Remove flat style from coverage badge

Switch to default badge style by removing the style parameter.

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

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

Author: knowledgecode

.github/workflows/test.yml

@@ -64,7 +64,6 @@ jobs:
         status: ${{ steps.coverage.outputs.pct }}%
         color: ${{ fromJSON(steps.coverage.outputs.pct) >= 80 && 'green' || fromJSON(steps.coverage.outputs.pct) >= 60 && 'yellow' || 'red' }}
         path: badges/coverage.svg
-        style: flat
 
     - name: Commit coverage badge
       run: |
@@ -78,4 +77,4 @@ jobs:
       uses: actions/upload-artifact@v4
       with:
         name: coverage-report
-        path: coverage/
+        path: coverage/