fix: open account browser maximized without Chrome first-run

Human open now uses start-maximized and no-first-run flags, and profile shortcuts share the same args plus the platform URL.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/test_browser_open.py

@@ -77,13 +77,42 @@ class TestCmdOpenDirectBrowser:
         assert payload["data"]["browser_exe"] == fake_exe
         assert spawned["cmd"][0] == fake_exe
         assert spawned["cmd"][1].startswith("--user-data-dir=")
-        assert spawned["cmd"][2] == "https://example.com"
+        assert "--start-maximized" in spawned["cmd"]
+        assert "--no-first-run" in spawned["cmd"]
+        assert "--no-default-browser-check" in spawned["cmd"]
+        assert "--disable-search-engine-choice-screen" in spawned["cmd"]
+        assert spawned["cmd"][-1] == "https://example.com"
+        assert "--enable-automation" not in spawned["cmd"]
         # must NOT spawn python / open_child_runner
         joined = " ".join(spawned["cmd"])
         assert "open_child_runner" not in joined
         assert "python" not in joined.lower()
 
 
+class TestHumanChromeLaunchArgs:
+    def test_flags_then_url(self, tmp_path):
+        from service.browser_service import HUMAN_CHROME_FLAGS, human_chrome_launch_args
+
+        profile = str(tmp_path / "prof")
+        args = human_chrome_launch_args(profile, "https://chat.deepseek.com")
+        assert args[0].startswith("--user-data-dir=")
+        for flag in HUMAN_CHROME_FLAGS:
+            assert flag in args
+        assert args[-1] == "https://chat.deepseek.com"
+        assert "--enable-automation" not in args
+
+    def test_shortcut_arguments_quote_profile_and_include_url(self, tmp_path):
+        from service.browser_service import human_chrome_shortcut_arguments
+
+        profile = tmp_path / "my prof"
+        profile.mkdir()
+        text = human_chrome_shortcut_arguments(str(profile), "https://example.com")
+        assert '--user-data-dir="' in text
+        assert "--start-maximized" in text
+        assert "--no-first-run" in text
+        assert text.endswith("https://example.com")
+
+
 class TestResolveChromiumChannel:
     """resolve_chromium_channel returns a channel string when browsers exist."""