---
id: TASK-027
title: 'TUI: Sort process table by memory with m key'
status: To Do
assignee: []
created_date: '2026-06-12 04:21'
labels:
  - tui
  - enhancement
dependencies: []
priority: low
ordinal: 27000
---

## Description

<!-- SECTION:DESCRIPTION:BEGIN -->
The process table on the System page is always sorted by CPU%. Add a toggle so pressing `m` when on the System page (or when the process table is focused) switches sort between CPU% (default) and RSS memory.

Implementation:
- Add `_proc_sort: str = "cpu"` to `DashboardApp` (or a `SystemPage` widget if pages are refactored)
- Bind `m` scoped to the system page: `action_toggle_proc_sort()`
- `_apply_system()` sorts `procs` by the current sort field before adding rows
- Process table border title reflects active sort: "Processes  [CPU]" or "Processes  [Mem]"
- `m` key hint visible in the table border or `Footer`
<!-- SECTION:DESCRIPTION:END -->

## Acceptance Criteria
<!-- AC:BEGIN -->
- [ ] #1 m toggles process table sort between CPU% and RSS memory
- [ ] #2 Current sort mode visible in table border title
- [ ] #3 Sort persists until toggled again or page changes
- [ ] #4 Table re-sorts immediately on keypress without waiting for next sample
<!-- AC:END -->