perf: remove transition-colors from interactive list items

- Remove from QuickOpenDialog list items for instant keyboard navigation
- Remove from DatabaseSearchDialog results for immediate click response
- Remove from CustomContextMenu items for instant menu interaction

apps/desktop/src/components/quick-open/QuickOpenDialog.vue

@@ -141,7 +141,7 @@ watch(
           </div>
 
           <div v-else class="divide-y">
-            <div v-for="(item, index) in filteredItems" :key="item.id" :class="['px-4 py-2 cursor-pointer transition-colors', index === selectedIndex ? 'bg-accent' : 'hover:bg-muted']" @click="handleSelect(item)" @mouseenter="selectedIndex = index">
+            <div v-for="(item, index) in filteredItems" :key="item.id" :class="['px-4 py-2 cursor-pointer', index === selectedIndex ? 'bg-accent' : 'hover:bg-muted']" @click="handleSelect(item)" @mouseenter="selectedIndex = index">
               <div class="flex items-center justify-between gap-3">
                 <div class="flex-1 min-w-0">
                   <div class="text-sm font-medium truncate">