fix(tui): add top margin to prompt mode indicator

Author: shuv1337

packages/opencode/src/cli/cmd/tui/component/prompt/index.tsx

@@ -1116,7 +1116,7 @@ export function Prompt(props: PromptProps) {
               syntaxStyle={syntax()}
             />
             <Show when={tall()}>
-              <box flexDirection="row" flexShrink={0} gap={1}>
+              <box flexDirection="row" flexShrink={0} gap={1} marginTop={1}>
                 <text fg={highlight()}>
                   {store.mode === "shell" ? "Shell" : Locale.titlecase(local.agent.current().name)}{" "}
                 </text>