PR Close angular#56563

…ngular#56559)

`getTemplateLocationDetails()` is a devMode only function and should guarded by `ngDevMode` or calling it will throw an error.

fixes angular#56558

PR Close angular#56559

PR Close angular#56581

Prior to this change, is the `Content-Type` passed to the `FetchBackend` was lowercase it was overwritten with the default one.

fixes angular#56539

PR Close angular#56541

PR Close angular#56057

Updates the repo to the stable release of TypeScript 5.5.

PR Close angular#56358

…setter (angular#56573)

This refactor updates the touched, status, and pristine properties to
have a private setter.

PR Close angular#56573

…56527)

Adds the implementation of the following new instructions:
* `declareLet` - creation-time instruction that initializes the slot for a let declaration.
* `storeLet` - update-time instruction that stores the current value of a let declaration.
* `readContextLet` - instruction that reads the stored value of a let declaration from a different view.

On top of the instructions, it also introduces a new `LetDeclaration` TNode type.
The new TNode is nececessary for DI to work correctly in pipes inside the let expression,
as well as for proper hydration support.

PR Close angular#56527

)

Updates the hydration logic to account for the fact that let declarations don't create a DOM node.

PR Close angular#56527

…angular#56369)

`EventContract` usages in Angular now use `false` for
`useActionResolver`. Tests have been updated, with functionality that
depends on `ActionResolver` moving to dispatcher_test.ts.

PR Close angular#56369

PR Close angular#56369

…r#56588)

PR Close angular#56588

Enables the new `@let` syntax by default.

`@let` declarations are defined as:
1. The `@let` keyword.
2. Followed by one or more whitespaces.
3. Followed by a valid JavaScript name and zero or more whitespaces.
4. Followed by the `=` symbol and zero or more whitespaces.
5. Followed by an Angular expression which can be multi-line.
6. Terminated by the `;` symbol.

Example usage:
```
@let user = user$ | async;
@let greeting = user ? 'Hello, ' + user.name : 'Loading';
<h1>{{greeting}}</h1>
```

Fixes angular#15280.

PR Close angular#56715

change "computed" to a term using a backtick
PR Close angular#56671

fixes angular#56568

PR Close angular#56587

…imizedImage` is used too often. (angular#56669)

When the DOM content is loaded, Angular will log a warning message if the `priority` attribute is applied to often on `NgOptimizedImage` directive instances.

PR Close angular#56669

Expression that return iterables can now be spreaded if needed.