ci(P1-2): 删除 performance-check 中第一个死代码 step

performance-check job 中有两个 step 都在做性能测试：
- 第一个 step（118行）使用 while read 子 shell 方式，变量全部丢失，结果完全没用
- 第二个 step 使用函数方式，正确统计结果

删除无用的第一个 step，减少约一半的请求次数和执行时间。

.gitea/workflows/daily-check.yml

@@ -341,124 +341,6 @@ jobs:
       report: ${{ steps.report.outputs.report }}
 
     steps:
-      - name: Run performance baseline checks
-        id: perf
-        shell: sh
-        env:
-          STAGING_TEST_USER: ${{ secrets.STAGING_TEST_USER }}
-          STAGING_TEST_PASSWORD: ${{ secrets.STAGING_TEST_PASSWORD }}
-        run: |
-          set +e
-          START_TIME=$(date +%s)
-          echo "=========================================="
-          echo "  性能基线巡检 - Staging API"
-          echo "  目标: https://staging-api.xiaoxiajianji.com"
-          echo "=========================================="
-          echo ""
-
-          TOTAL=0
-          PASS=0
-          FAIL=0
-          WARN=0
-          WARN_LIST=""
-          FAIL_LIST=""
-
-          # 核心接口配置: 名称|路径|方法|阈值(ms)|失败阈值(ms)
-          # 核心接口(core): 500ms
-          # 普通接口(normal): 1000ms
-          # 重操作接口(heavy): 3000ms
-          ENDPOINTS="
-          登录|/api/v1/auth/login|POST|500|3000
-          获取当前用户|/api/v1/auth/me|GET|500|3000
-          项目列表|/api/v1/projects|GET|500|3000
-          素材列表|/api/v1/assets|GET|500|3000
-          模板列表|/api/v1/templates|GET|500|3000
-          剪辑计划列表|/api/v1/edit-plans|GET|500|3000
-          生成任务列表|/api/v1/generation/tasks|GET|500|3000
-          订阅信息|/api/v1/subscription/current|GET|500|3000
-          音色列表|/api/v1/voices|GET|1000|5000
-          健康检查|/health|GET|200|1000
-          "
-
-          # 先登录获取 token
-          echo "--- 准备: 获取测试 Token ---"
-          AUTH_RESP=$(curl -s -w "\n%{http_code}" -X POST \
-            -H "Content-Type: application/json" \
-            -d "{"email":"${STAGING_TEST_USER}","password":"${STAGING_TEST_PASSWORD}"}" \
-            "https://staging-api.xiaoxiajianji.com/api/v1/auth/login" \
-            --max-time 10 2>&1)
-          AUTH_CODE=$(echo "$AUTH_RESP" | tail -1)
-          AUTH_BODY=$(echo "$AUTH_RESP" | sed '$d')
-
-          if [ "$AUTH_CODE" = "200" ]; then
-            TOKEN=$(echo "$AUTH_BODY" | python3 -c "import sys,json; d=json.load(sys.stdin); print(d.get('access_token',''))" 2>/dev/null)
-            if [ -n "$TOKEN" ]; then
-              echo "Token 获取成功"
-            else
-              echo "Token 解析失败，部分接口可能无法测试"
-              TOKEN=""
-            fi
-          else
-            echo "登录失败 (HTTP $AUTH_CODE)，部分接口将跳过鉴权测试"
-            TOKEN=""
-          fi
-
-          echo ""
-          echo "--- 开始性能测试 ---"
-          echo ""
-
-          echo "$ENDPOINTS" | while IFS='|' read -r name path method warn_ms fail_ms; do
-            [ -z "$name" ] && continue
-            TOTAL=$((TOTAL + 1))
-
-            # 构建 curl 命令
-            CURL_ARGS="-s -o /dev/null -w '%{http_code} %{time_total}' --max-time 30"
-            if [ "$method" = "POST" ]; then
-              CURL_ARGS="$CURL_ARGS -X POST -H 'Content-Type: application/json' -d '{\"email\":\"${STAGING_TEST_USER}\",\"password\":\"${STAGING_TEST_PASSWORD}\"}'"
-            fi
-            if [ -n "$TOKEN" ] && [ "$name" != "健康检查" ]; then
-              CURL_ARGS="$CURL_ARGS -H 'Authorization: Bearer $TOKEN'"
-            fi
-
-            # 执行请求
-            RESP=$(eval curl $CURL_ARGS "https://staging-api.xiaoxiajianji.com${path}" 2>&1)
-            HTTP_CODE=$(echo "$RESP" | awk '{print $1}')
-            TIME_TOTAL=$(echo "$RESP" | awk '{print $2}')
-            ELAPSED_MS=$(python3 -c "print(int(float('${TIME_TOTAL:-0}') * 1000))" 2>/dev/null || echo "0")
-
-            if [ "$HTTP_CODE" -ge 500 ] 2>/dev/null; then
-              FAIL=$((FAIL + 1))
-              FAIL_LIST="$FAIL_LIST\n  ❌ $name - HTTP $HTTP_CODE (${ELAPSED_MS}ms)"
-              echo "❌ $name - HTTP $HTTP_CODE - ${ELAPSED_MS}ms (FAIL)"
-            elif [ "$ELAPSED_MS" -ge "$fail_ms" ] 2>/dev/null; then
-              FAIL=$((FAIL + 1))
-              FAIL_LIST="$FAIL_LIST\n  ❌ $name - ${ELAPSED_MS}ms > ${fail_ms}ms"
-              echo "❌ $name - ${ELAPSED_MS}ms > ${fail_ms}ms (FAIL)"
-            elif [ "$ELAPSED_MS" -ge "$warn_ms" ] 2>/dev/null; then
-              WARN=$((WARN + 1))
-              WARN_LIST="$WARN_LIST\n  ⚠️  $name - ${ELAPSED_MS}ms > ${warn_ms}ms"
-              echo "⚠️  $name - ${ELAPSED_MS}ms (WARN, threshold: ${warn_ms}ms)"
-              PASS=$((PASS + 1))
-            else
-              PASS=$((PASS + 1))
-              echo "✅ $name - ${ELAPSED_MS}ms (OK, threshold: ${warn_ms}ms)"
-            fi
-          done
-
-          # 由于 while 在子 shell 中执行，用文件传递结果
-          # 重新跑一次用文件计数方式
-          echo ""
-          echo "--- 汇总性能数据 ---"
-
-          END_TIME=$(date +%s)
-          ELAPSED=$((END_TIME - START_TIME))
-
-          echo ""
-          echo "========== 性能基线巡检报告 =========="
-          echo "环境: https://staging-api.xiaoxiajianji.com"
-          echo "耗时: ${ELAPSED}s"
-          echo "======================================"
-
       - name: Generate performance report
         id: report
         shell: sh