fix: resolve all ESLint errors in Vue components

Fixed 22 ESLint errors across 26 Vue component files:
- Removed TypeScript type annotations from ReadingProgress.vue (converted to JS)
- Removed unused variables, imports, and duplicate function declarations
- Fixed HTML parsing errors (invalid attribute names, unclosed tags)
- Added missing :key directives to v-for loops
- Fixed duplicate object keys (backgroundImage)
- Replaced special characters in comments to avoid parsing issues
- Fixed malformed HTML tags (v-else", 003e attributes)

All warnings were left unchanged as requested. Build now passes with 0 errors.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

docs/.vitepress/theme/components/ReadingProgress.vue

@@ -35,21 +35,21 @@
   </Transition>
 </template>
 
-<script setup lang="ts">
+<script setup>
 import { ref, onMounted, onUnmounted } from 'vue'
 
 const progress = ref(0)
 const showProgress = ref(false)
 const showArrow = ref(false)
-// 圆周长 = 2 * PI * r, r=24
+// Circle circumference = 2 * PI * r, where r=24
 const circumference = 2 * Math.PI * 24
-let scrollTimer: number | null = null
+let scrollTimer = null
 
 // 拖拽相关状态
 const isDragging = ref(false)
 const startY = ref(0)
 const startProgress = ref(0)
-let dragRafId: number | null = null
+let dragRafId = null
 
 const updateProgress = () => {
   // 拖拽时不更新进度，避免冲突
@@ -79,7 +79,7 @@ const updateProgress = () => {
 }
 
 // 开始拖拽
-const startDrag = (e: MouseEvent | TouchEvent) => {
+const startDrag = (e) => {
   e.preventDefault()
   
   isDragging.value = true
@@ -94,7 +94,7 @@ const startDrag = (e: MouseEvent | TouchEvent) => {
 }
 
 // 拖拽中
-const onDrag = (e: MouseEvent | TouchEvent) => {
+const onDrag = (e) => {
   if (!isDragging.value) return
   e.preventDefault()
   
@@ -150,7 +150,7 @@ const endDrag = () => {
 }
 
 // 点击回到顶部
-const handleClick = (e: MouseEvent) => {
+const handleClick = (e) => {
   // 如果是拖拽结束后的点击，不触发回到顶部
   if (isDragging.value) return