Harden i3 context capture

src/context.py

@@ -44,19 +44,26 @@ class I3Provider(ContextProvider):
 
     def capture(self) -> Context:
         node = self._focused()
-        props = node.window_properties or {}
+        props = getattr(node, "window_properties", None) or {}
         return Context(
             window_id=node.id,
-            app_id=node.app_id or "",
+            app_id=getattr(node, "app_id", None) or "",
             klass=props.get("class") or "",
             instance=props.get("instance") or "",
-            title=node.name or "",
+            title=getattr(node, "name", None) or "",
         )
 
     def is_same_focus(self, ctx: Context) -> bool:
         node = self._focused()
         return node.id == ctx.window_id
 
+    def focus_window(self, window_id: int) -> bool:
+        node = self.i3.get_tree().find_by_id(window_id)
+        if node is None:
+            return False
+        node.command("focus")
+        return True
+
 
 def _match_text(val: str, needle: str | None) -> bool:
     if not needle: