test: move nested-emphasis+ADF tests to adf-passthrough 🧩

- Relocate two intersection tests (nested emphasis containing inline ADF
  nodes) from core-markdown.test.ts to adf-passthrough.test.ts where they
  better reflect the feature under test
- Retain the four pure nested-emphasis tests in core-markdown.test.ts as
  they cover cases not present in pre-existing fixture-based tests

Co-Authored-By: opencode <noreply@opencode.ai>

Author: merphx

lib/test/adf-passthrough.test.ts

@@ -362,6 +362,59 @@ test("passes through multiple inline ADF nodes inside bold text", (t) => {
   });
 });
 
+// --- nested emphasis with inline ADF ---
+
+test("bold span containing both italic text and an inline ADF node", (t) => {
+  const mention = {
+    type: "mention",
+    attrs: { id: "abc-123", text: "@Alice", accessLevel: "APPLICATION" },
+  };
+  t.deepEqual(
+    markdownToAdf(
+      `**contact _Alice_ aka <adf>${JSON.stringify(mention)}</adf>**`,
+    ),
+    {
+      version: 1,
+      type: "doc",
+      content: [
+        {
+          type: "paragraph",
+          content: [
+            { type: "text", text: "contact ", marks: [{ type: "strong" }] },
+            {
+              type: "text",
+              text: "Alice",
+              marks: [{ type: "strong" }, { type: "em" }],
+            },
+            { type: "text", text: " aka ", marks: [{ type: "strong" }] },
+            mention,
+          ],
+        },
+      ],
+    },
+  );
+});
+
+test("inline ADF node inside italic text that is itself inside bold text", (t) => {
+  const date = { type: "date", attrs: { timestamp: "1777852800000" } };
+  t.deepEqual(
+    markdownToAdf(`**returning _<adf>${JSON.stringify(date)}</adf>_**`),
+    {
+      version: 1,
+      type: "doc",
+      content: [
+        {
+          type: "paragraph",
+          content: [
+            { type: "text", text: "returning ", marks: [{ type: "strong" }] },
+            date,
+          ],
+        },
+      ],
+    },
+  );
+});
+
 // --- marked singleton isolation ---
 
 test("importing marklassian does not affect marked.parse() HTML output", (t) => {

lib/test/core-markdown.test.ts

@@ -250,56 +250,3 @@ test("strikethrough text containing bold produces both marks on the inner text",
     ],
   });
 });
-
-// --- nested emphasis with inline ADF ---
-
-test("bold span containing both italic text and an inline ADF node", (t) => {
-  const mention = {
-    type: "mention",
-    attrs: { id: "abc-123", text: "@Alice", accessLevel: "APPLICATION" },
-  };
-  t.deepEqual(
-    markdownToAdf(
-      `**contact _Alice_ aka <adf>${JSON.stringify(mention)}</adf>**`,
-    ),
-    {
-      version: 1,
-      type: "doc",
-      content: [
-        {
-          type: "paragraph",
-          content: [
-            { type: "text", text: "contact ", marks: [{ type: "strong" }] },
-            {
-              type: "text",
-              text: "Alice",
-              marks: [{ type: "strong" }, { type: "em" }],
-            },
-            { type: "text", text: " aka ", marks: [{ type: "strong" }] },
-            mention,
-          ],
-        },
-      ],
-    },
-  );
-});
-
-test("inline ADF node inside italic text that is itself inside bold text", (t) => {
-  const date = { type: "date", attrs: { timestamp: "1777852800000" } };
-  t.deepEqual(
-    markdownToAdf(`**returning _<adf>${JSON.stringify(date)}</adf>_**`),
-    {
-      version: 1,
-      type: "doc",
-      content: [
-        {
-          type: "paragraph",
-          content: [
-            { type: "text", text: "returning ", marks: [{ type: "strong" }] },
-            date,
-          ],
-        },
-      ],
-    },
-  );
-});