test(channels): lift taskChannel factory, note getTasks 500 cap

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: adamleithp

packages/ui/src/features/canvas/hooks/useChannels.test.tsx

@@ -33,6 +33,14 @@ function folder(id: string, path: string): Schemas.FileSystem {
   };
 }
 
+function taskChannel(
+  id: string,
+  name: string,
+  channel_type: TaskChannel["channel_type"] = "public",
+): TaskChannel {
+  return { id, name, channel_type, created_at: "2026-01-01T00:00:00Z" };
+}
+
 let queryClient: QueryClient;
 function wrapper({ children }: { children: ReactNode }) {
   return (
@@ -109,14 +117,6 @@ describe("useChannelMutations", () => {
 });
 
 describe("useChannelMutations rename", () => {
-  function taskChannel(
-    id: string,
-    name: string,
-    channel_type: TaskChannel["channel_type"] = "public",
-  ): TaskChannel {
-    return { id, name, channel_type, created_at: "2026-01-01T00:00:00Z" };
-  }
-
   beforeEach(() => {
     vi.clearAllMocks();
     queryClient = new QueryClient({
@@ -219,14 +219,6 @@ describe("useChannelMutations rename", () => {
 });
 
 describe("useChannelMutations delete", () => {
-  function taskChannel(
-    id: string,
-    name: string,
-    channel_type: TaskChannel["channel_type"] = "public",
-  ): TaskChannel {
-    return { id, name, channel_type, created_at: "2026-01-01T00:00:00Z" };
-  }
-
   beforeEach(() => {
     vi.clearAllMocks();
     queryClient = new QueryClient({

packages/ui/src/features/canvas/hooks/useChannels.ts

@@ -120,6 +120,10 @@ export function useChannelMutations() {
           (c) => c.channel_type === "public" && c.name === normalized,
         );
         if (backendChannel) {
+          // getTasks caps at 500 and does not paginate, so a channel with more
+          // than 500 tasks soft-deletes only the first page here. The channel
+          // itself is still soft-deleted below, so any stragglers stay attached
+          // to it and remain recoverable — nothing is lost, just left behind.
           const tasks = await client.getTasks({ channel: backendChannel.id });
           // Best-effort per task — one failed soft delete shouldn't strand
           // the rest or block the channel delete (the failed task stays