feat: integrate Electron for desktop application support

- Added Electron entry point in `electron/main.js` to run the Express server in-process and open the main application window.
- Updated `package.json` to include Electron dependencies and scripts for building and running the application.
- Refactored server startup logic into `server/start.js` for better modularity and to support both CLI and Electron usage.
- Implemented environment variable handling for database and image paths to accommodate Electron's packaging.
- Created a script `server/scripts/promote-morphix.js` to merge admin and morphix accounts into a single user.
- Adjusted image root path resolution in `server/media/images.js` to allow for environment variable overrides.
- Cleaned up `server/index.js` to delegate server initialization to the new `startServer` function.

package.json

@@ -4,6 +4,7 @@
     "private": true,
     "type": "module",
     "description": "Touchscreen kiosk + admin for exploring and playing internet radio.",
+    "main": "electron/main.js",
     "scripts": {
         "dev": "concurrently -k -n web,api -c blue,green \"npm:dev:web\" \"npm:dev:api\"",
         "dev:web": "vite",
@@ -11,7 +12,13 @@
         "build": "vite build",
         "start": "node server/index.js",
         "seed": "node server/scripts/seed.js",
-        "images:fetch": "node server/scripts/download-images.js"
+        "images:fetch": "node server/scripts/download-images.js",
+        "electron": "electron .",
+        "electron:dev": "npm run build && electron .",
+        "postinstall": "electron-builder install-app-deps",
+        "dist": "npm run build && electron-builder",
+        "dist:win": "npm run build && electron-builder --win",
+        "dist:linux": "npm run build && electron-builder --linux"
     },
     "dependencies": {
         "bcryptjs": "^2.4.3",
@@ -24,7 +31,46 @@
     },
     "devDependencies": {
         "concurrently": "^9.0.1",
+        "electron": "^32.3.3",
+        "electron-builder": "^25.1.8",
         "hls.js": "^1.5.17",
         "vite": "^5.4.8"
+    },
+    "build": {
+        "appId": "nl.oradio.app",
+        "productName": "Online Radio Explorer",
+        "asar": true,
+        "asarUnpack": [
+            "node_modules/better-sqlite3/**"
+        ],
+        "files": [
+            "electron/**",
+            "server/**",
+            "!server/scripts/**",
+            "data/seed/**",
+            "package.json"
+        ],
+        "directories": {
+            "output": "dist-electron",
+            "buildResources": "build"
+        },
+        "win": {
+            "target": [
+                "nsis"
+            ]
+        },
+        "linux": {
+            "target": [
+                {
+                    "target": "AppImage",
+                    "arch": [
+                        "x64",
+                        "arm64",
+                        "armv7l"
+                    ]
+                }
+            ],
+            "category": "AudioVideo"
+        }
     }
-}
+}