feat: Add Focus Tools (ADHD-friendly productivity features)

- Add Focus Tools dashboard with collapsible help section
- Implement Quick Wins page for tasks under 15 minutes
- Add Single Task Focus mode to reduce overwhelm
- Create Body Doubling page for virtual co-working
- Add visual timer, break reminders, and energy tracking
- Implement hyperfocus protection alerts
- Add ADHD settings panel with customizable options
- Include full English and German translations
- Fix larger touch targets CSS to not break button layouts
- Add Playwright tests for Focus Tools features

client/src/components/AppSidebar.tsx

@@ -1,6 +1,6 @@
 
 import { useTranslation } from 'react-i18next';
-import { Home, Calendar, List, LayoutGrid, Settings, CheckSquare, Target, Trophy, LogOut, Award, Bot, CalendarOff, Bell, Clock } from 'lucide-react';
+import { Home, Calendar, List, LayoutGrid, Settings, CheckSquare, Target, Trophy, LogOut, Award, Bot, CalendarOff, Bell, Clock, Brain } from 'lucide-react';
 import { useQueryClient, useMutation, useQuery } from '@tanstack/react-query';
 import { useToast } from "@/hooks/use-toast";
 import { Button } from "@/components/ui/button";
@@ -58,6 +58,7 @@ export function AppSidebar({ user, ...props }: AppSidebarProps) {
         { title: t('navigation.weekList'), id: 'weeklist', path: '/weeklist', icon: List, color: 'text-pink-500' },
         { title: t('unscheduled.title', 'Unscheduled'), id: 'unscheduled', path: '/unscheduled', icon: CalendarOff, color: 'text-slate-500' },
         { title: t('navigation.kanban'), id: 'kanban', path: '/kanban', icon: LayoutGrid, color: 'text-orange-500' },
+        { title: t('navigation.adhd', 'ADHD Mode'), id: 'adhd', path: '/adhd', icon: Brain, color: 'text-purple-500' },
         { title: t('navigation.achievements'), id: 'achievements', path: '/achievements', icon: Trophy, color: 'text-yellow-500' },
         { title: t('navigation.leaderboard'), id: 'leaderboard', path: '/leaderboard', icon: Award, color: 'text-yellow-500' },
         { title: t('analytics.timeTracking'), id: 'time-tracking', path: '/time-tracking', icon: Clock, color: 'text-teal-500' },