TF-4392 [Team Mailbox] Edit email in Drafts folder as new in the composer

[dab246]

Issue

#4392

User story 2

AS a team mailbox member
GIVEN I edit an email with a team mailbox member identity
WHEN I close my composer
THEN it is saved in the team mailbox Draft folder

Summary by CodeRabbit

• Bug Fixes
  • Fixed draft mailbox detection to work reliably across all mailbox types.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 3d962b4b-81ed-4418-8e16-f1a9f6c0be9b

📥 Commits

Reviewing files that changed from the base of the PR and between c17782b and 36b7090.

📒 Files selected for processing (1)

• model/lib/extensions/presentation_mailbox_extension.dart

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Walkthrough

The isDrafts getter in PresentationMailboxExtension is modified to handle personal and non-personal mailboxes differently. For personal mailboxes, it retains the existing role comparison logic. For non-personal (team) mailboxes, a new isDraftsTeamMailbox helper method is introduced that checks if the mailbox is a child of team mailboxes and compares the lowercase mailbox name against the lowercase drafts role constant.

Suggested labels

customer

Suggested reviewers

• tddang-linagora
• hoangdat
• chibenwa

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly references the main change: team mailbox drafts handling in the composer. It directly describes the key feature being implemented (editing emails in team mailbox drafts).
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch bugfix/tf-4392-team-mailbox-save-to-team-draft-folder

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[github-actions]

This PR has been deployed to https://linagora.github.io/tmail-flutter/4419.