feat: add visual configuration editor and YAML handling

- Implemented a new hook `useVisualConfig` for managing visual configuration state and YAML parsing.
- Added types for visual configuration in `visualConfig.ts`.
- Enhanced `ConfigPage` to support switching between visual and source editors.
- Introduced floating action buttons for save and reload actions.
- Updated translations for tab labels in English and Chinese.
- Styled the configuration page with new tab and floating action button styles.

src/components/config/ConfigSection.tsx

@@ -0,0 +1,22 @@
+import type { PropsWithChildren, ReactNode } from 'react';
+import { Card } from '@/components/ui/Card';
+
+interface ConfigSectionProps {
+  title: ReactNode;
+  description?: ReactNode;
+  className?: string;
+}
+
+export function ConfigSection({ title, description, className, children }: PropsWithChildren<ConfigSectionProps>) {
+  return (
+    <Card title={title} className={className}>
+      {description && (
+        <p style={{ margin: '-4px 0 16px 0', color: 'var(--text-secondary)', fontSize: 13 }}>
+          {description}
+        </p>
+      )}
+      {children}
+    </Card>
+  );
+}
+