Add channel health diagnostics and gateway recovery fixes (#855)

src/i18n/locales/zh/channels.json

@@ -62,6 +62,7 @@
         "connectionStatus": {
             "connected": "已连接",
             "connecting": "连接中",
+            "degraded": "异常降级",
             "disconnected": "未连接",
             "error": "异常"
         },
@@ -99,6 +100,30 @@
         "saveAndConnect": "保存并连接",
         "envVar": "环境变量: {{var}}"
     },
+    "health": {
+        "state": {
+            "degraded": "网关状态异常",
+            "unresponsive": "网关无响应"
+        },
+        "reasons": {
+            "gateway_degraded": "网关心跳近期出现异常。",
+            "gateway_unresponsive": "网关控制面看起来已经无响应。",
+            "channels_status_timeout": "频道运行时状态探测超时。",
+            "rpc_timeout": "最近的网关 RPC 调用发生超时。",
+            "gateway_not_running": "网关当前未运行。",
+            "gateway_error": "网关当前处于错误状态。",
+            "runtime_error": "频道运行时返回了错误。"
+        },
+        "restartGateway": "重启网关",
+        "copyDiagnostics": "复制诊断快照",
+        "viewDiagnostics": "查看诊断快照",
+        "hideDiagnostics": "隐藏诊断快照",
+        "diagnosticsTitle": "网关诊断快照",
+        "diagnosticsCopied": "诊断快照已复制到剪贴板",
+        "diagnosticsCopyFailed": "收集诊断快照失败：{{error}}",
+        "restartTriggered": "已请求重启网关",
+        "restartFailed": "重启网关失败：{{error}}"
+    },
     "meta": {
         "telegram": {
             "description": "使用 @BotFather 提供的机器人令牌连接 Telegram",