Add PR comment with test result summary

- Parses test-results.json to extract pass/fail counts
- Posts comment with test summary table (total, passed, failed, pass rate)
- Updates existing comment on subsequent runs
- Includes link to detailed check run for failures
- Keeps detailed test results in Checks tab via dorny/test-reporter

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: PHKenny

.github/workflows/checks.yaml

@@ -38,3 +38,89 @@ jobs:
           name: Unit Tests
           path: test-results.json
           reporter: flutter-json
+
+      - name: Parse test results
+        if: always()
+        id: test_summary
+        run: |
+          if [ -f test-results.json ]; then
+            # Count total tests and failures from the JSON output
+            TOTAL=$(grep -c '"type":"testStart"' test-results.json || echo "0")
+            FAILED=$(grep -c '"result":"error"' test-results.json || echo "0")
+            PASSED=$((TOTAL - FAILED))
+
+            # Calculate percentage
+            if [ $TOTAL -gt 0 ]; then
+              PASS_RATE=$(awk "BEGIN {printf \"%.1f\", ($PASSED/$TOTAL)*100}")
+            else
+              PASS_RATE="0.0"
+            fi
+
+            echo "total=$TOTAL" >> $GITHUB_OUTPUT
+            echo "passed=$PASSED" >> $GITHUB_OUTPUT
+            echo "failed=$FAILED" >> $GITHUB_OUTPUT
+            echo "pass_rate=$PASS_RATE" >> $GITHUB_OUTPUT
+          else
+            echo "total=0" >> $GITHUB_OUTPUT
+            echo "passed=0" >> $GITHUB_OUTPUT
+            echo "failed=0" >> $GITHUB_OUTPUT
+            echo "pass_rate=0.0" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Comment test results
+        if: always()
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const total = '${{ steps.test_summary.outputs.total }}';
+            const passed = '${{ steps.test_summary.outputs.passed }}';
+            const failed = '${{ steps.test_summary.outputs.failed }}';
+            const passRate = '${{ steps.test_summary.outputs.pass_rate }}';
+
+            const emoji = failed === '0' ? '✅' : '❌';
+            const status = failed === '0' ? 'All tests passed!' : `${failed} test(s) failed`;
+
+            const body = `## ${emoji} Test Results
+
+            **Status:** ${status}
+
+            | Metric | Value |
+            |--------|-------|
+            | Total Tests | ${total} |
+            | Passed | ✅ ${passed} |
+            | Failed | ❌ ${failed} |
+            | Pass Rate | ${passRate}% |
+
+            ${failed !== '0' ? '⚠️ Please check the **Unit Tests** check run for detailed failure information.' : ''}
+
+            <sub>🤖 Automated test results from [checks workflow](${context.payload.repository.html_url}/actions/runs/${context.runId})</sub>`;
+
+            // Find existing comment
+            const comments = await github.rest.issues.listComments({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              issue_number: context.issue.number,
+            });
+
+            const botComment = comments.data.find(comment =>
+              comment.user.type === 'Bot' &&
+              comment.body.includes('## ✅ Test Results') || comment.body.includes('## ❌ Test Results')
+            );
+
+            if (botComment) {
+              // Update existing comment
+              await github.rest.issues.updateComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                comment_id: botComment.id,
+                body: body
+              });
+            } else {
+              // Create new comment
+              await github.rest.issues.createComment({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                issue_number: context.issue.number,
+                body: body
+              });
+            }