## Description
The widget email-transcript button (`ChatFooter.vue`) had no client-side
guard. Its visibility depends only on whether the contact has an email,
and the click handler fired a request on every click with no in-flight
lock, no disabled state, and no post-send handling. A user could
therefore trigger a large number of duplicate transcript emails from a
single conversation just by clicking repeatedly.
This adds a re-entry guard in the handler, disables the button while a
send is in flight, and applies a short cooldown (15s) after a successful
send. Normal use is unaffected: the button sends once, shows the success
toast, then briefly disables and automatically re-enables so a genuine
later re-request still works. On failure the button stays enabled so the
user can retry immediately. The cooldown timer is cleared on unmount.
Using a timed cooldown (rather than a permanent post-send lock) also
avoids the button getting stuck disabled if a resolved conversation is
reopened and later re-resolved.
This is the client-side complement to the server-side rate limit added
in #15085.
Fixes https://linear.app/chatwoot/issue/CW-7640
# Pull Request Template
## Description
**This PR includes:**
* Refactored two legacy mixins (`availability.js`,
`nextAvailability.js`) into a Vue 3 composable (`useAvailability`),
helper module and component based rendering logic.
* Fixed an issue where the widget wouldn't load if business hours were
enabled but all days were unchecked.
* Fixed translation issue
[[#11280](https://github.com/chatwoot/chatwoot/issues/11280)](https://github.com/chatwoot/chatwoot/issues/11280).
* Reduced code complexity and size.
* Added test coverage for both the composable and helper functions.
## Type of change
- [x] Bug fix (non-breaking change which fixes an issue)
## How Has This Been Tested?
### Loom video
https://www.loom.com/share/2bc3ed694b4349419505e275d14d0b98?sid=22d585e4-0dc7-4242-bcb6-e3edc16e3aee
### Story
<img width="995" height="442" alt="image"
src="https://github.com/user-attachments/assets/d6340738-07db-41d5-86fa-a8ecf734cc70"
/>
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] I have commented on my code, particularly in hard-to-understand
areas
- [ ] 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
- [ ] Any dependent changes have been merged and published in downstream
modules
Fixes https://github.com/chatwoot/chatwoot/issues/12012
---------
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
Co-authored-by: Pranav <pranav@chatwoot.com>
Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>
# Replace the deprecated `eventBus` with mitt.js
## Description
Since eventBus and it's respective methods are deprecated and removed
from all future releases of vue, this was blocking us from migrating.
This PR replaces eventBus with
[mitt](https://github.com/developit/mitt). I have created a wrapper
mitt.js to simulate the same old event names so it's backwards
compatible, without making a lot of changes.
Fixes # (issue)
## Type of change
Please delete options that are not relevant.
- [x] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality not to work as expected)
- [ ] This change requires a documentation update
## How Has This Been Tested?
1. Made sure all the places we're listening to bus events are working as
expected.
2. Respective specsf or the events from mitt.
## Checklist:
- [x] My code follows the style guidelines of this project
- [x] I have performed a self-review of my code
- [x] 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
* refactor: use has_email instead of email
* feat: remove usage of details directly in forms
* test: update payload
* test: fix transcript test
* refactor: use computed hasEmail
---------
Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>
This PR will add a new event chatwoot:on-start-conversation to the chat widget, which you can listen to and trigger custom interactions on your end.
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>
