v15.60.0

## Features
* **Salary Slip** emails now wait until the slip’s _Posting Date_ before being sent, preventing premature delivery to employees. The same scheduling applies when slips are submitted in bulk through **Payroll Entry**. (https://github.com/frappe/hrms/pull/4429)

## Bug Fixes
* The **HRMS** page now embeds the correct site name, allowing its live updates to connect properly. (https://github.com/frappe/hrms/pull/4425)
* Fixes total days display in **Attendance Request** list on the mobile app, showing the correct number of days instead of a placeholder. (https://github.com/frappe/hrms/pull/4432)
* Restricts access to **Leave Application** details and leave balances so only the employee or their designated leave approver can view them, blocking all other users. (https://github.com/frappe/hrms/pull/4458)

**Authors**: @marcramser, @asmitahase, @DanielRadlAMR, @iamkhanraheel, @nareshkannasln
**Reviewers**: @asmitahase, @deepeshgarg007

<details>
<summary>AI content</summary>

 For these release notes, we used an LLM (OpenAI o3) to review and summarise the code changes, along with the associated issue and PR descriptions. It may contain typical errors and inaccuracies. You can read the prompt [here](https://github.com/barredterra/pretty_release_notes). 

Changes with the following labels were excluded:
- skip-release-notes

Changes with the following types were excluded:
- refactor
 - docs
 - style
 - build
 - chore
 - ci
 - test

</details>