Move include_assets-only specs to the 'bundle' lifecycle

include_assets is conceptually a bundle-time step: it copies extension
assets into the bundle output and (for some specs) emits manifest.json.
It has no role in producing local build artifacts.

For the 5 specs whose only client step is include_assets — admin,
admin_link, channel, flow_template, order_attribution_config — move the
group from 'build' to 'bundle'. After this, `shopify app build` is a
no-op for these extension types; they run during dev/deploy as before.

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

Author: isaacroldan

packages/app/src/cli/models/extensions/specifications/admin.ts

@@ -43,7 +43,7 @@ const adminSpecificationSpec = createExtensionSpecification<AdminConfigType>({
   },
   clientSteps: [
     {
-      lifecycle: 'build',
+      lifecycle: 'bundle',
       steps: [
         {
           id: 'hosted_app_copy_files',

packages/app/src/cli/models/extensions/specifications/admin_link.test.ts

@@ -52,7 +52,7 @@ describe('admin_link', async () => {
       const extension = await getTestAdminLink(tmpDir)
       const clientSteps = extension.specification.clientSteps!
       expect(clientSteps).toHaveLength(1)
-      expect(clientSteps[0]!.lifecycle).toBe('build')
+      expect(clientSteps[0]!.lifecycle).toBe('bundle')
 
       const steps = clientSteps[0]!.steps
       expect(steps).toHaveLength(1)

packages/app/src/cli/models/extensions/specifications/admin_link.ts

@@ -6,7 +6,7 @@ const adminLinkSpec = createContractBasedModuleSpecification({
   experience: 'extension',
   clientSteps: [
     {
-      lifecycle: 'build',
+      lifecycle: 'bundle',
       steps: [
         {
           id: 'include-admin-link-assets',

packages/app/src/cli/models/extensions/specifications/channel.ts

@@ -9,7 +9,7 @@ const channelSpecificationSpec = createContractBasedModuleSpecification({
   experience: 'extension',
   clientSteps: [
     {
-      lifecycle: 'build',
+      lifecycle: 'bundle',
       steps: [
         {
           id: 'copy-files',

packages/app/src/cli/models/extensions/specifications/flow_template.ts

@@ -51,7 +51,7 @@ const flowTemplateSpec = createExtensionSpecification({
   appModuleFeatures: (_) => ['ui_preview'],
   clientSteps: [
     {
-      lifecycle: 'build',
+      lifecycle: 'bundle',
       steps: [
         {
           id: 'copy-files',

packages/app/src/cli/models/extensions/specifications/order_attribution_config.ts

@@ -9,7 +9,7 @@ const orderAttributionConfigSpec = createContractBasedModuleSpecification({
   experience: 'extension',
   clientSteps: [
     {
-      lifecycle: 'build',
+      lifecycle: 'bundle',
       steps: [
         {
           id: 'copy-files',