[lachiebol]

Description

Issue: 13 UI screenshots (8 Slack_*, 5 CustomAlerts_*) failed with border-only diffs: the select boxes and the bottom border of the help boxes. All changed pixels are grey and lighter, and no image changed size. Matomo core #25424 "Update default border-color" (merged 2026-10-09) changed @theme-color-border to the lighter #e0e0e0 in light mode. This is a deliberate breaking change, so the new renders are the correct baseline for 6.x-dev.

Fix: re-synced the 13 failing screenshots from the scheduled CI run on 6.x-dev. No test code or plugin source changed.

Automated fix for failing tests on 6.x-dev.

• Failing workflow: Plugin Slack Tests
• Failing job(s): UI
• CI run: https://github.com/matomo-org/plugin-Slack/actions/runs/38026218455

Generated by automated-test-fixes.

Issue No

Steps to Replicate the Issue

Checklist

• [✖] Tested locally or on demo2/demo3?
• [✔] New test case added/updated?
• [NA] Are all newly added texts included via translation?
• [NA] Are text sanitized properly? (Eg use of v-text v/s v-html for vue)
• [NA] Version bumped?
• [✔] I have understood, reviewed, and tested all AI outputs before use
• [✔] All AI instructions respect security, IP, and privacy rules
• [NA] Documentation updated?