chore: 添加.gitignore和项目状态报告

- 添加 .gitignore 排除临时文件、构建产物、IDE配置等
- 添加 PROJECT_STATUS_REPORT.md 详细记录项目当前状态
  - 覆盖率: 指令81.89%, 行88.48%, 分支51.55%
  - 1266个测试用例全部通过
  - 核心功能模块完成情况
  - 待办事项和技术债务清单

.gitignore

@@ -0,0 +1,53 @@
+# Maven
+target/
+.m2/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+
+# IDE
+.idea/
+*.iml
+.vscode/
+.eclipse/
+.settings/
+.project
+.classpath
+
+# Claude
+.claude/
+
+# Serena
+.serena/
+
+# Testing
+.testing-autonomous/
+.spec-workflow/
+test-results/
+e2e-report/
+e2e-results/
+
+# Logs
+*.log
+logs/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Temporary files
+*.tmp
+*.bak
+*.swp
+*~
+.attach_pid*
+
+# Node (if frontend exists)
+node_modules/
+package-lock.json