Add cmd-y binding for agent::Keep in agent diff review (#50656)

Mikayla Maki created 

Release Notes:

- Added `cmd-y` keybinding for accepting changes in the agent diff
review, matching the git diff review shortcut.

Change summary

assets/keymaps/default-linux.json   | 2 ++
assets/keymaps/default-macos.json   | 2 ++
assets/keymaps/default-windows.json | 2 ++
3 files changed, 6 insertions(+)

Detailed changes

assets/keymaps/default-linux.json 🔗 

@@ -204,6 +204,7 @@
   {
     "context": "Editor && editor_agent_diff",
     "bindings": {
+      "alt-y": "agent::Keep",
       "ctrl-alt-y": "agent::Keep",
       "ctrl-alt-z": "agent::Reject",
       "shift-alt-y": "agent::KeepAll",
@@ -214,6 +215,7 @@
   {
     "context": "AgentDiff",
     "bindings": {
+      "alt-y": "agent::Keep",
       "ctrl-alt-y": "agent::Keep",
       "ctrl-alt-z": "agent::Reject",
       "shift-alt-y": "agent::KeepAll",

assets/keymaps/default-macos.json 🔗 

@@ -242,6 +242,7 @@
     "context": "AgentDiff",
     "use_key_equivalents": true,
     "bindings": {
+      "cmd-y": "agent::Keep",
       "cmd-alt-y": "agent::Keep",
       "cmd-alt-z": "agent::Reject",
       "shift-alt-y": "agent::KeepAll",
@@ -252,6 +253,7 @@
     "context": "Editor && editor_agent_diff",
     "use_key_equivalents": true,
     "bindings": {
+      "cmd-y": "agent::Keep",
       "cmd-alt-y": "agent::Keep",
       "cmd-alt-z": "agent::Reject",
       "shift-alt-y": "agent::KeepAll",

assets/keymaps/default-windows.json 🔗 

@@ -203,6 +203,7 @@
     "context": "Editor && editor_agent_diff",
     "use_key_equivalents": true,
     "bindings": {
+      "alt-y": "agent::Keep",
       "ctrl-alt-y": "agent::Keep",
       "ctrl-alt-z": "agent::Reject",
       "shift-alt-y": "agent::KeepAll",
@@ -214,6 +215,7 @@
     "context": "AgentDiff",
     "use_key_equivalents": true,
     "bindings": {
+      "alt-y": "agent::Keep",
       "ctrl-alt-y": "agent::Keep",
       "ctrl-alt-z": "agent::Reject",
       "shift-alt-y": "agent::KeepAll",