feat: add PWA support and bump project version to 0.3.59

Integrate vite-plugin-pwa to enable service worker generation, offline caching, and standalone display mode. Configure manifest metadata, 192px/512px icons, theme color, and iOS status bar styling. Bump project version to 0.3.59 across Cargo.toml, Cargo.lock, and version.txt, and regenerate package-lock.json.

pmoapp/webapp/package.json

@@ -25,6 +25,7 @@
     "@vue/tsconfig": "^0.8.1",
     "typescript": "~5.8.3",
     "vite": "^7.1.7",
+    "vite-plugin-pwa": "^1.3.0",
     "vue-tsc": "^3.0.7"
   }
 }