feat(tui) - /copy (#12613)

# /copy!

/copy allows you to copy the latest **complete** message from Codex on
the TUI.

codex-rs/tui/src/slash_command.rs

@@ -33,6 +33,7 @@ pub enum SlashCommand {
     Agent,
     // Undo,
     Diff,
+    Copy,
     Mention,
     Status,
     DebugConfig,
@@ -74,6 +75,7 @@ impl SlashCommand {
             // SlashCommand::Undo => "ask Codex to undo a turn",
             SlashCommand::Quit | SlashCommand::Exit => "exit Codex",
             SlashCommand::Diff => "show git diff (including untracked files)",
+            SlashCommand::Copy => "copy the latest Codex output to your clipboard",
             SlashCommand::Mention => "mention a file",
             SlashCommand::Skills => "use skills to improve how Codex performs specific tasks",
             SlashCommand::Status => "show current session configuration and token usage",
@@ -145,6 +147,7 @@ impl SlashCommand {
             | SlashCommand::MemoryDrop
             | SlashCommand::MemoryUpdate => false,
             SlashCommand::Diff
+            | SlashCommand::Copy
             | SlashCommand::Rename
             | SlashCommand::Mention
             | SlashCommand::Skills
@@ -170,6 +173,7 @@ impl SlashCommand {
     fn is_visible(self) -> bool {
         match self {
             SlashCommand::SandboxReadRoot => cfg!(target_os = "windows"),
+            SlashCommand::Copy => !cfg!(target_os = "android"),
             SlashCommand::Rollout | SlashCommand::TestApproval => cfg!(debug_assertions),
             _ => true,
         }