feat(gui): dockerized Windows cross-build (win-builder image + one-shot dist script) + GUI/backend scenario docs

cmd/gui/scripts/dist-win-docker.sh

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+#!/usr/bin/env bash
+# One-shot Windows release build for the GUI:
+#   1) cross-compile the embedded core in docker (llmsproxy.exe + lua51.dll)
+#   2) host-side electron-builder NSIS packaging (wine required on host)
+# Outputs: cmd/build/gui-dist/"ModelRouter Setup <version>.exe"
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"
+cd "$ROOT/cmd/gui"
+
+# 1) core (docker)
+"$ROOT/cmd/gui/scripts/win-core-docker.sh"
+
+# 2) packaging (host, needs wine for electron-builder's signtool/nsis)
+command -v wine >/dev/null || { echo "wine required on host for NSIS packaging"; exit 1; }
+if ! command -v npx >/dev/null; then echo "node/npm required"; exit 1; fi
+
+echo "[dist-win] electron-builder --win nsis ..."
+# bin artifacts already refreshed by win-core-docker.sh; skip the prepare step
+npx electron-builder --win nsis
+
+ls -la "$ROOT/cmd/build/gui-dist/"*.exe 2>/dev/null
+echo "[dist-win] done"

cmd/gui/scripts/win-core-docker.sh

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+#!/usr/bin/env bash
+# Build embedded Windows core inside the self-sufficient builder image.
+#   - image has LuaJIT pre-built: /opt/luajit2/src/{lua51.dll, libluajit-5.1.dll.a}
+#   - import lib already installed at image build (libluajit-5.1.a, mingw lib dir)
+# Outputs: cmd/gui/bin/{llmsproxy.exe, lua51.dll}
+set -euo pipefail
+
+ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/../../.." && pwd)"
+BIN_DIR="$ROOT/cmd/gui/bin"
+IMAGE="${WIN_BUILDER_IMAGE:-modelrouter/win-builder}"
+PROXY="${GOPROXY:-https://goproxy.cn,direct}"
+
+command -v docker >/dev/null || {
+  echo "docker required"
+  exit 1
+}
+
+if ! docker image inspect "$IMAGE" >/dev/null 2>&1; then
+  echo "[win-core] building image $IMAGE ..."
+  docker build -t "$IMAGE" "$ROOT/cmd/gui/docker/win-builder"
+fi
+
+mkdir -p "$BIN_DIR"
+
+echo "[win-core] cross-building llmsproxy.exe (windows/amd64, luajit) + lua51.dll ..."
+docker run --rm \
+  -v "$ROOT":/workspace \
+  -e GOPROXY="$PROXY" \
+  -w /workspace \
+  "$IMAGE" bash -c '
+    set -euo pipefail
+    cp /opt/luajit2/src/lua51.dll /workspace/cmd/gui/bin/lua51.dll
+    GOOS=windows GOARCH=amd64 CGO_ENABLED=1 CC=x86_64-w64-mingw32-gcc \
+      go build -buildvcs=false -tags luajit -trimpath \
+      -o /workspace/cmd/gui/bin/llmsproxy.exe ./cmd/llmsproxy
+    echo "  -> core built"
+  '
+echo "[win-core] done: $BIN_DIR/llmsproxy.exe"