chore upgrade assistant to AI SDK v7

apps/nextjs/src/components/assistant/assistant-provider.tsx

@@ -259,6 +259,8 @@ const createHistoryAdapter = (threadId: string | undefined): ThreadHistoryAdapte
   withFormat<TMessage, TStorageFormat extends Record<string, unknown>>(
     formatAdapter: MessageFormatAdapter<TMessage, TStorageFormat>,
   ) {
+    // assistant-ui's current AI SDK v7 runtime intentionally keeps this identifier for its
+    // persisted UIMessage wire format. It is a storage codec name, not the installed SDK version.
     if (formatAdapter.format !== "ai-sdk/v6") {
       throw new Error(`Unsupported assistant message format: ${formatAdapter.format}`);
     }
@@ -375,6 +377,8 @@ const AssistantThreadRuntime = () => {
     sendAutomaticallyWhen: shouldAutomaticallyContinueAssistant,
   });
 
+  // The lower-level AI SDK v7 runtime is intentional: Homarr supplies its own tRPC-backed
+  // thread list and history adapters and shares this chat instance with its custom transport.
   const runtime = useAISDKRuntime(chat, {
     ...assistantAiSdkRuntimeOptions,
     adapters: {

apps/nextjs/src/components/assistant/assistant-runtime-provider.spec.ts

@@ -305,6 +305,16 @@ describe("AssistantRuntimeProviderWithTools", () => {
     await act(async () => root.unmount());
   });
 
+  test("forwards main-thread reloads through the surface runtime", async () => {
+    const { root, a, sharedRuntime } = await renderSurfaceTestAssistant();
+    const reloadMainThread = vi.spyOn(sharedRuntime.threads, "reloadMainThread").mockResolvedValue();
+
+    await act(async () => a.threads().reloadMainThread());
+
+    expect(reloadMainThread).toHaveBeenCalledOnce();
+    await act(async () => root.unmount());
+  });
+
   test("restores focus after the Lexical run-start behavior tries to focus every surface", async () => {
     const outsideInput = document.createElement("input");
     document.body.append(outsideInput);

apps/nextjs/src/components/assistant/assistant-runtime-provider.tsx

@@ -348,6 +348,7 @@ export const createAssistantSurfaceRuntime = (runtime: AssistantRuntime): Assist
     switchToNewThread: () => sharedThreads.switchToNewThread(),
     getLoadThreadsPromise: () => sharedThreads.getLoadThreadsPromise(),
     reload: () => sharedThreads.reload(),
+    reloadMainThread: () => sharedThreads.reloadMainThread(),
     loadMore: () => sharedThreads.loadMore(),
   };