fix(dashboard): use browser scrollback for chat wheel

tests/hermes_cli/test_web_server.py

@@ -2092,6 +2092,21 @@ class TestPtyWebSocket:
         q = {"token": tok, **params}
         return f"/api/pty?{urlencode(q)}"
 
+    def test_resolve_chat_argv_uses_dashboard_scroll_env(self, monkeypatch):
+        """Dashboard chat runs the TUI in browser-scrollback mode."""
+        import hermes_cli.main as main_mod
+
+        monkeypatch.setattr(
+            main_mod,
+            "_make_tui_argv",
+            lambda project_root, tui_dev=False: (["node", "dist/entry.js"], "/tmp/ui-tui"),
+        )
+
+        _argv, _cwd, env = self.ws_module._resolve_chat_argv()
+
+        assert env["HERMES_TUI_INLINE"] == "1"
+        assert env["HERMES_TUI_DISABLE_MOUSE"] == "1"
+
     def test_rejects_when_embedded_chat_disabled(self, monkeypatch):
         monkeypatch.setattr(self.ws_module, "_DASHBOARD_EMBEDDED_CHAT_ENABLED", False)
         from starlette.websockets import WebSocketDisconnect