[NakataCode]

Problem

The "Inspect UI5 element" right-click option was always visible on UI5 pages, but silently did nothing unless the UI5 Inspector panel was actively open in DevTools.

Solution

Establish a persistent port from the DevTools page to the background service worker. When DevTools close, the port disconnects and the context menu is removed. Combined with the existing panel show/hide logic, the option now only appears while the UI5 Inspector panel is active.

The panel state is persisted in chrome.storage.session so it survives MV3 service-worker eviction/respawn, and a startup reconciliation step removes any orphaned context menu left behind by a previous worker generation.

Additional Fix: Highlight Overlay Clearing

The blue highlight overlay (shown when hovering a control in the tree / elements registry) could get stuck on the page. The overlay's original self-clear — hiding itself on mouseover — stopped working once the wrapper was given pointer-events: none, so it no longer received page hovers.

The overlay is now cleared in all the cases where the inspector stops being the focus:

• Moving the cursor out of the panel onto the page — a mouseleave listener on the panel root broadcasts a hide message.
• Switching away from the UI5 panel (including via keyboard) and closing DevTools entirely — handled by the panel-hide and port-disconnect paths, which also clear highlights in all frames.