## Description
Branded email layouts and other email templates can now contain up to
262,144 characters instead of the generic 20,000-character text limit.
This supports customer layouts around 41 KB and 100 KB while retaining a
defined application-level ceiling. The account and inbox API schemas now
expose the same maximum.
## Closes
[CW-7682](https://linear.app/chatwoot/issue/CW-7682/allow-larger-branded-email-templates)
Related:
[CW-7514](https://linear.app/chatwoot/issue/CW-7514/branded-html-email-templates-per-inboxbrand)
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
- [x] This change requires a documentation update
## How Has This Been Tested?
1. As an administrator with `branded_email_templates` enabled, update an
account branded layout with a 100 KB Liquid layout containing `{{
content_for_layout }}` and confirm the request succeeds.
2. Update an Email inbox layout with more than 262,144 characters and
confirm the API returns `422`.
3. Confirm a layout at exactly 262,144 characters remains valid.
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [ ] I have commented on my code, particularly in hard-to-understand
areas
- [x] I have made corresponding changes to the documentation
- [x] My changes generate no new warnings
- [x] I have added tests that prove my fix is effective or that my
feature works
- [x] New and existing unit tests pass locally with my changes
- [x] Any dependent changes have been merged and published in downstream
modules
65499df6a3