feat(metadata): parse and mixin extraJsonMetaInfo field

Add support for parsing the extraJsonMetaInfo field from image metadata.
The field values are merged into the meta dictionary with all values
ensured to be strings for safety.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

scripts/iib/tool.py

@@ -680,6 +680,20 @@ def parse_generation_parameters(x: str):
     if not x:
         return {"meta": {}, "pos_prompt": [], "lora": [], "lyco": []}
 
+    # 提取并混入 extraJsonMetaInfo 字段
+    extra_json_match = re.search(r'\nextraJsonMetaInfo:\s*(\{[\s\S]*\})\s*$', x.strip())
+    if extra_json_match:
+        try:
+            extra_json_meta_info = json.loads(extra_json_match.group(1))
+            # 混入到 res 中，确保所有值都是字符串
+            for k, v in extra_json_meta_info.items():
+                res[k] = json.dumps(v) if not isinstance(v, str) else v
+            # 从原始参数中移除 extraJsonMetaInfo 部分
+            x = re.sub(r'\nextraJsonMetaInfo:\s*\{[\s\S]*\}\s*$', '', x.strip())
+        except json.JSONDecodeError:
+            # 解析失败，保留原始字符串
+            pass
+
     *lines, lastline = x.strip().split("\n")
     if len(re_param.findall(lastline)) < 3:
         lines.append(lastline)