fix: unify subagent model display with footer formatting (#863)

src/tests/cli/subagentDisplay.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, test } from "bun:test";
+import { getSubagentModelDisplay } from "../../cli/helpers/subagentDisplay";
+
+describe("getSubagentModelDisplay", () => {
+  test("formats known model IDs using short labels", () => {
+    const display = getSubagentModelDisplay("haiku");
+    expect(display).toEqual({
+      label: "Haiku 4.5",
+      isByokProvider: false,
+      isOpenAICodexProvider: false,
+    });
+  });
+
+  test("formats non-BYOK handles using short labels", () => {
+    const display = getSubagentModelDisplay(
+      "anthropic/claude-haiku-4-5-20251001",
+    );
+    expect(display).toEqual({
+      label: "Haiku 4.5",
+      isByokProvider: false,
+      isOpenAICodexProvider: false,
+    });
+  });
+
+  test("marks lc-* handles as BYOK", () => {
+    const display = getSubagentModelDisplay(
+      "lc-anthropic/claude-haiku-4-5-20251001",
+    );
+    expect(display).toEqual({
+      label: "claude-haiku-4-5-20251001",
+      isByokProvider: true,
+      isOpenAICodexProvider: false,
+    });
+  });
+
+  test("marks chatgpt-plus-pro handles as BYOK", () => {
+    const display = getSubagentModelDisplay("chatgpt-plus-pro/gpt-5.2-codex");
+    expect(display).toEqual({
+      label: "GPT-5.2 Codex",
+      isByokProvider: true,
+      isOpenAICodexProvider: true,
+    });
+  });
+});