请求明细支持查看原始请求/响应：OT_PROXY_LOG_RAW 开关控制，仅管理员记录与可见，流式全量捕获

- 配置: ProxyConfig.LogRaw (OT_PROXY_LOG_RAW, 默认 false)
- 存储: usage_logs 新增 raw_request/raw_response 文本列 (AutoMigrate)
- 网关: NewGateway 接收 logRaw 参数
- handlers: 三个协议入口按 开关+管理员 条件记录原始请求体
- passthrough: 非流式 copyAndCapture 捕获响应, 流式 streamCopy 累积全部原始 SSE 行, finishUsage 统一写入
- admin API: AdminUsage 返回 raw_request/raw_response (仅管理员)
- 前端: 用量页新增查看入口, 弹窗 tab 切换请求/响应
- gitignore: 修正 server/web/ 忽略规则（尾随空格导致未生效）

web/src/views/admin/UsageView.vue

@@ -6,6 +6,7 @@ import { protocolShort } from '@/lib/protocol'
 import { fmtCost, fmtTime } from '@/lib/format'
 import Badge from '@/components/ui/Badge.vue'
 import Button from '@/components/ui/Button.vue'
+import Modal from '@/components/ui/Modal.vue'
 import type { UsageLog } from '@/types'
 
 const toast = useToastStore()
@@ -15,6 +16,14 @@ const page = ref(1)
 const modelFilter = ref('')
 const pageSize = 15
 
+const viewing = ref<UsageLog | null>(null)
+const viewTab = ref<'request' | 'response'>('request')
+
+function openRaw(l: UsageLog) {
+  viewing.value = l
+  viewTab.value = 'request'
+}
+
 async function load() {
   try {
     const { data } = await http.get(
@@ -77,6 +86,7 @@ onMounted(load)
             <span class="mono-num">{{ l.input_tokens }}/{{ l.output_tokens }} tok</span>
             <span class="mono-num">{{ l.latency_ms }}ms</span>
             <span class="mono-num w-full">{{ fmtTime(l.created_at) }}</span>
+            <Button v-if="l.raw_request" size="sm" variant="ghost" class="ml-auto" @click="openRaw(l)">查看原始</Button>
           </div>
         </div>
         <p v-if="logs.length === 0" class="card px-4 py-8 text-center text-sm text-muted">暂无请求记录</p>
@@ -95,6 +105,7 @@ onMounted(load)
               <th scope="col" class="px-4 py-2.5 font-medium">耗时</th>
               <th scope="col" class="px-4 py-2.5 font-medium">状态</th>
               <th scope="col" class="px-4 py-2.5 font-medium">时间</th>
+              <th scope="col" class="px-4 py-2.5 font-medium">原始</th>
             </tr>
           </thead>
           <tbody>
@@ -109,9 +120,13 @@ onMounted(load)
                 <Badge :variant="l.status === 'success' ? 'ok' : l.status === 'canceled' ? 'neutral' : 'err'">{{ l.status }}</Badge>
               </td>
               <td class="px-4 py-2.5 font-mono text-xs text-muted">{{ fmtTime(l.created_at) }}</td>
+              <td class="px-4 py-2.5">
+                <Button v-if="l.raw_request" size="sm" variant="ghost" @click="openRaw(l)">查看</Button>
+                <span v-else class="text-xs text-muted">-</span>
+              </td>
             </tr>
             <tr v-if="logs.length === 0">
-              <td colspan="8" class="px-4 py-10 text-center text-sm text-muted">暂无请求记录</td>
+              <td colspan="9" class="px-4 py-10 text-center text-sm text-muted">暂无请求记录</td>
             </tr>
           </tbody>
         </table>
@@ -124,5 +139,42 @@ onMounted(load)
         </div>
       </div>
     </div>
+
+    <Modal :open="!!viewing" title="原始请求与响应" width="max-w-3xl" @close="viewing = null">
+      <div v-if="viewing" class="space-y-3">
+        <div class="flex flex-wrap items-center justify-between gap-2">
+          <div class="text-xs text-muted">
+            <span class="font-mono text-ink">{{ viewing.model }}</span>
+            <span class="mx-1.5">·</span>
+            <span class="font-mono">{{ viewing.user || '-' }}</span>
+            <span class="mx-1.5">·</span>
+            <span class="mono-num">{{ fmtTime(viewing.created_at) }}</span>
+          </div>
+          <div class="flex gap-1 rounded-md border border-edge p-0.5">
+            <button
+              class="rounded px-2.5 py-1 text-xs transition"
+              :class="viewTab === 'request' ? 'bg-surface2 text-ink' : 'text-muted'"
+              @click="viewTab = 'request'"
+            >
+              请求
+            </button>
+            <button
+              class="rounded px-2.5 py-1 text-xs transition"
+              :class="viewTab === 'response' ? 'bg-surface2 text-ink' : 'text-muted'"
+              @click="viewTab = 'response'"
+            >
+              响应
+            </button>
+          </div>
+        </div>
+        <pre
+          v-if="viewTab === 'request' ? viewing.raw_request : viewing.raw_response"
+          class="max-h-[60vh] overflow-auto rounded-md border border-edge bg-surface p-3 font-mono text-xs leading-relaxed text-ink whitespace-pre-wrap break-all"
+        >{{ viewTab === 'request' ? viewing.raw_request : viewing.raw_response }}</pre>
+        <p v-else class="rounded-md border border-edge bg-surface p-4 text-center text-xs text-muted">
+          该请求未记录{{ viewTab === 'request' ? '原始请求' : '原始响应' }}
+        </p>
+      </div>
+    </Modal>
   </div>
 </template>