fix: address code review issues from Claude and GPT-5.2

- report/SKILL.md: add AskUserQuestion to allowed-tools
- validate_json.py: remove unused imports (List, Any)
- validate_json.py: sort output lists for deterministic order
- validate_json.py: limit recursion to category level only
- validate_json.py: add list-of-dict handling
- EN validate_json.py: remove Chinese from CATEGORY_MAPPING
- EN deep/SKILL.md: change output language from Chinese to English
- deep/SKILL.md: add slug handling for filenames
- report/SKILL.md: fix uncertain_fields -> uncertain naming
- README: add PyYAML dependency note

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

skills/research-zh/deep/SKILL.md

@@ -28,7 +28,7 @@ allowed-tools: Bash, Read, Write, Glob, WebSearch, Task
 - `{item_related_info}`: item的完整yaml内容（name + category + description等）
 - `{output_dir}`: outline.yaml中execution.output_dir（默认./results）
 - `{fields_path}`: {topic}/fields.yaml的绝对路径
-- `{output_path}`: {output_dir}/{item_name}.json的绝对路径
+- `{output_path}`: {output_dir}/{item_name_slug}.json的绝对路径（slugify处理item_name：空格替换为_，移除特殊字符）
 
 **硬约束**：以下prompt必须严格复述，仅替换{xxx}中的变量，禁止改写结构或措辞。