feat(version): 第18条 显示版本与内部版本解耦（V/A 双系）

- config 新增 displayVersion 注入变量（默认 1.0.0）：GetDisplayVersion/
  GetMasterDisplayVersion(V)/GetAgentDisplayVersion(A)，以后升版只改注入值
- ParseDisplayVersion/CompareDisplayVersion：三段数值比较，个位进位规则
  (1.0.9<1.1.0) 天然成立；不可解析（dev 标签/3.7.0-agent.1）返回 ok=false
- 显示位切换：dist 注入 X_UI_CUR_VER、-v、TG 报告 → V 系；
  agent 遥测 agentVersion → A 系；节点行 A 系原样显示、老 agent 沿用
  "agent " 前缀兼容
- 内部流不动：GetBaseVersion/GetPanelVersion 及其比较/订阅/远端状态
  消费方保持原样，传统节点更新判定与徽标行为不变

internal/web/service/node_contract.go

@@ -3,6 +3,7 @@ package service
 import (
 	"strings"
 
+	"github.com/mhsanaei/3x-ui/v3/internal/config"
 	"github.com/mhsanaei/3x-ui/v3/internal/database"
 	"github.com/mhsanaei/3x-ui/v3/internal/database/model"
 	"github.com/mhsanaei/3x-ui/v3/internal/util/common"
@@ -199,7 +200,14 @@ func annotateAgentTelemetry(views []*NodeView) {
 			v.XrayVersion = ag.XrayVersion
 		}
 		if ag.AgentVersion != "" {
-			v.PanelVersion = "agent " + ag.AgentVersion
+			// New agents report the A-series display version, shown
+			// verbatim; older agents report the internal build version
+			// and keep the historical "agent " prefix.
+			if _, ok := config.ParseDisplayVersion(ag.AgentVersion); ok && strings.HasPrefix(ag.AgentVersion, "A") {
+				v.PanelVersion = ag.AgentVersion
+			} else {
+				v.PanelVersion = "agent " + ag.AgentVersion
+			}
 		}
 		v.UptimeSecs = ag.UptimeSecs
 		v.LatencyMs = ag.LatencyMs

internal/web/service/tgbot/tgbot_report.go

@@ -112,7 +112,7 @@ func (t *Tgbot) prepareServerUsageInfo() string {
 	onlines := t.inboundService.GetOnlineClients()
 
 	info += t.I18nBot("tgbot.messages.hostname", "Hostname=="+hostname)
-	info += t.I18nBot("tgbot.messages.version", "Version=="+config.GetPanelVersion())
+	info += t.I18nBot("tgbot.messages.version", "Version=="+config.GetMasterDisplayVersion())
 	info += t.I18nBot("tgbot.messages.xrayVersion", "XrayVersion=="+fmt.Sprint(t.lastStatus.Xray.Version))
 
 	// get ip address