Activates the v1.27-deferred fold/expand feature. The tree
view from v1.27 is now interactive: pressing Space on a
parent row toggles whether its descendants are visible.
- New App.folded: BTreeSet<u32> (PIDs whose subtrees are
collapsed; stable iteration order for future debug dumps)
- New App.process_cursor: usize (Process-tab cursor; distinct
from table_state which tracks the Per-CPU tab)
- New process::apply_fold(processes, folded) -> Vec<ProcessInfo>
Hides descendants of any PID in . The fold target
itself stays visible. Roots are never hidden. Cycles
tolerated (sort_tree's visited set prevents infinite loops).
- Fold indicator in tree_prefix: \u25b6 for folded, \u25bc for
expanded, no marker for leaf rows
- Space keypress (in tree mode only) toggles fold on the
cursor's selected PID; flashes 'folded PID N' or
'unfolded PID N' (or 'has no children to fold' for leaves)
- sort_tree kept pure; apply_fold is a separate post-step
applied in app.rs after sort_tree
Test count 107 -> 111 (+4):
- apply_fold_empty_set_is_identity
- apply_fold_hides_descendants_of_folded_root (folds root)
- apply_fold_hides_subtree_of_folded_child (folds middle;
sibling of folded node stays visible)
- apply_fold_unfold_restores (toggle off)
Redox stripped binary: 4,180,840 bytes (-8 KiB from v1.28;
linker dedup'd some shared code).
Compile warnings: 55 (unchanged).
Notes:
- No cursor navigation yet (j/k, down/up). Default cursor
is row 0, so user can fold the first process but cannot
yet move down. Defer to v1.30.
- No persist of fold state across redbear-power restarts.
Would require a config file. Defer.
Docs: local/docs/redbear-power-improvement-plan.md \xC2\xA753
vasilito
988e8b29bb