test(i18n,sub): clear the three standing vitest reds (item 10)

- i18n dead keys: drop 13 keys with no reference left (pages.xray.routeTester*
  from the P9 feature removal, tgbot.online superseded by tgbot.messages.online,
  tgbot.commands.restartSuccess/restartFailed from the rewritten restart handler)
- i18n key sets: add the P9 forwarding block (20 keys) to the 11 locales that
  missed it, as English placeholders per repo convention; all 13 locales now
  carry identical key sets
- subscription port test: the case predated P7 — clearing the port field is the
  explicit subPort 0 (no port in generated links) opt-in via onNumber onClear,
  so assert updateSetting is called with { subPort: 0 } instead of never called

No component code, UI behavior, or styles touched.

internal/web/translation/zh-TW.json

@@ -282,6 +282,28 @@
       "streamTab": "傳輸",
       "securityTab": "安全",
       "sniffingTab": "嗅探",
+      "forwardingTab": "Forwarding",
+      "forwarding": {
+        "mode": "Forwarding",
+        "direct": "Direct",
+        "forward": "Forward (entry → exit)",
+        "landing": "Landing",
+        "managed": "Managed landing",
+        "manual": "Manual endpoint",
+        "target": "Landing inbound",
+        "targetPlaceholder": "Pick a SOCKS (mixed) inbound",
+        "targetDisabled": "disabled",
+        "address": "Landing address",
+        "port": "Exit port",
+        "protocol": "Entry → exit protocol",
+        "username": "SOCKS5 username",
+        "password": "Landing password",
+        "importLink": "Import from link",
+        "importPlaceholder": "socks5://user:pass@host:port",
+        "importApply": "Import",
+        "importFailed": "Could not parse that link",
+        "help": "Applies when this inbound is deployed to an agent node: on every config pull the panel compiles this forwarding into a dedicated outbound plus a routing rule for that agent. A managed landing's address and credentials are resolved from the chosen inbound at build time."
+      },
       "sniffingMetadataOnly": "僅中繼資料",
       "sniffingRouteOnly": "僅路由",
       "sniffingIpsExcluded": "排除的 IP",
@@ -1251,16 +1273,6 @@
       "Balancers": "負載均衡",
       "balancerTagRequired": "標籤為必填",
       "balancerSelectorRequired": "至少選擇一個出站",
-      "routeTester": "路由測試",
-      "routeTesterDesc": "向執行中的 Xray 查詢某個連線將使用哪個出站。不會傳送真實流量 — 結果直接來自即時路由引擎。",
-      "routeTesterDest": "網域或 IP",
-      "routeTesterPort": "埠號",
-      "routeTesterInbound": "入站",
-      "routeTesterProtocol": "嗅探協議",
-      "routeTesterTest": "測試路由",
-      "routeTesterMatchedOutbound": "匹配出站",
-      "routeTesterViaBalancer": "經由負載均衡器",
-      "routeTesterDefaultOutbound": "無路由規則匹配 — 流量將導向預設（第一個）出站。",
       "Routings": "路由規則",
       "logLevel": "日誌級別",
       "logLevelDesc": "錯誤日誌的日誌級別，用於指示需要記錄的資訊",
@@ -1717,7 +1729,6 @@
     "inbounds": "入站",
     "clients": "客戶端",
     "offline": "🔴 離線",
-    "online": "🟢 上線",
     "commands": {
       "unknown": "❗ 未知命令",
       "pleaseChoose": "👇 請選擇：\r\n",
@@ -1730,8 +1741,6 @@
       "helpAdminCommands": "要重新啟動 Xray Core：\r\n<code>/restart</code>\r\n\r\n要搜尋客戶電子郵件：\r\n<code>/usage [電子郵件]</code>\r\n\r\n要搜尋入站（帶有客戶統計資料）：\r\n<code>/inbound [備註]</code>\r\n\r\nTelegram 聊天 ID：\r\n<code>/id</code>",
       "helpClientCommands": "要搜尋統計資料，請使用以下命令：\r\n<code>/usage [電子郵件]</code>\r\n\r\nTelegram 聊天 ID：\r\n<code>/id</code>",
       "restartUsage": "\r\n\r\n<code>/restart</code>",
-      "restartSuccess": "✅ 操作成功!",
-      "restartFailed": "❗ 操作錯誤。\r\n\r\n<code>錯誤: {{ .Error }}</code>.",
       "xrayNotRunning": "❗ Xray Core 未運行。",
       "startDesc": "顯示主選單",
       "helpDesc": "機器人幫助",