feat(mindspace): 公开页分享组件、workspace 路径与 Plaza 发布增强

- 新增 public share widget 与 workspace relative path 解析
- 增强 publications/chat-plaza 发布链路与缩略图 demo
- 补充 schema、cover 检查脚本与回归测试

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

mindspace-pages.mjs

@@ -446,6 +446,8 @@ export function createPageService(pool, options = {}) {
         source.createdAt != null && Number.isFinite(Number(source.createdAt))
           ? Math.floor(Number(source.createdAt))
           : Date.now();
+      const pageWorkspaceRelativePath =
+        normalizeWorkspaceRelativePath(source.snapshot?.relative_path) || null;
 
       const contentAssetType = normalized.contentFormat === 'html' ? 'html' : 'markdown';
       const contentMimeType =
@@ -498,8 +500,8 @@ export function createPageService(pool, options = {}) {
           `INSERT INTO h5_page_records
            (id, user_id, space_id, category_id, source_session_id, source_message_id,
             source_asset_id, title, summary, page_type, template_id, draft_content_ref,
-            current_version_id, status, visibility, created_at, updated_at)
-           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'draft', 'private', ?, ?)`,
+            workspace_relative_path, current_version_id, status, visibility, created_at, updated_at)
+           VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'draft', 'private', ?, ?)`,
           [
             pageId,
             userId,
@@ -513,6 +515,7 @@ export function createPageService(pool, options = {}) {
             normalized.pageType,
             normalized.templateId,
             stored.storageKey,
+            pageWorkspaceRelativePath,
             pageVersionId,
             now,
             now,
@@ -539,7 +542,7 @@ export function createPageService(pool, options = {}) {
         await conn.query(
           `UPDATE h5_page_records
            SET title = ?, summary = ?, page_type = ?, template_id = ?,
-               draft_content_ref = ?, current_version_id = ?, updated_at = ?
+               draft_content_ref = ?, workspace_relative_path = ?, current_version_id = ?, updated_at = ?
            WHERE id = ? AND user_id = ?`,
           [
             normalized.title,
@@ -547,6 +550,7 @@ export function createPageService(pool, options = {}) {
             normalized.pageType,
             normalized.templateId,
             stored.storageKey,
+            pageWorkspaceRelativePath,
             pageVersionId,
             now,
             pageId,
@@ -659,14 +663,52 @@ export function createPageService(pool, options = {}) {
        LEFT JOIN h5_publish_records pr ON pr.id = p.current_publish_id AND pr.status = 'online'
        WHERE p.user_id = ?
          AND p.status <> 'deleted'
-         AND JSON_UNQUOTE(JSON_EXTRACT(pv.source_snapshot_json, '$.relative_path')) = ?
+         AND (
+           p.workspace_relative_path = ?
+           OR (
+             (p.workspace_relative_path IS NULL OR p.workspace_relative_path = '')
+             AND JSON_UNQUOTE(JSON_EXTRACT(pv.source_snapshot_json, '$.relative_path')) = ?
+           )
+         )
        ORDER BY p.updated_at DESC, p.id DESC
        LIMIT 1`,
-      [userId, normalized],
+      [userId, normalized, normalized],
     );
     return rows[0] ? pageResponse(rows[0]) : null;
   };
 
+  const findPlazaContextByWorkspacePath = async (userId, relativePath) => {
+    const normalized = normalizeWorkspaceRelativePath(relativePath);
+    if (!normalized) return null;
+    const [rows] = await pool.query(
+      `SELECT p.id AS page_id, pr.id AS publication_id, pp.id AS post_id, pp.status AS post_status
+       FROM h5_page_records p
+       JOIN h5_page_versions pv ON pv.id = p.current_version_id
+       LEFT JOIN h5_publish_records pr ON pr.page_id = p.id AND pr.user_id = p.user_id AND pr.status = 'online'
+       LEFT JOIN plaza_posts pp ON pp.publication_id = pr.id AND pp.user_id = p.user_id AND pp.status != 'hidden'
+       WHERE p.user_id = ?
+         AND p.status <> 'deleted'
+         AND (
+           p.workspace_relative_path = ?
+           OR JSON_UNQUOTE(JSON_EXTRACT(pv.source_snapshot_json, '$.relative_path')) = ?
+         )
+       ORDER BY
+         CASE pp.status WHEN 'published' THEN 0 WHEN 'pending_review' THEN 1 ELSE 2 END,
+         p.updated_at DESC,
+         p.id DESC
+       LIMIT 1`,
+      [userId, normalized, normalized],
+    );
+    const row = rows[0];
+    if (!row) return null;
+    return {
+      pageId: row.page_id,
+      publicationId: row.publication_id ?? null,
+      postId: row.post_id ?? null,
+      postStatus: row.post_status ?? null,
+    };
+  };
+
   const listPages = async (userId, filters = {}) => {
     const clauses = [`p.user_id = ?`, `p.status <> 'deleted'`];
     const params = [userId];
@@ -1448,6 +1490,7 @@ export function createPageService(pool, options = {}) {
     findPageBySourceAsset,
     findPageBySourceMessage,
     findPageByRelativePath,
+    findPlazaContextByWorkspacePath,
     getPage,
     getDeletePreview,
     deletePage,