Integrated DevExpress Blazor components and added a responsive,
modern UI for the sender dashboard. Replaced placeholder content
with a functional layout, including a grid-based envelope viewer
with filtering, pagination, and detailed row templates.
Added status badges, progress indicators, and a sender action
bar with buttons for creating, editing, deleting, refreshing
envelopes, and logging out. Introduced loading and error
handling states for better user experience.
Refactored data loading with `LoadEnvelopesAsync` to fetch and
categorize envelopes. Added methods for envelope management
and logout functionality. Improved state management and removed
unused code. These changes lay the groundwork for future
enhancements.
TekH
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