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)

browser_cli/__init__.py

@@ -308,9 +308,29 @@ class BrowserCLI:
             ]
         return [self._make_tab(t) for t in (self._cmd("tabs.list", {}) or [])]
 
-    def tabs_close(self, tab_id: int | None = None, *, inactive: bool = False, duplicates: bool = False) -> int:
-        """Close tab(s). Returns the number of tabs closed."""
-        result = self._cmd("tabs.close", {"tabId": tab_id, "inactive": inactive, "duplicates": duplicates})
+    def tabs_close(
+        self,
+        tab_id: int | None = None,
+        *,
+        tab_ids: Iterable[int | Tab] | None = None,
+        inactive: bool = False,
+        duplicates: bool = False,
+    ) -> int:
+        """Close tab(s). Returns the number of tabs closed.
+
+        Pass ``tab_ids`` to close many tabs in a single round-trip instead of
+        calling :meth:`close_tab` per tab. Accepts tab IDs or :class:`Tab`
+        objects. The extension throttles large batches automatically.
+        """
+        ids = None
+        if tab_ids is not None:
+            ids = [t.id if isinstance(t, Tab) else t for t in tab_ids]
+        result = self._cmd("tabs.close", {
+            "tabId": tab_id,
+            "tabIds": ids,
+            "inactive": inactive,
+            "duplicates": duplicates,
+        })
         return result.get("closed", 1) if isinstance(result, dict) else 1
 
     def tabs_move(