Bump @angular/platform-browser from 20.3.17 to 21.2.0 in /web_embedding/ng-flutter (#2814)

Bumps [@angular/platform-browser](https://github.com/angular/angular/tree/HEAD/packages/platform-browser) from 20.3.17 to 21.2.0.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/angular/angular/releases"><code>@​angular/platform-browser</code>'s releases</a>.</em></p>
<blockquote>
<h2>VSCode Extension: 21.2.0</h2>
<ul>
<li>fix(vscode-extension): Highlight function calls with optional chaining (<a href="4f8d3995f0">4f8d3995f0</a>)</li>
<li>feat(language-service): add linked editing ranges for HTML tag synchronization (<a href="8c21866f49">8c21866f49</a>)</li>
<li>fix(vscode-extension): support highlighting for class bindings with brackets (<a href="01ed57f297">01ed57f297</a>)</li>
<li>feat(language-service): add JSON schema for angularCompilerOptions (<a href="496967e7b1">496967e7b1</a>)</li>
<li>fix(language-service): Detect local project version on creation (<a href="8a7cbd4668">8a7cbd4668</a>)</li>
<li>feat(language-server): Support client-side file watching via <code>onDidChangeWatchedFiles</code> (<a href="6fb39d9b62">6fb39d9b62</a>)</li>
<li>feat(language-server): Add completions and hover info for inline styles (<a href="ebc90c26f5">ebc90c26f5</a>)</li>
<li>feat(language-server): Add quick info for inline styles (<a href="573aadef7e">573aadef7e</a>)</li>
<li>feat(language-server): Add folding range support for inline styles (<a href="26fd0839c3">26fd0839c3</a>)</li>
</ul>
<h2>21.2.0</h2>
<h3>common</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="18003a33bb"><img src="https://img.shields.io/badge/18003a33bb-feat-blue" alt="feat - 18003a33bb" /></a></td>
<td>add an 'outlet' injector option for ngTemplateOutlet</td>
</tr>
<tr>
<td><a href="8bbe6dc46c"><img src="https://img.shields.io/badge/8bbe6dc46c-feat-blue" alt="feat - 8bbe6dc46c" /></a></td>
<td>Add Location strategies to manage trailing slash on write</td>
</tr>
<tr>
<td><a href="51cc914807"><img src="https://img.shields.io/badge/51cc914807-feat-blue" alt="feat - 51cc914807" /></a></td>
<td>support height in ImageLoaderConfig and built-in loaders</td>
</tr>
</tbody>
</table>
<h3>compiler</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="72534e2a34"><img src="https://img.shields.io/badge/72534e2a34-feat-blue" alt="feat - 72534e2a34" /></a></td>
<td>Add support for the <code>instanceof</code> binary operator</td>
</tr>
<tr>
<td><a href="95b3f37d4a"><img src="https://img.shields.io/badge/95b3f37d4a-feat-blue" alt="feat - 95b3f37d4a" /></a></td>
<td>Exhaustive checks for switch blocks</td>
</tr>
<tr>
<td><a href="04ba09a8d9"><img src="https://img.shields.io/badge/04ba09a8d9-feat-blue" alt="feat - 04ba09a8d9" /></a></td>
<td>support <code>AstVisitor.visitEmptyExpr()</code></td>
</tr>
<tr>
<td><a href="ce80136e7b"><img src="https://img.shields.io/badge/ce80136e7b-fix-green" alt="fix - ce80136e7b" /></a></td>
<td>optimize away unnecessary restore/reset view calls</td>
</tr>
<tr>
<td><a href="3242a61bae"><img src="https://img.shields.io/badge/3242a61bae-fix-green" alt="fix - 3242a61bae" /></a></td>
<td>variable counter visiting some expressions twice</td>
</tr>
</tbody>
</table>
<h3>compiler-cli</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="473dd3e1cb"><img src="https://img.shields.io/badge/473dd3e1cb-fix-green" alt="fix - 473dd3e1cb" /></a></td>
<td>attach source spans to object literal keys in TCB</td>
</tr>
<tr>
<td><a href="a904d9f77b"><img src="https://img.shields.io/badge/a904d9f77b-fix-green" alt="fix - a904d9f77b" /></a></td>
<td>support nested component declaration</td>
</tr>
<tr>
<td><a href="2ea6dfc6c9"><img src="https://img.shields.io/badge/2ea6dfc6c9-fix-green" alt="fix - 2ea6dfc6c9" /></a></td>
<td>update diagnostic to flag no-op arrow functions in listeners</td>
</tr>
</tbody>
</table>
<h3>core</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="8d5210c9fe"><img src="https://img.shields.io/badge/8d5210c9fe-feat-blue" alt="feat - 8d5210c9fe" /></a></td>
<td>add ChangeDetectionStrategy.Eager alias for Default</td>
</tr>
<tr>
<td><a href="92d2498910"><img src="https://img.shields.io/badge/92d2498910-feat-blue" alt="feat - 92d2498910" /></a></td>
<td>add host node to DeferBlockData (<a href="https://github.com/angular/angular/tree/HEAD/packages/platform-browser/issues/66546">#66546</a>)</td>
</tr>
<tr>
<td><a href="ea2016a6dc"><img src="https://img.shields.io/badge/ea2016a6dc-feat-blue" alt="feat - ea2016a6dc" /></a></td>
<td>add support for nested animations</td>
</tr>
<tr>
<td><a href="81cabc1477"><img src="https://img.shields.io/badge/81cabc1477-feat-blue" alt="feat - 81cabc1477" /></a></td>
<td>add support for TypeScript 6</td>
</tr>
<tr>
<td><a href="1ba9b7ac50"><img src="https://img.shields.io/badge/1ba9b7ac50-feat-blue" alt="feat - 1ba9b7ac50" /></a></td>
<td>resource composition via snapshots</td>
</tr>
<tr>
<td><a href="d9923b72a2"><img src="https://img.shields.io/badge/d9923b72a2-feat-blue" alt="feat - d9923b72a2" /></a></td>
<td>support arrow functions in expressions</td>
</tr>
<tr>
<td><a href="a7e8abbb7e"><img src="https://img.shields.io/badge/a7e8abbb7e-fix-green" alt="fix - a7e8abbb7e" /></a></td>
<td>correctly handle SkipSelf when resolving from embedded view injector</td>
</tr>
<tr>
<td><a href="0806ee3826"><img src="https://img.shields.io/badge/0806ee3826-fix-green" alt="fix - 0806ee3826" /></a></td>
<td>prevent animated element duplication with dynamic components in zoneless mode</td>
</tr>
<tr>
<td><a href="ed78fa05c7"><img src="https://img.shields.io/badge/ed78fa05c7-fix-green" alt="fix - ed78fa05c7" /></a></td>
<td>Remove note to skip arrow functions in best practices</td>
</tr>
</tbody>
</table>
<h3>forms</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="f56bb07d83"><img src="https://img.shields.io/badge/f56bb07d83-feat-blue" alt="feat - f56bb07d83" /></a></td>
<td>add field param to submit action and onInvalid</td>
</tr>
<tr>
<td><a href="ba009b6031"><img src="https://img.shields.io/badge/ba009b6031-feat-blue" alt="feat - ba009b6031" /></a></td>
<td>add form directive</td>
</tr>
<tr>
<td><a href="22afbb2f36"><img src="https://img.shields.io/badge/22afbb2f36-feat-blue" alt="feat - 22afbb2f36" /></a></td>
<td>add parsing support to native inputs (<a href="https://github.com/angular/angular/tree/HEAD/packages/platform-browser/issues/66917">#66917</a>)</td>
</tr>
</tbody>
</table>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/angular/angular/blob/main/CHANGELOG.md"><code>@​angular/platform-browser</code>'s changelog</a>.</em></p>
<blockquote>
<h1>20.3.17 (2026-02-25)</h1>
<h2>Breaking Changes</h2>
<h3>core</h3>
<ul>
<li>
<p>Angular now only applies known attributes from HTML in translated ICU content. Unknown attributes are dropped and not rendered.</p>
<p>(cherry picked from commit 03da204b6daa5e4583e0d0968c2107390bbd8235)</p>
</li>
</ul>
<h3>core</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="7f9de3c118">7f9de3c118</a></td>
<td>fix</td>
<td>block creation of sensitive URI attributes from ICU messages</td>
</tr>
</tbody>
</table>
<h1>21.2.0 (2026-02-25)</h1>
<h3>common</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="18003a33bb">18003a33bb</a></td>
<td>feat</td>
<td>add an 'outlet' injector option for ngTemplateOutlet</td>
</tr>
<tr>
<td><a href="8bbe6dc46c">8bbe6dc46c</a></td>
<td>feat</td>
<td>Add Location strategies to manage trailing slash on write</td>
</tr>
<tr>
<td><a href="51cc914807">51cc914807</a></td>
<td>feat</td>
<td>support height in ImageLoaderConfig and built-in loaders</td>
</tr>
</tbody>
</table>
<h3>compiler</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="72534e2a34">72534e2a34</a></td>
<td>feat</td>
<td>Add support for the <code>instanceof</code> binary operator</td>
</tr>
<tr>
<td><a href="95b3f37d4a">95b3f37d4a</a></td>
<td>feat</td>
<td>Exhaustive checks for switch blocks</td>
</tr>
<tr>
<td><a href="04ba09a8d9">04ba09a8d9</a></td>
<td>feat</td>
<td>support <code>AstVisitor.visitEmptyExpr()</code></td>
</tr>
<tr>
<td><a href="ce80136e7b">ce80136e7b</a></td>
<td>fix</td>
<td>optimize away unnecessary restore/reset view calls</td>
</tr>
<tr>
<td><a href="3242a61bae">3242a61bae</a></td>
<td>fix</td>
<td>variable counter visiting some expressions twice</td>
</tr>
</tbody>
</table>
<h3>compiler-cli</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="473dd3e1cb">473dd3e1cb</a></td>
<td>fix</td>
<td>attach source spans to object literal keys in TCB</td>
</tr>
<tr>
<td><a href="a904d9f77b">a904d9f77b</a></td>
<td>fix</td>
<td>support nested component declaration</td>
</tr>
<tr>
<td><a href="2ea6dfc6c9">2ea6dfc6c9</a></td>
<td>fix</td>
<td>update diagnostic to flag no-op arrow functions in listeners</td>
</tr>
</tbody>
</table>
<h3>core</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="8d5210c9fe">8d5210c9fe</a></td>
<td>feat</td>
<td>add ChangeDetectionStrategy.Eager alias for Default</td>
</tr>
<tr>
<td><a href="92d2498910">92d2498910</a></td>
<td>feat</td>
<td>add host node to DeferBlockData (<a href="https://redirect.github.com/angular/angular/pull/66546">#66546</a>)</td>
</tr>
<tr>
<td><a href="ea2016a6dc">ea2016a6dc</a></td>
<td>feat</td>
<td>add support for nested animations</td>
</tr>
<tr>
<td><a href="81cabc1477">81cabc1477</a></td>
<td>feat</td>
<td>add support for TypeScript 6</td>
</tr>
<tr>
<td><a href="1ba9b7ac50">1ba9b7ac50</a></td>
<td>feat</td>
<td>resource composition via snapshots</td>
</tr>
<tr>
<td><a href="d9923b72a2">d9923b72a2</a></td>
<td>feat</td>
<td>support arrow functions in expressions</td>
</tr>
<tr>
<td><a href="a7e8abbb7e">a7e8abbb7e</a></td>
<td>fix</td>
<td>correctly handle SkipSelf when resolving from embedded view injector</td>
</tr>
<tr>
<td><a href="0806ee3826">0806ee3826</a></td>
<td>fix</td>
<td>prevent animated element duplication with dynamic components in zoneless mode</td>
</tr>
<tr>
<td><a href="ed78fa05c7">ed78fa05c7</a></td>
<td>fix</td>
<td>Remove note to skip arrow functions in best practices</td>
</tr>
</tbody>
</table>
<h3>forms</h3>
<table>
<thead>
<tr>
<th>Commit</th>
<th>Type</th>
<th>Description</th>
</tr>
</thead>
</table>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="11767cabe4"><code>11767ca</code></a> build: update Jasmine to 6.0.0</li>
<li><a href="85122cb12d"><code>85122cb</code></a> docs: update <code>bootstrapApplication</code> docs</li>
<li><a href="f4469ad583"><code>f4469ad</code></a> refactor(core): update error message links to versioned docs (<a href="https://github.com/angular/angular/tree/HEAD/packages/platform-browser/issues/66374">#66374</a>)</li>
<li><a href="99ad18a4ee"><code>99ad18a</code></a> feat(core): Add stability debugging utility</li>
<li><a href="6270bba056"><code>6270bba</code></a> ci: reformat files</li>
<li><a href="2ccdf50fba"><code>2ccdf50</code></a> refactor(platform-browser): remove unused <code>platformIsServer</code>  flag from renderer</li>
<li><a href="b4f584cf42"><code>b4f584c</code></a> fix(core): return <code>StaticProvider</code> for <code>providePlatformInitializer</code></li>
<li><a href="96b79fc393"><code>96b79fc</code></a> refactor(core): correct all <code>typeof ngDevMode</code> comparison patterns introduced...</li>
<li><a href="c137f1fe91"><code>c137f1f</code></a> docs: ExperimentalIsolatedShadowDom mentions</li>
<li><a href="21ca49cf62"><code>21ca49c</code></a> refactor(core): rename <code>ExperimentalIsolatedShadowDom</code> to <code>IsolatedShadowDom</code></li>
<li>Additional commits viewable in <a href="https://github.com/angular/angular/commits/v21.2.0/packages/platform-browser">compare view</a></li>
</ul>
</details>
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web_embedding/ng-flutter/package.json

@@ -18,7 +18,7 @@
     "@angular/core": "^21.2.0",
     "@angular/forms": "^21.1.0",
     "@angular/material": "^21.1.1",
-    "@angular/platform-browser": "^20.0.3",
+    "@angular/platform-browser": "^21.2.0",
     "@angular/platform-browser-dynamic": "^21.1.2",
     "@angular/router": "^21.1.0",
     "rxjs": "~7.8.1",