[FE-03] Build Booking Trends Line Chart for admin analytics dashboard

[devwums]

Problem

The admin analytics dashboard has no booking trend visualisation. Admins cannot spot weekly or monthly usage patterns at a glance.

Proposed Solution

Create frontend/cntr/charts/BookingTrendsChart.tsx using the installed recharts library. Renders a LineChart with two lines: "New Bookings" (blue) and "Cancellations" (red) over a time axis. Props: data: { date: string, bookings: number, cancellations: number }[], period: 'week' | 'month'. Shows a skeleton when data is empty. All implementation must live inside frontend/cntr/.

Acceptance Criteria

• File at frontend/cntr/charts/BookingTrendsChart.tsx
• Uses recharts LineChart, Line, XAxis, YAxis, Tooltip, Legend, ResponsiveContainer
• Two distinct coloured lines as specified
• Responsive — uses ResponsiveContainer with 100% width
• Shows a loading placeholder when data.length === 0
• Test in frontend/cntr/charts/BookingTrendsChart.test.tsx

[walexjnr]

@walexjnr has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi am a full stack developer, i build solutions that are maintainable and robust. I will like to work on this task.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @walexjnr to this issue.

[drips-wave]

Congratulations, @walexjnr! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @walexjnr: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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