chore: 添加git提交消息规范文件

新增项目专属的git提交消息规则文档，统一团队提交规范，确保commit消息格式、语言和内容符合要求

.trae/rules/git-commit-message.md

@@ -0,0 +1,19 @@
+---
+alwaysApply: true
+scene: git_message
+---
+
+## Git Commit Message Rules
+
+### Language Requirement
+- All generated commit messages **MUST BE in Chinese (中文)**.
+- Do NOT use English for commit messages.
+
+### Format Requirement
+- First line: Short description (under 50 characters)
+- Empty line
+- Body (optional): Detailed description of changes and reasons
+
+### Content Requirement
+- Clearly describe "What was changed" and "Why it was changed"
+- Keep it concise and accurate