fix: 分离覆盖率数据生成和报告生成步骤

- 将覆盖率生成分为两个独立步骤
- 先运行moon coverage analyze生成数据
- 再运行moon coverage report生成报告
- 确保覆盖率数据正确生成后再生成报告

Author: conisng

.github/workflows/ci.yml

@@ -23,10 +23,13 @@ jobs:
         moon check
         moon test
     
-    - name: Generate Coverage Report
+    - name: Generate Coverage Data
       run: |
         moon coverage clean
         moon coverage analyze
+    
+    - name: Generate Coverage Report
+      run: |
         moon coverage report -f coveralls -o coverage.json
         ls -la coverage.json