fix: preserve selector text input and close on escape

src/main.rs

@@ -51,9 +51,9 @@ Diff: :diff (Normal); choose Before then After; Working checkout After edits liv
       Before and historical/remote After stay read-only; Tab/Shift+Tab categories/Normal focus
       All text panes use native motions, selections and copy; read-only panes reject edits/saves
       Switching Before/After preserves the aligned cursor row and display column
-      Type to search IDs/refs; navigation skips omitted lines without expanding excerpts
+      Selector queries own printable keys, including :; text navigation skips omitted lines
       Normal [/] explicitly expands context; Insert brackets remain literal text
-      :diff.close exits explicitly; Esc cancels modes/prompts/filtering without closing the diff
+      Esc closes Before/After selectors; :diff.close exits an opened comparison explicitly
       Remote refs/history load into temporary comparison repos without changing active refs/checkout
       Changed files: normal picker/explorer bindings, Ctrl+w close; A/M/D/R status and rename paths