text-center">
+                <p class="text-muted">数据库中暂无会员套餐配置</p>
+                <button onclick="initDefaultPlans()" class="btn btn-primary">
+                    <i class="bi bi-download"></i> 初始化默认配置
+                </button>
+            </div>
+        </div>
+        {% endif %}
+    </main>
+
+    <script>
+        function deletePlan(planId) {
+            if (!confirm('确定要删除此会员套餐？此操作不可恢复！')) return;
+            
+            fetch(`/admin/membership-plans/${planId}/delete`, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'}
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    location.reload();
+                } else {
+                    alert('删除失败: ' + result.error);
+                }
+            });
+        }
+        
+        function togglePlan(planId) {
+            fetch(`/admin/membership-plans/${planId}/toggle`, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'}
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    location.reload();
+                } else {
+                    alert('操作失败: ' + result.error);
+                }
+            });
+        }
+        
+        function recommendPlan(planId) {
+            fetch(`/admin/membership-plans/${planId}/recommend`, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'}
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    location.reload();
+                } else {
+                    alert('操作失败: ' + result.error);
+                }
+            });
+        }
+        
+        function initDefaultPlans() {
+            if (!confirm('确定要初始化默认会员套餐配置？')) return;
+            
+            fetch('/admin/membership-plans/init', {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'}
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    location.reload();
+                } else {
+                    alert('初始化失败: ' + result.error);
+                }
+            });
+        }
+    </script>
+</body>
+</html>

templates/admin/settings.html

@@ -11,6 +11,8 @@
         .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
         .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
         .main-content { margin-left: 250px; padding: 20px; }
+        .config-card { border-radius: 10px; transition: all 0.3s; }
+        .config-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.1); }
     </style>
 </head>
 <body>
@@ -23,6 +25,7 @@
             <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
             <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
             <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
             <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
             <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
             <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.llm_config') }}"><i class="bi bi-cpu"></i> 大模型配置</a></li>
@@ -34,78 +37,101 @@
     </nav>
 
     <main class="main-content">
-        <div class="row">
+        <h4 class="mb-4"><i class="bi bi-sliders"></i> 系统配置</h4>
+        
+        <div class="row mb-4">
             <div class="col-md-6">
-                <div class="card">
-                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-sliders"></i> 用户权限配置</h6></div>
+                <div class="card config-card h-100">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-person-badge"></i> 用户类型配置</h6>
+                    </div>
                     <div class="card-body">
-                        <table class="table table-sm">
-                            <thead class="table-light">
-                                <tr>
-                                    <th>用户类型</th>
-                                    <th>每日次数</th>
-                                    <th>最大页数</th>
-                                </tr>
-                            </thead>
-                            <tbody>
-                                {% for type, limits in user_limits.items() %}
-                                <tr>
-                                    <td>{{ type }}</td>
-                                    <td>{{ limits.daily_translations if limits.daily_translations > 0 else '无限' }}</td>
-                                    <td>{{ limits.max_pages if limits.max_pages > 0 else '无限' }}</td>
-                                </tr>
-                                {% endfor %}
-                            </tbody>
-                        </table>
-                        <small class="text-muted">权限配置需修改 config.py 文件</small>
+                        <p class="text-muted">配置不同用户类型的权限限制，包括翻译次数、页数限制、功能权限等。</p>
+                        <p><strong>支持操作：</strong></p>
+                        <ul class="small">
+                            <li>添加新的用户类型</li>
+                            <li>编辑现有类型的权限</li>
+                            <li>删除自定义类型（系统类型不可删除）</li>
+                            <li>启用/禁用用户类型</li>
+                        </ul>
+                        <a href="{{ url_for('admin.user_types') }}" class="btn btn-primary">
+                            <i class="bi bi-gear"></i> 管理用户类型
+                        </a>
                     </div>
                 </div>
             </div>
 
             <div class="col-md-6">
-                <div class="card">
-                    <div class="card-header"><h6 class="mb-0"><i class="bi bi-credit-card"></i> 会员套餐配置</h6></div>
+                <div class="card config-card h-100">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-credit-card"></i> 会员套餐配置</h6>
+                    </div>
                     <div class="card-body">
-                        <table class="table table-sm">
-                            <thead class="table-light">
-                                <tr>
-                                    <th>套餐</th>
-                                    <th>价格</th>
-                                    <th>周期</th>
-                                </tr>
-                            </thead>
-                            <tbody>
-                                {% for key, plan in membership_plans.items() %}
-                                <tr>
-                                    <td>{{ plan.name }}</td>
-                                    <td>¥{{ plan.price }}</td>
-                                    <td>{{ plan.period }}</td>
-                                </tr>
-                                {% endfor %}
-                            </tbody>
-                        </table>
-                        <small class="text-muted">套餐配置需修改 config.py 文件</small>
+                        <p class="text-muted">配置会员套餐的价格、周期、描述等，用户购买后可升级用户类型。</p>
+                        <p><strong>支持操作：</strong></p>
+                        <ul class="small">
+                            <li>添加新的会员套餐</li>
+                            <li>编辑套餐价格和描述</li>
+                            <li>删除自定义套餐（系统套餐不可删除）</li>
+                            <li>上架/下架套餐</li>
+                            <li>设置推荐套餐</li>
+                        </ul>
+                        <a href="{{ url_for('admin.membership_plans') }}" class="btn btn-primary">
+                            <i class="bi bi-credit-card"></i> 管理会员套餐
+                        </a>
                     </div>
                 </div>
             </div>
         </div>
 
-        <div class="card mt-3">
+        <div class="row mb-4">
+            <div class="col-md-6">
+                <div class="card config-card h-100">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-box-seam"></i> 数据包套餐</h6>
+                    </div>
+                    <div class="card-body">
+                        <p class="text-muted">管理数据包套餐，用户可以购买额外的翻译次数。</p>
+                        <a href="{{ url_for('admin.packages') }}" class="btn btn-outline-primary">
+                            <i class="bi bi-box-seam"></i> 管理数据包
+                        </a>
+                    </div>
+                </div>
+            </div>
+
+            <div class="col-md-6">
+                <div class="card config-card h-100">
+                    <div class="card-header">
+                        <h6 class="mb-0"><i class="bi bi-cpu"></i> 大模型配置</h6>
+                    </div>
+                    <div class="card-body">
+                        <p class="text-muted">配置翻译使用的LLM大模型API地址、模型名称等参数。</p>
+                        <p><strong>当前模型：</strong> {{ llm_config.model }}</p>
+                        <a href="{{ url_for('admin.llm_config') }}" class="btn btn-outline-primary">
+                            <i class="bi bi-cpu"></i> 配置大模型
+                        </a>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div class="card">
             <div class="card-header"><h6 class="mb-0"><i class="bi bi-info-circle"></i> 系统信息</h6></div>
             <div class="card-body">
                 <div class="row">
                     <div class="col-md-4">
                         <p><strong>应用名称:</strong> PDF翻译助手</p>
-                        <p><strong>版本:</strong> 1.0.0</p>
+                        <p><strong>版本:</strong> 2.0.0</p>
                         <p><strong>框架:</strong> Flask + SQLAlchemy</p>
                     </div>
                     <div class="col-md-4">
-                        <p><strong>LLM模型:</strong> qwen/qwen3.5-35b-a3b</p>
-                        <p><strong>API地址:</strong> http://192.168.2.5:1234/v1</p>
+                        <p><strong>缓存有效期:</strong> 30天</p>
+                        <p><strong>默认最大文件:</strong> 50MB</p>
+                        <p><strong>数据库:</strong> SQLite</p>
                     </div>
                     <div class="col-md-4">
-                        <p><strong>缓存有效期:</strong> 30天</p>
-                        <p><strong>最大文件:</strong> 50MB</p>
+                        <p><strong>API地址:</strong> {{ llm_config.api_base }}</p>
+                        <p><strong>超时时间:</strong> {{ llm_config.timeout }}秒</p>
                     </div>
                 </div>
             </div>

templates/admin/user_type_form.html

@@ -0,0 +1,198 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>{% if user_type %}编辑用户类型{% else %}添加用户类型{% endif %} - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+        .feature-checkbox { margin: 5px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.llm_config') }}"><i class="bi bi-cpu"></i> 大模型配置</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4>
+                <i class="bi bi-person-badge"></i> 
+                {% if user_type %}编辑用户类型{% else %}添加用户类型{% endif %}
+            </h4>
+            <a href="{{ url_for('admin.user_types') }}" class="btn btn-outline-secondary">
+                <i class="bi bi-arrow-left"></i> 返回列表
+            </a>
+        </div>
+
+        <div class="card">
+            <div class="card-body">
+                <form id="typeForm">
+                    {% if user_type %}
+                    <input type="hidden" name="type_id" value="{{ user_type.id }}">
+                    {% endif %}
+                    
+                    <div class="row">
+                        <div class="col-md-6">
+                            <div class="mb-3">
+                                <label class="form-label">类型标识 <small class="text-muted">(唯一标识符)</small></label>
+                                {% if user_type %}
+                                <input type="text" class="form-control" name="type_key" 
+                                       value="{{ user_type.type_key }}" readonly>
+                                <small class="text-muted">类型标识创建后不可修改</small>
+                                {% else %}
+                                <input type="text" class="form-control" name="type_key" 
+                                       placeholder="例如: vip_special" required>
+                                <small class="text-muted">建议使用英文，如 vip_special, trial_user</small>
+                                {% endif %}
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">显示名称</label>
+                                <input type="text" class="form-control" name="display_name" 
+                                       value="{{ user_type.display_name if user_type else '' }}" required>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">排序权重</label>
+                                <input type="number" class="form-control" name="sort_order" 
+                                       value="{{ user_type.sort_order if user_type else 0 }}">
+                                <small class="text-muted">数字越小排在前面</small>
+                            </div>
+                        </div>
+                        
+                        <div class="col-md-6">
+                            <div class="mb-3">
+                                <label class="form-label">每日翻译次数</label>
+                                <input type="number" class="form-control" name="daily_translations" 
+                                       value="{{ user_type.daily_translations if user_type else 10 }}">
+                                <small class="text-muted">输入 -1 表示无限制</small>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">单文件最大页数</label>
+                                <input type="number" class="form-control" name="max_pages" 
+                                       value="{{ user_type.max_pages if user_type else 50 }}">
+                                <small class="text-muted">输入 -1 表示无限制</small>
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">最大文件大小 (MB)</label>
+                                <input type="number" class="form-control" name="max_file_size_mb" 
+                                       value="{{ (user_type.max_file_size / 1024 / 1024) | round(0) if user_type else 30 }}">
+                            </div>
+                            
+                            <div class="mb-3">
+                                <label class="form-label">状态</label>
+                                <div class="form-check">
+                                    <input class="form-check-input" type="checkbox" name="is_active" 
+                                           id="is_active" {% if user_type and user_type.is_active %}checked{% elif not user_type %}checked{% endif %}>
+                                    <label class="form-check-label" for="is_active">启用此用户类型</label>
+                                </div>
+                            </div>
+                        </div>
+                    </div>
+                    
+                    <div class="mb-3">
+                        <label class="form-label">功能权限</label>
+                        <div class="row">
+                            {% for feature in all_features %}
+                            <div class="col-md-3">
+                                <div class="form-check feature-checkbox">
+                                    <input class="form-check-input" type="checkbox" name="features" 
+                                           value="{{ feature.key }}" id="feature_{{ feature.key }}"
+                                           {% if user_type and feature.key in user_type.get_features() %}checked{% endif %}>
+                                    <label class="form-check-label" for="feature_{{ feature.key }}">
+                                        {{ feature.name }}
+                                    </label>
+                                </div>
+                            </div>
+                            {% endfor %}
+                        </div>
+                    </div>
+                    
+                    <div class="d-flex gap-2">
+                        <button type="submit" class="btn btn-primary">
+                            <i class="bi bi-check-circle"></i> {% if user_type %}保存修改{% else %}添加类型{% endif %}
+                        </button>
+                        <a href="{{ url_for('admin.user_types') }}" class="btn btn-outline-secondary">
+                            <i class="bi bi-x-circle"></i> 取消
+                        </a>
+                    </div>
+                </form>
+            </div>
+        </div>
+    </main>
+
+    <script>
+        document.getElementById('typeForm').addEventListener('submit', function(e) {
+            e.preventDefault();
+            
+            const formData = new FormData(this);
+            
+            // 收集选中的功能
+            const features = [];
+            document.querySelectorAll('input[name="features"]:checked').forEach(el => {
+                features.push(el.value);
+            });
+            
+            const data = {
+                type_key: formData.get('type_key'),
+                display_name: formData.get('display_name'),
+                daily_translations: parseInt(formData.get('daily_translations')),
+                max_pages: parseInt(formData.get('max_pages')),
+                max_file_size_mb: parseInt(formData.get('max_file_size_mb')),
+                sort_order: parseInt(formData.get('sort_order')),
+                is_active: formData.get('is_active') === 'on',
+                features: JSON.stringify(features)
+            };
+            
+            {% if user_type %}
+            const url = `/admin/user-types/{{ user_type.id }}/edit`;
+            {% else %}
+            const url = '/admin/user-types/add';
+            {% endif %}
+            
+            fetch(url, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'},
+                body: JSON.stringify(data)
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    {% if user_type %}
+                    alert('用户类型已更新');
+                    {% else %}
+                    alert('用户类型已添加');
+                    {% endif %}
+                    window.location.href = '/admin/user-types';
+                } else {
+                    alert('操作失败: ' + result.error);
+                }
+            });
+        });
+    </script>
+</body>
+</html>

templates/admin/user_types.html

@@ -0,0 +1,206 @@
+<!DOCTYPE html>
+<html lang="zh-CN">
+<head>
+    <meta charset="UTF-8">
+    <title>用户类型配置 - 后台管理</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.10.0/font/bootstrap-icons.css" rel="stylesheet">
+    <style>
+        body { background-color: #f5f5f5; }
+        .sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: 250px; background: #343a40; padding-top: 60px; }
+        .sidebar .nav-link { color: #adb5bd; padding: 12px 20px; }
+        .sidebar .nav-link:hover, .sidebar .nav-link.active { color: #fff; background: rgba(255,255,255,0.1); }
+        .main-content { margin-left: 250px; padding: 20px; }
+        .type-card { border-radius: 10px; transition: all 0.3s; }
+        .type-card:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,0.15); }
+        .type-card.guest { border-top: 4px solid #6c757d; }
+        .type-card.free { border-top: 4px solid #28a745; }
+        .type-card.vip { border-top: 4px solid #ffc107; }
+        .type-card.enterprise { border-top: 4px solid #0d6efd; }
+        .badge-system { background: #dc3545; }
+        .badge-custom { background: #17a2b8; }
+        .feature-tag { font-size: 0.75rem; margin: 2px; }
+    </style>
+</head>
+<body>
+    <nav class="sidebar">
+        <div class="position-absolute top-0 w-100 p-3 border-bottom border-secondary">
+            <h5 class="text-white mb-0"><i class="bi bi-gear-fill"></i> 后台管理</h5>
+        </div>
+        <ul class="nav flex-column">
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.dashboard') }}"><i class="bi bi-speedometer2"></i> 数据概览</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.users') }}"><i class="bi bi-people"></i> 用户管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.translations') }}"><i class="bi bi-file-text"></i> 翻译记录</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.cache_list') }}"><i class="bi bi-database"></i> 缓存管理</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.packages') }}"><i class="bi bi-box-seam"></i> 数据包套餐</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.stats') }}"><i class="bi bi-bar-chart"></i> 统计报表</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.logs') }}"><i class="bi bi-list-check"></i> 操作日志</a></li>
+            <li class="nav-item"><a class="nav-link" href="{{ url_for('admin.llm_config') }}"><i class="bi bi-cpu"></i> 大模型配置</a></li>
+            <li class="nav-item"><a class="nav-link active" href="{{ url_for('admin.settings') }}"><i class="bi bi-sliders"></i> 系统配置</a></li>
+        </ul>
+        <div class="position-absolute bottom-0 w-100 p-3 border-top border-secondary">
+            <a href="/" class="btn btn-outline-light btn-sm w-100"><i class="bi bi-house"></i> 返回前台</a>
+        </div>
+    </nav>
+
+    <main class="main-content">
+        <div class="d-flex justify-content-between align-items-center mb-4">
+            <h4><i class="bi bi-person-badge"></i> 用户类型配置</h4>
+            <div>
+                <a href="{{ url_for('admin.add_user_type') }}" class="btn btn-success">
+                    <i class="bi bi-plus-circle"></i> 添加用户类型
+                </a>
+                <a href="{{ url_for('admin.membership_plans') }}" class="btn btn-outline-primary">
+                    <i class="bi bi-credit-card"></i> 会员套餐配置
+                </a>
+                <a href="{{ url_for('admin.settings') }}" class="btn btn-outline-secondary">
+                    <i class="bi bi-gear"></i> 基础设置
+                </a>
+            </div>
+        </div>
+
+        <div class="row">
+            {% for user_type in user_types %}
+            <div class="col-md-4 mb-4">
+                <div class="card type-card {% if user_type.type_key == 'guest' %}guest{% elif user_type.type_key == 'free' %}free{% elif user_type.type_key.startswith('vip_') and not user_type.type_key.endswith('_enterprise') %}vip{% elif user_type.type_key.endswith('_enterprise') or user_type.type_key.endswith('enterprise') %}enterprise{% endif %}">
+                    <div class="card-header d-flex justify-content-between align-items-center">
+                        <h6 class="mb-0">
+                            <span class="badge {% if user_type.is_system %}badge-system{% else %}badge-custom{% endif %} me-2">
+                                {% if user_type.is_system %}系统{% else %}自定义{% endif %}
+                            </span>
+                            {{ user_type.display_name }}
+                        </h6>
+                        <span class="badge {% if user_type.is_active %}bg-success{% else %}bg-secondary{% endif %}">
+                            {% if user_type.is_active %}启用{% else %}禁用{% endif %}
+                        </span>
+                    </div>
+                    <div class="card-body">
+                        <table class="table table-sm">
+                            <tr>
+                                <td><strong>类型标识</strong></td>
+                                <td><code>{{ user_type.type_key }}</code></td>
+                            </tr>
+                            <tr>
+                                <td><strong>每日翻译</strong></td>
+                                <td>
+                                    {% if user_type.daily_translations < 0 %}
+                                        <span class="text-success">无限制</span>
+                                    {% else %}
+                                        {{ user_type.daily_translations }} 次
+                                    {% endif %}
+                                </td>
+                            </tr>
+                            <tr>
+                                <td><strong>最大页数</strong></td>
+                                <td>
+                                    {% if user_type.max_pages < 0 %}
+                                        <span class="text-success">无限制</span>
+                                    {% else %}
+                                        {{ user_type.max_pages }} 页
+                                    {% endif %}
+                                </td>
+                            </tr>
+                            <tr>
+                                <td><strong>最大文件</strong></td>
+                                <td>{{ (user_type.max_file_size / 1024 / 1024) | round(0) }} MB</td>
+                            </tr>
+                        </table>
+                        
+                        <div class="mb-2">
+                            <strong>功能权限:</strong>
+                        </div>
+                        <div>
+                            {% for feature in user_type.get_features() %}
+                            <span class="badge bg-info feature-tag">{{ feature }}</span>
+                            {% endfor %}
+                            {% if not user_type.get_features() %}
+                            <span class="text-muted">无特殊功能</span>
+                            {% endif %}
+                        </div>
+                        
+                        <div class="mt-3 d-flex gap-2">
+                            <a href="{{ url_for('admin.edit_user_type', type_id=user_type.id) }}" 
+                               class="btn btn-sm btn-outline-primary">
+                                <i class="bi bi-pencil"></i> 编辑
+                            </a>
+                            {% if not user_type.is_system %}
+                            <button onclick="deleteType({{ user_type.id }})" 
+                                    class="btn btn-sm btn-outline-danger">
+                                <i class="bi bi-trash"></i> 删除
+                            </button>
+                            {% endif %}
+                            <button onclick="toggleType({{ user_type.id }})" 
+                                    class="btn btn-sm btn-outline-{% if user_type.is_active %}secondary{% else %}success{% endif %}">
+                                <i class="bi bi-power"></i> {% if user_type.is_active %}禁用{% else %}启用{% endif %}
+                            </button>
+                        </div>
+                    </div>
+                </div>
+            </div>
+            {% endfor %}
+        </div>
+
+        {% if not user_types %}
+        <div class="card">
+            <div class="card-body text-center">
+                <p class="text-muted">数据库中暂无用户类型配置</p>
+                <button onclick="initDefaultTypes()" class="btn btn-primary">
+                    <i class="bi bi-download"></i> 初始化默认配置
+                </button>
+            </div>
+        </div>
+        {% endif %}
+    </main>
+
+    <script>
+        function deleteType(typeId) {
+            if (!confirm('确定要删除此用户类型？此操作不可恢复！')) return;
+            
+            fetch(`/admin/user-types/${typeId}/delete`, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'}
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    location.reload();
+                } else {
+                    alert('删除失败: ' + result.error);
+                }
+            });
+        }
+        
+        function toggleType(typeId) {
+            fetch(`/admin/user-types/${typeId}/toggle`, {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'}
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    location.reload();
+                } else {
+                    alert('操作失败: ' + result.error);
+                }
+            });
+        }
+        
+        function initDefaultTypes() {
+            if (!confirm('确定要初始化默认用户类型配置？')) return;
+            
+            fetch('/admin/user-types/init', {
+                method: 'POST',
+                headers: {'Content-Type': 'application/json'}
+            })
+            .then(r => r.json())
+            .then(result => {
+                if (result.success) {
+                    location.reload();
+                } else {
+                    alert('初始化失败: ' + result.error);
+                }
+            });
+        }
+    </script>
+</body>
+</html>