TF-4190 Performance issue to edit thread favorites

[dab246]

Issue

#4190

Resolved

https://github.com/user-attachments/assets/858f2b8d-d38e-4a1d-9832-c542a5942092

Summary by CodeRabbit

• New Features

  • Instant in-memory keyword toggling so star/unstar updates propagate across mailbox, thread and single-email views.
  • Thread-aware marking: star/unstar actions now preserve thread context.

• Bug Fixes

  • More consistent star/unstar state sync to prevent stale presentation data.
  • Suppressed redundant success toasts for thread-originated actions.

• Refactor

  • Unified handling of email action success paths via shared extensions.

• Tests

  • Added tests for keyword map helpers and email keyword toggling.

_{✏️ Tip: You can customize this high-level summary in your review settings.}