Gantt views no longer show placeholder sample records when there is no real data. This avoids confusing or unattractive totals and keeps attendance and planning screens focused on actual business information.

This commit removes the sample data records from gantt because it looks weird with the total row and it isn't adding much to the user experience.

task-4009082

The appointment invitation screen no longer shows shortcode warnings before an appointment type is chosen. This avoids confusing users with warnings that are not relevant yet and makes the setup flow cleaner.

Purpose
========
- Unique Shortcode warning and shortcode format warning are visible even when there is no appointment type selected which seems weird.

Specification
==============
- This commit addresses the issue now, the warning will not be there when no appointment type is selected.

Task-4437892

Users can now delete a GST return period when an error occurs while it is being sent. This helps businesses recover from failed GST filing attempts without being blocked by a stuck period.

With this PR, user can delete the GST return period if an error is received
while the status is `sending`.

task-4471668

This update tightens internal validation so new records are created using the expected data format. It helps catch developer mistakes earlier, improving reliability across accounting, appointments, and recruitment workflows without changing day-to-day user behavior.

Planning publication now includes the final day chosen in a date range. This makes scheduling more intuitive by ensuring a range such as day 1 to day 10 includes day 10 when publishing.

This commit's purpose is to add the last day selected when the 'publish' button is used since it is not intuitive to miss the day 10 when a user select a date range from day 1 to day 10

The Studio chatter area is now easier to see when users hover over it in dark mode. This improves readability and makes form editing more comfortable for users working with dark themes.

SPECIFICATION:

Improves the visibility of the chatter in dark mode when hovering in studio.

Task-4574621