Moved inline styles from `EnvelopeViewer.razor` to a new external
CSS file `envelope-viewer.css` for better maintainability and
separation of concerns. Added external JavaScript dependencies
(`pdf.js` and `pdf-viewer.js`) to enable PDF rendering.
Fixed encoding issues in error messages and improved the layout
structure with responsive design rules. Enhanced readability and
usability by organizing styles and ensuring proper localization
support.
Simplified the component by removing unnecessary debug output
and redundant comments. Removed the `OnAfterRenderAsync`
method, which previously handled PDF viewer initialization
and related JavaScript calls. This suggests the initialization
logic has been moved elsewhere or is no longer required in
this component.
Introduced a new Blazor component `EnvelopeViewer.razor` to display PDF documents with a user-friendly interface. The component supports dynamic routing via `/envelope/{EnvelopeKey}` and integrates the `pdf.js` library for efficient PDF rendering in the browser.
Key features include:
- Zoom and navigation controls (Next/Previous page, Zoom In/Out).
- Loading spinner, error handling, and fallback UI for robustness.
- Responsive design with modern styling using CSS.
- JavaScript interop via `pdf-viewer.js` for managing PDF rendering, scaling, and navigation.
Added lifecycle methods (`OnInitializedAsync`, `OnAfterRenderAsync`) for dynamic loading and rendering. Ensured asynchronous operations for smooth user interactions. Included a `DisposeAsync` method for cleanup.
