Remove PWA functionality and service worker infrastructure

Completely remove Progressive Web App features including VitePWA plugin, service workers, install prompts, and platform service PWA methods. Delete PWA component, service worker files, help images, and update build configurations. Simplify application architecture by removing PWA complexity while maintaining core functionality.

vite.config.web.mts

@@ -1,5 +1,4 @@
 import { defineConfig, mergeConfig } from "vite";
-import { VitePWA } from "vite-plugin-pwa";
 import { createBuildConfig } from "./vite.config.common.mts";
 import { loadAppConfig } from "./vite.config.utils.mts";
 
@@ -81,37 +80,6 @@ export default defineConfig(async ({ mode }) => {
     sourcemap: mode === 'development' || mode === 'test',
     // Server configuration inherited from base config
     // CORS headers removed to allow images from any domain
-    plugins: [
-      VitePWA({
-        registerType: 'autoUpdate',
-        manifest: appConfig.pwaConfig?.manifest,
-        // Enable PWA in all web environments for consistent testing
-        devOptions: {
-          enabled: true, // ✅ Enable in all environments
-          type: 'classic'
-        },
-        workbox: {
-          cleanupOutdatedCaches: true,
-          skipWaiting: true,
-          clientsClaim: true,
-          sourcemap: mode !== 'production',
-          maximumFileSizeToCacheInBytes: 10 * 1024 * 1024, // 10MB
-          // Environment-specific caching strategies
-          runtimeCaching: mode === 'production' ? [
-            {
-              urlPattern: /^https:\/\/api\./,
-              handler: 'NetworkFirst',
-              options: {
-                cacheName: 'api-cache',
-                expiration: {
-                  maxEntries: 100,
-                  maxAgeSeconds: 60 * 60 * 24 // 24 hours
-                }
-              }
-            }
-          ] : []
-        }
-      })
-    ]
+    plugins: []
   });
 });