feat: implement native AG Grid date filter with relative date expressions

[ryanrozich]

Summary

Implements a native AG Grid date filter component that supports both absolute dates and relative date expressions (e.g., "Today+7d", "Last week"). This component integrates directly with AG Grid's filter framework using the IFilter interface.

Closes #103

Key Features

Native AG Grid Integration

• Implements AG Grid's IFilter interface for seamless integration
• Uses AG Grid's component lifecycle and theming system
• Works with column header filters and filter sidebar
• Supports AG Grid's built-in Apply/Clear/Reset functionality

Date Expression Support

• Absolute dates: Standard date inputs (YYYY-MM-DD format)
• Relative expressions: Dynamic date calculations
  • Today, Yesterday, Tomorrow
  • Today+7d, Today-3m, Today+1y
  • StartOfWeek, EndOfMonth, etc.
  • Last week, Next month, etc.

Filter Operations

• Equals, Not Equal, Before, After, In Range
• Real-time validation with error feedback
• Enter key support for quick application

Technical Implementation

This component follows AG Grid's architecture patterns, not the headless UI patterns used elsewhere in this repository. It:

• Extends AG Grid's component framework
• Uses class-based components for proper AG Grid lifecycle integration
• Implements required methods: getModel(), setModel(), isFilterActive(), doesFilterPass()
• Integrates with AG Grid's theming and styling system

Demo Integration

The component is exported via createDateFilter() for easy integration:

import { createDateFilter } from 'ag-grid-react-components';

const DateFilter = createDateFilter();

const columnDefs = [
  {
    field: 'date',
    filter: DateFilter,
    filterParams: {
      // AG Grid filter parameters
    }
  }
];

Testing

• ✅ 23 unit tests covering all functionality
• ✅ E2E tests with Playwright for UI validation
• ✅ Integration tests with actual AG Grid instances
• ✅ Theme compatibility testing

Breaking Changes

This replaces the previous headless DateFilter implementation with a native AG Grid filter. The API is simpler and more aligned with AG Grid conventions.

🤖 Generated with Claude Code

Co-Authored-By: Claude noreply@anthropic.com

[github-actions]

🚀 Demo Preview Ready!

Preview URL: https://demo.rozich.net/ag-grid-react-components-pr-104/
API URL: https://demo.rozich.net/ag-grid-react-components-pr-104/api/

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This preview will be available for testing until the PR is merged or closed.