feat: optimize logo display (#6267)

* feat(VbenAvatar): add fit property to VbenAvatar component

* feat(VbenLogo): add fit property to VbenLogo component

* feat(VbenLogo): add logo fit preference configuration

- Add preferences.logo.fit setting for logo display control
- Include corresponding documentation for the new preference

* feat(preferences): add default value for logo.fit preference

- Set default configuration for logo fit behavior
- Ensures consistent logo display across applications

* test(preferences): update configuration snapshots

---------

Co-authored-by: wyc001122 <wangyongchao@testor.com.cn>

docs/src/en/guide/essentials/settings.md

@@ -238,6 +238,7 @@ const defaultPreferences: Preferences = {
   },
   logo: {
     enable: true,
+    fit: 'contain',
     source: 'https://unpkg.com/@vbenjs/static-source@0.1.7/source/logo-v1.webp',
   },
   navigation: {
@@ -431,6 +432,8 @@ interface HeaderPreferences {
 interface LogoPreferences {
   /** Whether the logo is visible */
   enable: boolean;
+  /** Logo image fitting method */
+  fit: 'contain' | 'cover' | 'fill' | 'none' | 'scale-down';
   /** Logo URL */
   source: string;
 }

docs/src/guide/essentials/settings.md

@@ -237,6 +237,7 @@ const defaultPreferences: Preferences = {
   },
   logo: {
     enable: true,
+    fit: 'contain',
     source: 'https://unpkg.com/@vbenjs/static-source@0.1.7/source/logo-v1.webp',
   },
   navigation: {
@@ -431,6 +432,8 @@ interface HeaderPreferences {
 interface LogoPreferences {
   /** logo是否可见 */
   enable: boolean;
+  /** logo图片适应方式 */
+  fit: 'contain' | 'cover' | 'fill' | 'none' | 'scale-down';
   /** logo地址 */
   source: string;
 }