fix(Pivot): Fix pivot selector error when initializing. Fix adding row dimension with API

[mddragnev]

Closes #17590 #17591

Description

Fix pivot selector initialization.
Fix row adding through the insertDimensionAt public API

Motivation / Context

Those issues are regressed with the removal of the zone.js from the repo.

Type of Change (check all that apply):

• Bug fix
• New functionality
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactoring (no functional changes)
• Documentation
• Demos
• CI/CD
• Tests
• Changelog
• Skills/Agents

Component(s) / Area(s) Affected:

How Has This Been Tested?

• Unit tests
• Manual testing
• Automated e2e tests

Test Configuration:

• Angular version:
• Browser(s):
• OS:

Screenshots / Recordings

Checklist:

• All relevant tags have been applied to this PR
• This PR includes unit tests covering all the new code (test guidelines)
• This PR includes API docs for newly added methods/properties (api docs guidelines)
• This PR includes feature/README.MD updates for the feature docs
• This PR includes general feature table updates in the root README.MD
• This PR includes CHANGELOG.MD updates for newly added functionality
• This PR contains breaking changes
• This PR includes ng update migrations for the breaking changes (migrations guidelines)
• This PR includes behavioral changes and the feature specification has been updated with them
• Accessibility (ARIA, keyboard navigation, focus management) has been verified

[Copilot]

🟡 Changes recommended

The Pivot Data Selector grid input setter can throw at runtime when grid is temporarily undefined/null due to unguarded subscription setup.

Once you've addressed the issues Copilot identified, you can request another Copilot review.

Pull request overview

Fixes Pivot Grid + Pivot Selector regressions in zoneless/Angular Elements scenarios by ensuring configuration changes trigger the right re-rendering paths and by adding targeted regression tests.

Changes:

• Emit pivotConfigurationChange when the entire pivotConfiguration input is replaced, and ensure CD is scheduled after non-filter dimension inserts.
• Update Pivot Data Selector to retrigger its filtering pipe when the grid’s pivot configuration changes (subscription + markForCheck).
• Add unit/regression tests for row dimension insertion via insertDimensionAt and for Elements initialization with a pivot selector.

File summaries

File	Description
projects/igniteui-angular/grids/pivot-grid/src/pivot-grid.component.ts	Emits config-change on full config replacement; schedules CD after non-filter inserts to address zoneless update gaps.
projects/igniteui-angular/grids/pivot-grid/src/pivot-data-selector.component.ts	Subscribes to grid config changes and retriggers selector filtering + marks for check.
projects/igniteui-angular/grids/pivot-grid/src/pivot-data-selector.component.html	Switches pipe trigger input from grid?.pipeTrigger to a selector-owned retrigger counter.
projects/igniteui-angular/grids/pivot-grid/src/pivot-grid.spec.ts	Adds regression test for inserting a row dimension and verifying rendered headers.
projects/igniteui-angular-elements/src/app/custom-strategy.spec.ts	Adds Elements regression test ensuring pivot grid + selector initialize without ExpressionChangedAfterItHasBeenCheckedError.

Review details

• Files reviewed: 5/5 changed files
• Comments generated: 4
• Review effort level: Lite

---

💡 Add a code-review agent skill for context-aware, tailored reviews. Learn more in the docs.