fix: Pass explicit page arg to handleBrowseSearch on Enter key

Prevents KeyboardEvent being passed as page number parameter.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/views/admin/PluginsView.vue

@@ -231,7 +231,7 @@ onMounted(() => {
           type="text"
           placeholder="Search uMod plugins..."
           @input="scheduleBrowseSearch"
-          @keydown.enter="handleBrowseSearch"
+          @keydown.enter="handleBrowseSearch(1)"
           class="w-full pl-10 pr-3 py-2 bg-neutral-800 border border-neutral-700 rounded-lg text-sm text-neutral-100 placeholder-neutral-500 focus:outline-none focus:ring-2 focus:ring-oxide-500/50 focus:border-oxide-500 transition-colors"
         />
       </div>