test: expand browser command coverage

- Add mocked Click CLI tests across DOM, cookies, page, storage, perf, navigation, tabs, groups, sessions, and windows commands.
- Cover integration paths for cookies, page info, performance profiles, and web storage commands.
- Extend DOM integration coverage for eval, scrolling, waiting, focus, hover, typing, selection, keyboard, and checkbox interactions.
- Add native host unit coverage for message framing, socket helpers, paging guards, timeouts, and profile alias resolution.

tests/test_perf.py

@@ -0,0 +1,72 @@
+"""Integration tests for perf.* commands — require a live browser."""
+import time
+
+_VALID_PROFILES = {"auto", "normal", "gentle", "ultra"}
+
+def test_perf_status_returns_profile_field(browser):
+    """perf.status returns a dict with a performanceProfile field."""
+    result = browser("perf.status")
+    assert isinstance(result, dict)
+    assert "performanceProfile" in result
+    assert result["performanceProfile"] in _VALID_PROFILES
+
+def test_perf_status_has_throttle(browser):
+    """perf.status includes a throttle dict with batchSize and pauseMs."""
+    result = browser("perf.status")
+    throttle = result.get("throttle")
+    assert isinstance(throttle, dict)
+    assert "batchSize" in throttle
+    assert "pauseMs" in throttle
+    assert isinstance(throttle["batchSize"], int)
+    assert isinstance(throttle["pauseMs"], int)
+    assert throttle["batchSize"] > 0
+    assert throttle["pauseMs"] >= 0
+
+def test_perf_status_has_audible_field(browser):
+    """perf.status contains an audible boolean."""
+    result = browser("perf.status")
+    assert "audible" in result
+    assert isinstance(result["audible"], bool)
+
+def test_perf_status_has_jobs_field(browser):
+    """perf.status contains a jobs list (may be empty)."""
+    result = browser("perf.status")
+    assert "jobs" in result
+    assert isinstance(result["jobs"], list)
+
+def test_perf_set_profile_returns_profile(browser):
+    """perf.set_profile responds with the applied profile."""
+    # Save current
+    current = browser("perf.status").get("performanceProfile", "auto")
+    target = "normal" if current != "normal" else "gentle"
+
+    try:
+        result = browser("perf.set_profile", {"profile": target})
+        assert isinstance(result, dict)
+        assert result.get("performanceProfile") == target
+    finally:
+        browser("perf.set_profile", {"profile": current})
+
+def test_perf_set_profile_updates_status(browser):
+    """After set_profile the status command reflects the new profile."""
+    current = browser("perf.status").get("performanceProfile", "auto")
+    target = "gentle" if current != "gentle" else "normal"
+
+    try:
+        browser("perf.set_profile", {"profile": target})
+        status = browser("perf.status")
+        assert status.get("performanceProfile") == target
+    finally:
+        browser("perf.set_profile", {"profile": current})
+
+def test_perf_profile_roundtrip_all_values(browser):
+    """Every valid profile can be set and read back without error."""
+    original = browser("perf.status").get("performanceProfile", "auto")
+    try:
+        for profile in sorted(_VALID_PROFILES):
+            result = browser("perf.set_profile", {"profile": profile})
+            assert result.get("performanceProfile") == profile
+            status = browser("perf.status")
+            assert status.get("performanceProfile") == profile
+    finally:
+        browser("perf.set_profile", {"profile": original})