Add autostart status and release builds

scripts/build-release-linux.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Build all release artifacts from a Linux host or CI runner. The Docker image
+# contains Linux/Fyne dependencies for amd64 and arm64, plus the MinGW
+# cross-compiler used for the Windows GUI executable.
+tag="gitea.mixdep.ru/mix/pysentry-builder"
+
+docker build -f Dockerfile -t "$tag" .
+
+container_id="$(docker create "$tag")"
+cleanup() {
+    docker rm "$container_id" >/dev/null
+}
+trap cleanup EXIT
+
+mkdir -p dist/linux dist/windows
+docker cp "${container_id}:/out/linux/." dist/linux
+docker cp "${container_id}:/out/windows/." dist/windows
+
+echo "Built release artifacts:"
+find dist/linux dist/windows -maxdepth 1 -type f -print