feat(web): 新增导航组合式函数，更新应用外壳组合式函数，增强前端路由和状态管理

web/src/composables/useAppShell.js

@@ -124,6 +124,7 @@ export function useAppShell() {
   })
 
   const detailMode = computed(() => route.name === 'app-request-detail')
+  const logDetailMode = computed(() => route.name === 'app-log-detail')
   const detailAlerts = computed(() => (detailMode.value ? buildDetailAlerts(selectedRequest.value) : []))
 
   const topBarView = computed(() => {
@@ -134,6 +135,13 @@ export function useAppShell() {
       }
     }
 
+    if (logDetailMode.value) {
+      return {
+        title: '日志详情',
+        desc: '查看单条日志的解析结果、上下文信息与原始记录。'
+      }
+    }
+
     return currentView.value
   })
 
@@ -270,6 +278,7 @@ export function useAppShell() {
     currentView,
     customRange,
     detailMode,
+    logDetailMode,
     filteredRequests,
     filters,
     handleApprove,