feat(mindspace): add per-user OA cloud drive with fds-style file manager

Expose authenticated /api/mindspace/v1/oa/drive APIs over each user's oa/ workspace and wire a MindSpace entry at /space/oa/drive.

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

src/components/MindSpaceView.tsx

@@ -512,6 +512,7 @@ type MindSpaceRouteSync = {
   pushWechatConfig: () => void;
   pushCategory: (code: MindSpaceSaveCategory | MindSpaceCategory['code']) => void;
   pushPage: (pageId: string) => void;
+  pushOaDrive?: () => void;
 };
 
 function MindSpaceBalanceRing() {
@@ -2862,15 +2863,26 @@ export function MindSpaceView({
                     </p>
                     <h2>{selectedCategory.name}</h2>
                   </div>
-                  {['oa', 'public', 'health'].includes(selectedCategory.code) && (
-                    <button
-                      type="button"
-                      className="mindspace-primary"
-                      onClick={() => openUpload(selectedCategory)}
-                    >
-                      {selectedCategory.code === 'health' ? '上传报告' : '上传资料'}
-                    </button>
-                  )}
+                  <div className="mindspace-category-actions">
+                    {selectedCategory.code === 'oa' && routeSync?.pushOaDrive && (
+                      <button
+                        type="button"
+                        className="mindspace-secondary"
+                        onClick={() => routeSync.pushOaDrive?.()}
+                      >
+                        文件管理
+                      </button>
+                    )}
+                    {['oa', 'public', 'health'].includes(selectedCategory.code) && (
+                      <button
+                        type="button"
+                        className="mindspace-primary"
+                        onClick={() => openUpload(selectedCategory)}
+                      >
+                        {selectedCategory.code === 'health' ? '上传报告' : '上传资料'}
+                      </button>
+                    )}
+                  </div>
                 </div>
 
                 {selectedCategory.code === 'health' ? (