Terminal: apply ESC delay; stop treating resize as C-g

set_escdelay is an ncurses function, not a macro, so the #ifdef guard
compiled it out and ESC waited the 1 s default. KEY_RESIZE was mapped
to Refresh, the C-g cancel handler, which cleared the mark and
cancelled open prompts (including swap recovery) on every resize.

Audit findings B1, B2.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015rcVQiiWyTzoNrsvLSaAfB

TerminalInputHandler.cc

@@ -165,9 +165,10 @@ map_key_to_command(const int ch,
 		out            = {true, CommandId::DeleteChar, "", 0};
 		return true;
 	case KEY_RESIZE:
-		k_prefix = false;
-		k_ctrl_pending = false;
-		out            = {true, CommandId::Refresh, "", 0};
+		// TerminalFrontend::Step picks up the new size before the next draw.
+		// Refresh is the C-g cancel handler, so issuing it here would clear the
+		// mark and cancel open prompts on every window resize.
+		out.hasCommand = false;
 		return true;
 	default:
 		break;