Fix memoir image delivery and Android rendering

api/tests/test_memoir_image_parser.py

@@ -43,3 +43,12 @@ class MemoirImageParserTest(unittest.TestCase):
         self.assertEqual(assets[0]["status"], "pending")
         self.assertEqual(assets[0]["provider"], "liblib")
         self.assertEqual(assets[0]["url"], None)
+
+    def test_parse_image_placeholders_accepts_double_brace_variant(self):
+        content = "开头。\n\n{{IMAGE:1938年初的上海弄堂口，冬日萧瑟}}\n\n结尾。"
+
+        items = parse_image_placeholders(content, max_images=2)
+
+        self.assertEqual(len(items), 1)
+        self.assertEqual(items[0]["placeholder"], "{{IMAGE:1938年初的上海弄堂口，冬日萧瑟}}")
+        self.assertEqual(items[0]["description"], "1938年初的上海弄堂口，冬日萧瑟")