feat: 添加后台管理功能

功能:
- 概览统计
- 模型/GPU/CPU管理（增删改查）
- 侧边栏导航
- 表单验证

app.py

@@ -68,6 +68,11 @@ def knowledge_page():
     """知识库页面"""
     return render_template('knowledge.html')
 
+@app.route('/admin')
+def admin_page():
+    """后台管理页面"""
+    return render_template('admin.html')
+
 # ============ API路由 ============
 
 @app.route('/api/models')
@@ -188,6 +193,86 @@ def api_cpu_detail(cpu_id):
     
     return jsonify(cpu)
 
+@app.route('/api/gpus', methods=['POST'])
+def api_create_gpu():
+    """创建新GPU"""
+    data = request.get_json()
+    gpus = load_data(GPUS_FILE)
+    
+    import uuid
+    data['id'] = uuid.uuid4().hex[:12]
+    data['created_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+    
+    gpus.append(data)
+    save_data(GPUS_FILE, gpus)
+    
+    return jsonify(data)
+
+@app.route('/api/gpus/<gpu_id>', methods=['PUT'])
+def api_update_gpu(gpu_id):
+    """更新GPU"""
+    data = request.get_json()
+    gpus = load_data(GPUS_FILE)
+    
+    gpu = next((g for g in gpus if g['id'] == gpu_id), None)
+    if not gpu:
+        return jsonify({'error': 'GPU not found'}), 404
+    
+    gpu.update(data)
+    gpu['updated_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+    save_data(GPUS_FILE, gpus)
+    
+    return jsonify(gpu)
+
+@app.route('/api/gpus/<gpu_id>', methods=['DELETE'])
+def api_delete_gpu(gpu_id):
+    """删除GPU"""
+    gpus = load_data(GPUS_FILE)
+    gpus = [g for g in gpus if g['id'] != gpu_id]
+    save_data(GPUS_FILE, gpus)
+    
+    return jsonify({'success': True})
+
+@app.route('/api/cpus', methods=['POST'])
+def api_create_cpu():
+    """创建新CPU"""
+    data = request.get_json()
+    cpus = load_data(CPUS_FILE)
+    
+    import uuid
+    data['id'] = uuid.uuid4().hex[:12]
+    data['created_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+    
+    cpus.append(data)
+    save_data(CPUS_FILE, cpus)
+    
+    return jsonify(data)
+
+@app.route('/api/cpus/<cpu_id>', methods=['PUT'])
+def api_update_cpu(cpu_id):
+    """更新CPU"""
+    data = request.get_json()
+    cpus = load_data(CPUS_FILE)
+    
+    cpu = next((c for c in cpus if c['id'] == cpu_id), None)
+    if not cpu:
+        return jsonify({'error': 'CPU not found'}), 404
+    
+    cpu.update(data)
+    cpu['updated_at'] = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
+    save_data(CPUS_FILE, cpus)
+    
+    return jsonify(cpu)
+
+@app.route('/api/cpus/<cpu_id>', methods=['DELETE'])
+def api_delete_cpu(cpu_id):
+    """删除CPU"""
+    cpus = load_data(CPUS_FILE)
+    cpus = [c for c in cpus if c['id'] != cpu_id]
+    save_data(CPUS_FILE, cpus)
+    
+    return jsonify({'success': True})
+
 @app.route('/api/search')
 def api_search():
     """全局搜索"""