canvas/src/components/mobile/MobileChat.tsx

@@ -847,7 +847,10 @@ export function MobileChat({
               height: 36,
               borderRadius: 999,
               border: "none",
-              cursor: (draft.trim() || pendingFiles.length === 0) && !uploading ? "pointer" : "not-allowed",
+              cursor:
+                (draft.trim() || pendingFiles.length > 0) && reachable && !uploading
+                  ? "pointer"
+                  : "not-allowed",
               flexShrink: 0,
               background:
                 (draft.trim() || pendingFiles.length > 0) && reachable && !uploading

canvas/src/components/mobile/__tests__/MobileChat.test.tsx

@@ -258,12 +258,28 @@ describe("MobileChat — composer", () => {
     expect(sendBtn).toBeTruthy();
   });
 
-  it("Send button is disabled when textarea is empty (no draft)", () => {
+  it("Send button is disabled when textarea is empty (no draft)", async () => {
     const { container } = renderChat(mockAgentId);
     const sendBtn = container.querySelector('[aria-label="Send"]') as HTMLButtonElement;
     expect(sendBtn.disabled).toBe(true);
   });
 
+  // Regression #2762-follow-up: the send cursor used `pendingFiles.length === 0`,
+  // so attaching a file without typing text left the button enabled but showed a
+  // `not-allowed` cursor. It must be consistent with the disabled prop.
+  it("Send button is enabled and shows pointer cursor when files are attached but draft is empty", async () => {
+    const { container } = renderChat(mockAgentId);
+    const fileInput = container.querySelector('input[type="file"]') as HTMLInputElement;
+    const file = new File(["hello"], "note.txt", { type: "text/plain" });
+    await act(async () => {
+      fireEvent.change(fileInput, { target: { files: [file] } });
+    });
+
+    const sendBtn = container.querySelector('[aria-label="Send"]') as HTMLButtonElement;
+    expect(sendBtn.disabled).toBe(false);
+    expect(sendBtn.style.cursor).toBe("pointer");
+  });
+
   // Regression #224: the composer textarea must render with font-size
   // ≥ 16px. iOS Safari and PWAs auto-zoom the viewport when a focused
   // input has a computed font-size below 16px — the layout jumps and