feat(update): add rolling dev update channel for per-commit builds

Adds an opt-in Dev channel so panels running CI per-commit builds can self-update to the latest commit, mirroring the stable online-update flow.

CI publishes/overwrites a single fixed-tag pre-release (dev-latest), force-moved to the newest main commit and marked --latest=false so releases/latest stays the stable tag. Builds stamp the short commit via -ldflags; the panel compares the running commit to the dev release commit to detect an update, and update.sh honors XUI_UPDATE_TAG to install from that tag. Linux/systemd only.

internal/web/translation/ar-EG.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "إصدار البانل الحالي",
       "latestPanelVersion": "أحدث إصدار للبانل",
       "panelUpToDate": "البانل محدث لآخر إصدار",
+      "devChannel": "قناة التطوير",
+      "devChannelWarning": "تتابع نسخ التطوير كل كومِت على main وليست إصدارات مستقرة — لا يوجد رجوع تلقائي لإصدار أقدم.",
+      "currentCommit": "الكومِت الحالي",
+      "latestCommit": "أحدث كومِت",
+      "updateChannelChanged": "تم تغيير قناة التحديث",
       "upToDate": "محدث",
       "xrayStatusUnknown": "مش معروف",
       "xrayStatusRunning": "شغالة",

internal/web/translation/en-US.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Current panel version",
       "latestPanelVersion": "Latest panel version",
       "panelUpToDate": "Panel is up to date",
+      "devChannel": "Dev channel",
+      "devChannelWarning": "Dev builds track every commit on main and aren't stable releases — there is no automatic downgrade.",
+      "currentCommit": "Current commit",
+      "latestCommit": "Latest commit",
+      "updateChannelChanged": "Update channel changed",
       "upToDate": "Up to date",
       "xrayStatusUnknown": "Unknown",
       "xrayStatusRunning": "Running",

internal/web/translation/es-ES.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Versión actual del panel",
       "latestPanelVersion": "Última versión del panel",
       "panelUpToDate": "El panel está actualizado",
+      "devChannel": "Canal de desarrollo",
+      "devChannelWarning": "Las compilaciones de desarrollo siguen cada commit en main y no son versiones estables; no hay reversión automática.",
+      "currentCommit": "Commit actual",
+      "latestCommit": "Último commit",
+      "updateChannelChanged": "Canal de actualización cambiado",
       "upToDate": "Actualizado",
       "xrayStatusUnknown": "Desconocido",
       "xrayStatusRunning": "En ejecución",

internal/web/translation/fa-IR.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "نسخه فعلی پنل",
       "latestPanelVersion": "آخرین نسخه پنل",
       "panelUpToDate": "پنل به‌روز است",
+      "devChannel": "کانال توسعه (Dev)",
+      "devChannelWarning": "بیلدهای توسعه هر کامیت روی main را دنبال می‌کنند و نسخهٔ پایدار نیستند — بازگشت خودکار به نسخهٔ قبلی وجود ندارد.",
+      "currentCommit": "کامیت فعلی",
+      "latestCommit": "آخرین کامیت",
+      "updateChannelChanged": "کانال به‌روزرسانی تغییر کرد",
       "upToDate": "به‌روز",
       "xrayStatusUnknown": "ناشناخته",
       "xrayStatusRunning": "در حال اجرا",

internal/web/translation/id-ID.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Versi panel saat ini",
       "latestPanelVersion": "Versi panel terbaru",
       "panelUpToDate": "Panel sudah terbaru",
+      "devChannel": "Kanal dev",
+      "devChannelWarning": "Build dev mengikuti setiap commit di main dan bukan rilis stabil — tidak ada penurunan versi otomatis.",
+      "currentCommit": "Commit saat ini",
+      "latestCommit": "Commit terbaru",
+      "updateChannelChanged": "Kanal pembaruan diubah",
       "upToDate": "Terbaru",
       "xrayStatusUnknown": "Tidak diketahui",
       "xrayStatusRunning": "Berjalan",

internal/web/translation/ja-JP.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "現在のパネルバージョン",
       "latestPanelVersion": "最新のパネルバージョン",
       "panelUpToDate": "パネルは最新です",
+      "devChannel": "開発チャンネル",
+      "devChannelWarning": "開発ビルドは main の各コミットを追跡し、安定版ではありません。自動ダウングレードはありません。",
+      "currentCommit": "現在のコミット",
+      "latestCommit": "最新のコミット",
+      "updateChannelChanged": "更新チャンネルを変更しました",
       "upToDate": "最新",
       "xrayStatusUnknown": "不明",
       "xrayStatusRunning": "実行中",

internal/web/translation/pt-BR.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Versão atual do painel",
       "latestPanelVersion": "Última versão do painel",
       "panelUpToDate": "O painel está atualizado",
+      "devChannel": "Canal de desenvolvimento",
+      "devChannelWarning": "As builds de desenvolvimento acompanham cada commit na main e não são versões estáveis — não há downgrade automático.",
+      "currentCommit": "Commit atual",
+      "latestCommit": "Último commit",
+      "updateChannelChanged": "Canal de atualização alterado",
       "upToDate": "Atualizado",
       "xrayStatusUnknown": "Desconhecido",
       "xrayStatusRunning": "Em execução",

internal/web/translation/ru-RU.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Текущая версия панели",
       "latestPanelVersion": "Последняя версия панели",
       "panelUpToDate": "Панель обновлена",
+      "devChannel": "Канал разработки",
+      "devChannelWarning": "Сборки разработки отслеживают каждый коммит в main и не являются стабильными релизами — автоматического отката нет.",
+      "currentCommit": "Текущий коммит",
+      "latestCommit": "Последний коммит",
+      "updateChannelChanged": "Канал обновления изменён",
       "upToDate": "Обновлено",
       "xrayStatusUnknown": "Неизвестно",
       "xrayStatusRunning": "Запущен",

internal/web/translation/tr-TR.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Mevcut panel sürümü",
       "latestPanelVersion": "Panelin en son sürümü",
       "panelUpToDate": "Panel güncel",
+      "devChannel": "Geliştirme kanalı",
+      "devChannelWarning": "Geliştirme yapıları main üzerindeki her commit'i izler ve kararlı sürüm değildir — otomatik geri alma yoktur.",
+      "currentCommit": "Geçerli commit",
+      "latestCommit": "Son commit",
+      "updateChannelChanged": "Güncelleme kanalı değiştirildi",
       "upToDate": "Güncel",
       "xrayStatusUnknown": "Bilinmiyor",
       "xrayStatusRunning": "Çalışıyor",

internal/web/translation/uk-UA.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Поточна версія панелі",
       "latestPanelVersion": "Остання версія панелі",
       "panelUpToDate": "Панель оновлено",
+      "devChannel": "Канал розробки",
+      "devChannelWarning": "Збірки розробки відстежують кожен коміт у main і не є стабільними релізами — автоматичного відкату немає.",
+      "currentCommit": "Поточний коміт",
+      "latestCommit": "Останній коміт",
+      "updateChannelChanged": "Канал оновлення змінено",
       "upToDate": "Оновлено",
       "xrayStatusUnknown": "Невідомо",
       "xrayStatusRunning": "Запущено",

internal/web/translation/vi-VN.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "Phiên bản panel hiện tại",
       "latestPanelVersion": "Phiên bản panel mới nhất",
       "panelUpToDate": "Panel đã được cập nhật",
+      "devChannel": "Kênh phát triển",
+      "devChannelWarning": "Bản dev bám theo từng commit trên main và không phải bản ổn định — không có hạ cấp tự động.",
+      "currentCommit": "Commit hiện tại",
+      "latestCommit": "Commit mới nhất",
+      "updateChannelChanged": "Đã đổi kênh cập nhật",
       "upToDate": "Đã cập nhật",
       "xrayStatusUnknown": "Không xác định",
       "xrayStatusRunning": "Đang chạy",

internal/web/translation/zh-CN.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "当前面板版本",
       "latestPanelVersion": "最新面板版本",
       "panelUpToDate": "面板已是最新",
+      "devChannel": "开发通道",
+      "devChannelWarning": "开发版会跟踪 main 的每次提交，并非稳定版本，且无法自动降级。",
+      "currentCommit": "当前提交",
+      "latestCommit": "最新提交",
+      "updateChannelChanged": "更新通道已切换",
       "upToDate": "已是最新",
       "xrayStatusUnknown": "未知",
       "xrayStatusRunning": "运行中",

internal/web/translation/zh-TW.json

@@ -153,6 +153,11 @@
       "currentPanelVersion": "目前面板版本",
       "latestPanelVersion": "最新面板版本",
       "panelUpToDate": "面板已是最新",
+      "devChannel": "開發通道",
+      "devChannelWarning": "開發版會追蹤 main 的每次提交，並非穩定版本，且無法自動降級。",
+      "currentCommit": "目前提交",
+      "latestCommit": "最新提交",
+      "updateChannelChanged": "更新通道已切換",
       "upToDate": "已是最新",
       "xrayStatusUnknown": "未知",
       "xrayStatusRunning": "運行中",