KAN-73: document and validate MCP ticket description format

tests/Fixtures/ticket-description-browser.mjs

@@ -3,6 +3,7 @@ import TicketDescriptionEditor from '../../resources/js/components/tickets/Ticke
 import TicketDescription from '../../resources/js/components/tickets/TicketDescription.vue';
 import { createLocalization } from '../../resources/js/lib/localization';
 import '../../resources/css/app.css';
+import descriptionFormat from '../../resources/js/lib/ticket-description-format.json';
 
 const original = 'First line\nSecond line\n\n**Existing bold**';
 const state = reactive({
@@ -199,6 +200,33 @@ try {
     state.value =
         '# Plan\n\nUse **bold** and *italic* formatting, lists and [links](https://example.test).\n\n- Create ticket\n- Save description\n\n> Keep existing descriptions readable.';
     await tick();
+    state.value = descriptionFormat.example;
+    await tick();
+    assert(
+        document.querySelector('#description h2')?.textContent === 'Goal',
+        'MCP example opens formatted in WYSIWYG',
+    );
+    assert(
+        document.querySelector('#description strong')?.textContent ===
+            'context',
+        'MCP emphasis is formatted',
+    );
+    assert(
+        document.querySelectorAll('#description li').length === 2,
+        'MCP ordinary lists render',
+    );
+    assert(
+        !document.querySelector('textarea#description'),
+        'MCP example avoids source fallback',
+    );
+    state.value = '## Legacy\n\n- [ ] Criterion';
+    await tick();
+    assert(
+        document.querySelector('textarea#description')?.value === state.value,
+        'Legacy task checkboxes retain original source',
+    );
+    state.value = descriptionFormat.example;
+    await tick();
     state.result =
         'Browser checks passed: formatting, undo/redo, source round-trip, links, errors, disabled state, reset, clearing and legacy content.';
 } catch (error) {