chore: 工具链升级到最新版本（Vite 8 / React 19 / react-router 8 / TS 7 / Go 1.26 依赖更新）

- 前端：vite ^8.2.2、react/react-dom ^19.2.8、react-router ^8.3.1（移除 react-router-dom）、typescript ^7.0.2、zustand ^5.0.15；适配升级带来的类型变化（react-hook-form Resolver、ProseMirror node.parent、tiptap focus 参数、timer undefined 等）
- 后端：升级 gin/jwt/minio-go/gorm/modernc-sqlite/x-crypto 等直接依赖至最新；gowebp v0.1.1 已是最新版本
- tsconfig 移除 baseUrl，paths 改为相对路径以兼容 TS7

frontend/src/utils/markdownContent.ts

@@ -10,8 +10,8 @@ const GATED_BLOCK_RE = /<(members-only|reply-only)(?:\s[^>]*)?>([\s\S]*?)<\/\1>/
 const TURNDOWN_OPTIONS = {
   headingStyle: 'atx' as const,
   codeBlockStyle: 'fenced' as const,
-  emDelimiter: '*',
-  bulletListMarker: '-',
+  emDelimiter: '*' as const,
+  bulletListMarker: '-' as const,
 };
 
 /** 仅去除区块首尾空行，保留各行行首缩进 */
@@ -135,7 +135,7 @@ function addTurndownContentRules(service: TurndownService): void {
   });
 
   service.addRule('strikethrough', {
-    filter: ['del', 's', 'strike'],
+    filter: (node) => ['DEL', 'S', 'STRIKE'].includes(node.nodeName),
     replacement: (content) => `~~${content}~~`,
   });
 
@@ -234,12 +234,12 @@ function gatedBlockToMarkdown(tag: 'members-only' | 'reply-only', node: HTMLElem
 }
 
 turndown.addRule('membersOnly', {
-  filter: 'members-only',
+  filter: (node) => node.nodeName === 'MEMBERS-ONLY',
   replacement: (_content, node) => gatedBlockToMarkdown('members-only', node as HTMLElement),
 });
 
 turndown.addRule('replyOnly', {
-  filter: 'reply-only',
+  filter: (node) => node.nodeName === 'REPLY-ONLY',
   replacement: (_content, node) => gatedBlockToMarkdown('reply-only', node as HTMLElement),
 });