3 changed files with 684 additions and 0 deletions
@@ -174,6 +174,7 @@ import {
  registrationFieldError,
 } from "./registration-errors.js";
 import type { RegistrationService } from "./registration.js";
+import type { AssetPreviewGrantService } from "./preview-grants.js";
 import type { RecentAssetService } from "./recent-assets.js";
 import type { AmapAdapter } from "./amap-adapter.js";
 import { ModelConfigurationError } from "./model-configuration.js";
@@ -212,6 +213,7 @@ export interface CreateAppOptions {
    resourceId: string;
    userId: string;
  }) => boolean | Promise<boolean>;
+  previewGrants?: AssetPreviewGrantService;
  privateAssetAdminAuthorizer?: (input: {
    adminUserId: string;
    ownerId: string;
@@ -871,6 +873,13 @@ export async function createApp(options: CreateAppOptions = {}) {
      const session = token ? options.registration.readUserSession(token) : undefined;
      if (!session) return reply.code(401).send(createErrorEnvelope({ code: "AUTH_SESSION_INVALID", correlationId: request.id }));
      const { resourceVersion } = request.params as { resourceVersion: string };
+      if (options.previewGrants) {
+        const manifest = options.previewGrants.projectManifest({ releaseVersion: resourceVersion, userId: session.userId });
+        if (!manifest) return reply.code(404).send();
+        reply.header("Cache-Control", "private, no-store");
+        reply.header("Vary", "Cookie");
+        return manifest;
+      }
      const available = options.assetReleases?.project("internal_preview_asset", resourceVersion);
      if (!available || !options.previewAssetAuthorizer) return reply.code(404).send();
      const authorizedIds: string[] = [];
@@ -901,6 +910,19 @@ export async function createApp(options: CreateAppOptions = {}) {
      const session = token ? options.registration.readUserSession(token) : undefined;
      if (!session) return reply.code(401).send(createErrorEnvelope({ code: "AUTH_SESSION_INVALID", correlationId: request.id }));
      const { assetId, resourceVersion } = request.params as { assetId: string; resourceVersion: string };
+      if (options.previewGrants) {
+        const resource = options.previewGrants.readManifestItem({
+          manifestItemId: assetId,
+          releaseVersion: resourceVersion,
+          userId: session.userId,
+        });
+        if (!resource) return reply.code(404).send();
+        reply.type(resource.mimeType);
+        reply.header("Cache-Control", "private, no-store");
+        reply.header("Content-Disposition", "inline");
+        reply.header("Vary", "Cookie");
+        return resource.bytes;
+      }
      const authorized = await options.previewAssetAuthorizer?.({ resourceId: assetId, releaseVersion: resourceVersion, userId: session.userId });
      const resource = authorized ? options.assetReleases?.read("internal_preview_asset", resourceVersion, assetId) : undefined;
      if (!resource) return reply.code(404).send();
@@ -0,0 +1,483 @@
+import { createHash, randomUUID } from "node:crypto";
+
+import type {
+  AssetReleaseManifestItem,
+  AssetReleaseManifestProjection,
+  AssetReleaseReader,
+} from "@dada/asset-release-manifest";
+
+import { auditRetentionMilliseconds, serializeAuditSummary } from "./audit-policy.js";
+import type { RegistrationService } from "./registration.js";
+
+export type PreviewBatchStatus = "active" | "closed";
+export type PreviewGrantStatus = "active" | "revoked" | "expired";
+
+export interface PreviewBatchView {
+  batchId: string;
+  createdAt: number;
+  createdBy: string;
+  name: string;
+  status: PreviewBatchStatus;
+}
+
+export interface PreviewGrantView {
+  batchId: string;
+  expiresAt: number;
+  grantId: string;
+  grantedAt: number;
+  grantedBy: string;
+  status: PreviewGrantStatus;
+  userId: string;
+}
+
+export class PreviewGrantError extends Error {
+  constructor(
+    public readonly reason:
+      | "admin_invalid"
+      | "batch_closed"
+      | "batch_not_found"
+      | "grant_not_found"
+      | "invalid_expiry"
+      | "invalid_request"
+      | "resource_not_found"
+      | "user_not_eligible",
+  ) {
+    super(reason);
+    this.name = "PreviewGrantError";
+  }
+}
+
+interface PreviewGrantServiceOptions {
+  assetReleases: AssetReleaseReader;
+  clock?: () => number;
+  registration: RegistrationService;
+}
+
+interface PreviewManifestItemMapping {
+  releaseVersion: string;
+  resourceId: string;
+  userId: string;
+}
+
+function isUuid(value: string) {
+  return /^[0-9a-f]{8}-[0-9a-f]{4}-4[0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i.test(value);
+}
+
+function assertText(value: string, name: string) {
+  const normalized = value.trim();
+  if (!normalized || normalized.length > 160) throw new PreviewGrantError("invalid_request");
+  if (name === "batchId" && !isUuid(normalized)) throw new PreviewGrantError("invalid_request");
+  return normalized;
+}
+
+function manifestHash(items: readonly AssetReleaseManifestItem[], releaseVersion: string) {
+  return createHash("sha256")
+    .update(JSON.stringify({
+      items,
+      release_version: releaseVersion,
+      schema_version: "AssetReleaseManifest/v1",
+    }))
+    .digest("hex");
+}
+
+/**
+ * Owns the P0-A preview grant state. Preview URLs are deliberately ephemeral:
+ * the random item id is kept only in this process and every read rechecks the
+ * persisted grant, so revocation and expiry take effect without cache busting.
+ */
+export class AssetPreviewGrantService {
+  readonly database: RegistrationService["database"];
+  readonly options: Required<Pick<PreviewGrantServiceOptions, "clock">> & PreviewGrantServiceOptions;
+  private readonly itemMappings = new Map<string, PreviewManifestItemMapping>();
+
+  constructor(options: PreviewGrantServiceOptions) {
+    this.database = options.registration.database;
+    this.options = { ...options, clock: options.clock ?? Date.now };
+    this.migrate();
+  }
+
+  createBatch(input: { adminUserId: string; batchId?: string; name: string }): PreviewBatchView {
+    const adminUserId = assertText(input.adminUserId, "adminUserId");
+    const name = assertText(input.name, "name");
+    const batchId = input.batchId ? assertText(input.batchId, "batchId") : randomUUID();
+    const now = this.options.clock();
+    this.assertAdmin(adminUserId, now);
+    this.immediate(() => {
+      this.database.prepare(`
+        INSERT INTO test_batches (batch_id, name, status, created_by, created_at, closed_at)
+        VALUES (?, ?, 'active', ?, ?, NULL)
+      `).run(batchId, name, adminUserId, now);
+      this.audit({
+        actorRef: adminUserId,
+        afterSummary: { batch_id: batchId, status: "active" },
+        beforeSummary: null,
+        operationType: "preview_batch_create",
+        targetRef: batchId,
+        targetType: "preview_batch",
+      }, now);
+    });
+    return { batchId, createdAt: now, createdBy: adminUserId, name, status: "active" };
+  }
+
+  closeBatch(input: { adminUserId: string; batchId: string }): PreviewBatchView {
+    const adminUserId = assertText(input.adminUserId, "adminUserId");
+    const batchId = assertText(input.batchId, "batchId");
+    const now = this.options.clock();
+    this.assertAdmin(adminUserId, now);
+    return this.immediate(() => {
+      const batch = this.readBatch(batchId);
+      if (!batch) throw new PreviewGrantError("batch_not_found");
+      if (batch.status === "active") {
+        this.database.prepare("UPDATE test_batches SET status = 'closed', closed_at = ? WHERE batch_id = ?").run(now, batchId);
+        this.audit({
+          actorRef: adminUserId,
+          afterSummary: { batch_id: batchId, status: "closed" },
+          beforeSummary: { batch_id: batchId, status: batch.status },
+          operationType: "preview_batch_close",
+          targetRef: batchId,
+          targetType: "preview_batch",
+        }, now);
+      }
+      return { ...batch, status: "closed" as const };
+    });
+  }
+
+  addBatchItems(input: {
+    adminUserId: string;
+    batchId: string;
+    releaseVersion: string;
+    resourceIds: readonly string[];
+  }) {
+    const adminUserId = assertText(input.adminUserId, "adminUserId");
+    const batchId = assertText(input.batchId, "batchId");
+    const releaseVersion = assertText(input.releaseVersion, "releaseVersion");
+    const resourceIds = [...new Set(input.resourceIds.map((resourceId) => assertText(resourceId, "resourceId")))];
+    if (resourceIds.length === 0) throw new PreviewGrantError("invalid_request");
+    const now = this.options.clock();
+    this.assertAdmin(adminUserId, now);
+    for (const resourceId of resourceIds) {
+      if (!this.options.assetReleases.read("internal_preview_asset", releaseVersion, resourceId)) {
+        throw new PreviewGrantError("resource_not_found");
+      }
+    }
+    this.immediate(() => {
+      const batch = this.readBatch(batchId);
+      if (!batch) throw new PreviewGrantError("batch_not_found");
+      if (batch.status !== "active") throw new PreviewGrantError("batch_closed");
+      const insert = this.database.prepare(`
+        INSERT OR IGNORE INTO test_batch_items (test_batch_id, release_version, resource_id)
+        VALUES (?, ?, ?)
+      `);
+      for (const resourceId of resourceIds) insert.run(batchId, releaseVersion, resourceId);
+      this.audit({
+        actorRef: adminUserId,
+        afterSummary: { batch_id: batchId, item_count: resourceIds.length, release_version: releaseVersion },
+        beforeSummary: null,
+        operationType: "preview_batch_items_add",
+        targetRef: batchId,
+        targetType: "preview_batch",
+      }, now);
+    });
+    return { batchId, releaseVersion, resourceIds };
+  }
+
+  grant(input: {
+    adminUserId: string;
+    batchId: string;
+    expiresAt: number;
+    userId: string;
+  }): PreviewGrantView {
+    const adminUserId = assertText(input.adminUserId, "adminUserId");
+    const batchId = assertText(input.batchId, "batchId");
+    const userId = assertText(input.userId, "userId");
+    if (!isUuid(userId)) throw new PreviewGrantError("invalid_request");
+    const now = this.options.clock();
+    if (!Number.isSafeInteger(input.expiresAt) || input.expiresAt <= now) throw new PreviewGrantError("invalid_expiry");
+    this.assertAdmin(adminUserId, now);
+    return this.immediate(() => {
+      const batch = this.readBatch(batchId);
+      if (!batch) throw new PreviewGrantError("batch_not_found");
+      if (batch.status !== "active") throw new PreviewGrantError("batch_closed");
+      const user = this.database.prepare("SELECT role, status FROM users WHERE user_id = ?").get(userId) as { role: string; status: string } | undefined;
+      if (!user || user.role !== "user" || user.status !== "active") throw new PreviewGrantError("user_not_eligible");
+      const grantId = randomUUID();
+      this.database.prepare(`
+        INSERT INTO asset_preview_grants (
+          grant_id, user_id, test_batch_id, granted_by, granted_at, expires_at, status
+        ) VALUES (?, ?, ?, ?, ?, ?, 'active')
+      `).run(grantId, userId, batchId, adminUserId, now, input.expiresAt);
+      this.audit({
+        actorRef: adminUserId,
+        afterSummary: { batch_id: batchId, expires_at: input.expiresAt, grant_id: grantId, status: "active", user_id: userId },
+        beforeSummary: null,
+        operationType: "preview_grant_create",
+        targetRef: grantId,
+        targetType: "preview_grant",
+      }, now);
+      return {
+        batchId,
+        expiresAt: input.expiresAt,
+        grantId,
+        grantedAt: now,
+        grantedBy: adminUserId,
+        status: "active" as const,
+        userId,
+      };
+    });
+  }
+
+  revoke(input: { adminUserId: string; grantId: string }): PreviewGrantView {
+    const adminUserId = assertText(input.adminUserId, "adminUserId");
+    const grantId = assertText(input.grantId, "grantId");
+    const now = this.options.clock();
+    this.assertAdmin(adminUserId, now);
+    return this.immediate(() => {
+      this.expireDue(now);
+      const grant = this.readGrant(grantId);
+      if (!grant) throw new PreviewGrantError("grant_not_found");
+      if (grant.status === "active") {
+        this.database.prepare("UPDATE asset_preview_grants SET status = 'revoked' WHERE grant_id = ? AND status = 'active'").run(grantId);
+        this.audit({
+          actorRef: adminUserId,
+          afterSummary: { grant_id: grantId, status: "revoked" },
+          beforeSummary: { grant_id: grantId, status: grant.status },
+          operationType: "preview_grant_revoke",
+          targetRef: grantId,
+          targetType: "preview_grant",
+        }, now);
+      }
+      return { ...grant, status: "revoked" as const };
+    });
+  }
+
+  listBatches(input: { adminUserId: string }): PreviewBatchView[] {
+    const adminUserId = assertText(input.adminUserId, "adminUserId");
+    this.assertAdmin(adminUserId, this.options.clock());
+    return (this.database.prepare(`
+      SELECT batch_id, name, status, created_by, created_at
+      FROM test_batches ORDER BY created_at DESC, batch_id DESC
+    `).all() as Array<{ batch_id: string; created_at: number; created_by: string; name: string; status: PreviewBatchStatus }>).map((row) => ({
+      batchId: row.batch_id,
+      createdAt: row.created_at,
+      createdBy: row.created_by,
+      name: row.name,
+      status: row.status,
+    }));
+  }
+
+  listGrants(input: { adminUserId: string; batchId?: string; userId?: string }): PreviewGrantView[] {
+    const adminUserId = assertText(input.adminUserId, "adminUserId");
+    this.assertAdmin(adminUserId, this.options.clock());
+    const batchId = input.batchId ? assertText(input.batchId, "batchId") : undefined;
+    const userId = input.userId ? assertText(input.userId, "userId") : undefined;
+    const now = this.options.clock();
+    return this.immediate(() => {
+      this.expireDue(now);
+      const rows = this.database.prepare(`
+        SELECT grant_id, user_id, test_batch_id, granted_by, granted_at, expires_at, status
+        FROM asset_preview_grants
+        WHERE (? IS NULL OR test_batch_id = ?) AND (? IS NULL OR user_id = ?)
+        ORDER BY granted_at DESC, grant_id DESC
+      `).all(batchId ?? null, batchId ?? null, userId ?? null, userId ?? null) as Array<{
+        expires_at: number; grant_id: string; granted_at: number; granted_by: string;
+        status: PreviewGrantStatus; test_batch_id: string; user_id: string;
+      }>;
+      return rows.map((row) => ({
+        batchId: row.test_batch_id,
+        expiresAt: row.expires_at,
+        grantId: row.grant_id,
+        grantedAt: row.granted_at,
+        grantedBy: row.granted_by,
+        status: row.status,
+        userId: row.user_id,
+      }));
+    });
+  }
+
+  projectManifest(input: { releaseVersion: string; userId: string }): AssetReleaseManifestProjection | undefined {
+    const releaseVersion = assertText(input.releaseVersion, "releaseVersion");
+    const userId = assertText(input.userId, "userId");
+    const base = this.options.assetReleases.project("internal_preview_asset", releaseVersion);
+    if (!base) return undefined;
+    const authorized = base.items.filter((item) => this.authorizeAsset({ releaseVersion, resourceId: item.resource_id, userId }));
+    if (authorized.length === 0) return undefined;
+    const items = authorized.map((item) => {
+      const manifestItemId = randomUUID();
+      const mapped: AssetReleaseManifestItem = {
+        ...item,
+        resource_id: manifestItemId,
+        url: `/api/v1/assets/preview/${releaseVersion}/${manifestItemId}`,
+      };
+      this.itemMappings.set(manifestItemId, {
+        releaseVersion,
+        resourceId: item.resource_id,
+        userId,
+      });
+      return mapped;
+    });
+    return Object.freeze({
+      items: Object.freeze(items.map((item) => Object.freeze(item))),
+      manifest_sha256: manifestHash(items, releaseVersion),
+      release_version: releaseVersion,
+      schema_version: "AssetReleaseManifest/v1" as const,
+    });
+  }
+
+  authorizeAsset(input: { releaseVersion: string; resourceId: string; userId: string }) {
+    const releaseVersion = assertText(input.releaseVersion, "releaseVersion");
+    const resourceId = assertText(input.resourceId, "resourceId");
+    const userId = assertText(input.userId, "userId");
+    const now = this.options.clock();
+    return this.immediate(() => {
+      this.expireDue(now);
+      const user = this.database.prepare("SELECT role, status FROM users WHERE user_id = ?").get(userId) as { role: string; status: string } | undefined;
+      if (!user || user.role !== "user" || user.status !== "active") return false;
+      const row = this.database.prepare(`
+        SELECT 1 AS authorized
+        FROM asset_preview_grants g
+        JOIN test_batch_items i ON i.test_batch_id = g.test_batch_id
+        WHERE g.user_id = ? AND g.status = 'active' AND g.expires_at > ?
+          AND i.release_version = ? AND i.resource_id = ?
+        LIMIT 1
+      `).get(userId, now, releaseVersion, resourceId) as { authorized: 1 } | undefined;
+      return Boolean(row);
+    });
+  }
+
+  readManifestItem(input: { manifestItemId: string; releaseVersion: string; userId: string }) {
+    const manifestItemId = assertText(input.manifestItemId, "manifestItemId");
+    const releaseVersion = assertText(input.releaseVersion, "releaseVersion");
+    const userId = assertText(input.userId, "userId");
+    const mapping = this.itemMappings.get(manifestItemId);
+    if (!mapping || mapping.releaseVersion !== releaseVersion || mapping.userId !== userId) return undefined;
+    if (!this.authorizeAsset({ releaseVersion, resourceId: mapping.resourceId, userId })) {
+      this.itemMappings.delete(manifestItemId);
+      return undefined;
+    }
+    const resource = this.options.assetReleases.read("internal_preview_asset", releaseVersion, mapping.resourceId);
+    return resource ? { ...resource, resourceId: manifestItemId } : undefined;
+  }
+
+  private migrate() {
+    this.database.exec(`
+      CREATE TABLE IF NOT EXISTS test_batches (
+        batch_id TEXT PRIMARY KEY,
+        name TEXT NOT NULL CHECK (length(name) BETWEEN 1 AND 160),
+        status TEXT NOT NULL CHECK (status IN ('active', 'closed')),
+        created_by TEXT NOT NULL REFERENCES users(user_id),
+        created_at INTEGER NOT NULL,
+        closed_at INTEGER
+      );
+      CREATE TABLE IF NOT EXISTS test_batch_items (
+        test_batch_id TEXT NOT NULL REFERENCES test_batches(batch_id),
+        release_version TEXT NOT NULL,
+        resource_id TEXT NOT NULL,
+        PRIMARY KEY (test_batch_id, release_version, resource_id)
+      );
+      CREATE TABLE IF NOT EXISTS asset_preview_grants (
+        grant_id TEXT PRIMARY KEY,
+        user_id TEXT NOT NULL REFERENCES users(user_id),
+        test_batch_id TEXT NOT NULL REFERENCES test_batches(batch_id),
+        granted_by TEXT NOT NULL REFERENCES users(user_id),
+        granted_at INTEGER NOT NULL,
+        expires_at INTEGER NOT NULL CHECK (expires_at > granted_at),
+        status TEXT NOT NULL CHECK (status IN ('active', 'revoked', 'expired'))
+      );
+      CREATE INDEX IF NOT EXISTS asset_preview_grants_user_status
+        ON asset_preview_grants(user_id, status, expires_at);
+    `);
+  }
+
+  private immediate<T>(action: () => T): T {
+    this.database.exec("BEGIN IMMEDIATE");
+    try {
+      const value = action();
+      this.database.exec("COMMIT");
+      return value;
+    } catch (error) {
+      if (this.database.inTransaction) this.database.exec("ROLLBACK");
+      throw error;
+    }
+  }
+
+  private assertAdmin(adminUserId: string, now: number) {
+    const admin = this.database.prepare(`
+      SELECT 1 AS allowed FROM users u JOIN admin_access a ON a.user_id = u.user_id
+      WHERE u.user_id = ? AND u.role = 'super_admin' AND u.status = 'active' AND a.allowed = 1
+    `).get(adminUserId) as { allowed: 1 } | undefined;
+    if (!admin) throw new PreviewGrantError("admin_invalid");
+    void now;
+  }
+
+  private readBatch(batchId: string): PreviewBatchView | undefined {
+    const row = this.database.prepare(`
+      SELECT batch_id, name, status, created_by, created_at
+      FROM test_batches WHERE batch_id = ?
+    `).get(batchId) as { batch_id: string; created_at: number; created_by: string; name: string; status: PreviewBatchStatus } | undefined;
+    return row ? {
+      batchId: row.batch_id,
+      createdAt: row.created_at,
+      createdBy: row.created_by,
+      name: row.name,
+      status: row.status,
+    } : undefined;
+  }
+
+  private readGrant(grantId: string): PreviewGrantView | undefined {
+    const row = this.database.prepare(`
+      SELECT grant_id, user_id, test_batch_id, granted_by, granted_at, expires_at, status
+      FROM asset_preview_grants WHERE grant_id = ?
+    `).get(grantId) as {
+      expires_at: number; grant_id: string; granted_at: number; granted_by: string;
+      status: PreviewGrantStatus; test_batch_id: string; user_id: string;
+    } | undefined;
+    return row ? {
+      batchId: row.test_batch_id,
+      expiresAt: row.expires_at,
+      grantId: row.grant_id,
+      grantedAt: row.granted_at,
+      grantedBy: row.granted_by,
+      status: row.status,
+      userId: row.user_id,
+    } : undefined;
+  }
+
+  private expireDue(now: number) {
+    const rows = this.database.prepare(`
+      SELECT grant_id, user_id, test_batch_id FROM asset_preview_grants
+      WHERE status = 'active' AND expires_at <= ?
+    `).all(now) as Array<{ grant_id: string; test_batch_id: string; user_id: string }>;
+    if (rows.length === 0) return;
+    this.database.prepare("UPDATE asset_preview_grants SET status = 'expired' WHERE status = 'active' AND expires_at <= ?").run(now);
+    for (const row of rows) {
+      this.audit({
+        actorRef: "preview_grant_expiry",
+        afterSummary: { grant_id: row.grant_id, status: "expired" },
+        beforeSummary: { grant_id: row.grant_id, status: "active" },
+        operationType: "preview_grant_expire",
+        targetRef: row.grant_id,
+        targetType: "preview_grant",
+      }, now, "system");
+    }
+  }
+
+  private audit(input: {
+    actorRef: string;
+    afterSummary: Record<string, unknown> | null;
+    beforeSummary: Record<string, unknown> | null;
+    operationType: string;
+    targetRef: string;
+    targetType: string;
+  }, now: number, actorType: "super_admin" | "system" = "super_admin") {
+    this.database.prepare(`
+      INSERT INTO admin_operation_logs (
+        log_id, actor_type, actor_ref, operation_type, target_type, target_ref,
+        result, before_summary, after_summary, occurred_at, expires_at
+      ) VALUES (?, ?, ?, ?, ?, ?, 'succeeded', ?, ?, ?, ?)
+    `).run(
+      randomUUID(), actorType, input.actorRef, input.operationType, input.targetType, input.targetRef,
+      serializeAuditSummary(input.beforeSummary), serializeAuditSummary(input.afterSummary),
+      now, now + auditRetentionMilliseconds,
+    );
+  }
+}
@@ -0,0 +1,179 @@
+import { randomUUID } from "node:crypto";
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+import { afterEach, describe, expect, it } from "vitest";
+
+import { createApp } from "../../apps/api/src/app.js";
+import { AssetPreviewGrantService } from "../../apps/api/src/preview-grants.js";
+import { RegistrationService } from "../../apps/api/src/registration.js";
+import { MockResendAdapter } from "../../apps/api/src/resend-adapter.js";
+import { createAssetReleaseManifest } from "../../packages/asset-release-manifest/src/index.js";
+
+const start = Date.parse("2026-08-04T08:00:00.000Z");
+const releaseVersion = "asset-20260804.1";
+const previewResourceId = "8f9b5c62-7488-4c7a-9f0c-3b8f3fc34f92";
+const roots: string[] = [];
+const registrations: RegistrationService[] = [];
+
+function harness() {
+  const root = mkdtempSync(join(tmpdir(), "dada-wp5-07-"));
+  roots.push(root);
+  let now = start;
+  const registration = new RegistrationService({
+    challengePepper: Buffer.alloc(32, 0x71),
+    clock: () => now,
+    currentPrivacyNoticeVersion: "p0a-registration-notice-v1",
+    databasePath: join(root, "dada.sqlite3"),
+    invitePepper: Buffer.alloc(32, 0x72),
+    resend: new MockResendAdapter(),
+    sessionPepper: Buffer.alloc(32, 0x73),
+  });
+  registrations.push(registration);
+  const userId = randomUUID();
+  registration.database.prepare(`
+    INSERT INTO users (
+      user_id, normalized_email, role, status, counts_toward_stage_limit,
+      registration_id, created_at
+    ) VALUES (?, ?, 'user', 'active', 1, ?, ?)
+  `).run(userId, `${userId}@example.invalid`, randomUUID(), start);
+  registration.database.prepare(`
+    INSERT INTO user_profiles (user_id, creator_name, social_id)
+    VALUES (?, 'Preview User', '@preview_user')
+  `).run(userId);
+  registration.database.prepare(`
+    INSERT INTO credit_accounts (user_id, available_balance, reserved_balance, updated_at)
+    VALUES (?, 10, 0, ?)
+  `).run(userId, start);
+  const adminId = randomUUID();
+  registration.database.prepare(`
+    INSERT INTO users (
+      user_id, normalized_email, role, status, counts_toward_stage_limit,
+      registration_id, created_at
+    ) VALUES (?, ?, 'super_admin', 'active', 0, ?, ?)
+  `).run(adminId, `${adminId}@example.invalid`, randomUUID(), start);
+  registration.database.prepare("INSERT INTO admin_access (user_id, allowed) VALUES (?, 1)").run(adminId);
+  const assetReleases = createAssetReleaseManifest({
+    items: [{
+      access_class: "internal_preview_asset",
+      content: Buffer.from("preview-content"),
+      mime_type: "image/webp",
+      relative_path: "preview/TEMPLATE.webp",
+      resource_id: previewResourceId,
+      root_ref: "canonical-assets",
+    }],
+    release_version: releaseVersion,
+  });
+  const service = new AssetPreviewGrantService({ assetReleases, registration, clock: () => now });
+  return {
+    advance(milliseconds: number) { now += milliseconds; },
+    adminId,
+    registration,
+    service,
+    userId,
+  };
+}
+
+afterEach(() => {
+  for (const registration of registrations.splice(0)) registration.close();
+  for (const root of roots.splice(0)) rmSync(root, { force: true, recursive: true });
+});
+
+describe("TASK-WP5-07 internal preview grant lifecycle", () => {
+  it("keeps ordinary role, returns randomized manifest item IDs, and blocks revoked/expired grants", () => {
+    const test = harness();
+    const batch = test.service.createBatch({
+      name: "WP5 preview batch",
+      adminUserId: test.adminId,
+    });
+    test.service.addBatchItems({
+      adminUserId: test.adminId,
+      batchId: batch.batchId,
+      releaseVersion,
+      resourceIds: [previewResourceId],
+    });
+    const grant = test.service.grant({
+      adminUserId: test.adminId,
+      batchId: batch.batchId,
+      expiresAt: start + 60_000,
+      userId: test.userId,
+    });
+
+    const firstManifest = test.service.projectManifest({ releaseVersion, userId: test.userId });
+    expect(firstManifest?.items).toHaveLength(1);
+    expect(firstManifest?.items[0].resource_id).not.toBe(previewResourceId);
+    expect(firstManifest?.items[0].url).toContain(firstManifest?.items[0].resource_id ?? "");
+    expect(test.service.readManifestItem({
+      manifestItemId: firstManifest!.items[0].resource_id,
+      releaseVersion,
+      userId: test.userId,
+    })?.bytes).toEqual(Buffer.from("preview-content"));
+    expect(test.registration.database.prepare("SELECT role FROM users WHERE user_id = ?").get(test.userId)).toEqual({ role: "user" });
+
+    test.service.revoke({ adminUserId: test.adminId, grantId: grant.grantId });
+    expect(test.service.projectManifest({ releaseVersion, userId: test.userId })).toBeUndefined();
+    expect(test.service.readManifestItem({
+      manifestItemId: firstManifest!.items[0].resource_id,
+      releaseVersion,
+      userId: test.userId,
+    })).toBeUndefined();
+
+    const secondGrant = test.service.grant({
+      adminUserId: test.adminId,
+      batchId: batch.batchId,
+      expiresAt: start + 10_000,
+      userId: test.userId,
+    });
+    expect(secondGrant.status).toBe("active");
+    test.advance(10_001);
+    expect(test.service.projectManifest({ releaseVersion, userId: test.userId })).toBeUndefined();
+    expect(test.registration.database.prepare("SELECT status FROM asset_preview_grants WHERE grant_id = ?").get(secondGrant.grantId)).toEqual({ status: "expired" });
+
+    test.registration.database.prepare("UPDATE users SET status = 'active' WHERE user_id = ?").run(test.userId);
+    test.service.grant({
+      adminUserId: test.adminId,
+      batchId: batch.batchId,
+      expiresAt: start + 120_000,
+      userId: test.userId,
+    });
+    test.registration.changeUserStatus(test.userId, "suspended");
+    expect(test.service.projectManifest({ releaseVersion, userId: test.userId })).toBeUndefined();
+    expect(test.registration.database.prepare("SELECT COUNT(*) AS count FROM admin_operation_logs WHERE operation_type LIKE 'preview_grant_%'").get()).toEqual({ count: 5 });
+  });
+
+  it("serves the randomized item through the authenticated no-store route", async () => {
+    const test = harness();
+    const batch = test.service.createBatch({ name: "WP5 route batch", adminUserId: test.adminId });
+    test.service.addBatchItems({
+      adminUserId: test.adminId,
+      batchId: batch.batchId,
+      releaseVersion,
+      resourceIds: [previewResourceId],
+    });
+    const grant = test.service.grant({ adminUserId: test.adminId, batchId: batch.batchId, expiresAt: start + 60_000, userId: test.userId });
+    const session = test.registration.issueAuthenticatedSession(test.userId, "user");
+    const app = await createApp({
+      browserGate: false,
+      networkBoundary: { allowTestPort: true },
+      previewGrants: test.service,
+      registration: test.registration,
+    });
+    try {
+      const headers = { cookie: `dada_session=${session.sessionToken}`, host: "127.0.0.1:43121", origin: "http://127.0.0.1:43121" };
+      const manifest = await app.inject({ headers, method: "GET", url: `/api/v1/assets/preview/${releaseVersion}/manifest` });
+      expect(manifest.statusCode).toBe(200);
+      const itemId = manifest.json().items[0].resource_id;
+      expect(itemId).not.toBe(previewResourceId);
+      const asset = await app.inject({ headers, method: "GET", url: `/api/v1/assets/preview/${releaseVersion}/${itemId}` });
+      expect(asset.statusCode).toBe(200);
+      expect(asset.headers["cache-control"]).toBe("private, no-store");
+      expect(asset.rawPayload).toEqual(Buffer.from("preview-content"));
+      test.service.revoke({ adminUserId: test.adminId, grantId: grant.grantId });
+      const revoked = await app.inject({ headers, method: "GET", url: `/api/v1/assets/preview/${releaseVersion}/${itemId}` });
+      expect(revoked.statusCode).toBe(404);
+    } finally {
+      await app.close();
+    }
+  });
+});