feat: update Dockerfiles to use explicit image paths and enhance localStorage handling in ThemeService

frontend/src/app/services/browser-storage.ts

@@ -0,0 +1,7 @@
+export function getBrowserStorage(): Storage | null {
+  try {
+    return typeof globalThis.localStorage === 'undefined' ? null : globalThis.localStorage;
+  } catch {
+    return null;
+  }
+}

frontend/src/app/services/theme.service.ts

@@ -1,5 +1,6 @@
 import { DOCUMENT } from '@angular/common';
 import { effect, inject, Injectable, signal } from '@angular/core';
+import { getBrowserStorage } from './browser-storage';
 
 export type ThemePreference = 'light' | 'dark' | 'system';
 
@@ -8,7 +9,7 @@ const THEME_STORAGE_KEY = 'lmnp-theme';
 @Injectable({ providedIn: 'root' })
 export class ThemeService {
   private readonly document = inject(DOCUMENT);
-  private readonly storage = typeof localStorage === 'undefined' ? null : localStorage;
+  private readonly storage = getBrowserStorage();
   private readonly colorSchemeQuery =
     typeof window.matchMedia === 'function'
       ? window.matchMedia('(prefers-color-scheme: dark)')