fix: unified inbox swipe delete

[namelessweakl1ng]

Summary

Fixes an issue where swipe-to-delete in Unified Inbox only persisted for the first message deletion during an app session.

Previously:

• The first swipe deletion worked correctly.
• Subsequent swipe deletions temporarily removed messages from the UI, but the messages reappeared after restarting the app.
• Multi-select delete and swipe-delete in individual folders continued to work correctly.

Root Cause

The Unified Inbox swipe-delete flow was not correctly persisting state updates for subsequent delete operations within the same session.

Changes

• Updated the Unified Inbox delete handling to ensure every swipe action correctly persists message deletion state.
• Kept behavior consistent with existing delete flows used by individual folders and multi-select actions.
• Added/updated related logic to prevent stale message state from being restored after app restart.

Testing

Tested by:

1. Opening Unified Inbox
2. Swiping multiple consecutive messages to delete
3. Restarting the app
4. Verifying all swiped messages remained deleted

Also verified:

• Multi-select delete still works
• Swipe-delete in individual folders still works

Fixes #10998

AI Usage Disclosure

AI assistance tools were used to help navigate the repository structure, trace relevant code paths, and assist with implementation/debugging. All code changes were reviewed and validated manually before submission.

[github-actions]

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