Declare Python dependency in SKILL.md frontmatter

[Copilot]

The SKILL.md frontmatter was missing the dependency.python field to declare the requests>=2.28.0 dependency required by scripts/generate.py.

Changes

• Added dependency.python: requests>=2.28.0 to the SKILL.md YAML frontmatter

---
name: chart-visualization
description: This skill should be used when the user wants to visualize data...
dependency:
  python: requests>=2.28.0
---

This ensures the Python dependency is properly declared for the chart generation script, which uses requests for HTTP calls to the visualization service.

Original prompt

修复一下下面的问题：

SKILL.md 前言区缺少 dependency.python 字段声明 Python 依赖。

解法：

补充依赖声明：在 SKILL.md 前言区添加 dependency.python 字段，声明 requests>=2.28.0（scripts/generate.py 使用了该库）

---

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[hustcc]

/gemini review

[gemini-code-assist]

Code Review

This pull request correctly adds the missing Python dependency requests to the SKILL.md frontmatter, which is required by scripts/generate.py. The change is accurate and addresses the issue. I have included one suggestion to enhance the dependency's version constraint for better long-term stability.