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name: Building Frontend Dashboards description: Build responsive React dashboards with TypeScript, shadcn/ui, TanStack Query, and Supabase for event-studio. Use when user mentions dashboard, metrics, KPI cards, data tables, charts, analytics, admin panel, Recharts, event management UI, booking interface, financial overview, or asks to create pages with data visualization.

Building Frontend Dashboards

Expert in building React dashboards for the event-studio project.

Project Context

Tech Stack: React 18 + TypeScript + Vite + shadcn/ui + TanStack Query + Supabase

Structure:

src/
├── pages/Dashboard*.tsx       # Route components
├── features/[feature]/hooks/  # Custom hooks (useEvents, etc.)
├── components/ui/             # shadcn/ui components
└── integrations/supabase/     # Supabase client & types

Key Patterns:

• TanStack Query for all data fetching
• Supabase for backend (use supabase client from @/integrations/supabase/client)
• shadcn/ui components (import from @/components/ui/)
• Zustand for state (if needed)
• React Hook Form + Zod for forms

Standard Dashboard Workflow

Copy this checklist and track your progress:

Dashboard Implementation:
- [ ] 1. Identify data requirements (tables, metrics)
- [ ] 2. Create custom hook in features/[feature]/hooks/
- [ ] 3. Build page in src/pages/Dashboard*.tsx
- [ ] 4. Add metric cards and main content
- [ ] 5. Add route in App.tsx
- [ ] 6. Test loading/error states

Step 1: Identify Requirements

Ask user to clarify:

• What data to display?
• What metrics/KPIs?
• What user actions?
• Filters needed?

Step 2: Create Custom Hook

Pattern: Create in src/features/[feature]/hooks/use*.ts

import { useQuery } from '@tanstack/react-query';
import { supabase } from '@/integrations/supabase/client';

export function useDashboardMetrics() {
  return useQuery({
    queryKey: ['dashboard-metrics'],
    queryFn: async () => {
      const { data, error } = await supabase
        .from('events')
        .select('*, bookings(count)');
      if (error) throw error;
      return data;
    },
  });
}

For more patterns: See resources/query-patterns.ts

Step 3: Build Page Structure

Template:

import Sidebar from '@/components/Sidebar';
import { Card } from '@/components/ui/card';

const DashboardNew = () => {
  const { data, isLoading, error } = useYourHook();

  if (isLoading) return <PageLoader />;
  if (error) return <ErrorAlert error={error} />;

  return (
    <div className="flex min-h-screen bg-gray-50">
      <Sidebar />
      <main className="flex-1 p-8">
        <h1 className="text-3xl font-bold mb-6">Dashboard Title</h1>

        {/* Metrics Grid */}
        <div className="grid grid-cols-1 md:grid-cols-4 gap-6 mb-8">
          {/* MetricCard components */}
        </div>

        {/* Main Content */}
        <Card className="p-6">
          {/* DataTable or Charts */}
        </Card>
      </main>
    </div>
  );
};

export default DashboardNew;

Step 4: Use Reusable Components

Import from resources:

import {
  MetricCard,
  DataTable,
  StatusBadge,
  EmptyState,
  ErrorAlert
} from '../skills/frontend-dashboard/resources/component-patterns';

See complete examples: resources/component-patterns.tsx

Quick Reference

Supabase Queries

// Simple query
const { data } = await supabase.from('events').select('*');

// With joins
const { data } = await supabase
  .from('events')
  .select('*, bookings(*), organizer:users(full_name)');

// With filters
const { data } = await supabase
  .from('events')
  .select('*')
  .eq('status', 'active')
  .gte('start_date', date);

More patterns: See resources/supabase-patterns.ts

Common Components

// Metric Card
<MetricCard
  title="Total Revenue"
  value="$125,000"
  change={12.5}
  icon={<DollarSign />}
/>

// Data Table
<DataTable
  data={events}
  columns={[
    { key: 'title', label: 'Event' },
    { key: 'status', label: 'Status', render: (v) => <StatusBadge status={v} /> }
  ]}
  onEdit={(row) => handleEdit(row)}
/>

// Empty State
<EmptyState
  title="No events yet"
  description="Get started by creating your first event"
  action={{ label: "Create Event", onClick: () => navigate('/new') }}
/>

Layouts

7 layout patterns in resources/layout-examples.tsx:

• StandardDashboardLayout (sidebar + content)
• DashboardWithActionsBar (search + filters)
• TabbedDashboard (multi-tab analytics)
• SplitViewDashboard (list + detail)
• GridViewDashboard (grid/list toggle)
• ResponsiveDashboard (mobile-first)
• StickyHeaderDashboard (fixed header)

Examples

Example 1: Events Dashboard

User: "Create a dashboard page showing all events with metrics"

Your Process:

1. Create hook (src/features/events/hooks/useEventsDashboard.ts):

export function useEventsDashboard() {
  return useQuery({
    queryKey: ['events-dashboard'],
    queryFn: async () => {
      const { data, error } = await supabase
        .from('events')
        .select('*, bookings(count, total_amount.sum())')
        .order('created_at', { ascending: false });
      if (error) throw error;
      return data;
    },
  });
}

2. Create page (src/pages/DashboardEvents.tsx) with:

   • Header with "Create Event" button
   • 4 metric cards (total events, active events, revenue, bookings)
   • Search bar and filters
   • DataTable with events
   • Actions: edit, delete, view details

3. Add route in App.tsx:

<Route path="/dashboard/events" element={<DashboardEvents />} />

Example 2: Analytics Dashboard with Charts

User: "Add a revenue analytics page with charts"

Your Response:

1. Create useRevenueAnalytics hook fetching bookings with date grouping
2. Build page with:
   • Revenue metrics cards
   • Line chart (Recharts) showing revenue over time
   • Pie chart for revenue by category
3. Use Recharts components from recharts package
4. Add date range filter

Example 3: Bookings Management

User: "Create a bookings dashboard with search and filters"

Your Implementation:

• Search by attendee name
• Filter by status (pending, confirmed, cancelled)
• DataTable with booking details
• Actions: view ticket, refund, send email
• Export to CSV button

Best Practices

Always:

• Show loading states (skeleton or spinner)
• Handle errors with user-friendly messages
• Make responsive (use md:, lg: prefixes)
• Use TypeScript strictly (no any)
• Validate permissions before showing data

Performance:

• Implement pagination for large datasets
• Use proper TanStack Query caching (queryKey)
• Optimize with React.memo if needed

UX:

• Provide empty states
• Use toast notifications (from sonner)
• Make actions reversible
• Show success feedback

Resources

Complete examples and patterns:

• resources/component-patterns.tsx - Reusable components (MetricCard, DataTable, etc.)
• resources/query-patterns.ts - TanStack Query hooks and patterns
• resources/supabase-patterns.ts - Supabase query examples
• resources/layout-examples.tsx - 7 dashboard layout templates

Troubleshooting

Query not refetching: Use invalidateQueries in mutation onSuccess

RLS blocking queries: Check Supabase RLS policies allow the operation

TypeScript errors: Regenerate types with npx supabase gen types typescript

Not responsive: Use Tailwind responsive prefixes, test in dev tools