Add multi-theme system with random theme selection on app startup

src-tauri/tauri.conf.json

@@ -0,0 +1,36 @@
+{
+  "$schema": "https://schema.tauri.app/config/2",
+  "productName": "countdown",
+  "version": "0.1.0",
+  "identifier": "com.countdown.app",
+  "build": {
+    "beforeDevCommand": "pnpm dev",
+    "devUrl": "http://localhost:1420",
+    "beforeBuildCommand": "pnpm build",
+    "frontendDist": "../dist"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "countdown",
+        "width": 800,
+        "height": 600
+      }
+    ],
+    "security": {
+      "csp": "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'"
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": ["deb", "rpm", "appimage", "nsis", "msi", "dmg", "app"],
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ]
+  }
+}