refactor: 移除二维码和交叉编译，改为列出所有 LAN IP 地址；清理依赖

go.mod

@@ -9,7 +9,6 @@ require (
 	github.com/gofiber/contrib/v3/websocket v1.0.0
 	github.com/gofiber/fiber/v3 v3.1.0
 	github.com/google/uuid v1.6.0
-	github.com/mdp/qrterminal/v3 v3.2.1
 	golang.design/x/clipboard v0.7.1
 	gopkg.in/yaml.v3 v3.0.1
 )
@@ -55,7 +54,5 @@ require (
 	golang.org/x/mobile v0.0.0-20250606033058-a2a15c67f36f // indirect
 	golang.org/x/net v0.50.0 // indirect
 	golang.org/x/sys v0.41.0 // indirect
-	golang.org/x/term v0.40.0 // indirect
 	golang.org/x/text v0.34.0 // indirect
-	rsc.io/qr v0.2.0 // indirect
 )