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/tests/verify_immutable.sh

@@ -0,0 +1,31 @@
+#!/usr/bin/env bash
+# Verify the immutable v46 network surface is unchanged after the plugin
+# preview install. Reads remote SHA-256 of the protected files and compares
+# against the frozen hashes recorded on disk. Strictly read-only.
+
+set -euo pipefail
+
+ROUTER="${ROUTER:-root@192.168.1.2}"
+HASH_FILE="${HASH_FILE:?usage: verify_immutable.sh /path/to/hashes.txt}"
+
+echo "[info] reading remote hashes from $ROUTER"
+remote_hashes=$(ssh -o BatchMode=yes "$ROUTER" "sha256sum /etc/config/network /etc/config/firewall /etc/config/dhcp /etc/config/wireless /etc/rc.local /etc/hotplug.d/iface/20-vxlan /etc/hotplug.d/iface/30-mss-clamp /usr/share/nftables.d/chain-pre/mangle_forward/30-mss-clamp.nft 2>/dev/null" | sort)
+
+echo "[info] comparing against $HASH_FILE"
+while read -r expected_hash rest; do
+  [ -z "$expected_hash" ] && continue
+  remote_line=$(echo "$remote_hashes" | awk -v want="$rest" '$2 == want {print}')
+  if [ -z "$remote_line" ]; then
+    echo "MISSING: $rest"
+    exit 1
+  fi
+  if [ "${remote_line%% *}" != "$expected_hash" ]; then
+    echo "DRIFT: $rest"
+    echo "  expected $expected_hash"
+    echo "  got      ${remote_line%% *}"
+    exit 1
+  fi
+  echo "OK: $rest"
+done < "$HASH_FILE"
+
+echo "[ok] all immutable files match frozen hashes"