fix(editor): support mention user itself (#11133)

blocksuite/affine/inlines/mention/src/inline-spec.ts

@@ -12,7 +12,7 @@ export const MentionInlineSpecExtension =
       schema: z
         .object({
           member: z.string(),
-          notification: z.string(),
+          notification: z.string().optional(),
         })
         .optional()
         .nullable()

blocksuite/affine/shared/src/types/index.ts

@@ -75,7 +75,7 @@ export interface AffineTextAttributes {
   footnote?: FootNote | null;
   mention?: {
     member: string;
-    notification: string;
+    notification?: string;
   } | null;
 }