Update install software tooltip in setup experience (#48382)

**Related issue:** Resolves #48368

# Before / After
- Before: "Old tooltip for Windows/Linux"
<img width="591" height="278" alt="image"
src="https://github.com/user-attachments/assets/c413c8a0-4c3b-489c-a046-c65d03452c44"
/>


- After: "Updated tooltip for Windows/Linux"
<img width="629" height="283" alt="image"
src="https://github.com/user-attachments/assets/b9e99430-5d63-470d-801e-2d4c060c112d"
/>

- for Mac and Apple-related OS stays unchanged.
<img width="583" height="273" alt="Screenshot 2026-06-28 at 5 52 50 PM"
src="https://github.com/user-attachments/assets/cac7990d-6212-4b69-9467-73d6a3f7d733"
/>



# Checklist for submitter

- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.

## Testing

- [x] Added/updated automated tests
- [x] QA'd all new/changed functionality manually

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

## Summary by CodeRabbit

* **Bug Fixes**
* Updated the “installed during setup” tooltip to clarify installation
order rules.
  * The tooltip now specifies ordering by software name (0–9, then A–Z).
* Added clearer policy sequencing: software without an install policy is
installed before software with a policy.
  * Android setup messaging remains unchanged.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

changes/48368-setup-experience-install-order-tooltip

@@ -0,0 +1 @@
+- Updated the "installed during setup" tooltip on Controls > Setup experience > Install software to clarify that installation order depends on software name (0-9, then A-Z), and that software without a policy is installed before software with a policy.

frontend/pages/ManageControlsPage/SetupExperience/cards/InstallSoftware/components/InstallSoftwareForm/InstallSoftwareForm.tests.tsx

@@ -87,7 +87,47 @@ describe("InstallSoftware", () => {
 
     await waitFor(() => {
       const tooltip = screen.getByText(
-        /Installation order will depend on software name, starting with 0-9 then A-Z./i
+        "Installation order will depend on software name, starting with 0-9 then A-Z."
+      );
+      expect(tooltip).toBeInTheDocument();
+    });
+  });
+
+  it("should render the policy-aware order tooltip for Windows and Linux when there are software titles that have been selected to install at setup", async () => {
+    const { user } = render(
+      <InstallSoftwareForm
+        savedRequireAllSoftwareMacOS={false}
+        currentTeamId={1}
+        softwareTitles={[
+          createMockSoftwareTitle({
+            software_package: createMockSoftwarePackage({
+              install_during_setup: true,
+            }),
+          }),
+          createMockSoftwareTitle(
+            createMockSoftwareTitle({
+              software_package: createMockSoftwarePackage({
+                install_during_setup: true,
+              }),
+            })
+          ),
+          createMockSoftwareTitle(),
+        ]}
+        hasManualAgentInstall={false}
+        platform="windows"
+        router={createMockRouter()}
+        refetchSoftwareTitles={noop}
+      />
+    );
+
+    expect(screen.getByText(/2 software items/)).toBeVisible();
+    expect(screen.getByText(/installed during setup/)).toBeVisible();
+
+    await user.hover(screen.getByText("installed during setup"));
+
+    await waitFor(() => {
+      const tooltip = screen.getByText(
+        "Installation order will depend on software name (0-9, then A-Z). Software without a policy is installed first, then software with a policy."
       );
       expect(tooltip).toBeInTheDocument();
     });

frontend/pages/ManageControlsPage/SetupExperience/cards/InstallSoftware/components/InstallSoftwareForm/InstallSoftwareForm.tsx

@@ -214,10 +214,16 @@ const InstallSoftwareForm = ({
   };
 
   const renderCustomCount = () => {
-    const orderTooltip =
-      platform === "android"
-        ? "Software order will vary."
-        : "Installation order will depend on software name, starting with 0-9 then A-Z.";
+    let orderTooltip: string;
+    if (platform === "android") {
+      orderTooltip = "Software order will vary.";
+    } else if (platform === "windows" || platform === "linux") {
+      orderTooltip =
+        "Installation order will depend on software name (0-9, then A-Z). Software without a policy is installed first, then software with a policy.";
+    } else {
+      orderTooltip =
+        "Installation order will depend on software name, starting with 0-9 then A-Z.";
+    }
 
     return (
       <div>