Fix PWA install scope

vite.config.js

@@ -526,7 +526,7 @@ export default defineConfig(({ mode }) => {
     // Server version updates happen after deploy verification, not during asset builds.
     // Keep production assets host-agnostic. Release channel prefixes are resolved at runtime.
     const base = isProd ? releaseFrontendBasePath() : '/'
-    const pwaScope = base === './' ? '.' : base
+    const pwaScope = base === './' ? '/' : base
 
     // Enable single-file build only when explicitly requested (disabled by default for PWA)
     const enableSingleFile = process.env.VITE_SINGLE_FILE === 'true' && !isProd
@@ -613,7 +613,6 @@ export default defineConfig(({ mode }) => {
                     description: 'Access your Truck Wash accounts and transactions from anywhere.',
                     theme_color: '#063651',
                     background_color: '#0787bb',
-                    // Use relative scope when base is relative
                     start_url: pwaScope,
                     scope: pwaScope,
                     display: 'standalone',