refactor: 清理 Electron 遗留代码并优化项目结构

- 删除 Electron 主进程代码 (src/main/)
- 删除构建产物文件夹 (build/, dist/, release/)
- 清理 package.json 中的 Electron 依赖和脚本
- 删除 TypeScript 配置中的 Electron 相关文件
- 优化前端代码结构至 Tauri 标准结构 (src/renderer → src/)
- 删除移动端图标和不必要文件
- 更新文档说明技术栈变更为 Tauri

src/components/ConfirmDialog.css

@@ -0,0 +1,105 @@
+.confirm-overlay {
+  position: fixed;
+  top: 0;
+  left: 0;
+  right: 0;
+  bottom: 0;
+  background: rgba(0, 0, 0, 0.5);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  z-index: 1000;
+  backdrop-filter: blur(2px);
+}
+
+.confirm-dialog {
+  background: white;
+  border-radius: 8px;
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
+  min-width: 300px;
+  max-width: 400px;
+  animation: confirmSlideIn 0.2s ease-out;
+}
+
+@keyframes confirmSlideIn {
+  from {
+    opacity: 0;
+    transform: scale(0.9) translateY(-20px);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1) translateY(0);
+  }
+}
+
+.confirm-header {
+  padding: 1.5rem 1.5rem 1rem;
+  border-bottom: 1px solid #eee;
+}
+
+.confirm-header h3 {
+  margin: 0;
+  font-size: 1.1rem;
+  color: #333;
+  font-weight: 600;
+}
+
+.confirm-content {
+  padding: 1rem 1.5rem;
+}
+
+.confirm-content p {
+  margin: 0;
+  color: #666;
+  line-height: 1.5;
+}
+
+.confirm-actions {
+  display: flex;
+  gap: 0.75rem;
+  padding: 1rem 1.5rem 1.5rem;
+  justify-content: flex-end;
+}
+
+.confirm-btn {
+  padding: 0.5rem 1rem;
+  border: none;
+  border-radius: 4px;
+  cursor: pointer;
+  font-size: 0.9rem;
+  font-weight: 500;
+  transition: background-color 0.2s, transform 0.1s;
+  min-width: 70px;
+}
+
+.confirm-btn:hover {
+  transform: translateY(-1px);
+}
+
+.confirm-btn:active {
+  transform: translateY(0);
+}
+
+.cancel-btn {
+  background: #f8f9fa;
+  color: #6c757d;
+  border: 1px solid #dee2e6;
+}
+
+.cancel-btn:hover {
+  background: #e9ecef;
+}
+
+.confirm-btn-primary {
+  background: #dc3545;
+  color: white;
+}
+
+.confirm-btn-primary:hover {
+  background: #c82333;
+}
+
+.confirm-btn:focus {
+  outline: 2px solid #007bff;
+  outline-offset: 2px;
+}