copy Omicron's sort order for mock API items

[charliepark]

This PR copies the Omicron API's sorting in the mock API, so Console results more accurately reflect what a user would see on an actual rack.

Closes #2776

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Changes Made

1. Updated mock-api/msw/util.ts

• Added a sortItems() function that implements sorting for all sort modes:
  • name_ascending / name_descending - sorts alphabetically by name
  • id_ascending - sorts lexicographically by ID (UUID)
  • time_and_id_ascending / time_and_id_descending - sorts by timestamp, then by ID
• Updated the paginated() function to:
  • Accept a sortBy parameter in the query options
  • Apply default sorting matching Omicron's behavior:
    • name_ascending for items with a name field (most common)
    • id_ascending for items without a name field
  • Sort items before paginating

2. Updated mock-api/msw/util.spec.ts

• Fixed the pagination test to expect lexicographically sorted results, matching how UUIDs are actually compared in Rust

Key Findings from Omicron Analysis

Based on the Omicron source code (https://github.com/uuid-rs/uuid):

• UUIDs in Rust use lexicographic byte-by-byte comparison because the Ord trait is derived for Uuid(Bytes), which wraps a [u8; 16] array
• Arrays in Rust compare element-by-element from left to right
• This means my implementation using localeCompare() in JavaScript correctly matches Omicron's UUID sorting behavior

The mock API now properly sorts results by default, matching Omicron's pagination behavior where:

• Most endpoints default to name_ascending (alphabetical by name)
• Endpoints without names default to id_ascending (lexicographic by UUID)
• Time-based sorting is only used when explicitly requested

Sources:

• https://docs.rs/uuid/latest/uuid/struct.Uuid.html
• https://github.com/uuid-rs/uuid
• https://github.com/oxidecomputer/omicron/blob/cf38148/common/src/api/external/http_pagination.rs

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Project	Deployment	Actions	Updated (UTC)
console	Ready	Preview	Feb 6, 2026 9:08pm

[charliepark]

Can't say I love this, but I think this is just a quirk of the names we've given them and lexicographical ordering.