feat: improve remote browser tree routing

- Allow remote host aliases passed via --browser to fan out for read-only
  multi-browser SDK paths while preserving strict routing for mutating commands.
- Add remote host grouping and scoped profile labels to tabs tree output so
  global views avoid repeated host prefixes.
- Carry browser family metadata through remote targets, tabs, and groups and
  style tree browser labels by family.
- Split CLI rendering helpers into a typed rendering package with dedicated
  common, label, tabs-tree, and windows-tree modules.
- Bump browser-cli and extension versions to 0.15.5.
- Cover the new routing and rendering behavior with unit and CLI tests.

browser_cli/commands/rendering/windows_tree.py

@@ -0,0 +1,38 @@
+"""Windows tree renderer."""
+from __future__ import annotations
+
+from collections.abc import Iterable, Mapping
+
+from rich.console import Console
+from rich.tree import Tree
+
+from browser_cli.commands.rendering.common import Row, int_value, item_value, text_value, tree_title_limit, tree_url_limit
+from browser_cli.commands.rendering.labels import tab_tree_label
+
+WindowRow = Mapping[str, object]
+
+def build_windows_tree(windows: Iterable[WindowRow], tabs: Iterable[Row], *, console: Console) -> Tree:
+  """Build a window → tab tree from window and tab responses."""
+  windows = list(windows)
+  tabs = list(tabs)
+  title_limit = tree_title_limit(console=console, show_browser=any("browser" in w for w in windows), show_urls=True)
+  url_limit = tree_url_limit(title_limit, console=console)
+  root = Tree("[bold]Windows[/bold]")
+  for window in sorted(windows, key=lambda item: (text_value(item.get("browser")), int_value(item.get("id")))):
+    window_id = int_value(window.get("id"))
+    label = f"Window {window_id}"
+    alias = text_value(window.get("alias"))
+    browser = text_value(window.get("browser"))
+    if alias:
+      label += f" ({alias})"
+    if browser:
+      label = f"{browser}: " + label
+    node = root.add(label)
+    window_tabs = [
+      tab for tab in tabs
+      if int_value(item_value(tab, "window_id", item_value(tab, "windowId"))) == window_id
+      and (not browser or text_value(item_value(tab, "browser")) == browser)
+    ]
+    for tab in sorted(window_tabs, key=lambda item: int_value(item_value(item, "index", 0))):
+      node.add(tab_tree_label(tab, title_limit=title_limit, show_urls=True, url_limit=url_limit))
+  return root