feat: node info, build info and acrylic web theme

Squash of recent dev work: return_session login, backend switcher, line
detail timeline, overview strips, node platform/country/ISP info with flags
and icons, build info (version, tag, time) behind site.show_build, and the
acrylic display theme.

scripts/publish.sh

@@ -16,17 +16,23 @@ case "$project" in
   *) echo "unknown project: $project" >&2; exit 2 ;;
 esac
 
+# 构建信息（程序里显示的 tag、提交、构建时间）：没在 git 仓库里就留空
+export MONITOR_TAG="${MONITOR_TAG:-$(git -C "$root" describe --tags --always --dirty 2>/dev/null || true)}"
+export MONITOR_COMMIT="${MONITOR_COMMIT:-$(git -C "$root" rev-parse --short=10 HEAD 2>/dev/null || true)}"
+export MONITOR_BUILT_AT="${MONITOR_BUILT_AT:-$(date -u +%Y-%m-%dT%H:%M:%SZ)}"
+build_env=(-e MONITOR_TAG -e MONITOR_COMMIT -e MONITOR_BUILT_AT)
+
 out="backend/artifacts/publish/$project/$rid"
 args=(publish "$csproj" -c Release -r "$rid" -p:PublishAot=true -p:DebugType=none -p:DebugSymbols=false -o "/src/$out" --artifacts-path /artifacts -nologo -v q)
 
 case "$rid" in
   linux-musl-x64)
     # SDK 镜像的版本可以比 global.json 新（rollForward = latestFeature）
-    docker run --rm -v "$root:/src" -v monitor-nuget:/root/.nuget -v "monitor-artifacts-$rid:/artifacts" -w /src \
+    docker run --rm "${build_env[@]}" -v "$root:/src" -v monitor-nuget:/root/.nuget -v "monitor-artifacts-$rid:/artifacts" -w /src \
       mcr.microsoft.com/dotnet/sdk:10.0-alpine-aot dotnet "${args[@]}"
     ;;
   linux-x64)
-    docker run --rm -v "$root:/src" -v monitor-nuget:/root/.nuget -v "monitor-artifacts-$rid:/artifacts" -w /src       mcr.microsoft.com/dotnet/sdk:10.0-noble-aot dotnet "${args[@]}"
+    docker run --rm "${build_env[@]}" -v "$root:/src" -v monitor-nuget:/root/.nuget -v "monitor-artifacts-$rid:/artifacts" -w /src       mcr.microsoft.com/dotnet/sdk:10.0-noble-aot dotnet "${args[@]}"
     ;;
   linux-musl-arm64|linux-arm64)
     echo "$rid needs an arm64 Alpine builder (native or qemu): run this script on an arm64 host or in CI" >&2