fix: resolve TypeScript errors in frontend build

node_modules/@tiptap/extension-paragraph/src/index.ts

@@ -0,0 +1,5 @@
+import { Paragraph } from './paragraph.js'
+
+export * from './paragraph.js'
+
+export default Paragraph

node_modules/@tiptap/extension-paragraph/src/paragraph.ts

@@ -0,0 +1,127 @@
+import { mergeAttributes, Node } from '@tiptap/core'
+
+export interface ParagraphOptions {
+  /**
+   * The HTML attributes for a paragraph node.
+   * @default {}
+   * @example { class: 'foo' }
+   */
+  HTMLAttributes: Record<string, any>
+}
+
+declare module '@tiptap/core' {
+  interface Commands<ReturnType> {
+    paragraph: {
+      /**
+       * Toggle a paragraph
+       * @example editor.commands.toggleParagraph()
+       */
+      setParagraph: () => ReturnType
+    }
+  }
+}
+
+/**
+ * Markdown marker for empty paragraphs to preserve blank lines.
+ * Using &nbsp; (non-breaking space HTML entity) ensures the paragraph
+ * is not collapsed by markdown parsers while remaining human-readable.
+ */
+const EMPTY_PARAGRAPH_MARKDOWN = '&nbsp;'
+
+/**
+ * Unicode character for non-breaking space (U+00A0).
+ * Some markdown parsers may convert &nbsp; entities to this literal character.
+ */
+const NBSP_CHAR = '\u00A0'
+
+/**
+ * This extension allows you to create paragraphs.
+ * @see https://www.tiptap.dev/api/nodes/paragraph
+ */
+export const Paragraph = Node.create<ParagraphOptions>({
+  name: 'paragraph',
+
+  priority: 1000,
+
+  addOptions() {
+    return {
+      HTMLAttributes: {},
+    }
+  },
+
+  group: 'block',
+
+  content: 'inline*',
+
+  parseHTML() {
+    return [{ tag: 'p' }]
+  },
+
+  renderHTML({ HTMLAttributes }) {
+    return ['p', mergeAttributes(this.options.HTMLAttributes, HTMLAttributes), 0]
+  },
+
+  parseMarkdown: (token, helpers) => {
+    const tokens = token.tokens || []
+
+    // Special case: if paragraph contains only a single image token,
+    // unwrap it to avoid nesting block elements incorrectly
+    if (tokens.length === 1 && tokens[0].type === 'image') {
+      // Parse the image token directly as a block element
+      return helpers.parseChildren([tokens[0]])
+    }
+
+    // Parse the inline tokens
+    const content = helpers.parseInline(tokens)
+
+    // Special case: if paragraph contains only &nbsp; (non-breaking space),
+    // treat it as an empty paragraph to preserve blank lines
+    if (
+      content.length === 1 &&
+      content[0].type === 'text' &&
+      (content[0].text === EMPTY_PARAGRAPH_MARKDOWN || content[0].text === NBSP_CHAR)
+    ) {
+      return helpers.createNode('paragraph', undefined, [])
+    }
+
+    // Convert 'paragraph' token to paragraph node
+    return helpers.createNode('paragraph', undefined, content)
+  },
+
+  renderMarkdown: (node, h, ctx) => {
+    if (!node) {
+      return ''
+    }
+
+    // Normalize content: treat undefined/null as empty array
+    const content = Array.isArray(node.content) ? node.content : []
+
+    if (content.length === 0) {
+      // Emit &nbsp; for the second and later empty paragraphs in a consecutive
+      // run at the current nesting level. The first empty paragraph stays empty
+      // so markdown spacing is preserved naturally.
+      const previousContent = Array.isArray(ctx?.previousNode?.content) ? ctx.previousNode.content : []
+      const previousNodeIsEmptyParagraph = ctx?.previousNode?.type === 'paragraph' && previousContent.length === 0
+
+      return previousNodeIsEmptyParagraph ? EMPTY_PARAGRAPH_MARKDOWN : ''
+    }
+
+    return h.renderChildren(content)
+  },
+
+  addCommands() {
+    return {
+      setParagraph:
+        () =>
+        ({ commands }) => {
+          return commands.setNode(this.name)
+        },
+    }
+  },
+
+  addKeyboardShortcuts() {
+    return {
+      'Mod-Alt-0': () => this.editor.commands.setParagraph(),
+    }
+  },
+})