diff --git a/frontend/src/components/FontTree.vue b/frontend/src/components/FontTree.vue
index 12cf3bb..c90bd30 100644
--- a/frontend/src/components/FontTree.vue
+++ b/frontend/src/components/FontTree.vue
@@ -1,14 +1,28 @@
 <script setup lang="ts">
+import { onBeforeUnmount, onMounted, ref } from 'vue'
 import selectAllIcon from '../assets/icons/selectall.svg'
 import unselectAllIcon from '../assets/icons/unselectall.svg'
-import type { FontTreeNode } from '../types/font'
+import { deleteFontFile, renameFontFile } from '../services/font-file-api'
+import type { FontInfo, FontTreeNode } from '../types/font'
 import { useFontStore } from '../stores/fontStore'
+import { toFontInfoList } from '../utils/font-list'
 
 const props = defineProps<{
   nodes: FontTreeNode[]
 }>()
 
 const fontStore = useFontStore()
+const contextMenu = ref<{
+  visible: boolean
+  x: number
+  y: number
+  fontInfo: FontInfo | null
+}>({
+  visible: false,
+  x: 0,
+  y: 0,
+  fontInfo: null,
+})
 
 function toggleExpand(node: FontTreeNode) {
   const next = !node.expanded
@@ -67,6 +81,105 @@ function handleCategorySelectAll(node: FontTreeNode, event: Event) {
     ids.forEach(id => fontStore.addToPreview(id))
   }
 }
+
+function closeContextMenu() {
+  contextMenu.value.visible = false
+  contextMenu.value.fontInfo = null
+}
+
+function openFontContextMenu(node: FontTreeNode, event: MouseEvent) {
+  event.preventDefault()
+  event.stopPropagation()
+
+  if (node.type !== 'font' || !node.fontInfo) {
+    closeContextMenu()
+    return
+  }
+
+  const menuWidth = 140
+  const menuHeight = 80
+  const safeX = Math.min(event.clientX, window.innerWidth - menuWidth - 8)
+  const safeY = Math.min(event.clientY, window.innerHeight - menuHeight - 8)
+
+  contextMenu.value = {
+    visible: true,
+    x: Math.max(8, safeX),
+    y: Math.max(8, safeY),
+    fontInfo: node.fontInfo,
+  }
+}
+
+async function handleRenameFromContextMenu() {
+  const targetFont = contextMenu.value.fontInfo
+  if (!targetFont) {
+    return
+  }
+
+  closeContextMenu()
+
+  const renamed = window.prompt('请输入新的字体名称', targetFont.name)
+  if (renamed === null) {
+    return
+  }
+
+  const nextName = renamed.trim()
+  if (!nextName || nextName === targetFont.name) {
+    return
+  }
+
+  try {
+    const fontList = await renameFontFile(targetFont.path, nextName)
+    fontStore.replaceFonts(toFontInfoList(fontList))
+  } catch (error) {
+    const message = error instanceof Error ? error.message : '字体重命名失败'
+    window.alert(message)
+  }
+}
+
+async function handleDeleteFromContextMenu() {
+  const targetFont = contextMenu.value.fontInfo
+  if (!targetFont) {
+    return
+  }
+
+  closeContextMenu()
+
+  const confirmed = window.confirm(`确认删除字体“${targetFont.name}”？此操作不可恢复。`)
+  if (!confirmed) {
+    return
+  }
+
+  try {
+    const fontList = await deleteFontFile(targetFont.path)
+    fontStore.replaceFonts(toFontInfoList(fontList))
+  } catch (error) {
+    const message = error instanceof Error ? error.message : '字体删除失败'
+    window.alert(message)
+  }
+}
+
+function handleGlobalPointerDown() {
+  if (!contextMenu.value.visible) {
+    return
+  }
+  closeContextMenu()
+}
+
+function handleGlobalKeyDown(event: KeyboardEvent) {
+  if (event.key === 'Escape') {
+    closeContextMenu()
+  }
+}
+
+onMounted(() => {
+  window.addEventListener('pointerdown', handleGlobalPointerDown)
+  window.addEventListener('keydown', handleGlobalKeyDown)
+})
+
+onBeforeUnmount(() => {
+  window.removeEventListener('pointerdown', handleGlobalPointerDown)
+  window.removeEventListener('keydown', handleGlobalKeyDown)
+})
 </script>
 
 <template>
@@ -129,6 +242,7 @@ function handleCategorySelectAll(node: FontTreeNode, event: Event) {
             v-for="child in node.children"
             :key="child.name"
             class="flex items-center gap-2 border-b border-[#c9cdd4] pb-2 relative"
+            @contextmenu.prevent="openFontContextMenu(child, $event)"
           >
             <!-- 水平连接线 -->
             <div class="tree-horizontal-line"></div>
@@ -169,6 +283,29 @@ function handleCategorySelectAll(node: FontTreeNode, event: Event) {
       </div>
     </div>
   </div>
+
+  <teleport to="body">
+    <div
+      v-if="contextMenu.visible"
+      class="fixed z-[2000] min-w-[140px] rounded-md border border-[#d9d9d9] bg-white shadow-md overflow-hidden"
+      :style="{ left: `${contextMenu.x}px`, top: `${contextMenu.y}px` }"
+      @pointerdown.stop
+      @contextmenu.prevent
+    >
+      <button
+        class="w-full h-9 px-3 text-left text-sm text-[#1f2329] hover:bg-[#f2f3f5] border-0 bg-transparent cursor-pointer"
+        @click="handleRenameFromContextMenu"
+      >
+        重命名
+      </button>
+      <button
+        class="w-full h-9 px-3 text-left text-sm text-[#f53f3f] hover:bg-[#fff2f0] border-0 bg-transparent cursor-pointer"
+        @click="handleDeleteFromContextMenu"
+      >
+        删除
+      </button>
+    </div>
+  </teleport>
 </template>
 
 <style scoped>
diff --git a/frontend/src/composables/useFontLoader.ts b/frontend/src/composables/useFontLoader.ts
index 1667096..4f266ae 100644
--- a/frontend/src/composables/useFontLoader.ts
+++ b/frontend/src/composables/useFontLoader.ts
@@ -1,14 +1,7 @@
 import { onMounted } from 'vue'
 import { useFontStore } from '../stores/fontStore'
-import type { FontInfo } from '../types/font'
-
-interface FontListItem {
-  id: string
-  name: string
-  filename: string
-  category: string
-  path: string
-}
+import type { FontListItem } from '../types/font'
+import { toFontInfoList } from '../utils/font-list'
 
 export function useFontLoader() {
   const fontStore = useFontStore()
@@ -29,23 +22,8 @@ export function useFontLoader() {
       const fontList: FontListItem[] = await response.json()
       console.log('Loaded font list:', fontList.length, 'fonts')
 
-      // 转换为 FontInfo
-      for (const item of fontList) {
-        const fontInfo: FontInfo = {
-          id: item.id,
-          name: item.name,
-          path: item.path,
-          category: item.category,
-          isFavorite: false,
-          loaded: false,
-          progress: 0,
-        }
-
-        fontStore.addFont(fontInfo)
-      }
-
-      // 更新字体树
-      fontStore.updateFontTree()
+      const nextFonts = toFontInfoList(fontList)
+      fontStore.replaceFonts(nextFonts)
 
       console.log(`Successfully loaded ${fontList.length} fonts`)
     } catch (error) {
diff --git a/frontend/src/services/font-file-api.ts b/frontend/src/services/font-file-api.ts
new file mode 100644
index 0000000..d573a2c
--- /dev/null
+++ b/frontend/src/services/font-file-api.ts
@@ -0,0 +1,62 @@
+import type { FontListItem } from '../types/font'
+
+interface FontMutationSuccessResponse {
+  success: true
+  fontList: FontListItem[]
+}
+
+interface FontMutationErrorResponse {
+  success: false
+  message?: string
+}
+
+type FontMutationResponse = FontMutationSuccessResponse | FontMutationErrorResponse
+
+async function requestFontMutation(
+  endpoint: string,
+  payload: Record<string, string>,
+): Promise<FontListItem[]> {
+  const response = await fetch(endpoint, {
+    method: 'POST',
+    headers: {
+      'Content-Type': 'application/json',
+    },
+    body: JSON.stringify(payload),
+  })
+
+  let body: FontMutationResponse | null = null
+  try {
+    body = (await response.json()) as FontMutationResponse
+  } catch {
+    // ignore parse errors and fallback to status text
+  }
+
+  if (!response.ok || !body || body.success !== true) {
+    const message =
+      body && body.success === false && body.message
+        ? body.message
+        : `请求失败（${response.status}）`
+    throw new Error(message)
+  }
+
+  return body.fontList
+}
+
+/**
+ * 重命名字体文件并返回最新字体列表。
+ */
+export function renameFontFile(fontPath: string, newName: string): Promise<FontListItem[]> {
+  return requestFontMutation('/api/fonts/rename', {
+    path: fontPath,
+    newName,
+  })
+}
+
+/**
+ * 删除字体文件并返回最新字体列表。
+ */
+export function deleteFontFile(fontPath: string): Promise<FontListItem[]> {
+  return requestFontMutation('/api/fonts/delete', {
+    path: fontPath,
+  })
+}
diff --git a/frontend/src/stores/fontStore.ts b/frontend/src/stores/fontStore.ts
index 620fdc0..84f22c5 100644
--- a/frontend/src/stores/fontStore.ts
+++ b/frontend/src/stores/fontStore.ts
@@ -23,6 +23,10 @@ export const useFontStore = defineStore('font', () => {
     }
   }
 
+  function filterSetByValidIds(source: Set<string>, validIds: Set<string>): Set<string> {
+    return new Set(Array.from(source).filter(id => validIds.has(id)))
+  }
+
   // 状态
   const fonts = ref<FontInfo[]>([])
   const selectedFontIds = ref<Set<string>>(new Set())
@@ -54,6 +58,23 @@ export const useFontStore = defineStore('font', () => {
     fonts.value.push(fontInfo)
   }
 
+  function replaceFonts(nextFonts: FontInfo[]) {
+    const validIds = new Set(nextFonts.map(font => font.id))
+
+    selectedFontIds.value = filterSetByValidIds(selectedFontIds.value, validIds)
+    favoriteFontIds.value = filterSetByValidIds(favoriteFontIds.value, validIds)
+    previewFontIds.value = filterSetByValidIds(previewFontIds.value, validIds)
+
+    writeSet('font.favoriteFontIds', favoriteFontIds.value)
+    writeSet('font.previewFontIds', previewFontIds.value)
+
+    fonts.value = nextFonts.map(font => ({
+      ...font,
+      isFavorite: favoriteFontIds.value.has(font.id),
+    }))
+    updateFontTree()
+  }
+
   function removeFont(fontId: string) {
     const index = fonts.value.findIndex(f => f.id === fontId)
     if (index !== -1) {
@@ -229,6 +250,7 @@ export const useFontStore = defineStore('font', () => {
     
     // 方法
     addFont,
+    replaceFonts,
     removeFont,
     selectFont,
     unselectFont,
diff --git a/frontend/src/types/font.d.ts b/frontend/src/types/font.d.ts
index 54c56b6..cedf3e9 100644
--- a/frontend/src/types/font.d.ts
+++ b/frontend/src/types/font.d.ts
@@ -22,6 +22,22 @@ export interface FontInfo {
   progress: number
 }
 
+/**
+ * fonts.json 字体清单项
+ */
+export interface FontListItem {
+  /** 字体唯一标识 */
+  id: string
+  /** 字体文件名（不含扩展名） */
+  name: string
+  /** 字体文件名（含扩展名） */
+  filename: string
+  /** 字体分类（目录名） */
+  category: string
+  /** 静态访问路径 */
+  path: string
+}
+
 /**
  * 字体树节点
  */
diff --git a/frontend/src/utils/font-list.ts b/frontend/src/utils/font-list.ts
new file mode 100644
index 0000000..cb87473
--- /dev/null
+++ b/frontend/src/utils/font-list.ts
@@ -0,0 +1,23 @@
+import type { FontInfo, FontListItem } from '../types/font'
+
+/**
+ * 将 fonts.json 项转换为 FontInfo 运行时结构。
+ */
+export function toFontInfo(item: FontListItem): FontInfo {
+  return {
+    id: item.id,
+    name: item.name,
+    path: item.path,
+    category: item.category,
+    isFavorite: false,
+    loaded: false,
+    progress: 0,
+  }
+}
+
+/**
+ * 批量转换字体清单。
+ */
+export function toFontInfoList(items: FontListItem[]): FontInfo[] {
+  return items.map(toFontInfo)
+}