fix(credential-pools): refresh view after OAuth sheet dismiss

The sheet auto-closes 0.8s after `oauthFlow.succeeded` flips, but
the parent view didn't reload — so the expiry badge stayed red and
the `tokenTail` stayed stale until the user hit Reload. Hook
`viewModel.load()` + `probeKeepalive()` into the sheet's
`onDismiss` so the freshly-written `auth.json` lands on screen
immediately. Runs on every dismiss (success or cancel) — `load()`
is cheap and idempotent.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

scarf/scarf/Features/CredentialPools/Views/CredentialPoolsView.swift

@@ -78,7 +78,17 @@ struct CredentialPoolsView: View {
         .onChange(of: coordinator.pendingOAuthReauth) { _, _ in
             consumePendingReauth()
         }
-        .sheet(isPresented: $showAddSheet, onDismiss: { reauthInitialProvider = nil }) {
+        .sheet(isPresented: $showAddSheet, onDismiss: {
+            // Refresh after every dismiss — the OAuth flow rewrites
+            // `auth.json` on success, but the sheet self-closes
+            // before SwiftUI re-renders the parent. Without this,
+            // users had to hit Reload manually after a successful
+            // re-auth to see the expiry badge clear and the new
+            // `tokenTail` populate.
+            reauthInitialProvider = nil
+            viewModel.load()
+            probeKeepalive()
+        }) {
             AddCredentialSheet(viewModel: viewModel, initialProvider: reauthInitialProvider) {
                 showAddSheet = false
             }