Added minimal Time Report pdf component

[Ranelkin]

• Created minimal TimeReportPDF component that renders time report with "@react-pdf/renderer";
• • Added dependencies for PDF creation to src/routes/time-tracking/reports.tsx
• Made button in src/routes/time-tracking/reports.tsx create a blob downloadable pdf from TimeReportPDF component

[madisvain]

Hi @Ranelkin! Thank you for putting this together — the time report PDF export is a great feature idea and exactly what we needed. 🙏

After reviewing your implementation, we decided to take a slightly different approach for the PDF generation backend. Instead of using @react-pdf/renderer on the frontend, we've moved PDF rendering to the Rust side using Typst as a Tauri sidecar binary.

The output is the same — a clean PDF with the time report title, date range, optional client name, and the grouped entries table (Name, Entries, Total Time). The key advantages of the Typst approach are:

• Better architectural fit — since Upcount is a Tauri/Rust project, keeping PDF generation on the backend feels more natural and keeps the frontend focused on UI
• Configurable templates — Typst templates are plain .typ text files, which makes it easy for developers (and eventually users) to customize the PDF layout without modifying application code
• Multiple template support — we plan to expand this to also support invoice PDF generation, with the possibility of user-selectable templates for different document types
• Simpler frontend — the React code just calls invoke() with the data and a file path; no need for PDF-specific React components or font loading on the JS side

The implementation is in #209 if you'd like to take a look. Your PR was the catalyst for getting this done, so thank you again for the contribution and the motivation!