refactor(shared): reuse chat content extractor for assistant text

src/shared/shared-misc.test.ts

@@ -30,6 +30,22 @@ describe("extractTextFromChatContent", () => {
       }),
     ).toBe("Here ok");
   });
+
+  it("supports custom join and normalization", () => {
+    expect(
+      extractTextFromChatContent(
+        [
+          { type: "text", text: " hello " },
+          { type: "text", text: "world " },
+        ],
+        {
+          sanitizeText: (text) => text.trim(),
+          joinWith: "\n",
+          normalizeText: (text) => text.trim(),
+        },
+      ),
+    ).toBe("hello\nworld");
+  });
 });
 
 describe("shared/frontmatter", () => {