fix(config): apply defaults to perplexity UI

test/config-command.test.ts

@@ -0,0 +1,57 @@
+import { afterEach, beforeEach, describe, expect, test } from "bun:test";
+import { mkdtemp, readFile, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import { registerPerplexityConfigCommand } from "../src/commands/config.js";
+import { loadConfig, saveConfig } from "../src/config.js";
+
+let tempDir: string;
+let configPath: string;
+
+beforeEach(async () => {
+  tempDir = await mkdtemp(join(tmpdir(), "pi-perplexity-command-test-"));
+  configPath = join(tempDir, "config.json");
+});
+
+afterEach(async () => {
+  await rm(tempDir, { recursive: true, force: true });
+});
+
+describe("perplexity-config command", () => {
+  test("writes selected config to disk", async () => {
+    let handler: ((args: string, ctx: any) => Promise<void>) | undefined;
+
+    registerPerplexityConfigCommand(
+      {
+        registerCommand(name: string, command: { handler: (args: string, ctx: any) => Promise<void> }) {
+          expect(name).toBe("perplexity-config");
+          handler = command.handler;
+        },
+      } as any,
+      {
+        getConfigPath: () => configPath,
+        loadConfig: () => loadConfig(configPath),
+        saveConfig: (config) => saveConfig(config, configPath),
+      },
+    );
+
+    expect(handler).toBeDefined();
+
+    const notifications: Array<{ message: string; level: string }> = [];
+    await handler!("", {
+      ui: {
+        select: async () => "GPT-5.4 (gpt54)",
+        confirm: async () => false,
+        notify: (message: string, level: string) => notifications.push({ message, level }),
+      },
+    });
+
+    const raw = await readFile(configPath, "utf8");
+    expect(JSON.parse(raw)).toEqual({ model: "gpt54", incognito: false });
+    expect(notifications).toContainEqual({
+      message: "Perplexity config saved:\nModel: gpt54 (GPT-5.4)\nIncognito: false",
+      level: "info",
+    });
+  });
+});