feat: show which part of the copy a fork being created is in

The background copy reports its phase (data tables, settings, resources,
scripts, flows, apps, drafts, triggers) through a watch channel. The heartbeat
task records it on the fork's creation row as soon as it changes, and
fork_creation_status returns it. The fork wizard shows it on its button, and
the CLI logs each step.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

cli/src/commands/workspace/fork.ts

@@ -30,6 +30,7 @@ import {
  */
 async function waitForForkCreation(parentWorkspace: string, forkId: string) {
   let failedPolls = 0;
+  let lastStep: string | undefined;
   while (true) {
     let result:
       | Awaited<ReturnType<typeof wmill.getForkCreationStatus>>
@@ -47,6 +48,10 @@ async function waitForForkCreation(parentWorkspace: string, forkId: string) {
       if (exists) return;
       if (++failedPolls >= 10) throw e;
     }
+    if (result?.status === "running" && result.step && result.step !== lastStep) {
+      lastStep = result.step;
+      log.info(colors.gray(`${lastStep}...`));
+    }
     if (result?.status === "completed") return;
     if (result?.status === "failed") {
       throw new Error(result.error ?? "Unknown error");