Function preview_task_edit 

pub fn preview_task_edit(
    queue: &QueueFile,
    done: Option<&QueueFile>,
    task_id: &str,
    key: TaskEditKey,
    input: &str,
    now_rfc3339: &str,
    id_prefix: &str,
    id_width: usize,
    max_dependency_depth: u8,
) -> Result<TaskEditPreview>

Preview task edit changes without applying them.

Clones the queue, applies the edit to the clone, validates the result, and returns a preview describing what would change.

Arguments

• queue - The queue file containing the task to edit
• done - Optional done file for validation
• task_id - ID of the task to edit
• key - Field to edit
• input - New value for the field
• now_rfc3339 - Current timestamp for updated_at
• id_prefix - Task ID prefix for validation
• id_width - Task ID width for validation
• max_dependency_depth - Maximum dependency depth for validation

Returns

A TaskEditPreview describing the changes that would be made.