feat: Notifications page, Sidebar layout fixes, and Achievements enhancements

- implemented /notifications page with overdue/upcoming alerts
- Fixed sidebar scrolling in collapsed mode
- Moved notification button to sidebar footer
- Enhanced Achievements page with streak stats and tooltips
- Improved XP history to show task titles
- Added missing translations (en/de)
- Removed top bar header
- Fixed Docker environment routing

server/storage.ts

@@ -212,6 +212,15 @@ export class MemStorage implements IStorage {
       isSearchable: insertUser.isSearchable ?? false,
       apiKey: null,
       aiEnabled: insertUser.aiEnabled ?? true,
+      // Missing fields fix:
+      language: insertUser.language ?? "en",
+      is2faEnabled: false,
+      otpCode: null,
+      otpExpiresAt: null,
+      lastActive: null,
+      routineConfig: { morningTime: "09:00", eveningTime: "17:00", enabled: true },
+      lastMorningRoutine: null,
+      lastEveningRoutine: null,
     };
     this.users.set(id, user);
     return user;
@@ -1184,6 +1193,8 @@ export class DbStorage implements IStorage {
 }
 
 // Export storage based on environment
-export const storage = process.env.NODE_ENV === 'production' || process.env.USE_DB === 'true'
+// Export storage based on environment
+// Default to database storage if DATABASE_URL is present, otherwise fallback to memory
+export const storage = process.env.DATABASE_URL
   ? new DbStorage()
   : new MemStorage();