fix: remove redundant changed-file explorer legend

TODO.md

@@ -3,7 +3,7 @@
 - [x] buffer ux improvement: add toggleable word wrap (no keybinding by default).
 - [x] add panes/splits: split current pane above/below (`_`) or left/right (`|`) in Normal mode; navigate panes with Option/Alt+h/j/k/l.
     - shared split layout and directional focus with diff views; independent pane views, shared buffers, and guarded close/force-close actions.
-- [ ] remove diff viewer's file explorer's `A added M modified...` explanation - it's standard and the explanation doesn't fit in the pane, so it can go.
+- [x] remove diff viewer's file explorer's `A added M modified...` explanation - it's standard and the explanation doesn't fit in the pane, so it can go.
 - [ ] add tabs: tab support, editor action to open a buffer in a new tab, default tab navigation is `ctrl+option+h/l`, close tab action.
 - [ ] diff view: add character-wise change highlight (enabled by default).
 - [ ] diff view: lsp actions should act as they normally would. if an lsp action would open another file, then the file should be opened in another tab outside the diff view - if the referenced file/symbol is part of the changes in the diff, it should just be opened in the diff view.

src/tui.rs

@@ -3550,10 +3550,8 @@ fn draw_file_list(
             ));
         }
     }
-    let help = if changed_files.is_some() {
-        "A added · M modified · D deleted · R renamed · ^E hide".into()
-    } else if picker.focused {
-        let controls = if picker.root.as_os_str().is_empty() {
+    let help = if picker.focused {
+        let controls = if changed_files.is_some() {
             if browsing {
                 "Enter · i filter · Esc close · Tab panes · ^T view"
             } else {
@@ -3571,7 +3569,7 @@ fn draw_file_list(
             }
         };
         format!("^U clear · {navigation_hint} · {controls}")
-    } else if picker.root.as_os_str().is_empty() {
+    } else if changed_files.is_some() {
         "Editor focus · Tab to browse changed files".into()
     } else {
         "Editor focus · invoke explorer to browse".into()