change that tab open change url inplace and get active tab from window id

browser_cli/__init__.py

@@ -117,6 +117,10 @@ class BrowserCLI:
     def focus_url(self, pattern: str) -> None:
         self._cmd("navigate.focus", {"pattern": pattern})
 
+    def navigate_tab(self, tab_id: int, url: str) -> None:
+        """Navigate a specific tab to *url*."""
+        self._cmd("navigate.to", {"tabId": tab_id, "url": url})
+
     # ── Search ────────────────────────────────────────────────────────────
 
     def search(
@@ -168,6 +172,13 @@ class BrowserCLI:
         """Switch browser focus to a tab by ID."""
         self._cmd("tabs.active", {"tabId": tab_id})
 
+    def window_active_tab(self, window_id: int) -> Tab:
+        """Return active tab for a specific browser window."""
+        data = self._cmd("tabs.active_in_window", {"windowId": window_id})
+        if not isinstance(data, dict) or "id" not in data:
+            raise RuntimeError(f"No active tab found for window {window_id}")
+        return self._make_tab(data)
+
     def tabs_filter(self, pattern_or_filter: str | Callable[[Tab], bool] | Callable[[list[Tab]], Iterable[Tab]]) -> list[Tab]:
         """Return tabs filtered by pattern or a Python callable."""
         if isinstance(pattern_or_filter, str):