tui: fix continue session navigation to wait for sync completion before redirecting

Previously, the continue session navigation would immediately try to redirect
to the most recent session before the sync data was fully loaded, causing
navigation to fail. Now it waits for sync status to be complete before
attempting the redirect, ensuring the session data is available.

packages/opencode/src/cli/cmd/tui/app.tsx

@@ -176,15 +176,6 @@ function App() {
           })
         local.model.set({ providerID, modelID }, { recent: true })
       }
-      if (args.continue) {
-        const match = sync.data.session.at(0)?.id
-        if (match) {
-          route.navigate({
-            type: "session",
-            sessionID: match,
-          })
-        }
-      }
       if (args.sessionID) {
         route.navigate({
           type: "session",
@@ -194,6 +185,19 @@ function App() {
     })
   })
 
+  createEffect(() => {
+    if (sync.status !== "complete") return
+    if (args.continue) {
+      const match = sync.data.session.at(0)?.id
+      if (match) {
+        route.navigate({
+          type: "session",
+          sessionID: match,
+        })
+      }
+    }
+  })
+
   command.register(() => [
     {
       title: "Switch session",