feat(client): inject slot declaration lifetimes

packages/host/directory-picker-native/src/client/index.ts

@@ -7,7 +7,6 @@
  * both sides of the native interaction with one cordis.yml row; no client
  * code branches on a capability kind.
  */
-import { deferGroupRegistration } from '@deepseek-ai/dsh-client-ui-slots'
 import type { ClientContext } from '@deepseek-ai/dsh-client-runtime/client'
 // Type-only: pulls the SlotMap merge declaring the directory-flow holes.
 import type {} from '@deepseek-ai/dsh-client-ui-workspace/client'
@@ -20,22 +19,22 @@ export const inject = ['slots', 'workspaces']
 
 /**
  * Client plugin body: register the renderless native flow into both
- * directory-flow holes (declaration-aware deferral — the declaring
- * ui-workspace entries may activate later, and an HMR collapse re-declares).
+ * directory-flow holes through `slots.inject()` because the ui-workspace
+ * entries may activate later or replace their declarations.
  * @param ctx - client root context.
  */
 export function apply(ctx: ClientContext): void {
   const injected = (): NativeFlowInjected => ({ pick: () => ctx.workspaces.pickDirectory() })
-  ctx.effect(() => {
-    // One occupant, both holes, as a unit: construction or late conflicts
-    // (holes declared after rival providers activated) roll the whole pair
-    // back and fail loud — semantics owned by deferGroupRegistration.
-    const group = deferGroupRegistration(
-      ctx.slots,
-      ['conversation.hero.workspace.directoryFlow', 'sidebar.workspaces.directoryFlow'] as const,
-      NativeDirectoryFlow,
-      name => ctx.slots.register({ name, inject: injected }, NativeDirectoryFlow),
-    )
-    return () => { group.dispose() }
-  }, 'directory-picker-native: flow registrations')
+  // Both declaration lifetimes must be live before the pair installs; the
+  // generator makes the two registrations one transactional effect. The
+  // outer/inner nesting order is arbitrary; neither hole has precedence.
+  ctx.slots.inject('conversation.hero.workspace.directoryFlow', () =>
+    ctx.slots.inject('sidebar.workspaces.directoryFlow', function* () {
+      yield ctx.slots.register({
+        name: 'conversation.hero.workspace.directoryFlow', inject: injected,
+      }, NativeDirectoryFlow)
+      yield ctx.slots.register({
+        name: 'sidebar.workspaces.directoryFlow', inject: injected,
+      }, NativeDirectoryFlow)
+    }))
 }