WIP: open/subscribe repos before anchored cold-start reads (branche, non mergée)

Défaut visé : sur une session verifier fraîche (reconnexion), la lecture ancrée
tape des repos pas encore ouverts dans self.repos → 0 ligne. Nouveau module
`open-repo.ts` : `ensureReposOpen`/`ensureRepoOpen` ouvrent/souscrivent un repo
via la primitive existante `subscribeDoc` (doc_subscribe) et attendent le push
d'état initial (borné, sans polling) AVANT la lecture ancrée. Câblé en amont de
`readUnion` (read-model) et `readScopeIndex` (store-registry). Idempotent par
session (Set des NURI ouverts + Map in-flight ; ré-ouverture si la session
injectée change). No-op si le `ng` injecté n'a pas doc_subscribe (fake unitaire).

État — NON MERGÉ, incomplet :
- AIDE le PROTECTED : la participation remonte au cold-start (mesuré app, timing
  un peu bruité).
- N'ADRESSE PAS l'accueil PUBLIC : `readScopeIndex` de l'index public rend 0 même
  côté écrivain même-session — le fix ouvre le repo mais l'index reste vide. Le
  code d'index lib est prouvé scope-symétrique, donc la cause du public est
  ailleurs (broker/store ou chemin app), À MESURER SOUS BROKER (actuellement
  injoignable). Nécessité du fix elle-même non prouvée en e2e lib (broker down).

gate broker-indépendant : tsc --noEmit propre ; bun test 91 pass (worker).
Inclut le scaffolding e2e de repro reconnexion (broker/run/sdk-entry).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

packages/client/e2e/run.ts

@@ -12,12 +12,17 @@
  * (waitForFunction on a counter), never a blind sleep.
  */
 
+import * as fs from "node:fs";
+import * as os from "node:os";
+import * as path from "node:path";
 import type { Frame, Page, BrowserContext } from "playwright";
 import {
   buildBundle,
   serveHarness,
   ensureWallet,
   launchWalletContext,
+  launchCleanProfileContext,
+  importWalletViaFile,
   setupBrokerPage,
 } from "./broker";
 
@@ -280,6 +285,80 @@ async function main(): Promise<void> {
       const cleared = await sdk<string | null>(frame, "identityClear");
       check("IdentityStore set→get→clear", setr === "@ident-user" && got === "@ident-user" && cleared === null, `set=${setr} get=${got} cleared=${cleared}`);
     });
+
+    // ── reconnection cold-start (real-broker regression) ─────────────────────
+    // Phase 1 (THIS session): seed — create a per-entity doc under (id, protected)
+    // and write a marker triple (`protected` carries participations). Also EXPORT the
+    // wallet `.ngw` so phase 2 can re-import the SAME wallet into a CLEAN browser
+    // profile.
+    //
+    // Phase 2 (the faithful reconnect): import the wallet into a BRAND-NEW empty
+    // profile dir (no local IndexedDB copy of the repos) and open a fresh SDK session
+    // over it — the repos exist on the BROKER but NOT in this profile's local cache,
+    // so this is a true reconnect (not a same-profile relaunch, which masks the gap by
+    // eagerly rehydrating repos from local storage). Then re-read purely from the
+    // wallet and assert the marker comes back.
+    //
+    // FINDING (recorded, see the digest): on THIS SDK/broker version the marker also
+    // comes back WITHOUT the open-before-read heal — the broker-login bootstrap opens
+    // the user's repos before the read (the `rawAnchoredNoOpen` detail below shows the
+    // bare anchored query already resolves rows). So this test is a real-broker
+    // REGRESSION guard for reconnection reads, NOT a fail-without-the-fix proof; the
+    // cold-start the fix targets was diagnosed in the app and does not reproduce
+    // through this harness's login path.
+    console.log("\n── reconnection cold-start (real-broker regression) ──");
+    await step("fresh session (clean profile, same wallet) re-reads a persisted entity doc", async () => {
+      const reconId = "@recon-" + Date.now();
+      const scope = "protected";
+      const seed = await sdk<any>(frame, "reconnectSeed", reconId, scope);
+      check(
+        "seed: entity doc created + listed in the seeding session",
+        seed.listedInSeed.includes(seed.entityNuri),
+        `entity=${String(seed.entityNuri).slice(0, 24)}… listedInSeed=${seed.listedInSeed.length} origSession=${info?.session_id}`,
+      );
+
+      // Export the wallet file and materialize it for the clean-profile import.
+      const exp = await sdk<any>(frame, "exportWalletFile");
+      const ngwPath = path.join(os.tmpdir(), `ng-eventually-recon-${Date.now()}.ngw`);
+      fs.writeFileSync(ngwPath, Buffer.from(exp.b64, "base64"));
+
+      let cleanCtx: BrowserContext | null = null;
+      let cleanDir: string | null = null;
+      let cleanPage: Page | null = null;
+      try {
+        const launched = await launchCleanProfileContext();
+        cleanCtx = launched.ctx;
+        cleanDir = launched.dir;
+        cleanPage = await cleanCtx.newPage();
+        cleanPage.on("pageerror", (e) => console.error("[iframe error:clean]", e.message));
+        cleanPage.on("console", (m) => { if (m.type() === "error") console.error("[iframe console:clean]", m.text()); });
+
+        // Import the SAME wallet into the empty profile (broker-only repos), then open
+        // the SDK page in a fresh broker session over it.
+        await importWalletViaFile(cleanPage, ngwPath);
+        const cleanFrame = await setupBrokerPage(cleanPage, url);
+        await cleanFrame.waitForFunction(() => (window as any).__sdk !== undefined, { timeout: 30000 });
+        await cleanFrame.waitForFunction(() => (window as any).__sdk.status() === "connected", { timeout: 60000 });
+        const cleanInfo = await sdkGet<any>(cleanFrame, "sessionInfo");
+        check(
+          "clean-profile session connected (fresh verifier, broker-only repos)",
+          cleanInfo?.session_id !== undefined && cleanInfo?.session_id !== null,
+          `session=${cleanInfo?.session_id}`,
+        );
+
+        const r = await sdk<any>(cleanFrame, "reconnectRead", reconId, scope, seed.entityNuri, seed.marker);
+        check(
+          "fresh clean-profile session re-reads the persisted marker (reconnection regression)",
+          r.markerPresent === true,
+          `rawAnchoredNoOpen=${r.rawRowCount} listed=${r.listedCount} foundEntity=${r.foundEntity} subjects=${r.subjectCount} markerPresent=${r.markerPresent}`,
+        );
+      } finally {
+        try { if (cleanPage) await cleanPage.close(); } catch { /* ignore */ }
+        try { if (cleanCtx) await cleanCtx.close(); } catch { /* ignore */ }
+        try { if (cleanDir) fs.rmSync(cleanDir, { recursive: true, force: true }); } catch { /* ignore */ }
+        try { fs.rmSync(ngwPath, { force: true }); } catch { /* ignore */ }
+      }
+    });
   } finally {
     try { if (page) await page.close(); } catch { /* ignore */ }
     try { if (ctx) await ctx.close(); } catch { /* ignore */ }