Fix theme switcher persistence and hardcoded dark colors in SCSS

- ThemeSwitcher: save user's theme choice to localStorage and restore on mount
- Vuetify plugin: check localStorage before falling back to subdomain default
- _layouts.scss: make navbar and footer theme-aware using CSS custom properties
  (sidebar intentionally stays always-dark per design spec)
- _marketing.scss: make glass-card and hero-gradient-text theme-aware

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

website/resources/styles/_layouts.scss

@@ -134,17 +134,17 @@
   }
 }
 
-// Top navbar
+// Top navbar — theme-aware
 .app-navbar {
   position: fixed;
   top: 0;
   right: 0;
   left: $sidebar-width;
   height: $navbar-height;
-  background: rgba($dark-bg, 0.8);
+  background: rgba(var(--v-theme-surface), 0.8);
   backdrop-filter: blur(12px);
   -webkit-backdrop-filter: blur(12px);
-  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
+  border-bottom: 1px solid rgba(var(--v-theme-on-surface), 0.06);
   z-index: $z-navbar;
   display: flex;
   align-items: center;
@@ -181,11 +181,11 @@
   margin-inline: auto;
 }
 
-// Footer
+// Footer — theme-aware
 .app-footer {
   padding: 16px 24px;
   font-size: 0.8125rem;
-  color: rgba(255, 255, 255, 0.4);
+  color: rgba(var(--v-theme-on-surface), 0.4);
   flex-shrink: 0;
 }
 

website/resources/styles/_marketing.scss

@@ -40,9 +40,12 @@
   }
 }
 
-// Glass morphism cards
+// Glass morphism cards — theme-aware
 .glass-card {
-  @include glass-morphism(0.08, 20px);
+  background: rgba(var(--v-theme-surface), 0.6);
+  backdrop-filter: blur(20px);
+  -webkit-backdrop-filter: blur(20px);
+  border: 1px solid rgba(var(--v-theme-on-surface), 0.08);
   border-radius: $radius-lg;
   transition: transform $transition-base, box-shadow $transition-base;
 
@@ -52,9 +55,9 @@
   }
 }
 
-// Animated gradient text
+// Animated gradient text — theme-aware
 .hero-gradient-text {
-  background: linear-gradient(135deg, $primary-light 0%, $info 50%, $primary-light 100%);
+  background: linear-gradient(135deg, rgb(var(--v-theme-primary)) 0%, $info 50%, rgb(var(--v-theme-primary)) 100%);
   background-size: 200% auto;
   background-clip: text;
   -webkit-background-clip: text;

website/resources/ts/Components/ThemeSwitcher.vue

@@ -1,10 +1,21 @@
 <script lang="ts" setup>
+import { onMounted } from 'vue'
 import { useTheme } from 'vuetify'
 
+const STORAGE_KEY = 'ezscale-theme'
 const theme = useTheme()
 
+onMounted(() => {
+  const saved = localStorage.getItem(STORAGE_KEY)
+  if (saved === 'light' || saved === 'dark') {
+    theme.global.name.value = saved
+  }
+})
+
 function toggleTheme(): void {
-  theme.global.name.value = theme.global.current.value.dark ? 'light' : 'dark'
+  const next = theme.global.current.value.dark ? 'light' : 'dark'
+  theme.global.name.value = next
+  localStorage.setItem(STORAGE_KEY, next)
 }
 </script>
 

website/resources/ts/plugins/vuetify/index.ts

@@ -7,10 +7,16 @@ import { themes } from './theme'
 import 'vuetify/styles'
 
 export default function installVuetify(app: App): void {
-  // Determine default theme based on subdomain
+  const saved = typeof window !== 'undefined' ? localStorage.getItem('ezscale-theme') : null
+  let defaultTheme: string
+
+  if (saved === 'light' || saved === 'dark') {
+    defaultTheme = saved
+  } else {
     const hostname = typeof window !== 'undefined' ? window.location.hostname : ''
     const isMarketing = !hostname.startsWith('account.') && !hostname.startsWith('admin.')
-  const defaultTheme = isMarketing ? 'light' : 'dark'
+    defaultTheme = isMarketing ? 'light' : 'dark'
+  }
 
   const vuetify = createVuetify({
     defaults,