feat(PdfViewer): add PdfViewer component

[ArgoZhang]

Link issues

fixes #6163

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

Summary by Sourcery

Introduce a new PdfViewer component for rendering PDF documents, including a demo page in the application menu, localization, and documentation updates.

New Features:

• Add PdfViewer component with support for stream mode, zoom, page modes, watermark, search, and navigation
• Provide a dedicated sample page (/pdf-viewer) showcasing PdfViewer usage with interactive configuration

Enhancements:

• Register the PdfViewer demo in the application menu under "PdfViewer"
• Add localization entries for PdfViewer labels and descriptions in English and Chinese

Documentation:

• Update docs.json to include PdfViewer documentation and sample
• Add localized descriptions for PdfViewer in en-US and zh-CN locale files

[sourcery-ai]

Reviewer's Guide

Introduces a new PdfViewer component by registering it in the application menu, updating server project references, extending localization and documentation entries, and providing a sample page with full code-behind implementation.

File-Level Changes

Change	Details	Files
Registered new PdfViewer route in application menu	Inserted a new DemoMenuItem with IsNew flag Set Text to localized "PdfViewer" Mapped Url to "/pdf-viewer"	src/BootstrapBlazor.Server/Extensions/MenusLocalizerExtensions.cs
Added PdfViewer package reference in server project	Referenced BootstrapBlazor.PdfViewer NuGet package Updated package version	src/BootstrapBlazor.Server/BootstrapBlazor.Server.csproj
Extended localization and documentation for PdfViewer	Added title, description, and demo labels in en-US.json and zh-CN.json Updated docs.json with PdfViewer metadata	src/BootstrapBlazor.Server/Locales/en-US.json src/BootstrapBlazor.Server/Locales/zh-CN.json src/BootstrapBlazor.Server/docs.json
Implemented PdfViewer sample page and code-behind	Created PdfViewers.razor with DemoBlock markup for PdfViewer Implemented PdfViewers.razor.cs with component state and control methods Defined attribute metadata list for PdfReader	src/BootstrapBlazor.Server/Components/Samples/PdfViewers.razor src/BootstrapBlazor.Server/Components/Samples/PdfViewers.razor.cs

Assessment against linked issues

Issue	Objective	Addressed	Explanation
#6163	Implement a PdfViewer component.	✅
#6163	Add a demo page for the PdfViewer component.	✅
#6163	Add the PdfViewer component to the menu.	✅

Possibly linked issues

• feat(PdfViewer): add PdfViewer component #6163: PR adds the PdfViewer component as requested in issue feat(PdfViewer): add PdfViewer component #6163.
• feat(PdfViewer): add PdfViewer component #6163: The PR adds a new PdfViewer component which resolves the JavaScript interop warning in Blazor Server caused by the PdfReader component.
• feat(PdfViewer): add PdfViewer component #6163: The PR adds a new PdfViewer component aimed at fixing the rendering issue in dotnet 9 reported in the issue.

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[sourcery-ai]

Hey @ArgoZhang - I've reviewed your changes - here's some feedback:

• Rename PdfViewers.razor (and its code‐behind class) to singular PdfViewer to align file names, route ("/pdf-viewer"), component name, and localization keys.
• Add bounds checks in ApplyPagePrevious/ApplyPageNext to ensure Page never falls below 1 (or exceeds total pages) before calling Refresh.
• Extract the repetitive switch logic in ApplyZoom and ApplyPageMode into reusable helper methods or data-driven mappings to reduce boilerplate.

Here's what I looked at during the review

• 🟡 General issues: 1 issue found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.99%. Comparing base (406eb19) to head (ac2fe9a).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #6164   +/-   ##
=======================================
  Coverage   99.99%   99.99%           
=======================================
  Files         704      704           
  Lines       31099    31099           
  Branches     4395     4395           
=======================================
  Hits        31098    31098           
  Partials        1        1           

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