feat: 优化监控仪表盘 UI

- 添加 appbar 导航栏，支持 Chart/Queues 视图切换
- appbar 切换使用 history API，支持浏览器前进/后退
- 图表视图占满整个可视区域
- queue-modal 共享 appbar 样式
- 修复 queue tab count 字段名大小写问题
- tooltip 跟随鼠标显示在右下方，移除箭头
- 图表 canvas 鼠标样式改为准星
- pause/resume 队列后刷新列表
- example 添加 flag 配置参数

go.mod

@@ -4,18 +4,28 @@ go 1.25.4
 
 require (
 	github.com/hibiken/asynq v0.25.1
+	github.com/prometheus/client_golang v1.23.2
 	github.com/redis/go-redis/v9 v9.7.0
 	github.com/rs/xid v1.6.0
 )
 
 require (
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.66.1 // indirect
+	github.com/prometheus/procfs v0.16.1 // indirect
+	go.yaml.in/yaml/v2 v2.4.2 // indirect
+)
+
+require (
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/mattn/go-sqlite3 v1.14.32
 	github.com/robfig/cron/v3 v3.0.1 // indirect
 	github.com/spf13/cast v1.7.0 // indirect
-	golang.org/x/sys v0.27.0 // indirect
+	golang.org/x/sys v0.35.0 // indirect
 	golang.org/x/time v0.8.0 // indirect
-	google.golang.org/protobuf v1.35.2 // indirect
+	google.golang.org/protobuf v1.36.8 // indirect
 )