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/RowVirtualizerDynamic.vue

@@ -33,29 +33,15 @@ const rowVirtualizer = useVirtualizer(computed(() => ({
 const virtualRows = computed(() => rowVirtualizer.value.getVirtualItems());
 const totalSize = computed(() => rowVirtualizer.value.getTotalSize());
 
-let resizeRafId: number | undefined = undefined;
-const resizeObserver = new ResizeObserver(() => {
-    if (resizeRafId) return;
-
-    resizeRafId = requestAnimationFrame(() => {
-        resizeRafId = undefined;
-        rowVirtualizer.value.measure();
-        updateScrollMargin();
-    });
-});
-
 onMounted(() => {
-    resizeObserver.observe(containerRef.value!);
+    window.addEventListener('resize', updateScrollMargin);
     updateScrollMargin();
 });
 
 onUnmounted(() => {
-    resizeObserver.disconnect();
+    window.removeEventListener('resize', updateScrollMargin);
 });
 
-
-
-// Keep the measure function simple
 const measureElement = (el: any) => {
     if (el) {
         rowVirtualizer.value.measureElement(el);
@@ -75,7 +61,6 @@ watch(() => props.items, () => {
                 top: 0,
                 left: 0,
                 width: '100%',
-                minHeight: `${virtualRow.size}px`,
                 transform: `translateY(${virtualRow.start - scrollMargin}px)`,
             }">
             <slot :item="props.items[virtualRow.index]" :index="virtualRow.index" />