fix(cordis): make config reload transactional

packages/host/directory-picker-auto/src/index.ts

@@ -61,11 +61,9 @@ export async function apply(ctx: Context): Promise<void> {
       // nothing is left to unmount or await then.
       const entry = ctx.loader.store[id]
       if (entry === undefined) return
-      const fiber = entry.fiber
-      ctx.loader.remove(id)
-      // remove() only starts the fiber's dispose; join it so the chooser's
-      // unload signals completion only after the backend quiesced.
-      await fiber?.dispose()
+      // remove() disposes the entry transactionally, so the chooser's unload
+      // signals completion only after the backend quiesced.
+      await ctx.loader.remove(id)
     }
   }, 'directory-picker-auto: backend entry')
 }

packages/host/directory-picker-auto/tests/loader-composition.spec.ts

@@ -167,7 +167,7 @@ describe('real Loader composition', () => {
     const { ctx, configPath } = await loadComposition('127.0.0.1')
 
     const backendEntry = [...ctx.loader.entries()].find(entry => entry.options.name === NATIVE)!
-    ctx.loader.remove(backendEntry.id)
+    await ctx.loader.remove(backendEntry.id)
     const autoEntry = [...ctx.loader.entries()].find(entry => entry.options.name === AUTO)!
     await expect(autoEntry.fiber!.dispose()).resolves.not.toThrow()
     expect(entryNames(ctx)).not.toContain(NATIVE)