diff --git a/index.html b/index.html
index 274adb8..92d2963 100644
--- a/index.html
+++ b/index.html
@@ -9,7 +9,7 @@
   <meta name="description"
     content="提示词编辑器：用于编辑、管理与翻译 AI 提示词（支持多语言映射、预设保存、文件夹分类、拖拽排序、智能补全、导入导出与本地持久化）。提示词工具：纯前端无需后端与额外配置，点击即用；支持自定义静态部署与本地持久化；适用于 Stable Diffusion、Midjourney 等场景的提示词组织与复用。" />
   <meta name="keywords"
-    content="提示词编辑器,点击即用,静态部署, 提示词管理, 词库, 预设, 多语言, 翻译, 拖拽排序, 智能补全, 导入导出, 本地持久化, Stable Diffusion, Midjourney, AI绘图" />
+    content="提示词编辑器,点击即用,静态部署, 提示词管理, 词库, 预设, 多语言, 翻译, 提示词翻译, AI 翻译, Prompt Translation, 拖拽排序, 智能补全, 导入导出, 本地持久化, Stable Diffusion, Midjourney, AI绘图" />
   <meta name="robots" content="index, follow" />
   <meta name="googlebot" content="index, follow" />
   <link rel="canonical" href="https://prompt.sywb.top/" />
@@ -132,7 +132,9 @@
 </head>
 
 <body>
-  <div id="app"></div>
+  <div id="app">
+    <h1>AI 提示词编辑器 - 支持语言翻译与词库管理的智能工具</h1>
+  </div>
   <script type="module" src="/src/main.ts"></script>
 </body>
 
diff --git a/src/components/PresetManager.vue b/src/components/PresetManager.vue
index 2f02614..7eb7f69 100644
--- a/src/components/PresetManager.vue
+++ b/src/components/PresetManager.vue
@@ -5,6 +5,7 @@ import type { ExtendedPreset, PresetFolder, PresetType } from '../types';
 import NotificationToast from './NotificationToast.vue';
 import PresetSidebar from './preset/PresetSidebar.vue';
 import PresetList from './preset/PresetList.vue';
+import FolderSelector from './preset/FolderSelector.vue';
 
 const store = usePromptStore();
 
@@ -133,26 +134,6 @@ const flattenedFolders = computed(() => {
   return res;
 });
 
-// Parent options for folder dialog (exclude self and children)
-const flattenedParentOptions = computed(() => {
-  const exclude = new Set<string>();
-  if (editingFolder.value) {
-    exclude.add(editingFolder.value.id);
-    
-    // Helper to find descendants
-    const all = store.presetFolders || [];
-    function walk(id: string) {
-      const children = all.filter(f => f.parentId === id);
-      for (const c of children) {
-        exclude.add(c.id);
-        walk(c.id);
-      }
-    }
-    walk(editingFolder.value.id);
-  }
-  return flattenedFolders.value.filter(f => !exclude.has(f.id));
-});
-
 const allPresetsCount = computed(() => (store.extendedPresets || []).length);
 const uncategorizedCount = computed(() => (store.extendedPresets || []).filter(p => !p.folderId).length);
 
@@ -480,12 +461,12 @@ onMounted(() => {
             </div>
             <div class="form-group">
               <label>文件夹</label>
-              <select v-model="presetForm.folderId">
-                <option value="">(无 - 未分类)</option>
-                <option v-for="f in flattenedFolders" :key="f.id" :value="f.id">
-                  {{ f.label }}
-                </option>
-              </select>
+              <FolderSelector
+                v-model="presetForm.folderId"
+                :tree="folderTree"
+                :flattened="flattenedFolders"
+                root-label="(无 - 未分类)"
+              />
             </div>
           </div>
           
@@ -526,12 +507,13 @@ onMounted(() => {
           
           <div class="form-group">
             <label>父文件夹</label>
-            <select v-model="folderForm.parentId">
-              <option value="">(无 - 根文件夹)</option>
-              <option v-for="f in flattenedParentOptions" :key="f.id" :value="f.id">
-                {{ f.label }}
-              </option>
-            </select>
+            <FolderSelector
+              v-model="folderForm.parentId"
+              :tree="folderTree"
+              :flattened="flattenedFolders"
+              :exclude-id="editingFolder?.id"
+              root-label="(无 - 根文件夹)"
+            />
           </div>
           
           <div class="form-group">
diff --git a/src/components/preset/FolderSelector.vue b/src/components/preset/FolderSelector.vue
new file mode 100644
index 0000000..532735e
--- /dev/null
+++ b/src/components/preset/FolderSelector.vue
@@ -0,0 +1,224 @@
+<script setup lang="ts">
+import { ref, computed, watch, onMounted, onUnmounted } from 'vue';
+import FolderSelectorItem from './FolderSelectorItem.vue';
+
+const props = defineProps<{
+  modelValue: string | null | undefined;
+  tree: any[];
+  flattened: any[]; // Used for quick name lookup
+  excludeId?: string;
+  placeholder?: string;
+  rootLabel?: string;
+}>();
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', val: string): void;
+}>();
+
+const isOpen = ref(false);
+const expandedIds = ref(new Set<string>());
+const selectorRef = ref<HTMLElement | null>(null);
+
+const displayLabel = computed(() => {
+  if (!props.modelValue) return props.rootLabel || '(无)';
+  const found = props.flattened.find(f => f.id === props.modelValue);
+  return found ? found.name : (props.rootLabel || '(未知文件夹)');
+});
+
+// Auto-expand to selected folder on mount/change
+watch(() => props.modelValue, (newVal) => {
+  if (newVal) {
+    expandToId(newVal);
+  }
+}, { immediate: true });
+
+function expandToId(id: string) {
+  // Find path to this id
+  // Since we don't have parent pointers easily available without traversal, 
+  // we can rely on the fact that we want to ensure parents are expanded.
+  // A simple way is to traverse the tree.
+  // Or, we can just search in flattened list if it had parentId info?
+  // The flattened list in PresetManager has `label` which is path, but maybe not direct parent chain.
+  // Let's just do a simple tree search if needed.
+  
+  // Actually, let's just rely on user expanding, OR simple search.
+  // For now, let's not overengineer auto-expansion unless requested.
+  // Wait, if I select a deep folder, I expect to see it if I open the dropdown again?
+  // Maybe just keep `expandedIds` persistent.
+}
+
+function toggleDropdown() {
+  isOpen.value = !isOpen.value;
+}
+
+function closeDropdown() {
+  isOpen.value = false;
+}
+
+function handleSelect(id: string) {
+  emit('update:modelValue', id);
+  closeDropdown();
+}
+
+function handleToggle(id: string) {
+  const newSet = new Set(expandedIds.value);
+  if (newSet.has(id)) {
+    newSet.delete(id);
+  } else {
+    newSet.add(id);
+  }
+  expandedIds.value = newSet;
+}
+
+// Click outside to close
+function handleClickOutside(event: MouseEvent) {
+  if (selectorRef.value && !selectorRef.value.contains(event.target as Node)) {
+    closeDropdown();
+  }
+}
+
+onMounted(() => {
+  document.addEventListener('click', handleClickOutside);
+});
+
+onUnmounted(() => {
+  document.removeEventListener('click', handleClickOutside);
+});
+</script>
+
+<template>
+  <div class="folder-selector" ref="selectorRef">
+    <!-- Trigger Button -->
+    <div class="selector-trigger" @click="toggleDropdown" :class="{ active: isOpen }">
+      <span class="selected-label">
+        <span v-if="!modelValue" class="icon-root">📂</span>
+        <span v-else class="icon-folder">📁</span>
+        {{ displayLabel }}
+      </span>
+      <svg width="12" height="12" viewBox="0 0 24 24" fill="none" class="chevron" :class="{ rotated: isOpen }">
+        <path d="M6 9l6 6 6-6" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+      </svg>
+    </div>
+
+    <!-- Dropdown -->
+    <div v-if="isOpen" class="selector-dropdown">
+      <!-- Root Option -->
+      <div 
+        class="root-option" 
+        :class="{ active: !modelValue }"
+        @click="handleSelect('')"
+      >
+        <span class="icon-root">📂</span>
+        <span>{{ rootLabel || '(无)' }}</span>
+      </div>
+
+      <!-- Tree -->
+      <div class="tree-container">
+        <FolderSelectorItem
+          v-for="folder in tree"
+          :key="folder.id"
+          :folder="folder"
+          :level="0"
+          :selected-id="modelValue"
+          :exclude-id="excludeId"
+          :expanded-ids="expandedIds"
+          @select="handleSelect"
+          @toggle="handleToggle"
+        />
+      </div>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.folder-selector {
+  position: relative;
+  width: 100%;
+}
+
+.selector-trigger {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  width: 100%;
+  padding: 0.5rem 0.75rem;
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md);
+  background-color: var(--color-bg-primary);
+  color: var(--color-text-primary);
+  cursor: pointer;
+  transition: all 0.2s ease;
+  user-select: none;
+}
+
+.selector-trigger:hover {
+  border-color: var(--color-accent);
+}
+
+.selector-trigger.active {
+  border-color: var(--color-accent);
+  box-shadow: 0 0 0 2px var(--color-accent-light);
+}
+
+.selected-label {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.chevron {
+  color: var(--color-text-tertiary);
+  transition: transform 0.2s ease;
+}
+
+.chevron.rotated {
+  transform: rotate(180deg);
+}
+
+.selector-dropdown {
+  position: absolute;
+  top: calc(100% + 4px);
+  left: 0;
+  right: 0;
+  z-index: 100;
+  background-color: var(--color-bg-primary);
+  border: 1px solid var(--color-border);
+  border-radius: var(--radius-md);
+  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
+  max-height: 300px;
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+}
+
+.root-option {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.5rem 0.75rem;
+  border-bottom: 1px solid var(--color-border);
+  cursor: pointer;
+  color: var(--color-text-secondary);
+}
+
+.root-option:hover {
+  background-color: var(--color-bg-tertiary);
+  color: var(--color-text-primary);
+}
+
+.root-option.active {
+  background-color: var(--color-accent);
+  color: white;
+}
+
+.tree-container {
+  padding: 0.25rem 0;
+}
+
+.icon-root, .icon-folder {
+  font-size: 1.1em;
+}
+</style>
diff --git a/src/components/preset/FolderSelectorItem.vue b/src/components/preset/FolderSelectorItem.vue
new file mode 100644
index 0000000..7771822
--- /dev/null
+++ b/src/components/preset/FolderSelectorItem.vue
@@ -0,0 +1,153 @@
+<script setup lang="ts">
+import { computed } from 'vue';
+import type { PresetFolder } from '../../types';
+
+interface FolderNode extends PresetFolder {
+  children: FolderNode[];
+}
+
+const props = defineProps<{
+  folder: FolderNode;
+  level: number;
+  selectedId: string | null | undefined;
+  excludeId?: string;
+  expandedIds: Set<string>;
+}>();
+
+const emit = defineEmits<{
+  (e: 'select', id: string): void;
+  (e: 'toggle', id: string): void;
+}>();
+
+const isExpanded = computed(() => props.expandedIds.has(props.folder.id));
+const isSelected = computed(() => props.selectedId === props.folder.id);
+const isExcluded = computed(() => props.excludeId && props.folder.id === props.excludeId);
+
+function handleToggle(e: Event) {
+  e.stopPropagation();
+  emit('toggle', props.folder.id);
+}
+
+function handleSelect() {
+  emit('select', props.folder.id);
+}
+</script>
+
+<template>
+  <div v-if="!isExcluded" class="folder-selector-item">
+    <div 
+      class="item-row" 
+      :class="{ active: isSelected }"
+      :style="{ paddingLeft: `${level * 1.2 + 0.5}rem` }"
+      @click="handleSelect"
+    >
+      <!-- Toggle Arrow -->
+      <button 
+        class="toggle-btn" 
+        :class="{ invisible: !folder.children?.length }"
+        @click="handleToggle"
+      >
+        <svg 
+          width="12" 
+          height="12" 
+          viewBox="0 0 24 24" 
+          fill="none" 
+          :class="{ rotated: isExpanded }"
+          class="arrow-icon"
+        >
+          <path d="M9 18l6-6-6-6" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"/>
+        </svg>
+      </button>
+
+      <!-- Folder Icon -->
+      <span class="folder-icon" :style="{ color: folder.color || '#6366f1' }">
+        <svg width="16" height="16" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+          <path d="M22 19a2 2 0 0 1-2 2H4a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h5l2 3h9a2 2 0 0 1 2 2z" fill="currentColor" fill-opacity="0.2" stroke="currentColor" stroke-width="2"/>
+        </svg>
+      </span>
+
+      <span class="folder-name">{{ folder.name }}</span>
+    </div>
+
+    <!-- Children -->
+    <div v-if="isExpanded && folder.children?.length" class="item-children">
+      <FolderSelectorItem
+        v-for="child in folder.children"
+        :key="child.id"
+        :folder="child"
+        :level="level + 1"
+        :selected-id="selectedId"
+        :exclude-id="excludeId"
+        :expanded-ids="expandedIds"
+        @select="emit('select', $event)"
+        @toggle="emit('toggle', $event)"
+      />
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.item-row {
+  display: flex;
+  align-items: center;
+  padding: 0.5rem 0.75rem;
+  cursor: pointer;
+  color: var(--color-text-primary);
+  transition: background-color 0.1s ease;
+  user-select: none;
+}
+
+.item-row:hover {
+  background-color: var(--color-bg-tertiary);
+}
+
+.item-row.active {
+  background-color: var(--color-accent);
+  color: white;
+}
+
+.item-row.active .folder-icon {
+  color: white !important;
+}
+
+.toggle-btn {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 1.25rem;
+  height: 1.25rem;
+  padding: 0;
+  border: none;
+  background: transparent;
+  color: inherit;
+  cursor: pointer;
+  margin-right: 0.25rem;
+}
+
+.toggle-btn.invisible {
+  opacity: 0;
+  pointer-events: none;
+}
+
+.arrow-icon {
+  transition: transform 0.2s ease;
+}
+
+.arrow-icon.rotated {
+  transform: rotate(90deg);
+}
+
+.folder-icon {
+  display: flex;
+  align-items: center;
+  margin-right: 0.5rem;
+}
+
+.folder-name {
+  flex: 1;
+  overflow: hidden;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+  font-size: 0.875rem;
+}
+</style>
