[APIView] Convert APIView from Angular 18 to 20

[tjprescott]

Upgrades APIView Client SPA from Angular 18 to 20 to work towards #13057.

[Copilot]

Pull request overview

This PR migrates the APIView ClientSPA application from Angular 18 to Angular 19, implementing the necessary framework updates, modern SCSS patterns, and configuration changes required for compatibility.

Key Changes

• Updated Angular core packages and dependencies from version ^18.2.x to ^19.2.x
• Migrated all SCSS files from deprecated @import to modern @use syntax with proper module namespacing
• Added standalone: false metadata to all components and pipes to maintain NgModule-based architecture
• Migrated from APP_INITIALIZER token to the new provideAppInitializer API
• Updated Angular build configuration from browser to application builder
• Enhanced samples page navigation to preserve API revision query parameters across route transitions
• Upgraded Bootstrap from 5.0.2 to 5.3.3 and updated related dependencies

Reviewed changes

Copilot reviewed 53 out of 55 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/dotnet/APIView/ClientSPA/package.json	Updated Angular packages to v19.2.17, Angular CLI to v19.2.19, and related dependencies including PrimeNG, zone.js, and TypeScript
src/dotnet/APIView/ClientSPA/tsconfig.json	Removed deprecated downlevelIteration compiler option
src/dotnet/APIView/ClientSPA/angular.json	Migrated builder from browser to application, updated output path structure, and added style preprocessor options
src/dotnet/APIView/ClientSPA/src/styles.scss	Converted SCSS imports to modern @use syntax for all style dependencies
src/dotnet/APIView/ClientSPA/src/app/app.module.ts	Migrated from APP_INITIALIZER token to provideAppInitializer function API
src/dotnet/APIView/ClientSPA/src/app/app.component.ts	Added standalone: false metadata to maintain NgModule usage
src/dotnet/APIView/ClientSPA/src/app/app.component.scss	Converted @import to @use with namespace and cleaned up whitespace
src/dotnet/APIView/ClientSPA/src/app/_pipes/*.pipe.ts	Added standalone: false metadata to all pipe declarations
src/dotnet/APIView/ClientSPA/src/app/_components/**/*.component.ts	Added standalone: false metadata to all component declarations
src/dotnet/APIView/ClientSPA/src/app/_components/**/*.component.scss	Migrated SCSS imports to @use syntax with proper namespacing
src/dotnet/APIView/ClientSPA/src/app/_components/samples-page/samples-page.component.ts	Enhanced navigation to preserve activeApiRevisionId and diffApiRevisionId query parameters
src/dotnet/APIView/ClientSPA/src/app/_components/review-page/review-page.component.ts	Updated samples navigation to include API revision query parameters
src/dotnet/APIView/ClientSPA/src/app/_components/review-page/review-page.component.html	Removed unnecessary this. prefix from template binding
src/dotnet/APIView/ClientSPA/src/app/_components/review-page-options/review-page-options.component.html	Removed unnecessary this. prefix from template binding
src/dotnet/APIView/APIViewWeb/Client/package.json	Updated Bootstrap from 5.0.2 to ^5.3.3
src/dotnet/APIView/APIViewWeb/Client/css/shared/bootstrap-defs.scss	New file centralizing Bootstrap SCSS imports for proper module usage
src/dotnet/APIView/APIViewWeb/Client/css/shared/theme-colors.scss	Refactored to use Bootstrap namespace via @use instead of direct imports
src/dotnet/APIView/APIViewWeb/Client/css/**/*.scss	Converted all SCSS files from @import to @use syntax with wildcard namespace
src/dotnet/APIView/APIViewWeb/Client/package-lock.json	Updated Bootstrap lock file entries to version 5.3.8

Files not reviewed (1)

• src/dotnet/APIView/APIViewWeb/Client/package-lock.json: Language not supported

[tjprescott]

The current passing build is deployed to UX test: https://apiviewuxtest.com/

[AlitzelMendez]

I found some issues that are only happening on light mode

1. On view related issues -> Select All (or even simple selecting) the selection is not visually reflected (boxed are not mark as selected)

2. Same issue as above when on "View related issues" -> thumbs down -> select options

Nits

1. On comments -> Edit severity = The edit dropdown doesn't fit in the header

2. On page settings the toggle doesn't have the original shape or location on the dot which makes harder identity the toggle , this is more obvious on light mode