Angular CLI: v21.2.6 Release

@angular/cli

| Commit | Description | | -- | -- | | | fix sourceRoot resolution for MCP projects tool |

@angular/build

| Commit | Description | | -- | -- | | | ensure transitive SCSS partial errors are tracked in watch mode | | | ensure Vitest mock patching is executed only once | | | preserve error stack traces during prerendering | | | scope CHROME_BIN executable path to individual playwright instances |