Keep long destination names inspectable without granting stale drop authority

crates/oa-desktop/src/guide.rs

@@ -322,7 +322,7 @@ fn article(topic: Topic) -> Article {
                             &[
                                 "Finish or cancel property and source edits, then drag an Activity or Function body in Architecture · allocated work. Aim at exposed performer space, including a collapsed performer's header. Read Destination above the canvas and the outlined target before releasing; release outside the canvas or press Escape to cancel.",
                                 "The move preserves work ownership and identities. A uniformly assigned work group moves its leaves together; a group distributed across performers asks you to choose a leaf. Role responsibilities remain explicit: an outward drag that would leave a role-derived performer explains why it cannot remove that responsibility.",
-                                "Make room when work cards would overlap, and move the view or zoom in if the moving work is not readable. The destination name stays above the canvas while the target outline stays fixed during the drag. A refused drop keeps the model and history unchanged. One Undo reverses an accepted assignment and placement together; Save all writes the corresponding source changes.",
+                                "Make room when work cards would overlap, and move the view or zoom in if the moving work is not readable. The destination name stays above the canvas while the target outline stays fixed during the drag. Hover Destination to inspect a long name: outside the canvas, the tooltip explicitly identifies the last target, and releasing cancels. Return to the canvas to choose the drop. A refused drop keeps the model and history unchanged. One Undo reverses an accepted assignment and placement together; Save all writes the corresponding source changes.",
                             ],
                         ),
                         walkthrough(