feat: Transform to Tauri desktop app

- Initialize Tauri v2 project with Rust backend
- Restructure project: move source files to src/ directory
- Add Tauri configuration for Windows, macOS, and Linux builds
- Update Vite config for Tauri development workflow
- Add file system and dialog permissions for native features
- Update package.json with desktop build scripts
- Update tsconfig.json paths for new src structure
- Add Tauri and desktop badges to README
- Document desktop build process and architecture

src-tauri/tauri.conf.json

@@ -0,0 +1,56 @@
+{
+  "$schema": "../node_modules/@tauri-apps/cli/config.schema.json",
+  "productName": "TypoGenie",
+  "version": "1.0.0",
+  "identifier": "live.lashman.typogenie",
+  "build": {
+    "frontendDist": "../dist",
+    "devUrl": "http://localhost:3000",
+    "beforeDevCommand": "npm run dev",
+    "beforeBuildCommand": "npm run build"
+  },
+  "app": {
+    "windows": [
+      {
+        "label": "main",
+        "title": "TypoGenie",
+        "width": 1400,
+        "height": 900,
+        "minWidth": 1000,
+        "minHeight": 700,
+        "resizable": true,
+        "fullscreen": false,
+        "center": true,
+        "decorations": true,
+        "transparent": false,
+        "visible": false
+      }
+    ],
+    "security": {
+      "csp": "default-src 'self'; connect-src 'self' https://fonts.googleapis.com https://fonts.gstatic.com; font-src 'self' https://fonts.gstatic.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; img-src 'self' data: blob:;"
+    }
+  },
+  "bundle": {
+    "active": true,
+    "targets": ["msi", "nsis", "dmg", "app", "deb", "rpm", "appimage"],
+    "icon": [
+      "icons/32x32.png",
+      "icons/128x128.png",
+      "icons/128x128@2x.png",
+      "icons/icon.icns",
+      "icons/icon.ico"
+    ],
+    "category": "Productivity",
+    "shortDescription": "Markdown to Word document converter",
+    "longDescription": "TypoGenie is a free, open-source typesetting engine that transforms Markdown into beautifully formatted Microsoft Word documents with 40+ professional styles.",
+    "publisher": "TypoGenie Contributors",
+    "copyright": "Copyright (c) 2026 TypoGenie Contributors",
+    "license": "MIT",
+    "homepage": "https://git.lashman.live/lashman/typogenie",
+    "windows": {
+      "webviewInstallMode": {
+        "type": "embedBootstrapper"
+      }
+    }
+  }
+}