添加供应商编辑功能和密码显示切换

- 为供应商列表添加启用和编辑按钮
- 创建EditProviderModal组件支持编辑供应商信息
- 实现updateProvider API接口
- 为API Key输入框添加密码显示/隐藏功能，使用SVG图标
- 更新预设供应商配置为YesCode和PackyCode
- 移除model字段，简化供应商配置

src/renderer/components/ProviderList.css

@@ -105,6 +105,43 @@
   gap: 0.5rem;
 }
 
+.enable-btn {
+  padding: 0.375rem 0.75rem;
+  border: 1px solid #27ae60;
+  background: white;
+  color: #27ae60;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 0.85rem;
+  transition: all 0.2s;
+}
+
+.enable-btn:hover:not(:disabled) {
+  background: #27ae60;
+  color: white;
+}
+
+.enable-btn:disabled {
+  opacity: 0.5;
+  cursor: not-allowed;
+}
+
+.edit-btn {
+  padding: 0.375rem 0.75rem;
+  border: 1px solid #3498db;
+  background: white;
+  color: #3498db;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 0.85rem;
+  transition: all 0.2s;
+}
+
+.edit-btn:hover {
+  background: #3498db;
+  color: white;
+}
+
 .delete-btn {
   padding: 0.375rem 0.75rem;
   border: 1px solid #e74c3c;