feat(workspace): links to single bullets

- copy a link to a bullet from its action bubble or pick a bullet in the
  link dialog; [[Note#^id|Note › excerpt]] opens the note, jumps to and
  highlights the bullet, or says it is gone
- wiki links render inline with their label and are clickable; the
  duplicate chip below the text is gone

test(e2e): run each suite with its own container, image tag and port, so
parallel runs from another working copy no longer remove our server

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

frontend/src/lib/wikiLink.ts

@@ -0,0 +1,33 @@
+// Wiki links: [[Titel]], [[Titel|Anzeigetext]] and links to a single bullet [[Titel#^blockId|Anzeigetext]].
+// A missing bullet just opens the note (links are not updated when a bullet moves to another note).
+
+export interface WikiLink {
+  title: string;
+  blockId?: string;
+  label?: string;
+}
+
+/** Parses the inside of [[…]]. */
+export function parseWikiLink(inner: string): WikiLink {
+  const [target, ...rest] = inner.split('|');
+  const label = rest.join('|').trim() || undefined;
+  const hash = target.indexOf('#');
+  const title = (hash === -1 ? target : target.slice(0, hash)).trim();
+  const anchor = hash === -1 ? '' : target.slice(hash + 1).trim();
+  return { title, blockId: anchor.startsWith('^') ? anchor.slice(1) || undefined : undefined, label };
+}
+
+/** Text shown for a link: its label, else the note title (with » for a bullet). */
+export function wikiLinkText(link: WikiLink): string {
+  if (link.label) return link.label;
+  return link.blockId ? `${link.title} »` : link.title;
+}
+
+/** Link to one bullet; the label is a short excerpt of the bullet so the reader knows what it points to. */
+export function buildBlockLink(title: string, blockId: string, blockContent: string): string {
+  const clean = (s: string) => s.replace(/[[\]|]/g, '').replace(/\s+/g, ' ').trim();
+  let excerpt = clean(blockContent);
+  if (excerpt.length > 40) excerpt = `${excerpt.slice(0, 39).trimEnd()}…`;
+  const label = excerpt ? `${clean(title)} › ${excerpt}` : clean(title);
+  return `[[${clean(title)}#^${blockId}|${label}]]`;
+}