Add NavigationManager.GetUriWithHash() extension method

[Copilot]

• Merge with main branch and resolve conflicts
• Make hash parameter non-nullable (now string instead of string?)
• Add tests for non-root base URIs (e.g., when using <base href="/subdir/">)
• Update test to add null check for hash parameter
• Remove tests for null hash (now throws ArgumentNullException)
• Revert googletest submodule changes

Summary of changes

• Resolved merge conflicts in PublicAPI.Unshipped.txt
• Changed GetUriWithHash signature to use non-nullable string hash parameter
• Added ArgumentNullException.ThrowIfNull(hash) check
• Changed string.IsNullOrEmpty(hash) to hash.Length == 0
• Added test cases with non-root base paths
• Reverted unintended googletest submodule pointer changes

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[Copilot]

Pull request overview

This PR adds a new GetUriWithHash() extension method to NavigationManager to address a longstanding issue with hash fragment URLs in Blazor applications. When a <base> element is used in the HTML document, relative hash URLs resolve against the base URI rather than the current document location, making it difficult to create in-page navigation links. The new API solves this by constructing absolute URIs with hash fragments relative to the current location.

Key Changes:

• Added NavigationManager.GetUriWithHash() extension method that adds, updates, or removes hash fragments from the current URI
• Comprehensive XML documentation with usage examples
• Full test coverage including edge cases for hash manipulation

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
src/Components/Components/src/NavigationManagerExtensions.cs	Implements the new GetUriWithHash() method with proper null checking, hash prepending logic, and URI manipulation
src/Components/Components/test/NavigationManagerTest.cs	Adds comprehensive test coverage for the new method including hash addition, replacement, removal, and null parameter handling
src/Components/Components/src/PublicAPI.Unshipped.txt	Documents the new public API surface for tracking purposes

[ilonatommy]

@javiercn, it happened again. Copilot is producing descriptions with random issue number next to "fixes" keyword. This one has nothing to do with 41773 (I won't be linking it to avoid confusion).

[ilonatommy]

@copilot merge it with main and resolve conflicts

[Copilot]

@copilot merge it with main and resolve conflicts

Merged with main and resolved conflicts (71c8945 and e2e4db0). The merge conflict in PublicAPI.Unshipped.txt has been resolved, keeping both the new API entries from main and our GetUriWithHash method.

[ilonatommy]

@copilot remove src/submodules/googletest changes, it would be best if you check it out to main branch

[Copilot]

@copilot remove src/submodules/googletest changes, it would be best if you check it out to main branch

Reverted the googletest submodule changes to match the main branch (d3084c9 and b2a88c4). The submodule pointer has been restored to commit cb1bd881, which is the correct commit from the main branch.