feat: expand multiplayer, chat, and release support

- add network NPC synchronization and dialogue interactions
- add world bulletin publishing and display
- improve authentication, session refresh, and appearance sync
- synchronize player direction and movement animations
- improve input focus and progressive Web loading
- add macOS/Windows builds and deployment configuration
- include required fonts, shaders, and runtime assets

scripts/build_desktop.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+PROJECT_DIR="$(cd "$SCRIPT_DIR/.." && pwd)"
+GODOT_BIN="${GODOT_BIN:-/Applications/Godot.app/Contents/MacOS/Godot}"
+TARGET="${1:-all}"
+VERSION="${WHALETOWN_VERSION:-1.0.0}"
+
+if [[ ! -x "$GODOT_BIN" ]]; then
+  echo "Godot executable not found: $GODOT_BIN" >&2
+  echo "Set GODOT_BIN to the Godot 4.6.2 executable path." >&2
+  exit 1
+fi
+
+export_target() {
+  local preset="$1"
+  local output="$2"
+  local marker
+  marker="$(mktemp /tmp/whaletown-export.XXXXXX)"
+  mkdir -p "$(dirname "$output")"
+  echo "Exporting $preset -> $output"
+  "$GODOT_BIN" --headless --path "$PROJECT_DIR" --export-release "$preset" "$output"
+  if [[ ! -e "$output" ]] || [[ -z "$(find "$output" -newer "$marker" -print -quit 2>/dev/null)" ]]; then
+    echo "Export failed: Godot did not create a fresh artifact at $output" >&2
+    exit 1
+  fi
+}
+
+package_artifacts() {
+  local release_dir="$PROJECT_DIR/build/desktop/release"
+  local mac_app="$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
+  local windows_exe="$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
+  local mac_zip="$release_dir/WhaleTown-macOS-$VERSION.zip"
+  local windows_zip="$release_dir/WhaleTown-Windows-x86_64-$VERSION.zip"
+
+  if [[ ! -d "$mac_app" ]] || [[ ! -f "$windows_exe" ]]; then
+    echo "Both macOS and Windows artifacts are required before packaging." >&2
+    exit 1
+  fi
+
+  mkdir -p "$release_dir"
+  echo "Packaging $mac_zip"
+  /usr/bin/ditto -c -k --sequesterRsrc --keepParent "$mac_app" "$mac_zip"
+  echo "Packaging $windows_zip"
+  /usr/bin/ditto -c -k --keepParent "$windows_exe" "$windows_zip"
+  (
+    cd "$release_dir"
+    shasum -a 256 "$(basename "$mac_zip")" "$(basename "$windows_zip")" > SHA256SUMS.txt
+  )
+  echo "Release packages are under: $release_dir"
+}
+
+case "$TARGET" in
+  macos)
+    export_target "WhaleTown macOS" "$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
+    ;;
+  windows)
+    export_target "WhaleTown Windows" "$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
+    ;;
+  all)
+    export_target "WhaleTown macOS" "$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
+    export_target "WhaleTown Windows" "$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
+    ;;
+  package)
+    package_artifacts
+    ;;
+  release)
+    export_target "WhaleTown macOS" "$PROJECT_DIR/build/desktop/macos/WhaleTown.app"
+    export_target "WhaleTown Windows" "$PROJECT_DIR/build/desktop/windows/WhaleTown.exe"
+    package_artifacts
+    ;;
+  *)
+    echo "Usage: $0 [macos|windows|all|package|release]" >&2
+    exit 2
+    ;;
+esac
+
+echo "Desktop export complete. Files are under: $PROJECT_DIR/build/desktop"