Fix image fields to open the real media library picker (v2.1.1)

wp_enqueue_media() was never called on the Settings page, so wp.media
was undefined client-side and every image field (Logo, Dark mode logo,
Login logo, Admin favicon) silently fell back to a plain URL prompt
instead of the WordPress media library. Also relabeled the picker
button ("Choose from media library" instead of "{label} url") so it
reads as a picker, not a URL field.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

app/src/pages/settings/components/SettingsField.vue

@@ -152,7 +152,7 @@ const openFontList = () => {
       >
         <img v-if="val" :src="val" alt="" />
         <span v-else class="dashicons dashicons-format-image field__image-ph" />
-        <span class="field__image-label">{{ val ? 'Change' : (field.label + ' url') }}</span>
+        <span class="field__image-label">{{ val ? 'Change' : 'Choose from media library' }}</span>
       </button>
 
       <!-- Multiselect (checkbox list) -->