Function resolveAnchor

src/ui-server/api/steps.ts:1498–1515

* The anchor: `anchor= `, or `symbol= ` resolved to the most * screen-like symbol of that name — a route first, then a component or * function, then a method — with the rest reported as `ambiguous`.

(cg: CodeGraph, query: URLSearchParams)

 * function, then a method — with the rest reported as `ambiguous`.
 */
function resolveAnchor(cg: CodeGraph, query: URLSearchParams): { anchor: Node; ambiguous: WireNodeRef[] } {
  const id = query.get('anchor');
  if (id !== null && id.trim() !== '') {
    const node = cg.getNode(id);
    if (!node) throw notFound(`No symbol with id "${id}" in this index.`, 'It may have moved in a re-index; open it from search or the Screens view.');
    return { anchor: node, ambiguous: [] };
  }
  const name = query.get('symbol');
  if (name === null || name.trim() === '') throw badRequest('Give the picture an anchor: ?anchor=<node id> or ?symbol=<name>.');
  const rank: Record<string, number> = { route: 0, component: 1, function: 2, method: 3, class: 4, constant: 5, variable: 6 };
  const matches = cg
    .getNodesByName(name.trim())
    .filter((n) => n.kind !== 'file' && n.kind !== 'import' && n.kind !== 'export')
    .sort((a, b) => (rank[a.kind] ?? 9) - (rank[b.kind] ?? 9) || a.filePath.localeCompare(b.filePath) || a.startLine - b.startLine);
  const anchor = matches[0];
  if (!anchor) throw notFound(`Nothing in this index is named "${name}".`, 'Try the search box; names are matched exactly.');
  return { anchor, ambiguous: matches.slice(1, 9).map(toNodeRef) };
}

/** How many distinct parents render this node as a JSX child. Memoised per request. */
function renderParents(cg: CodeGraph, node: Node, memo: Map<string, number>): number {