fix: show title regardless of logo condition

docs/config/theme-configs.md

@@ -37,7 +37,7 @@ export default {
 
 - Type: `string | false`
 
-You can customize this item to replace the default site title (`title` in app config) in nav. When you set `logo`, you can set it to `false` to hide the title.
+You can customize this item to replace the default site title (`title` in app config) in nav. When set to `false`, title in nav will be disabled. Useful when you have `logo` that already contains the site title text.
 
 ```ts
 export default {

src/client/theme-default/components/VPNavBarTitle.vue

@@ -9,11 +9,10 @@ const { hasSidebar } = useSidebar()
 <template>
   <div class="VPNavBarTitle" :class="{ 'has-sidebar': hasSidebar }">
     <a class="title" href="/">
-      <img v-if="theme.logo" class="logo" :src="theme.logo" :alt="site.title">
+      <img v-if="theme.logo" class="logo" :src="theme.logo">
       <template v-if="theme.siteTitle">{{ theme.siteTitle }}</template>
-      <template v-else-if="theme.siteTitle || !theme.logo">{{ site.title }}</template>
+      <template v-else-if="theme.siteTitle === undefined">{{ site.title }}</template>
     </a>
-
   </div>
 </template>
 

types/default-theme.d.ts

@@ -8,7 +8,8 @@ export namespace DefaultTheme {
     logo?: string
 
     /**
-     * Custom site title in navbar
+     * Custom site title in navbar. If the value is undefined,
+     * `config.title` will be used.
      */
     siteTitle?: string | false