update[angular]: Upgrade Angular SDK and test apps to Angular 19

[floating-dynamo]

Description

• We need to move the Angular SDK from v17 to v19 so that the generated output can drop the deprecated allowWriteSignals flag (deprecated in 19+) (Mitosis PR)
• So going forward the SDK supports only Angular 19+

Screenshot
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Note

High Risk
Breaking peer dependency and generated effect() behavior for all Angular SDK consumers; large removal/rename of test apps and CI matrix changes.

Overview
Breaking change: @builder.io/sdk-angular now requires Angular ≥ 19.0.0 and drops the deprecated allowSignalWrites option from generated effect() calls (documented in changeset).

The Angular 17 e2e apps and snippets are removed; existing angular-19 / angular-19-ssr apps are renamed and retargeted as the sole Angular test matrix (CI, SERVER_NAME, Playwright skips, and spec targets). Dependencies move to 19.2.x (CLI, SSR, TypeScript ~5.6, zone.js ~0.15).

SSR entry points are updated for Angular 19: bootstrapApplication receives BootstrapContext, CommonEngine uses allowedHosts, and snippet/e2e servers align with @angular/ssr/node and ** route patterns where applicable.

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[changeset-bot]

🦋 Changeset detected

Latest commit: fea0361

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@builder.io/sdk-angular	Minor

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☁️ Nx Cloud last updated this comment at 2026-06-02 11:00:10 UTC

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☁️ Nx Cloud last updated this comment at 2026-06-01 04:15:58 UTC

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View your CI Pipeline Execution ↗ for commit 961d39f

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☁️ Nx Cloud last updated this comment at 2026-06-01 04:25:07 UTC