Push event payload body updates

[jhutarek]

This reopens #2626.

[Copilot]

Pull request overview

Updates the Web Push Notification::EventPayload body strings to provide more informative, action-specific messages (instead of the prior minimal fallback), aligning push notifications better with how mobile/web clients display notification bodies.

Changes:

• Expand Notification::EventPayload#body to handle additional card actions (triage, sent back to triage, board/collection moves, title changes, postponed/auto-postponed).
• Add private helpers (column_name, new_location_name, new_title) to extract message details from event.particulars.
• Add/extend Web push payload tests to cover the new messages and fallback behavior when particulars are missing/blank.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
app/models/notification/event_payload.rb	Adds action-specific push notification body text and helper methods to pull details from event.particulars.
test/models/notification/push_target/web_test.rb	Adds coverage ensuring Web push payload body matches new action-specific messages and fallbacks.

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