Route the application-passwords list screen through Basic auth

WordPress/src/main/java/org/wordpress/android/ui/accounts/applicationpassword/ApplicationPasswordsViewModel.kt

@@ -186,7 +186,13 @@ class ApplicationPasswordsViewModel @Inject constructor(
     }
 
     private suspend fun getApplicationPasswordsList(site: SiteModel): List<ApplicationPasswordWithViewContext> {
-        val wpApiClient = wpApiClientProvider.getWpApiClient(site)
+        // Always use the direct-host Basic-auth client. `getWpApiClient` routes WPCom-flagged
+        // sites (including Atomic) through the WP.com REST proxy, which doesn't expose the
+        // `application-passwords` routes — every call 404s with `rest_no_route`. Talking to the
+        // site directly with the stored application password sidesteps that limitation.
+        // Requires the SiteModel to have credentials already (e.g. via the My Site auto-mint
+        // flow); otherwise the call will 401.
+        val wpApiClient = wpApiClientProvider.getApplicationPasswordClient(site)
 
         val currentUserId = getCurrentUserId(wpApiClient)
         return if (currentUserId == null) {

libs/fluxc/src/main/java/org/wordpress/android/fluxc/network/rest/wpapi/rs/WpApiClientProvider.kt

@@ -70,6 +70,20 @@ class WpApiClientProvider @Inject constructor(
         }
     }
 
+    /**
+     * Always returns a Basic-auth client against the direct host using the SiteModel's
+     * application-password credentials, regardless of WP.com routing. Use this when you need to
+     * talk to the site's own REST endpoints with the application password — `getWpApiClient`
+     * routes WPCom-flagged sites (including Atomic) through the bearer-token path and the WP.com
+     * REST proxy, which doesn't expose application-password-authenticated routes like
+     * `/wp/v2/users/{id}/application-passwords`.
+     */
+    @Synchronized
+    fun getApplicationPasswordClient(site: SiteModel): WpApiClient =
+        selfHostedClients.getOrPut(site.id) {
+            createSelfHostedClient(site, uploadListener = null)
+        }
+
     private fun createSelfHostedClient(
         site: SiteModel,
         uploadListener: WpRequestExecutor.UploadListener?,