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Joanna Jung - Project Portfolio Page

Implemented the UpdateCommand class, which allows users to modify one or more fields of an existing internship entry without re-entering the entire record.
Supported updates to any combination of fields: company/, role/, deadline/, pay/, and status/.
Integrated validation through the ArgumentParser to handle parsing, 1-based to 0-based index conversion, and input format checking.
Ensured error handling through InternityException for invalid formats, indices, or missing fields.
Added static calls to InternshipList.updateX(...) for each non-null field
Added unit tests to verify that the command correctly updates internships, throws appropriate exceptions for invalid input, and integrates properly with ArgumentParser and InternshipList.

Refactored the existing ListCommand and InternshipList interaction to resolve the issue where the internship list could not revert to its original order after sorting.
Modified the InternshipList.sortInternships() method to create a separate ArrayList copy instead of sorting the internal list directly, ensuring sorting is temporary and non-persistent.
Updated listAll() to iterate through this temporary view when the user specifies list sort/asc or list sort/desc, leaving the original list unchanged.
Verified that the default list command still displays internships in the order they were added.
Added unit tests confirming that sorting only affects the current view, and that subsequent list commands correctly revert to the original unsorted order.

Developer Guide:
- Worked on the section for the UpdateCommand, covering:
  - Command functionality, step-by-step execution flow, and field validation logic
  - Example command formats and detailed error-handling explanations
  - UML diagrams:
    - Update Command Sequence Diagram
    - Update Feature Class Diagram
- Conducted manual testing to confirm that command behavior matched the described documentation scenarios.
- Updated the section for the ListCommand to match the updated implementation for sorting.

Reviewed PRs