feat: controlBrowser tool — human-operable on-screen Chrome

Adds a general browser-control tool (navigate to any site, list/open/close/
switch tabs, close popups, click, type, scroll, screenshot) for the Go-Live
Chrome, on top of the existing CDP + xdotool human-input layer (visible
cursor, char-by-char typing). Closes the gap where "open Naver" had no tool
and the model confabulated success. Also adds a system-prompt rule against
claiming actions no tool actually performed.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/jarvis/tools/registry.py

@@ -21,6 +21,7 @@ from .builtin.weather import WeatherTool
 from .builtin.stop import StopTool
 from .builtin.tool_search import ToolSearchTool
 from .builtin.browse_and_play import BrowseAndPlayTool
+from .builtin.control_browser import ControlBrowserTool
 from .builtin.set_broadcast import SetBroadcastTool
 from .types import ToolExecutionResult
 from ..config import Settings
@@ -42,6 +43,7 @@ BUILTIN_TOOLS = {
     "stop": StopTool(),
     "toolSearchTool": ToolSearchTool(),
     "browseAndPlay": BrowseAndPlayTool(),
+    "controlBrowser": ControlBrowserTool(),
     "setBroadcast": SetBroadcastTool(),
 }