chore(deps): bump postcss and @angular-devkit/build-angular in /ui

[dependabot]

Bumps postcss to 8.5.12 and updates ancestor dependency @angular-devkit/build-angular. These dependencies need to be updated together.

Updates postcss from 8.5.6 to 8.5.12

Release notes

Sourced from postcss's releases.

8.5.12

• Fixed reading any file via user-generated CSS.
• Added opts.unsafeMap to disable checks.

8.5.11

• Fixed nested brackets parsing performance (by @​offset).

8.5.10

• Fixed XSS via unescaped </style> in non-bundler cases (by @​TharVid).

8.5.9

• Speed up source map encoding paring in case of the error.

8.5.8

• Fixed Processor#version.

8.5.7

• Improved source map annotation cleaning performance (by CodeAnt AI).

Changelog

Sourced from postcss's changelog.

8.5.12

• Fixed reading any file via user-generated CSS.
• Added opts.unsafeMap to disable checks.

8.5.11

• Fixed nested brackets parsing performance (by @​offset).

8.5.10

• Fixed XSS via unescaped </style> in non-bundler cases (by @​TharVid).

8.5.9

• Speed up source map encoding paring in case of the error.

8.5.8

• Fixed Processor#version.

8.5.7

• Improved source map annotation cleaning performance (by CodeAnt AI).

Commits

• 9bc81c4 Release 8.5.12 version
• 85c4d7d Another try to fix coverage
• 94484ca Try to fix coverage
• c64b748 Load only .map source maps
• aaec7b7 Avoid throwing JSON parsing errors for non-JSON source maps
• 233fb26 Mention original author of the solution
• 2502f75 Release 8.5.11 version
• 5ca1901 Speed up parsing many nested brackets
• 42b5337 Update dependencies
• 7e36e15 Cache node.raws locally in Stringifier hot methods
• Additional commits viewable in compare view

Updates @angular-devkit/build-angular from 20.3.24 to 21.2.9

Release notes

Sourced from @​angular-devkit/build-angular's releases.

21.2.9

@​schematics/angular

Commit	Description
	add missing imports for focus and skip APIs in refactor-jasmine-vitest

@​angular/cli

Commit	Description
	fix broken img ref in ai-tutor
	introduce initial package manager workspace awareness
	remove standalone true ref in ai tutor

@​angular/ssr

Commit	Description
	introduce trustProxyHeaders option to safely validate and sanitize proxy headers
	add support for configuring trusted proxy headers via environment variable
	decode route segments when building and matching route tree
	use router to normalize URLs for comparison

21.2.8

@​angular/cli

Commit	Description
	dynamically resolve project Angular CLI executable inside MCP tools
	ignore EBADF file system errors during MCP project scan
	use headless option in MCP test tool

@​angular-devkit/build-angular

Commit	Description
	ensure route has leading slash in prerender builder
	fix app-shell route format and

@​angular/build

Commit	Description
	use rootDir for HMR component updates path resolution
	validate V8 coverage support for browsers in Vitest

21.2.7

@​angular/cli

Commit	Description
	handle missing package manager during analytics initialization

@​angular/build

Commit	Description
	preserve coverage ignore comments in development
	show clear error when styleUrl points to a TypeScript file

21.2.6

@​angular/cli

... (truncated)

Changelog

Sourced from @​angular-devkit/build-angular's changelog.

21.2.9 (2026-04-29)

@​angular/cli

Commit	Type	Description
233deef01	fix	fix broken img ref in ai-tutor
7cea9885c	fix	introduce initial package manager workspace awareness
5b1a5b743	fix	remove standalone true ref in ai tutor

@​schematics/angular

Commit	Type	Description
e7abeb5c7	fix	add missing imports for focus and skip APIs in refactor-jasmine-vitest

@​angular/ssr

Commit	Type	Description
94023f62c	fix	introduce trustProxyHeaders option to safely validate and sanitize proxy headers
5ffe5c309	fix	add support for configuring trusted proxy headers via environment variable
930ada9b7	fix	decode route segments when building and matching route tree
0dc8a440c	fix	use router to normalize URLs for comparison

20.3.25 (2026-04-29)

@​angular-devkit/build-angular

Commit	Type	Description
5e01ef40e	fix	upgrade postcss to 8.5.12

@​angular/ssr

Commit	Type	Description
6686848d9	fix	introduce trustProxyHeaders option to safely validate and sanitize proxy headers

22.0.0-next.6 (2026-04-22)

@​angular/cli

... (truncated)

Commits

• 564b108 release: cut the v21.2.9 release
• dbda92b build: update cross-repo angular dependencies
• 828c175 build: update pnpm to v10.33.2
• a887b94 build: lock file maintenance
• 56d19be build: update cross-repo angular dependencies
• f2f4851 build: update dependency postcss to v8.5.12
• 5ffe5c3 fix(@​angular/ssr): add support for configuring trusted proxy headers via envi...
• 930ada9 fix(@​angular/ssr): decode route segments when building and matching route tree
• 0dc8a44 fix(@​angular/ssr): use router to normalize URLs for comparison
• 7cea988 fix(@​angular/cli): introduce initial package manager workspace awareness
• 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 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)
  You can disable automated security fix PRs for this repo from the Security Alerts page.