Leave hiding and deleting a link to its right-click menu

The inspector of a picked link carried the buttons Hide link and
Delete link below its facts. Both actions are in the right-click
menu of the line since #289, and Delete removes a picked link as
well. The user asked for the buttons to go.

- buildEdgeSection in editor/inspector/edgeSection.ts only
  describes now: the two ends, the type, and for a transition its
  name field.
- The button under several picked links and Delete transition in a
  state machine go with them. They came from the same line of
  code, and the menu offers both.
- The note under several links stays. It speaks of the Delete key.

Tests:
- Gate on melektaus-atx: 212 files, 3260 tests, exit 0.
- e2e 4,6,26 on melektaus-atx: 275 checks, all pass.
- No full run and no smokes. The sum of e2e checks stays at 1676,
  which is reckoned.
- Module 06 now checks that the inspector of a picked link shows
  neither button. Its menu check finds Hide link and Delete link
  only in the menu, where it had to take the one drawn last before.
- Module 26 checks that a picked transition shows no Delete
  transition.
- No unit test names the buttons. No counter-probe was run. The
  old checks found both texts in the inspector, which is the state
  the new ones would fail on.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/editor/inspector/edgeSection.ts

@@ -3,10 +3,10 @@ import { findNode, type GraphEdge, isStateNode, resolveDef, stateName } from '..
 import { graphLookup } from '../../core/model/graphLookup';
 import { findGraphAsset, type Project } from '../../core/model/Project';
 import { textOf } from '../../core/model/Properties';
-import { Button, Label } from '../../ui';
-import { hideLinks, linkNoun, removeGraphSelection } from '../actions';
+import { Label } from '../../ui';
+import { linkNoun } from '../actions';
 import { createFieldRow, labelledRow } from './fieldFactory';
-import { addGap, addNote, addTitle, type InspectorHost } from './host';
+import { addNote, addTitle, type InspectorHost } from './host';
 
 const NAME_KEY = 'transition-name';
 
@@ -64,7 +64,10 @@ export function edgeSignature(
   return d ? [d.transition, d.from, d.output, d.to, d.input, d.type].join('|') : 'missing';
 }
 
-/** One link: where it comes from and goes to. Several: how many, and the way to delete them. */
+/**
+ * One link: where it comes from and goes to. Several: how many. Hiding and deleting live in the
+ * right-click menu of the line, not here.
+ */
 export function buildEdgeSection(
   host: InspectorHost,
   assetId: string,
@@ -72,18 +75,9 @@ export function buildEdgeSection(
   edgeIds: readonly string[],
 ): void {
   const noun = linkNoun(host.state, assetId);
-  const remove = (label: string) =>
-    host.body.add(
-      new Button(label, {
-        variant: 'danger',
-        onClick: () => removeGraphSelection(host.state, assetId, [], [], edgeIds),
-      }),
-    );
   if (edgeIds.length > 1) {
     addTitle(host, `${edgeIds.length} ${noun.toUpperCase()}S`);
     addNote(host, 'Delete removes all of them in one step.');
-    addGap(host);
-    remove(`Delete ${edgeIds.length} ${noun}s`);
     return;
   }
   const d = describeEdge(host.state.project, assetId, edgeId);
@@ -109,10 +103,6 @@ export function buildEdgeSection(
     fact('Input', d.input);
     fact('Type', d.type);
   }
-  addGap(host);
-  if (!d.transition)
-    host.body.add(new Button('Hide link', { onClick: () => hideLinks(host.state, assetId, [edgeId]) }));
-  remove(`Delete ${noun}`);
 }
 
 /** Pushes the current name into its row. False when the link is gone (rebuild). */