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/__tests__/wikiLink.test.ts

@@ -0,0 +1,21 @@
+import { describe, it, expect } from 'vitest';
+import { buildBlockLink, parseWikiLink, wikiLinkText } from '../wikiLink';
+
+describe('wiki links', () => {
+  it('parses plain, labelled, section and bullet links', () => {
+    expect(parseWikiLink('Homelab')).toEqual({ title: 'Homelab', blockId: undefined, label: undefined });
+    expect(parseWikiLink('Homelab|hier')).toEqual({ title: 'Homelab', blockId: undefined, label: 'hier' });
+    expect(parseWikiLink('Homelab#Abschnitt')).toEqual({ title: 'Homelab', blockId: undefined, label: undefined });
+    expect(parseWikiLink('Homelab#^blk_a_1|Homelab › Backup')).toEqual({
+      title: 'Homelab', blockId: 'blk_a_1', label: 'Homelab › Backup',
+    });
+  });
+
+  it('builds a bullet link that parses back', () => {
+    const link = buildBlockLink('Homelab [neu]', 'blk_x', 'Backups liefen bisher nur manuell – das soll sich ändern #backup');
+    expect(link).toBe('[[Homelab neu#^blk_x|Homelab neu › Backups liefen bisher nur manuell – das…]]');
+    const parsed = parseWikiLink(link.slice(2, -2));
+    expect(parsed.blockId).toBe('blk_x');
+    expect(wikiLinkText(parsed)).toBe('Homelab neu › Backups liefen bisher nur manuell – das…');
+  });
+});

frontend/src/lib/markdown.tsx

@@ -1,5 +1,6 @@
 import React from 'react';
 import { safeHref } from './safeUrl';
+import { parseWikiLink, wikiLinkText } from './wikiLink';
 
 /**
  * Parses inline markdown:
@@ -9,9 +10,11 @@ import { safeHref } from './safeUrl';
  * - `code`
  * - [label](url)
  * - #hashtag (only when `options.onTagClick` is given), rendered inline as a clickable chip
+ * - [[wiki link]] shown by its label (clickable with `options.onWikiLinkClick`)
  */
 export interface InlineMarkdownOptions {
   onTagClick?: (tag: string) => void;
+  onWikiLinkClick?: (title: string, blockId?: string) => void;
 }
 
 function renderInlineTokens(text: string, options?: InlineMarkdownOptions): React.ReactNode[] {
@@ -19,7 +22,7 @@ function renderInlineTokens(text: string, options?: InlineMarkdownOptions): Reac
 
   const tagAlt = options?.onTagClick ? '|#[a-zA-Z0-9äöüÄÖÜß_-]+' : '';
   const regex = new RegExp(
-    '(`[^`]+`|\\*\\*[^*]+\\*\\*|__[^_]+__|~~[^~]+~~|\\*[^*]+\\*|_[^_]+_|\\[([^\\]]+)\\]\\(([^)]+)\\)' + tagAlt + ')',
+    '(\\[\\[[^\\]]+\\]\\]|`[^`]+`|\\*\\*[^*]+\\*\\*|__[^_]+__|~~[^~]+~~|\\*[^*]+\\*|_[^_]+_|\\[([^\\]]+)\\]\\(([^)]+)\\)' + tagAlt + ')',
     'g'
   );
 
@@ -34,7 +37,31 @@ function renderInlineTokens(text: string, options?: InlineMarkdownOptions): Reac
     const token = match[0];
     const key = `${match.index}-${token}`;
 
-    if (token.startsWith('#')) {
+    if (token.startsWith('[[') && token.endsWith(']]')) {
+      const link = parseWikiLink(token.slice(2, -2));
+      const onClick = options?.onWikiLinkClick;
+      elements.push(
+        onClick ? (
+          <span
+            key={key}
+            role="button"
+            tabIndex={-1}
+            onClick={(e) => {
+              e.stopPropagation();
+              onClick(link.title, link.blockId);
+            }}
+            className="text-status-info underline decoration-status-info/40 underline-offset-2 hover:decoration-status-info cursor-pointer"
+            title={link.blockId ? `Zum Punkt in „${link.title}“` : `Notiz öffnen: ${link.title}`}
+          >
+            {wikiLinkText(link)}
+          </span>
+        ) : (
+          <span key={key} className="text-status-info">
+            {wikiLinkText(link)}
+          </span>
+        )
+      );
+    } else if (token.startsWith('#')) {
       const prevChar = match.index > 0 ? text[match.index - 1] : '';
       if (prevChar && !/[\s(]/.test(prevChar)) {
         // e.g. an URL fragment like https://x/#anchor: keep as plain text

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}]]`;
+}