refactor(ui): render the no-providers scan hint as a compact banner

- Add a "hint" variant to NoProvidersAdded (horizontal banner) so the
  Scans-page no-providers hint matches the not-connected hint
- Providers page keeps the default full-page "page" variant

ui/components/providers/no-providers-added.tsx

@@ -11,10 +11,21 @@ const NO_PROVIDERS_ADDED_ACTION = {
   LINK: "link",
 } as const;
 
+// "page" is the full-screen empty state (Providers page); "hint" is a compact
+// horizontal banner that sits above other content (Scans page).
+const NO_PROVIDERS_ADDED_VARIANT = {
+  PAGE: "page",
+  HINT: "hint",
+} as const;
+
+type NoProvidersAddedVariant =
+  (typeof NO_PROVIDERS_ADDED_VARIANT)[keyof typeof NO_PROVIDERS_ADDED_VARIANT];
+
 interface NoProvidersAddedBaseProps {
   containerClassName?: string;
   // Tour anchor for the CTA; needed because this empty state replaces the table's AddProviderButton.
   ctaTourId?: string;
+  variant?: NoProvidersAddedVariant;
 }
 
 interface NoProvidersAddedButtonProps extends NoProvidersAddedBaseProps {
@@ -33,14 +44,23 @@ type NoProvidersAddedProps =
   | NoProvidersAddedButtonProps
   | NoProvidersAddedLinkProps;
 
-const renderCta = (props: NoProvidersAddedProps) => {
+const renderCta = (
+  props: NoProvidersAddedProps,
+  variant: NoProvidersAddedVariant,
+) => {
+  const isHint = variant === NO_PROVIDERS_ADDED_VARIANT.HINT;
+  const className = isHint
+    ? "w-full justify-center md:w-fit"
+    : "w-full max-w-xs justify-center";
+  const size = isHint ? undefined : "lg";
+
   if (props.action === NO_PROVIDERS_ADDED_ACTION.LINK) {
     return (
       <Button
         asChild
         aria-label="Open Add Provider modal"
-        className="w-full max-w-xs justify-center"
-        size="lg"
+        className={className}
+        size={size}
       >
         <Link href={props.href}>Add a Provider</Link>
       </Button>
@@ -50,9 +70,9 @@ const renderCta = (props: NoProvidersAddedProps) => {
   return (
     <Button
       aria-label="Open Add Provider modal"
-      className="w-full max-w-xs justify-center"
+      className={className}
       data-tour-id={props.ctaTourId}
-      size="lg"
+      size={size}
       onClick={props.onOpenWizard}
     >
       Add a Provider
@@ -61,6 +81,33 @@ const renderCta = (props: NoProvidersAddedProps) => {
 };
 
 export const NoProvidersAdded = (props: NoProvidersAddedProps) => {
+  const variant = props.variant ?? NO_PROVIDERS_ADDED_VARIANT.PAGE;
+
+  // Compact horizontal hint, matching NoProvidersConnected so both provider
+  // hints on the Scans page share one composition.
+  if (variant === NO_PROVIDERS_ADDED_VARIANT.HINT) {
+    return (
+      <Card variant="base">
+        <CardContent className="flex w-full flex-col items-start gap-6 md:flex-row md:items-center md:justify-between md:gap-8">
+          <div className="flex flex-col gap-3">
+            <div className="flex items-center justify-start gap-3">
+              <InfoIcon className="h-6 w-6 text-gray-800 dark:text-white" />
+              <h2 className="text-lg font-bold text-gray-800 dark:text-white">
+                No Providers Configured
+              </h2>
+            </div>
+            <p className="text-sm text-gray-600 dark:text-gray-300">
+              No providers have been configured. Start by setting up a provider.
+            </p>
+          </div>
+          <div className="w-full md:w-auto md:shrink-0">
+            {renderCta(props, variant)}
+          </div>
+        </CardContent>
+      </Card>
+    );
+  }
+
   return (
     <div
       role="region"
@@ -87,7 +134,7 @@ export const NoProvidersAdded = (props: NoProvidersAddedProps) => {
             </p>
           </div>
 
-          {renderCta(props)}
+          {renderCta(props, variant)}
         </CardContent>
       </Card>
     </div>

ui/components/scans/scans-page-shell.tsx

@@ -119,10 +119,7 @@ export function ScansPageShell({
       {/* Signals the navbar that this route's data has loaded (enables the replay icon). */}
       <PageReady />
       {showProvidersHint && (
-        <ScansProvidersEmptyState
-          thereIsNoProviders={thereAreNoProviders}
-          containerClassName="min-h-0"
-        />
+        <ScansProvidersEmptyState thereIsNoProviders={thereAreNoProviders} />
       )}
       <div
         role="group"

ui/components/scans/scans-providers-empty-state.tsx

@@ -5,20 +5,13 @@ import { NoProvidersConnected } from "./no-providers-connected";
 
 interface ScansProvidersEmptyStateProps {
   thereIsNoProviders: boolean;
-  /** Overrides the NoProvidersAdded container height so it can sit as a compact top hint. */
-  containerClassName?: string;
 }
 
 export function ScansProvidersEmptyState({
   thereIsNoProviders,
-  containerClassName,
 }: ScansProvidersEmptyStateProps) {
   return thereIsNoProviders ? (
-    <NoProvidersAdded
-      action="link"
-      href={ADD_PROVIDER_HREF}
-      containerClassName={containerClassName}
-    />
+    <NoProvidersAdded action="link" href={ADD_PROVIDER_HREF} variant="hint" />
   ) : (
     <NoProvidersConnected />
   );