Summary

This updates the Memory Channels dialog to support user-controlled sorting for the most useful fields.

What changed

• add clickable header sorting for Name, Frequency and Mode
• make the default sort on open Frequency
• keep the active sort when the table repopulates from live memory updates
• sort numerically instead of lexicographically
• widen the Frequency column slightly so the sort indicator remains visible

Behavior

Before this change, the dialog simply reflected the underlying memory index order from the radio cache.

With this change:

• the dialog opens with Frequency sorted by ascending
• clicking Name, Frequency and Mode toggles ascending and descending order
• the underlying radio memory cache order is unchanged

Validation

• implemented and tested in a sibling worktree on macOS
• confirmed the default sort and header toggling behavior in the running app