fix: expand session summary prose with panel

frontend/src/shell/SessionDocumentsPanel.test.tsx

@@ -47,6 +47,16 @@ test("lets the Final SQL document use the full resized panel width", async () =>
   expect(sqlSection?.parentElement).not.toHaveClass("max-w-[76ch]");
 });
 
+test("lets text documents adapt to the full resized panel width", async () => {
+  wrap(<SessionDocumentsPanel session={base} onClose={vi.fn()} onResume={vi.fn()} desktopSplit />);
+
+  const questionSection = (
+    await screen.findByRole("heading", { name: "Original question" })
+  ).closest("section");
+  expect(questionSection).toHaveClass("w-full");
+  expect(questionSection).not.toHaveClass("max-w-[76ch]");
+});
+
 test("shows Resume for resumable, hides it for finalized", async () => {
   const { rerender } = wrap(<SessionDocumentsPanel session={base} onClose={vi.fn()} onResume={vi.fn()} />);
   expect(await screen.findByRole("button", { name: /resume/i })).toBeInTheDocument();

frontend/src/shell/SessionDocumentsPanel.tsx

@@ -188,7 +188,7 @@ export function SessionDocumentsPanel({ session, onClose, onResume, desktopSplit
               <section
                 key={doc.key}
                 className={[
-                  doc.format === "sql" ? "w-full" : "max-w-[76ch]",
+                  "w-full",
                   idx > 0 ? "border-t border-border/50 pt-7" : "",
                 ].join(" ")}
               >