Remove obsolete canvas panel focus mode

crates/oa-desktop/src/guide.rs

@@ -463,7 +463,7 @@ fn article(topic: Topic) -> Article {
                         ),
                         explain(
                             "Navigate the canvas",
-                            "The header and palette stay available while Details and creation forms overlay the canvas. Fit frames the contents; −/+ changes zoom and 100% restores working scale. Focus the canvas to zoom with the wheel or pan with middle-button drag or Space + left drag. F6 enters or leaves canvas controls; Tab moves to the next control, Enter/Space activates it, and Escape leaves canvas controls or cancels a gesture.",
+                            "The header and palette stay available while Details and creation forms overlay the canvas. Fit frames the contents; −/+ changes zoom and 100% restores working scale. Click in the canvas to give it wheel and keyboard focus; pan with middle-button drag or Space + left drag. F6 enters or leaves canvas keyboard controls; Tab moves to the next control, Enter/Space activates it, and Escape leaves canvas controls or cancels a gesture.",
                         ),
                         explain(
                             "Choose the right behavioral description",
@@ -476,7 +476,7 @@ fn article(topic: Topic) -> Article {
                         walkthrough(
                             "Connect a particular use of a procedure",
                             &[
-                                "Choose Focus canvas for more working space; Restore panels brings the explorer and properties back. Select a contribution inside a reusable preview, then open Details to read its complete caller and reference identity.",
+                                "Select a contribution directly inside a reusable preview, then open Details to read its complete caller and reference identity. The explorer and properties remain available alongside the canvas.",
                                 "In Details, use Expand nested reference or Fold nested reference to inspect that instance. Open source or Open contribution definition visits the shared definition; Back to caller returns to the original caller context.",
                                 "Open Details → Qualified link / assembly... and choose its source and target. Use Enter reference to open an instance's contributions, Up one reference for its caller scope, or Root for the link owner. Search and page through all contributions in that scope, then select the exact endpoint. The first and second uses of a procedure remain different choices even when their work has the same name.",
                                 "Choose Precedence to describe order and its guard, Exchange assembly to identify a work exchange between the contributions, or Common work incidence to state that both use the same work. Select the engineering identity when required, then Apply link.",