Edit board: template edit mask

[SelinaBuff]

Description:

Currently, there is no functionality to edit existing boards from the History page. To allow board owners to modify their boards without having to recreate them, we need to implement a new edit workflow.
This feature requires building an integration between the History page and the Template Editor mask: when a board owner triggers the edit action, the editor needs to open pre-populated with the board's data, adapt its UI elements to an "edit/save" state instead of "create", and handle the update and redirect flow back to the History page.

User Story:

As a board wwner,
I want to edit my boards directly from the History page using the template editor,
so that I can easily update board details (like title, description, and columns) without having to recreate the board from scratch.

Acceptance Criteria:

• Accessing the Editor:

• A board owner can click on the 3-dot menu of a board on the History page

• Clicking the pencil icon (Edit) within this menu opens the Template Editor mask

• Permissions:
  The different roles have the following functions:

• Owner: Every function is available

• Moderator: "Delete" is not available

• Participant: "Delete" and "edit" is not available
  (Note: These options must either be completely hidden or removed from the 3-dot menu for that specific board)

• Pre-Populated Fields:
  When the Template Editor opens for an existing board, all fields must be pre-filled with the board's current data:

• Board Title

• Description

• Columns (including column titles, colors, and current order)

• UI Adjustments (Primary Button):
  Since the user is editing an existing board rather than creating a new one, the primary button on the right side must change as follows:

• Text changes from "Create template" to "Save"

• Icon changes from plus-icon (+) to checkmark-icon (✓)

• Save and Redirect:

• Clicking the updated "Save" button saves the changes

• Upon saving, the user is automatically redirected back to the History page

• The updated details of the edited board must be immediately visible on the History page