fix: hide empty Program elements section when all scopes are anonymous

422422 								</details>
423423 							{/if}
424424 
425-							<!-- Structural change tree -->
426-							{#if sd.removedVertices.length > 0 || sd.addedVertices.length > 0 || sd.kindChanges.length > 0}
425+							<!-- Structural change tree (program elements) -->
426+							{#if (() => {
427+								const rg = groupVertices(sd.removedVertices, file.path);
428+								const ag = groupVertices(sd.addedVertices, file.path);
429+								return [...new Set([...rg.map(g => g.scope), ...ag.map(g => g.scope)])].filter(s => s !== '(other)' && s !== '(module)').length > 0;
430+							})()}
427431 								{@const removedGroups = groupVertices(sd.removedVertices, file.path)}
428432 								{@const addedGroups = groupVertices(sd.addedVertices, file.path)}
433+								{@const filteredScopes = [...new Set([
434+									...removedGroups.map(g => g.scope),
435+									...addedGroups.map(g => g.scope),
436+								])].filter(s => s !== '(other)' && s !== '(module)')}
429437 								<div class="mb-3 space-y-2">
430-									<!-- Kind changes are surfaced via the breaking/compatible
431-								     change classifications above. No standalone section needed. -->
432-
433-									<!-- Show each scope that had changes -->
434-									<!-- Scope tree - each element is clickable to show its details -->
435438 									<div class="rounded-md border border-border">
436439 										<div class="px-3 py-2 text-xs font-semibold uppercase tracking-wider text-text-muted">
437440 											Program elements
438441 										</div>
439442 										<div class="space-y-0.5 px-1 pb-1">
440-											{#each [...new Set([
441-												...removedGroups.map(g => g.scope),
442-												...addedGroups.map(g => g.scope),
443-											])].filter(s => s !== '(other)' && s !== '(module)') as scope (scope)}
443+											{#each filteredScopes as scope (scope)}
444444 												{@const removed = removedGroups.find(g => g.scope === scope)}
445445 												{@const added = addedGroups.find(g => g.scope === scope)}
446446 												{@const scopeKind = removed?.scopeKind ?? added?.scopeKind ?? '·'}