feat(mcp): target DOM tools by tab

- Add server-side search filtering to the MCP tabs_list tool.
- Let MCP DOM query, click, and type tools operate on an explicit tab_id.
- Use tab-scoped DOM eval fallbacks when the SDK active-tab helpers are not enough.
- Cover tab filtering and tab-targeted DOM operations in MCP tests.
- Bump package and extension versions to 0.16.8 and refresh the lockfile.

tests/test_mcp.py

@@ -33,11 +33,14 @@ class FakeClient:
     self.nav = SimpleNamespace(to=self.navigate_to)
     self.page = SimpleNamespace(info=self.page_info)
     self.extract = SimpleNamespace(text=self.extract_text, markdown=self.extract_markdown)
-    self.dom = SimpleNamespace(query=self.dom_query, click=self.dom_click, type=self.dom_type)
+    self.dom = SimpleNamespace(query=self.dom_query, click=self.dom_click, type=self.dom_type, eval=self.dom_eval)
     self.instances.append(self)
 
   def tabs_list(self):
-    return [{"id": 7, "title": "Example", "url": "https://example.com"}]
+    return [
+      {"id": 7, "title": "Example", "url": "https://example.com"},
+      {"id": 9, "title": "Browser App", "url": "https://browser-host.example/app"},
+    ]
 
   def tabs_open(self, url, **kwargs):
     self.calls.append(("open", url, kwargs))
@@ -83,6 +86,12 @@ class FakeClient:
   def dom_type(self, selector, text):
     self.calls.append(("type", selector, text))
 
+  def dom_eval(self, code, tab_id=None):
+    self.calls.append(("eval", code, tab_id))
+    if "querySelectorAll" in code:
+      return [{"tag": "BUTTON", "text": "Buchen", "attrs": {"id": "buchen"}}]
+    return True
+
 @pytest.fixture(autouse=True)
 def clear_instances():
   FakeClient.instances.clear()
@@ -110,7 +119,10 @@ async def test_each_tool_call_constructs_a_fresh_targeted_client(client, monkeyp
   second = await client.call_tool("browser_page_info", {})
 
   assert first.structured_content == {
-    "result": [{"id": 7, "title": "Example", "url": "https://example.com"}]
+    "result": [
+      {"id": 7, "title": "Example", "url": "https://example.com"},
+      {"id": 9, "title": "Browser App", "url": "https://browser-host.example/app"},
+    ]
   }
   assert second.structured_content == {
     "title": "Example",
@@ -158,6 +170,37 @@ async def test_explicit_target_overrides_environment_pin(client, monkeypatch):
 
   assert FakeClient.instances[-1].target == ("main", None, None)
 
+@pytest.mark.anyio
+async def test_tabs_list_can_filter_large_tab_sets_server_side(client, monkeypatch):
+  monkeypatch.delenv("BROWSER_CLI_KEY", raising=False)
+
+  result = await client.call_tool("browser_tabs_list", {"search": "browser-host.example", "browser": "main"})
+
+  assert result.structured_content == {
+    "result": [{"id": 9, "title": "Browser App", "url": "https://browser-host.example/app"}]
+  }
+  assert FakeClient.instances[-1].target == ("main", None, None)
+
+@pytest.mark.anyio
+async def test_dom_tools_accept_explicit_tab_id(client):
+  queried = await client.call_tool("browser_dom_query", {"selector": "button", "tab_id": 9})
+  clicked = await client.call_tool("browser_dom_click", {"selector": "#buchen", "tab_id": 9})
+  typed = await client.call_tool("browser_dom_type", {"selector": "#name", "text": "Daniel", "tab_id": 9})
+
+  assert queried.structured_content == {
+    "result": [{"tag": "BUTTON", "text": "Buchen", "attrs": {"id": "buchen"}}]
+  }
+  assert clicked.structured_content == {
+    "title": "Example",
+    "url": "https://example.com",
+    "tab_id": 9,
+  }
+  assert typed.structured_content == {"typed": True}
+  assert FakeClient.instances[0].calls == [("eval", FakeClient.instances[0].calls[0][1], 9)]
+  assert FakeClient.instances[1].calls[0][0] == "eval"
+  assert FakeClient.instances[1].calls[1] == ("page_info", 9)
+  assert FakeClient.instances[2].calls[0][0] == "eval"
+
 @pytest.mark.anyio
 async def test_mutating_tools_use_sdk_and_return_fresh_state(client):
   opened = await client.call_tool("browser_tabs_open", {