feat(info): 信息面板 UI 重做 + 双向批量关联 + 代码块内全选复制

1. 信息面板 UI 重做：设计 token 统一、lucide 图标、分区小节、星标/标签/关联 chip 化
2. 关联文档升级：新增 doc:link-batch IPC，A↔B 双向写入 links；面板支持快速双向关联 + 批量勾选关联/解除
3. 代码块内全选复制：Ctrl+A 在代码块内仅全选该代码块（TyporaKeys selectInsideCodeBlock），Ctrl+C 复制纯代码；代码块内 Ctrl+V 按纯文本粘贴
4. 修复 React error #62：btn 改为函数后遗漏 style={btn} 裸用，导致 render 期间更新

apps/desktop/src/renderer/store.ts

@@ -28,6 +28,7 @@ interface EditorState {
   toggleStar: () => void;
   addLink: (link: string) => void;
   removeLink: (link: string) => void;
+  linkBatch: (targets: string[], remove: boolean) => Promise<void>;
   saveNow: () => Promise<void>;
   reloadDoc: () => Promise<boolean>; // FR-S6：重新加载——检测 mtime 变化，有未保存改动时返回 false 需确认
   resetEditor: () => void;                          // FR-V6: 切库时重置编辑区
@@ -90,15 +91,20 @@ export const useStore = create<EditorState>((set, get) => ({
     set({ meta: { ...get().meta, star: !get().meta.star } });
     get().saveNow();
   },
-  addLink: (link: string) => {
-    const links = [...(get().meta.links ?? []), link].filter((l, i, a) => a.indexOf(l) === i);
-    set({ meta: { ...get().meta, links } });
-    get().saveNow();
-  },
-  removeLink: (link: string) => {
-    const links = (get().meta.links ?? []).filter(l => l !== link);
-    set({ meta: { ...get().meta, links } });
-    get().saveNow();
+  addLink: (link: string) => { void get().linkBatch([link], false); },
+  removeLink: (link: string) => { void get().linkBatch([link], true); },
+  // 双向批量关联：先冲刷编辑器内容落盘，再由主进程把当前文档与每个目标文档互相写入 links
+  linkBatch: async (targets: string[], remove: boolean) => {
+    const { currentPath } = get();
+    if (!currentPath || targets.length === 0) return;
+    window.dispatchEvent(new CustomEvent('dsh-flush-body'));
+    await get().saveNow();
+    try {
+      const res = await invoke(IPC.docLinkBatch, { path: currentPath, targets, remove });
+      set({ meta: { ...get().meta, links: res.links } });
+    } catch (e) {
+      console.error('linkBatch failed', e);
+    }
   },
   setBody: (body: string) => {
     set({ body, saveState: 'saving' });