feat: toggle diff explorer and show file change indicators

docs/editing.md

@@ -211,6 +211,10 @@ Remote references such as `some-bookmark@origin` appear from remote advertisemen
 
 The read-only comparison has Before on the left, After on the right, and the changed-file explorer **docked on the right**. The explorer reuses the normal compact directory tree, filtering, and configurable `tree`/`selection` navigation. Its catalog contains only changed paths, including removed and historical files; it does not scan the working directory. Use h/j/k/l or control/arrow navigation, Enter to toggle a folder or open a file, `i` to filter, Ctrl+u to clear, and Ctrl+t to switch Tree/List. Opening a file focuses Before.
 
+**Ctrl+e** hides/shows the explorer in the diff view. Hiding reclaims its entire width for the split panes without losing the filter, selected row, folder expansion, displayed file, or pane scroll offsets. Hiding from Files moves focus to Before; showing restores Files focus. While hidden, Tab/Shift+Tab cycles only between Before and After. Ctrl+e is a reserved diff-view control and takes precedence over tree/selection remaps.
+
+File rows show colored **A** (added, green), **M** (modified, yellow), **D** (removed, red), or **R** (renamed, cyan) markers in Tree and List views, including filtered results. Rename rows show the new name followed by `← old/path`; directories have no file-status marker. Ordinary file exploration remains unannotated.
+
 Added/deleted rows are aligned with blank counterparts. Tab/Shift+Tab cycles focus between Files, Before, and After. In text panes, Up/Down or Ctrl+j/k scrolls both panes together; Left/Right or Ctrl+h/l scrolls the focused pane horizontally. Home/End goes to the first/last tree row or aligned text row. Wheel input over a text pane scrolls both panes; over Files it navigates visible tree rows without opening them. Esc first leaves filtering when the tree is focused; otherwise it closes the diff and preserves the editor's buffers, cursors, unsaved text, and undo history. Typing and pasted text cannot edit either snapshot.
 
 Binary data, missing final newlines, permission/type changes, symlink targets, and submodule pointers have explicit notices. Symlinks are not followed and submodule contents are not traversed. jj conflicts use jj's file-content projection and carry conflict notices; ordinary files remain readable. Identical-content moves are shown as renames; modified moves appear as an added and removed file.