fix: ng-helpers rejoint la surface dev.6, et son faux suit le contrat

e2e/run.ts

@@ -207,7 +207,7 @@ const { check, journey, finish } = declareSuite({
       name: "An index whose inbox cannot be opened leaves a document behind",
       checks: [
         "createIndex refuses when the inbox cannot be opened",
-        "a document was nevertheless created in the owner's public store",
+        "a document was nevertheless created, and its owner still holds it",
         "the leaked document carries a descriptor but accepts no deposit",
       ],
     },
@@ -654,15 +654,20 @@ async function main(): Promise<void> {
           outcome.rejected !== null && outcome.returned === null,
           `rejected=${outcome.rejected} returned=${outcome.returned}`,
         );
+        // WHAT IS OBSERVED HERE, and what is not. There is no call that lists a store any
+        // more, so the leak is found by reading every index document Alice HOLDS and
+        // diffing: that establishes the document survived, not which store it sits in.
+        // `observed` travels with it because an empty answer only means "nothing turned
+        // up" under `success` -- under any other state it means nobody answered.
         check(
-          "a document was nevertheless created in the owner's public store",
-          outcome.appeared.length === 1,
-          `appeared=${JSON.stringify(outcome.appeared)}`,
+          "a document was nevertheless created, and its owner still holds it",
+          outcome.appeared.length === 1 && outcome.observed === "success",
+          `appeared=${JSON.stringify(outcome.appeared)} observed=${outcome.observed}`,
         );
 
         // What the leaked document IS: an index in every respect but the one that makes
-        // it usable. Alice found it in her own store — the only way anyone can, since
-        // `createIndex` threw its reference away.
+        // it usable. Alice found it among the documents she holds -- the only way anyone
+        // can, since `createIndex` threw its reference away.
         const leaked = outcome.appeared[0];
         if (leaked === undefined) {
           check(