[UII] Remove action links and buttons when secrets field is disabled (#188252)

## Summary

Resolves #187642 

This PR removes action links and buttons to replace and convert secrets
fields if the field itself is disabled, for cases like the user not
having write permissions:

<img width="730" alt="image"
src="https://github.com/user-attachments/assets/957ad858-74bf-4f28-a212-148253e4ca0f">

<img width="716" alt="image"
src="https://github.com/user-attachments/assets/d70f7946-8b62-4e13-9d16-98ddac26b826">

Also applies sentence casing to `Service token` label.

### Checklist

- [x] [Unit or functional
tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html)
were updated or added to match the most common scenarios

x-pack/plugins/fleet/cypress/e2e/fleet_settings_outputs.cy.ts

@@ -182,7 +182,7 @@ queue:
 
       cy.contains('Name is required');
       cy.contains('URL is required');
-      cy.contains('Service Token is required');
+      cy.contains('Service token is required');
       shouldDisplayError(SETTINGS_OUTPUTS.NAME_INPUT);
       shouldDisplayError('serviceTokenSecretInput');
     });

x-pack/plugins/fleet/public/applications/fleet/sections/settings/components/edit_output_flyout/index.test.tsx

@@ -83,7 +83,7 @@ const kafkaSectionsLabels = [
   'Broker settings',
 ];
 
-const remoteEsOutputLabels = ['Hosts', 'Service Token'];
+const remoteEsOutputLabels = ['Hosts', 'Service token'];
 
 describe('EditOutputFlyout', () => {
   const mockStartServices = (isServerlessEnabled?: boolean) => {

x-pack/plugins/fleet/public/applications/fleet/sections/settings/components/edit_output_flyout/output_form_remote_es.tsx

@@ -82,7 +82,7 @@ export const OutputFormRemoteEsSection: React.FunctionComponent<Props> = (props)
           label={
             <FormattedMessage
               id="xpack.fleet.settings.editOutputFlyout.serviceTokenLabel"
-              defaultMessage="Service Token"
+              defaultMessage="Service token"
             />
           }
           {...inputs.serviceTokenInput.formRowProps}
@@ -105,7 +105,7 @@ export const OutputFormRemoteEsSection: React.FunctionComponent<Props> = (props)
         <SecretFormRow
           fullWidth
           title={i18n.translate('xpack.fleet.settings.editOutputFlyout.serviceTokenLabel', {
-            defaultMessage: 'Service Token',
+            defaultMessage: 'Service token',
           })}
           {...inputs.serviceTokenSecretInput.formRowProps}
           cancelEdit={inputs.serviceTokenSecretInput.cancelEdit}

x-pack/plugins/fleet/public/applications/fleet/sections/settings/components/edit_output_flyout/output_form_secret_form_row.test.tsx

@@ -8,6 +8,7 @@
 import React from 'react';
 import { fireEvent } from '@testing-library/react';
 import { renderReactTestingLibraryWithI18n } from '@kbn/test-jest-helpers';
+
 import { SecretFormRow } from './output_form_secret_form_row';
 
 describe('SecretFormRow', () => {
@@ -42,8 +43,8 @@ describe('SecretFormRow', () => {
     expect(queryByText(initialValue)).not.toBeInTheDocument();
   });
 
-  it('should not enable the replace button if the row is disabled', () => {
-    const { getByText } = renderReactTestingLibraryWithI18n(
+  it('should not enable action links if the row is disabled', () => {
+    const { getByText, queryByText } = renderReactTestingLibraryWithI18n(
       <SecretFormRow
         title={title}
         initialValue={initialValue}
@@ -57,7 +58,10 @@ describe('SecretFormRow', () => {
       </SecretFormRow>
     );
 
-    expect(getByText('Replace Test Secret').closest('button')).toBeDisabled();
+    expect(getByText('The saved Test Secret is hidden.')).toBeInTheDocument();
+    expect(queryByText('Replace Test Secret')).not.toBeInTheDocument();
+    expect(queryByText('Click to use secret storage instead')).not.toBeInTheDocument();
+    expect(queryByText('Click to use plain text storage instead')).not.toBeInTheDocument();
   });
 
   it('should call the cancelEdit function when the cancel button is clicked', () => {

x-pack/plugins/fleet/public/applications/fleet/sections/settings/components/edit_output_flyout/output_form_secret_form_row.tsx

@@ -55,32 +55,45 @@ export const SecretFormRow: React.FC<{
   const [editMode, setEditMode] = useState(isConvertedToSecret || !initialValue);
   const valueHiddenPanel = (
     <EuiPanel color="subdued" borderRadius="none" hasShadow={false}>
-      <EuiText size="s" color="subdued">
-        <FormattedMessage
-          id="xpack.fleet.outputForm.secretValueHiddenMessage"
-          defaultMessage="The saved {varName} is hidden. You can only replace the {varName}."
-          values={{
-            varName: title,
-          }}
-        />
-      </EuiText>
-      <EuiSpacer size="s" />
-      <EuiButtonEmpty
-        disabled={disabled}
-        onClick={() => setEditMode(true)}
-        color="primary"
-        iconType="refresh"
-        iconSide="left"
-        size="xs"
-      >
-        <FormattedMessage
-          id="xpack.fleet.outputForm.editSecretValue"
-          defaultMessage="Replace {varName}"
-          values={{
-            varName: title,
-          }}
-        />
-      </EuiButtonEmpty>
+      {disabled ? (
+        <EuiText size="s" color="subdued">
+          <FormattedMessage
+            id="xpack.fleet.outputForm.secretValueHiddenAndDisabledMessage"
+            defaultMessage="The saved {varName} is hidden."
+            values={{
+              varName: title,
+            }}
+          />
+        </EuiText>
+      ) : (
+        <>
+          <EuiText size="s" color="subdued">
+            <FormattedMessage
+              id="xpack.fleet.outputForm.secretValueHiddenMessage"
+              defaultMessage="The saved {varName} is hidden. You can only replace the {varName}."
+              values={{
+                varName: title,
+              }}
+            />
+          </EuiText>
+          <EuiSpacer size="s" />
+          <EuiButtonEmpty
+            onClick={() => setEditMode(true)}
+            color="primary"
+            iconType="refresh"
+            iconSide="left"
+            size="xs"
+          >
+            <FormattedMessage
+              id="xpack.fleet.outputForm.editSecretValue"
+              defaultMessage="Replace {varName}"
+              values={{
+                varName: title,
+              }}
+            />
+          </EuiButtonEmpty>
+        </>
+      )}
     </EuiPanel>
   );
 
@@ -134,6 +147,7 @@ export const SecretFormRow: React.FC<{
   );
 
   const helpText = useMemo(() => {
+    if (disabled) return null;
     if (isConvertedToSecret)
       return (
         <EuiCallOut size="s" color="warning">
@@ -172,9 +186,9 @@ export const SecretFormRow: React.FC<{
         />
       );
     return undefined;
-  }, [initialValue, isConvertedToSecret, onToggleSecretStorage]);
+  }, [disabled, initialValue, isConvertedToSecret, onToggleSecretStorage]);
 
-  const plainTextHelp = (
+  const plainTextHelp = disabled ? null : (
     <FormattedMessage
       id="xpack.fleet.settings.editOutputFlyout.secretInputCalloutTitle"
       defaultMessage="This field should be stored as a secret, currently it is set to be stored as plain text. {enableSecretLink}"

x-pack/plugins/fleet/public/applications/fleet/sections/settings/components/edit_output_flyout/output_form_validators.tsx

@@ -277,7 +277,7 @@ export function validateServiceToken(value: string) {
   if (!value || value === '') {
     return [
       i18n.translate('xpack.fleet.settings.outputForm.serviceTokenRequiredErrorMessage', {
-        defaultMessage: 'Service Token is required',
+        defaultMessage: 'Service token is required',
       }),
     ];
   }