feat(tabs): batch-close tabs by id list

Closing many tabs previously meant one IPC round-trip per tab
(tab.close() in a loop). Add a single batched path so callers can
close N tabs in one command, reusing the existing large-operation
throttle so the browser UI stays responsive.

- extension: tabs.close accepts tabIds: number[]; new branch feeds
  the array through processInBatches/chrome.tabs.remove
- sdk: tabs_close(tab_ids=...) takes tab IDs or Tab objects; the
  payload always carries "tabIds" (null when unused)
- tests: cover id-list and Tab-object batch close in test_api.py
- bump 0.10.3 -> 0.10.4 (pyproject.toml, manifest.json)

tests/test_api.py

@@ -305,7 +305,26 @@ class TestTabs:
         b.tabs_close(tab_id=10)
         mock_send.assert_called_once_with(
             "tabs.close",
-            {"tabId": 10, "inactive": False, "duplicates": False},
+            {"tabId": 10, "tabIds": None, "inactive": False, "duplicates": False},
+            profile=None, remote=None, key=None,
+        )
+
+    def test_tabs_close_by_ids(self, b, mock_send):
+        mock_send.return_value = {"closed": 3}
+        assert b.tabs_close(tab_ids=[10, 20, 30]) == 3
+        mock_send.assert_called_once_with(
+            "tabs.close",
+            {"tabId": None, "tabIds": [10, 20, 30], "inactive": False, "duplicates": False},
+            profile=None, remote=None, key=None,
+        )
+
+    def test_tabs_close_by_ids_accepts_tab_objects(self, b, mock_send):
+        tabs = [b._make_tab({**TAB_DATA, "id": 10}), b._make_tab({**TAB_DATA, "id": 20})]
+        mock_send.return_value = {"closed": 2}
+        assert b.tabs_close(tab_ids=tabs) == 2
+        mock_send.assert_called_once_with(
+            "tabs.close",
+            {"tabId": None, "tabIds": [10, 20], "inactive": False, "duplicates": False},
             profile=None, remote=None, key=None,
         )
 
@@ -446,8 +465,8 @@ class TestTabs:
             call("tabs.status", {"tabId": 10}, profile=None, remote=None, key=None),
             call("tabs.query", {"search": "Example"}, profile=None, remote=None, key=None),
             call("tabs.query", {"search": "Missing"}, profile=None, remote=None, key=None),
-            call("tabs.close", {"tabId": 10, "inactive": False, "duplicates": False}, profile=None, remote=None, key=None),
-            call("tabs.close", {"tabId": 10, "inactive": False, "duplicates": False}, profile=None, remote=None, key=None),
+            call("tabs.close", {"tabId": 10, "tabIds": None, "inactive": False, "duplicates": False}, profile=None, remote=None, key=None),
+            call("tabs.close", {"tabId": 10, "tabIds": None, "inactive": False, "duplicates": False}, profile=None, remote=None, key=None),
         ]
 
     def test_find_tabs_alias(self, b, mock_send):