Initial scaffold: Sinatra map app with Tauri desktop shell

Sinatra backend serving a basic Leaflet map, wrapped in a Tauri
desktop shell that starts the same server in a native window.

src-tauri/tauri.conf.json

@@ -0,0 +1,45 @@
+{
+  "$schema": "https://schema.tauri.app/config/2",
+  "productName": "MapTool",
+  "version": "0.1.0",
+  "identifier": "net.priesol.maptool",
+  "build": {
+    "beforeDevCommand": "bundle exec puma -C ../config/puma.rb",
+    "devUrl": "http://127.0.0.1:4567",
+    "frontendDist": "http://127.0.0.1:4567"
+  },
+  "app": {
+    "windows": [
+      {
+        "title": "MapTool",
+        "width": 1200,
+        "height": 800,
+        "minWidth": 800,
+        "minHeight": 600
+      }
+    ],
+    "security": {
+      "csp": null
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": "all",
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ],
+    "resources": {
+      "../Gemfile": "Gemfile",
+      "../Gemfile.lock": "Gemfile.lock",
+      "../app.rb": "app.rb",
+      "../config.ru": "config.ru",
+      "../config/*": "config/",
+      "../public/*": "public/",
+      "../views/*": "views/"
+    }
+  }
+}