feat(tui): add diff viewer keybind (#33365)

packages/tui/src/config/keybind.ts

@@ -57,6 +57,7 @@ export const Definitions = {
   command_list: keybind("ctrl+p", "List available commands"),
   help_show: keybind("none", "Open help dialog"),
   docs_open: keybind("none", "Open documentation"),
+  diff_open: keybind("none", "Open diff viewer"),
   diff_close: keybind("escape,q", "Close diff viewer"),
   diff_toggle: keybind("enter,space", "Toggle diff viewer item"),
   diff_expand: keybind("right", "Expand diff viewer item"),
@@ -264,6 +265,7 @@ export const CommandMap = {
   command_list: "command.palette.show",
   help_show: "help.show",
   docs_open: "docs.open",
+  diff_open: "diff.open",
   diff_close: "diff.close",
   diff_toggle: "diff.toggle",
   diff_expand: "diff.expand",