v46.1-ui-mt76: Argon theme + hardened WG tunnel + Link Health dashboard

基于 v46 正式版(mt76)只恢复 UI 层:
- luci-theme-argon 2.4.3: local-background-wins 登录页 + bg1.jpg fallback
- luci-app-argon-config: 去 ui.changes.apply, ACL mutator 移 write
- luci-app-wgtunnel: rpcd ucode 后端(get/status/prepare/apply/rollback/reconnect),
  JSONMap 前端, 60s 一次性 token, 快照回滚, 无全局 network ACL
- luci-app-tr3000-status: 只读 rpcd ucode + 5s 轮询仪表盘
- tools/: audit_ui_packages.py + install_preview.sh + rollback_watchdog.sh
- docs/: 开发经历与翻车记录 + 固件哈希记录

固件本体(含烤入 WG 私钥/PSK)不入 git, 仅 K 盘保存.
kernel 成员与 v46 byte-identical; 尚未刷机.

immortalwrt-patches/feeds/luci/applications/luci-app-tr3000-status/Makefile

@@ -0,0 +1,11 @@
+include $(TOPDIR)/rules.mk
+
+LUCI_TITLE:=LuCI TR3000 Link Health dashboard
+LUCI_DEPENDS:=+rpcd-mod-ucode +ucode-mod-fs +ucode-mod-ubus +ucode-mod-uci +rpcd-mod-iwinfo +wireguard-tools +ip-full +nftables-json
+LUCI_PKGARCH:=all
+PKG_LICENSE:=GPL-3.0-only
+LUCI_MAINTAINER:=TR3000 v46.1 UI
+
+include $(TOPDIR)/feeds/luci/luci.mk
+
+# call BuildPackage - OpenWrt buildroot signature