feat(reports): English edition in the reader — projection, fact tables, charts, export, snapshot v2, route, language switch

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N4f2nya58RoRu4yEmJgRGE

frontend/src/app/api/reports/[reportId]/route.ts

@@ -6,6 +6,8 @@ import {
   resolveReportRead,
 } from "@/lib/personal-report-route-core";
 import { safeParseServerReportDocument } from "@/lib/personal-report-contract.server";
+import { readLongformSnapshot, type LongformSnapshotReader } from "@/lib/personal-report-longform-snapshot";
+import type { EnglishEditionRead } from "@/lib/personal-report-route-core";
 import {
   LONGFORM_APPENDIX_TABLE,
   parseLongformAppendixRow,
@@ -49,6 +51,7 @@ async function resolvePersistenceForUser() {
       jobs: null,
       listSections: undefined,
       loadLongformAppendix: undefined,
+      loadLongformEnglish: undefined,
     };
   }
   const persistence = createSupabasePersonalReportService(supabase);
@@ -84,12 +87,21 @@ async function resolvePersistenceForUser() {
         markdown: row.markdown,
       };
     },
+    loadLongformEnglish: async (input: Readonly<{ userId: string; reportId: string; requestId: string }>): Promise<EnglishEditionRead> => {
+      const stored = await readLongformSnapshot(supabase as unknown as LongformSnapshotReader, input);
+      if (stored?.status !== "ready") return { status: "legacy" };
+      const snapshot = stored.snapshot;
+      if (snapshot.version === 1) return { status: "legacy" };
+      return snapshot.english
+        ? { status: "ready", markdown: snapshot.english.markdown, factTables: snapshot.english.factTables }
+        : { status: "unavailable" };
+    },
   };
 }
 
 export async function GET(request: Request, context: RouteContext) {
   try {
-    const { userId, persistence, jobs, listSections, loadLongformAppendix } = await resolvePersistenceForUser();
+    const { userId, persistence, jobs, listSections, loadLongformAppendix, loadLongformEnglish } = await resolvePersistenceForUser();
     const { reportId } = await context.params;
     if (!uuidPattern.test(reportId)) {
       return NextResponse.json(
@@ -116,6 +128,7 @@ export async function GET(request: Request, context: RouteContext) {
       jobs: jobs ?? undefined,
       listSections,
       loadLongformAppendix,
+      loadLongformEnglish,
       validateReadyDocument: (document) => {
         const parsed = safeParseServerReportDocument(document);
         return parsed.ok