Ship 0.8 fog/freistellen and fix Windows CI for friends

Publish the portable zip to public Forgejo from the private GitHub
builder, and force Ninja so MSVC 195 deps build without CMake 4.2.

linuxinstall/bundle-rembg.sh

@@ -0,0 +1,27 @@
+#!/usr/bin/env bash
+# Place rembg CLI + models next to an InfiniPaint install so Schnell/Allgemein
+# work without a global PATH dependency. Missing tools are skipped; the UI greys out.
+set -euo pipefail
+DEST="${1:?usage: bundle-rembg.sh DEST_DIR}"
+mkdir -p "$DEST"
+
+TOWER="${TOWER_REMBG_VENV:-$HOME/.local/share/tower-rembg}"
+MODELS_SRC="${REMBG_HOME:-$HOME/.rembg}"
+
+if [[ -x "$TOWER/bin/rembg" ]]; then
+  ln -sfn "$TOWER" "$DEST/rembg"
+  echo "Linked rembg CLI: $DEST/rembg -> $TOWER"
+elif [[ -x "$TOWER/Scripts/rembg.exe" ]]; then
+  ln -sfn "$TOWER" "$DEST/rembg"
+  echo "Linked rembg CLI: $DEST/rembg -> $TOWER"
+else
+  echo "No tower-rembg venv at $TOWER — Schnell/Allgemein will be unavailable unless rembg is on PATH."
+fi
+
+if [[ -d "$MODELS_SRC/models" ]]; then
+  mkdir -p "$DEST/rembg-home"
+  ln -sfn "$MODELS_SRC/models" "$DEST/rembg-home/models"
+  echo "Linked rembg models: $DEST/rembg-home/models -> $MODELS_SRC/models"
+else
+  echo "No rembg models at $MODELS_SRC/models — download with: rembg d silueta && rembg d bria-rmbg"
+fi

linuxinstall/install-local.sh

@@ -14,6 +14,11 @@ rm -rf "${APPDIR}/data"
 cp -a "${ROOT}/assets/data" "${APPDIR}/data"
 ln -sfn "${APPDIR}/infinipaint" "${PREFIX}/bin/infinipaint"
 
+# Optional rembg next to the app (silueta / bria). Missing = greyed-out modes in Settings.
+if [[ -x "${ROOT}/linuxinstall/bundle-rembg.sh" ]]; then
+  bash "${ROOT}/linuxinstall/bundle-rembg.sh" "$APPDIR" || true
+fi
+
 cat > "${PREFIX}/share/applications/com.infinipaint.infinipaint-fork.desktop" <<EOF
 [Desktop Entry]
 Name=InfiniPaint (fork)