Add PDF editing and envelope management features

Introduced a new `SenderEditorPage` with a modern UI for managing envelopes, uploading PDFs, and placing signature fields. Integrated `DevExpress.Blazor.PdfViewer` for PDF rendering and interaction.

Key features include:
- PDF upload, rendering, and validation.
- Signature field placement with normalized coordinates.
- Receiver management with validation and email suggestions.
- Envelope metadata handling (title, message).
- Save as draft and send functionality with validation.
- Edit mode for existing envelopes.
- Improved UX with dynamic elements and color-coded receivers.
- Localization support for multi-language UI.

Updated `_Imports.razor` to include necessary namespaces for DevExpress components and the new `PdfEditor` namespace.
This commit is contained in:
2026-09-29 11:59:06 +02:00
parent 4d3f72a3ed
commit 8a4963472c
3 changed files with 1144 additions and 0 deletions