MinerPRsTable: last column shows "Date" regardless of active status filter

[plind-dm]

Problem

In the Miner Details → Pull Requests tab, the last column always displays "Date" as its header and shows the merge date (or Open/Closed text) regardless of which status filter is selected. When a user filters by "Open" or "Closed", showing a date column is misleading since open PRs have no merge date, and closed PRs just show "Closed" text under a "Date" header.

Expected behavior

• All / Merged filter: Column header is "Date", cells show the merge date
• Open / Closed filter: Column header is "Status", cells show the PR state (Open / Merged / Closed)

Steps to reproduce

1. Go to any miner detail page
2. Click the "Pull Requests" tab
3. Click the "Open" or "Closed" filter button
4. Observe the last column still says "Date"

[e35ventura]

could you attach screenshots please