Add filtering functionality to issues table

[Copilot]

Overview

This PR adds comprehensive filtering capabilities to the Issues table, allowing users to quickly find and analyze specific issues based on multiple criteria.

Changes

Added a filter dialog to the Issues section that supports filtering by:

• Author: Text-based search to filter issues by username (case-insensitive partial matching)
• Status: Filter by Open, Closed, or All issues
• Linked PR: Filter issues that have linked pull requests, no linked pull requests, or all

Features

Interactive Filter Dialog

The filter dialog provides an intuitive interface for applying multiple filters simultaneously. Users can click the Filter button to open the dialog, adjust their criteria, and apply filters with a single click.

Visual Feedback

• Badge Indicator: A numbered badge on the Filter button shows how many filters are currently active
• Issue Count Display: The header updates to show "X of Y issues" when filters are active, making it clear how many issues match the current criteria
• Real-time Updates: Filters are applied immediately when the dialog is closed

Easy Filter Management

• Clear All Button: Reset all filters to their default state with one click
• Persistent State: Filters remain active while browsing the table, allowing users to sort and examine filtered results
• Works with Sorting: The filtering integrates seamlessly with the existing column sorting functionality

Implementation Details

The implementation uses React's useMemo hook to efficiently filter the issues list based on the current filter criteria. The filtering logic:

• Applies all active filters in combination (AND logic)
• Uses case-insensitive partial matching for author names
• Checks for presence/absence of linked PRs
• Preserves the existing sorting behavior

Screenshots

Filter Dialog

The filter dialog provides a clean interface with filtering options for Author, Status, and Linked Pull Request.

Filtered Results

Example showing the table filtered to show only Open issues (3 of 4), with the badge indicator displaying "1" active filter.

Testing

• ✅ Manually tested all filter combinations
• ✅ Verified filters work correctly with table sorting
• ✅ Confirmed Clear All functionality resets all filters
• ✅ Frontend builds successfully with no errors
• ✅ ESLint passes with no warnings

Fixes #23

Original prompt

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This section details on the original issue you should resolve

<issue_title>Add ability to filter issues table by author, date, status, and linked PR</issue_title>
<issue_description>It would be really convenient to be able to filter out entries in the issues table.

</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #23

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[ChrisTimperley]

@copilot Let's remove the date filtering. Otherwise this looks great!

[ChrisTimperley]

@copilot can you handle these changes?

[Copilot]

@copilot can you handle these changes?

Done! Date filtering has been removed in commit e571891.

@copilot Let's remove the date filtering. Otherwise this looks great!

Removed date filtering in commit e571891. The filter dialog now only includes Author, Status, and Linked PR filters.