完善 TipTap 编辑器与个人资料页：头像裁剪、Tab 缩进、文章内链、Markdown 工具与 Tooltip，并更新样式与 Feed 缓存。

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/editor/ArticleLinkDialog.tsx

@@ -0,0 +1,76 @@
+import { useEffect, useState } from 'react';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+} from '@/components/ui/dialog';
+import { Input } from '@/components/ui/input';
+import { Button } from '@/components/ui/button';
+
+interface Props {
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  initialUrl?: string;
+  onConfirm: (url: string) => void;
+  onRemove?: () => void;
+}
+
+/** 文章编辑器链接输入弹窗 */
+export function ArticleLinkDialog({
+  open,
+  onOpenChange,
+  initialUrl = '',
+  onConfirm,
+  onRemove,
+}: Props) {
+  const [url, setUrl] = useState(initialUrl);
+
+  useEffect(() => {
+    if (open) setUrl(initialUrl || 'https://');
+  }, [open, initialUrl]);
+
+  const handleConfirm = () => {
+    onConfirm(url.trim());
+    onOpenChange(false);
+  };
+
+  return (
+    <Dialog open={open} onOpenChange={onOpenChange}>
+      <DialogContent className="article-link-dialog">
+        <DialogHeader>
+          <DialogTitle>插入链接</DialogTitle>
+          <DialogDescription>输入完整 URL，留空并确认可移除已有链接。</DialogDescription>
+        </DialogHeader>
+        <Input
+          type="url"
+          value={url}
+          placeholder="https://"
+          onChange={e => setUrl(e.target.value)}
+          onKeyDown={e => {
+            if (e.key === 'Enter') {
+              e.preventDefault();
+              handleConfirm();
+            }
+          }}
+          autoFocus
+        />
+        <DialogFooter className="article-link-dialog__footer">
+          {onRemove && initialUrl ? (
+            <Button type="button" variant="outline" onClick={() => { onRemove(); onOpenChange(false); }}>
+              移除链接
+            </Button>
+          ) : null}
+          <Button type="button" variant="outline" onClick={() => onOpenChange(false)}>
+            取消
+          </Button>
+          <Button type="button" onClick={handleConfirm}>
+            确定
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}