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>

src/components/ChatPlazaPublishModal.tsx

@@ -1,10 +1,11 @@
-import { useEffect, useRef, useState } from 'react';
+import { useCallback, useEffect, useRef, useState } from 'react';
 import { createPortal } from 'react-dom';
 import { ApiError, quickPlazaFromChat } from '../api/client';
 import { resolvePlazaPostUrl } from '../utils/publicUrl';
 import { ChatLoadingSpinner } from './ChatLoadingSpinner';
 
 type PlazaPublishPhase =
+  | { kind: 'confirm' }
   | { kind: 'loading' }
   | { kind: 'success'; plazaUrl: string }
   | { kind: 'already'; plazaUrl: string; message: string }
@@ -28,11 +29,15 @@ export function ChatPlazaPublishModal({
   messageId: string;
   onClose: () => void;
 }) {
-  const [phase, setPhase] = useState<PlazaPublishPhase>({ kind: 'loading' });
+  const [phase, setPhase] = useState<PlazaPublishPhase>({ kind: 'confirm' });
   const closeTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
   const onCloseRef = useRef(onClose);
   onCloseRef.current = onClose;
 
+  const startPublish = useCallback(() => {
+    setPhase({ kind: 'loading' });
+  }, []);
+
   useEffect(() => {
     const prev = document.body.style.overflow;
     document.body.style.overflow = 'hidden';
@@ -52,6 +57,7 @@ export function ChatPlazaPublishModal({
   }, [onClose, phase.kind]);
 
   useEffect(() => {
+    if (phase.kind !== 'loading') return;
     const controller = new AbortController();
 
     void quickPlazaFromChat({ sessionId, messageId }, controller.signal)
@@ -79,7 +85,7 @@ export function ChatPlazaPublishModal({
       });
 
     return () => controller.abort();
-  }, [sessionId, messageId]);
+  }, [phase.kind, sessionId, messageId]);
 
   const canClose = phase.kind !== 'loading';
 
@@ -97,6 +103,21 @@ export function ChatPlazaPublishModal({
         aria-busy={phase.kind === 'loading'}
         onClick={(event) => event.stopPropagation()}
       >
+        {phase.kind === 'confirm' && (
+          <div className="chat-plaza-publish-body">
+            <h3 id="chat-plaza-publish-title">发布到 Plaza</h3>
+            <p>将把当前对话内容保存为公开页面并推送到发现广场，确认继续？</p>
+            <div className="chat-plaza-publish-actions">
+              <button type="button" className="chat-plaza-publish-close-btn" onClick={onClose}>
+                取消
+              </button>
+              <button type="button" className="chat-plaza-publish-confirm-btn" onClick={startPublish}>
+                确认发布
+              </button>
+            </div>
+          </div>
+        )}
+
         {phase.kind === 'loading' && (
           <div className="chat-plaza-publish-body">
             <ChatLoadingSpinner className="chat-plaza-publish-spinner" />

src/index.css

@@ -1532,8 +1532,17 @@ body,
   text-underline-offset: 2px;
 }
 
-.chat-plaza-publish-close-btn {
+.chat-plaza-publish-actions {
+  display: flex;
+  flex-wrap: wrap;
+  justify-content: center;
+  gap: 10px;
+  width: 100%;
   margin-top: 8px;
+}
+
+.chat-plaza-publish-close-btn {
+  margin-top: 0;
   padding: 8px 18px;
   border: 1px solid rgba(24, 33, 29, 0.14);
   border-radius: 999px;
@@ -1544,11 +1553,27 @@ body,
   font-size: 14px;
 }
 
+.chat-plaza-publish-confirm-btn {
+  padding: 8px 18px;
+  border: 1px solid rgba(47, 111, 87, 0.35);
+  border-radius: 999px;
+  background: #2f6f57;
+  color: #fff;
+  cursor: pointer;
+  font: inherit;
+  font-size: 14px;
+  font-weight: 600;
+}
+
 .chat-plaza-publish-close-btn:hover {
   border-color: rgba(47, 111, 87, 0.35);
   color: #2f6f57;
 }
 
+.chat-plaza-publish-confirm-btn:hover {
+  background: #265a46;
+}
+
 .page-save-panel {
   display: flex;
   flex-direction: column;

src/utils/mindspaceCards.ts

@@ -56,8 +56,8 @@ export function isImageAsset(asset: MindSpaceAsset) {
   return asset.assetType === 'image' || asset.mimeType.startsWith('image/');
 }
 
-export function buildAssetImageUrl(asset: Pick<MindSpaceAsset, 'id' | 'updatedAt' | 'publicUrl'>) {
-  if (asset.publicUrl) return asset.publicUrl;
+export function buildAssetImageUrl(asset: Pick<MindSpaceAsset, 'id' | 'updatedAt'>) {
+  // MindSpace 空间内始终走受鉴权的下载接口，避免 publicUrl（imgproxy / 公开静态路径）在本地或工作区资产上失效。
   return `/api/mindspace/v1/assets/${asset.id}/download?inline=1&viewer=0&v=${asset.updatedAt}`;
 }