fix(ci): bun test 输出写到文件避免 GitHub log 截断

.github/workflows/ci.yml

@@ -29,11 +29,13 @@ jobs:
       - name: Test
         run: |
           set +e
-          bun test 2>&1 | tee /tmp/ci-test.log
+          bun test > /tmp/ci-test.log 2>&1
           TEST_EXIT=$?
           FAILS=$(grep -oE '[0-9]+ fail' /tmp/ci-test.log | tail -1 | grep -oE '[0-9]+')
           if [ -z "$FAILS" ]; then FAILS=0; fi
           echo "Failures: $FAILS (baseline: 4) | bun test exit: $TEST_EXIT"
+          # Show last 30 lines of test output
+          tail -30 /tmp/ci-test.log
           if [ "$FAILS" -le 4 ]; then
             echo "✅ Test baseline OK"
           else