feat(read): target any tab for page info and extraction

- Add --tab option to all extract commands and page info
- Thread tab_id through the SDK extract and page namespaces
- Route page.info with a tab_id to tabs.status for cross-tab metadata
- Accept tab_id in the MCP page_info, extract_text, extract_markdown tools
- Forward tabId in the extension page.info and extract.html handlers
- Keep the active tab as default when no tab is given

- Cover tab-scoped reads in API, CLI, and MCP tests
- Bump package and extension version to 0.16.7
- Refresh uv.lock with current dependency versions

tests/test_mcp.py

@@ -62,14 +62,17 @@ class FakeClient:
   def navigate_to(self, tab_id, url):
     self.calls.append(("navigate", tab_id, url))
 
-  def page_info(self):
-    return {"title": "Example", "url": "https://example.com"}
+  def page_info(self, tab_id=None):
+    self.calls.append(("page_info", tab_id))
+    return {"title": "Example", "url": "https://example.com", "tab_id": tab_id}
 
-  def extract_text(self):
+  def extract_text(self, tab_id=None):
+    self.calls.append(("extract_text", tab_id))
     return "Page text"
 
-  def extract_markdown(self, selector=None):
-    return f"# Page {selector or ''}".rstrip()
+  def extract_markdown(self, selector=None, tab_id=None):
+    self.calls.append(("extract_markdown", selector, tab_id))
+    return f"# Page {selector or ''} {tab_id or ''}".rstrip()
 
   def dom_query(self, selector):
     return [{"tag": "button", "selector": selector}]
@@ -112,6 +115,7 @@ async def test_each_tool_call_constructs_a_fresh_targeted_client(client, monkeyp
   assert second.structured_content == {
     "title": "Example",
     "url": "https://example.com",
+    "tab_id": None,
   }
   assert len(FakeClient.instances) == 2
   assert FakeClient.instances[0].target == ("work", "browser-host.example:443", "agent")
@@ -195,6 +199,23 @@ async def test_tab_tools_default_to_the_active_tab(client):
   ]
   assert FakeClient.instances[1].calls == [("active",), ("close", 7)]
 
+@pytest.mark.anyio
+async def test_read_tools_accept_explicit_tab_id(client):
+  info = await client.call_tool("browser_page_info", {"tab_id": 42})
+  text = await client.call_tool("browser_extract_text", {"tab_id": 42})
+  markdown = await client.call_tool("browser_extract_markdown", {"selector": "main", "tab_id": 42})
+
+  assert info.structured_content == {
+    "id": 42,
+    "title": "Navigated",
+    "url": "https://example.com/next",
+  }
+  assert text.content[0].text == "Page text"
+  assert markdown.content[0].text == "# Page main 42"
+  assert FakeClient.instances[0].calls == [("status", 42)]
+  assert FakeClient.instances[1].calls == [("extract_text", 42)]
+  assert FakeClient.instances[2].calls == [("extract_markdown", "main", 42)]
+
 @pytest.mark.anyio
 async def test_screenshot_returns_image_content(client):
   result = await client.call_tool("browser_screenshot", {"tab_id": 7, "format": "png"})