build(deps): Bump @angular/core from 17.3.12 to 21.0.0 in /frontend

[dependabot]

Bumps @angular/core from 17.3.12 to 21.0.0.

Release notes

Sourced from @​angular/core's releases.

VSCode Extension: 21.0.0

• fix(language-service): address potential memory leak during project creation (89095946cf)
• fix(language-server): fix directory renaming on Windows (3f7111a9c3)

21.0.0

common

Commit	Description
	Add experimental support for the Navigation API (#63406)
	Support of optional keys for the KeyValue pipe (#48814)
	update to cldr 47 (#64032)
	properly type ngComponentOutlet (#64561)
	improve typing of ngComponentOutletContent (#63674)
	removengModuleFactory input of NgComponentOutlet (#62838)

compiler

Commit	Description
	don't choke on unbalanced parens in declaration block
	support arbitrary nesting in :host-context()
	support commas in :host() argument
	support complex selectors in :nth-child()
	support one additional level of nesting in :host()

compiler-cli

Commit	Description
	Adds diagnostic for misconfigured @defer triggers (#64069)
	enable type checking of host bindings by default (#63654)
	allow value to be set on radio fields
	capture metadata for undecorated fields (#63957)
	disallow compiling with the emitDeclarationOnly TS compiler option enabled (#61609)
	do not flag custom control required inputs as missing when field is present
	infer type of custom field controls
	infer types of signal forms set on native inputs
	make field detection logic more robust
	missingStructuralDirective diagnostic produces false negatives (#64579)
	remove internal syntax-related flags (#63787)
	report invalid bindings on form controls
	use any when checking field interface conformance

core

Commit	Description
	Add migration for zoneless by default. (#63042)
	Allow passing application providers in bootstrapModule options (#64354)
	introduce BootstrapContext for improved server bootstrapping (#63562)
	make SimpleChanges generic (#64535)
	support IntersectionObserver options in viewport triggers (#64130)
	support regular expressions in templates (#63887)
	control not recognized when input has directive injecting ViewContainerRef (#64368)

... (truncated)

Changelog

Sourced from @​angular/core's changelog.

21.0.0 (2025-11-19)

Blog post "Announcing Angular v21".

Breaking Changes

common

• (test only) - TestBed now provides a fake PlatformLocation implementation that supports the Navigation API. This may break some tests, though we have not observed any failures internally. You can revert to the old default for TestBed by providing the MockPlatformLocation from @angular/common/testing in your providers: {provide: PlatformLocation, useClass: MockPlatformLocation}
• ngComponentOutletContent is now of type Node[][] | undefined instead of any[][] | undefined.
• NgModuleFactory has been removed, use NgModule instead.

compiler-cli

• • Previously hidden type issues in host bindings may show up in your builds. Either resolve the type issues or set "typeCheckHostBindings": false in the angularCompilerOptions section of your tsconfig.
• The Angular compiler now produces an error when the the emitDeclarationOnly TS compiler option is enabled as this mode is not supported.

core

• The server-side bootstrapping process has been changed to eliminate the reliance on a global platform injector.

  Before:

  const bootstrap = () => bootstrapApplication(AppComponent, config);

  After:

  const bootstrap = (context: BootstrapContext) =>
    bootstrapApplication(AppComponent, config, context);

  A schematic is provided to automatically update main.server.ts files to pass the BootstrapContext to the bootstrapApplication call.

  In addition, getPlatform() and destroyPlatform() will now return null and be a no-op respectively when running in a server environment.

• Using a combination of provideZoneChangeDetection while also removing ZoneJS polyfills will no longer result in the internal scheduler being disabled. All Angular applications now consistenly use the same scheduler, and those with the Zone change detection provider include additional automatic scheduling behaviors based on

... (truncated)

Commits

• 77fc03f build: update cross-repo angular dependencies
• 1b43bfb build: update cross-repo angular dependencies
• 127cadd Revert "refactor(core): let the profiler handle asymmetric events leniently"
• e430d69 Revert "fix(core): notify profiler events in case of errors"
• 035e07e refactor(core): promote the custom track profiler to stable.
• 6aa4b7e refactor(forms): avoid console warnings when setting NaN
• e682f00 refactor(forms): reduce boilerplate needed to define custom controls
• 780e372 refactor(core): let the profiler handle asymmetric events leniently
• 7ada251 fix(core): notify profiler events in case of errors
• a7dddcc docs: Adds links to relevant guides for APIs in core package
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot merge will merge this PR after your CI passes on it
• @dependabot squash and merge will squash and merge this PR after your CI passes on it
• @dependabot cancel merge will cancel a previously requested merge and block automerging
• @dependabot reopen will reopen this PR if it is closed
• @dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)