feat: Arch Linux packaging with Electron frontend, systemd backend service, and Windows exe build

- Add Electron wrapper (main.cjs, preload.cjs) for desktop frontend
- Add systemd service unit, env config, and sysusers for backend API
- Add PKGBUILD and .install for Arch package (makepkg -si)
- Add desktop entry, SVG/PNG icon, and wrapper scripts
- Add bin/build-pkg, bin/install-pkg, bin/windows-pkg scripts
- Make API port configurable via PORT env var (default 3000, prod 18390)
- Add electron-builder config for Windows exe cross-compilation
- Set vite base to './' for Electron file:// loading

1 files changed, 31 insertions, 0 deletions

diff --git a/packaging/dispatch-api.conf b/packaging/dispatch-api.conf
new file mode 100644
index 0000000..9824e16
--- /dev/null
+++ b/packaging/dispatch-api.conf
@@ -0,0 +1,31 @@
+# /etc/dispatch/dispatch-api.conf
+# Environment configuration for the Dispatch API service.
+# This file is sourced by systemd (via EnvironmentFile=) and by the
+# dispatch-api-wrapper.sh script for manual invocation.
+#
+# Lines beginning with '#' are comments and are ignored.
+# Syntax: KEY=value  (no spaces around '=', no 'export' keyword needed for systemd)
+
+# ---------------------------------------------------------------------------
+# LLM / AI provider
+# ---------------------------------------------------------------------------
+
+# API key used by the backend to call the OpenCode (or compatible) LLM API.
+OPENCODE_API_KEY=
+
+# ---------------------------------------------------------------------------
+# Runtime environment
+# ---------------------------------------------------------------------------
+
+# Set to "production" for live deployments.
+NODE_ENV=production
+
+# ---------------------------------------------------------------------------
+# Server
+# ---------------------------------------------------------------------------
+
+# Port the API listens on (default: 3000).
+PORT=18390
+
+# Hostname/address to bind to (default: 0.0.0.0).
+# HOST=0.0.0.0