Account reports now support broader keyboard navigation, helping users move through filters, report lines, and actions more efficiently without relying on the mouse. This makes financial reporting workflows faster and more accessible for users who prefer or need keyboard-driven interaction.

This PR enhances the keyboard navigation functionality in account reports,
allowing users to perform various actions more efficiently using keyboard shortcuts.

For a full list of shortcuts, please refer to the [Documentation](https://docs.google.com/spreadsheets/d/11kNokL51XO8ZoOKBTLMNlIdECmtkLzVpbD1Xa9-Wt9Q/edit?usp=sharing)

Task ID: 3769944

The Sign app has been updated to work with a newer PDF viewing engine. This helps keep document preview and signing flows reliable and aligned with current PDF handling improvements.

This commit adapts some code to follow the changes made in PDF.js

Changelogs:
* https://github.com/mozilla/pdf.js/releases/tag/v4.4.168
* https://github.com/mozilla/pdf.js/releases/tag/v4.5.136
* https://github.com/mozilla/pdf.js/releases/tag/v4.6.82
* https://github.com/mozilla/pdf.js/releases/tag/v4.7.76

task-4255281

The timesheet leaderboard now labels totals with the relevant month abbreviation, making it clearer which period the figures refer to. This small wording improvement helps users interpret leaderboard results more quickly and reduces ambiguity.

- Change "total" to "timesheets [month abbreviation]".


task-3906433

This update renames an internal controller setting from “json” to “jsonrpc” to better reflect how Odoo web requests work. It does not change how users or integrations call these features, but it reduces confusion for developers and helps prevent future misconfiguration.

A new GSTR-1 section mapping field is added to customer invoice records in Indian reporting. This helps businesses compare invoice data against GSTR reporting more efficiently and improves accuracy during tax review.

With this PR, gstr-1 section mapping field will be added in `account.move`, enabling efficient cross-verification of user-provided data with GSTR Reporting.

task-3360018

The chatter search experience now opens the search field directly in place, keeping the conversation visible until the user starts searching. This makes it easier for users to look up messages without losing context in the thread.

Purpose of this commit:
Previously, to search for a message in the chatter, users needed to click the search icon, which would open the search panel and hide the thread. With this update, clicking the search icon now opens only the search input, keeping the thread visible until the user actively begins a search

taskid-4260440

Backport of https://github.com/odoo/odoo/pull/185301