fix: UI polish and provider fixes

- Add animate-pulse CSS animation for loading states
- Add Ctrl+I/Ctrl+B markdown shortcuts in chat input
- Improve chat input resize with mirror element
- Add reasoning duration display and shimmer effect
- Add confirmation dialog for deleting all models
- Simplify RowVirtualizerDynamic resize handling
- Fix DialogType imports (type -> value)
- Fix ollama cloud model name resolution
- Make vllm auth header optional
- Various icon and styling fixes

app/components/SearchSelector.vue

@@ -106,7 +106,7 @@ const openSettings = () => {
                             </span>
                             <button @click="adjustMaxResults(1)"
                                 class="h-7 w-7 flex items-center justify-center rounded-lg @hover:bg-[var(--color-hover)] text-[var(--text-secondary)] @hover:text-[var(--text-primary)] transition-colors duration-150">
-                                <span class="text-sm i-mynaui-plus"></span>
+                                <span class="text-sm i-mynaui-plus-solid"></span>
                             </button>
                         </div>
                     </div>