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

shared/schema.ts

@@ -19,9 +19,15 @@ export const users = pgTable("users", {
   isSearchable: boolean("is_searchable").notNull().default(false), // Privacy setting
   apiKey: text("api_key"), // For MCP Server access
   aiEnabled: boolean("ai_enabled").notNull().default(true), // Feature flag per user
-  routineConfig: json("routine_config").$type<{ morningTime: string, eveningTime: string, enabled: boolean }>().default({ morningTime: "09:00", eveningTime: "17:00", enabled: true }),
+  routineConfig: json("routine_config").$type<{ morningTime: string, eveningTime: string, enabled: boolean }>().default({ morningTime: "09:00", eveningTime: "17:00", enabled: false }),
   lastMorningRoutine: timestamp("last_morning_routine"),
   lastEveningRoutine: timestamp("last_evening_routine"),
+
+  // 2FA Fields
+  is2faEnabled: boolean("is_2fa_enabled").notNull().default(false),
+  otpCode: text("otp_code"), // The temporary 6-digit code
+  otpExpiresAt: timestamp("otp_expires_at"),
+  language: text("language").notNull().default("en"), // 'en' | 'de'
 });
 
 export const systemSettings = pgTable("system_settings", {
@@ -98,6 +104,7 @@ export const insertUserSchema = createInsertSchema(users).pick({
   showOnLeaderboard: true,
   isSearchable: true,
   aiEnabled: true,
+  language: true,
 });
 
 export const registerSchema = insertUserSchema;
@@ -120,8 +127,8 @@ export const insertLabelSchema = createInsertSchema(labels).omit({
 });
 
 export const insertTaskSchema = createInsertSchema(tasks, {
-  dueDate: z.coerce.date().nullable(),
-  startDate: z.coerce.date().nullable(),
+  dueDate: z.coerce.date().nullable().optional(),
+  startDate: z.coerce.date().nullable().optional(),
 }).omit({
   id: true,
   userId: true, // We will set this server-side