* feat(cutover): every entry point opens the workspace; legacy pages stay reachable
The top-bar PM button, the nodes' Web UI buttons and /prompt_manager/web now
open the workspace Library. Overview's cards open their native pages. The legacy
pages stay at their URLs, with no route changed.
Classic Web UI no longer navigates the canvas away when a popup is blocked; it
shows a notification, as the focused node does.
Closes#525
* feat(cutover): link the legacy pages from System and when the workspace fails to load
System's Overview section ends with one small Legacy pages line (D165). If a
workspace module fails to load or throws while starting, the page shows a static
message with the same links instead of an empty shell.
Part of #525
* test(cutover): prove the Pair node's Web UI on the real host
Part of #525
* test(cutover): count the new real-host cases in the stock matrix pin
The PM button test and three renderer-and-reload tests, in 2 projects, take the
stock matrix from 110 to 118.
Part of #525
Vito
cd284432f5