rename(phase 1): CapaKraken → Nexus across code, UI, docs, CI

- @capakraken/* → @nexus/* across 12 packages (root + 11 workspaces),
  1551 import lines migrated via codemod
- User-visible brand strings renamed (emails, page titles, PWA
  manifest, mobile header, MFA backup-codes header, tooltips, signin
  page, invite page, weekly digest, install prompt)
- TOTP issuer "CapaKraken" → "Nexus" (existing secrets still valid;
  re-enrollment relabels them in users' authenticator apps)
- Function rename: assertCapaKrakenDbTarget → assertNexusDbTarget
- LocalStorage migration shim in apps/web/src/app/layout.tsx copies
  capakraken_* → nexus_* on first load (guarded by nexus_migrated_v1
  sentinel; runs once per browser, then never again)
- Service-worker cache name capakraken-v2 → nexus-v2 with one-time
  caches.delete('capakraken-v2') from the same shim
- Email-domain fixtures @capakraken.{dev,app} → @nexus.{dev,app} in
  seed data, e2e specs, SMTP default fallback
- Dockerfile.dev / Dockerfile.prod / all .github/workflows/*.yml
  pnpm --filter @capakraken/* → @nexus/*
- README, CLAUDE.md, LEARNINGS.md, all docs/*.md, .env.example,
  tooling/deploy/.env.production.example brand sweep

Phase 1 deliberately leaves untouched (handled in Phase 3 cutover):
- PostgreSQL DB name "capakraken" and POSTGRES_USER "capakraken"
- Volume names capakraken_pgdata etc.
- Compose project name "capakraken" / "capakraken-prod"
- db-target-guard default expectedDatabase
- env-var CAPAKRAKEN_EXPECTED_DB_NAME
- Container DNS names in docker-compose.ci.yml

Quality gates green: pnpm typecheck (7/7), pnpm test:unit (7/7),
pnpm lint (0 errors), check:exports/imports/architecture all pass.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

packages/engine/src/estimate/export-serializer.ts

@@ -4,7 +4,7 @@ import {
   type EstimateExportSummary,
   type EstimateStatus,
   type EstimateVersionStatus,
-} from "@capakraken/shared";
+} from "@nexus/shared";
 import { summarizeEstimateDemandLines } from "./metrics.js";
 
 type ExcelJsModule = typeof import("exceljs");
@@ -200,10 +200,7 @@ function escapeDelimitedValue(value: unknown, delimiter: string) {
   return rendered;
 }
 
-function serializeDelimited(
-  rows: Array<Record<string, unknown>>,
-  delimiter: string,
-) {
+function serializeDelimited(rows: Array<Record<string, unknown>>, delimiter: string) {
   if (rows.length === 0) {
     return "";
   }
@@ -226,18 +223,12 @@ function serializeDelimited(
 
 function buildSummary(source: EstimateExportSource): EstimateExportSummary {
   const summarized = summarizeEstimateDemandLines(source.version.demandLines);
-  const metricsByKey = new Map(
-    source.version.metrics.map((metric) => [metric.key, metric]),
-  );
+  const metricsByKey = new Map(source.version.metrics.map((metric) => [metric.key, metric]));
 
-  const totalHours =
-    metricsByKey.get("total_hours")?.valueDecimal ?? summarized.totalHours;
-  const totalCostCents =
-    metricsByKey.get("total_cost")?.valueCents ?? summarized.totalCostCents;
-  const totalPriceCents =
-    metricsByKey.get("total_price")?.valueCents ?? summarized.totalPriceCents;
-  const marginCents =
-    metricsByKey.get("margin")?.valueCents ?? summarized.marginCents;
+  const totalHours = metricsByKey.get("total_hours")?.valueDecimal ?? summarized.totalHours;
+  const totalCostCents = metricsByKey.get("total_cost")?.valueCents ?? summarized.totalCostCents;
+  const totalPriceCents = metricsByKey.get("total_price")?.valueCents ?? summarized.totalPriceCents;
+  const marginCents = metricsByKey.get("margin")?.valueCents ?? summarized.marginCents;
   const marginPercent =
     metricsByKey.get("margin_percent")?.valueDecimal ?? summarized.marginPercent;
 
@@ -262,10 +253,7 @@ function buildSummary(source: EstimateExportSource): EstimateExportSummary {
   };
 }
 
-function buildOverviewRows(
-  source: EstimateExportSource,
-  summary: EstimateExportSummary,
-) {
+function buildOverviewRows(source: EstimateExportSource, summary: EstimateExportSummary) {
   return [
     { field: "estimate_id", value: summary.estimateId },
     { field: "estimate_name", value: summary.estimateName },
@@ -281,7 +269,10 @@ function buildOverviewRows(
     { field: "base_currency", value: summary.baseCurrency },
     { field: "opportunity_id", value: source.estimate.opportunityId ?? "" },
     { field: "locked_at", value: serializeDate(source.version.lockedAt) ?? "" },
-    { field: "generated_from_project_start", value: serializeDate(source.project?.startDate) ?? "" },
+    {
+      field: "generated_from_project_start",
+      value: serializeDate(source.project?.startDate) ?? "",
+    },
     { field: "generated_from_project_end", value: serializeDate(source.project?.endDate) ?? "" },
     { field: "assumption_count", value: summary.assumptionCount },
     { field: "scope_item_count", value: summary.scopeItemCount },
@@ -339,8 +330,7 @@ function buildDemandRows(source: EstimateExportSource) {
     line_no: index + 1,
     line_id: line.id,
     scope_item_id: line.scopeItemId ?? "",
-    scope_item_name:
-      (line.scopeItemId ? scopeItemsById.get(line.scopeItemId)?.name : null) ?? "",
+    scope_item_name: (line.scopeItemId ? scopeItemsById.get(line.scopeItemId)?.name : null) ?? "",
     role_id: line.roleId ?? "",
     resource_id: line.resourceId ?? "",
     line_type: line.lineType,
@@ -394,10 +384,7 @@ function buildMetricRows(metrics: ExportMetric[]) {
   }));
 }
 
-function buildSapRows(
-  source: EstimateExportSource,
-  summary: EstimateExportSummary,
-) {
+function buildSapRows(source: EstimateExportSource, summary: EstimateExportSummary) {
   return source.version.demandLines.map((line, index) => ({
     record_type: "ESTIMATE_LINE",
     estimate_id: summary.estimateId,
@@ -420,10 +407,7 @@ function buildSapRows(
   }));
 }
 
-function buildMmpRows(
-  source: EstimateExportSource,
-  summary: EstimateExportSummary,
-) {
+function buildMmpRows(source: EstimateExportSource, summary: EstimateExportSummary) {
   const monthKeys = Array.from(
     new Set(
       source.version.demandLines.flatMap((line) =>
@@ -449,18 +433,14 @@ function buildMmpRows(
     };
 
     for (const monthKey of monthKeys) {
-      baseRow[`month_${monthKey}`] =
-        toNumericRecord(line.monthlySpread)[monthKey] ?? 0;
+      baseRow[`month_${monthKey}`] = toNumericRecord(line.monthlySpread)[monthKey] ?? 0;
     }
 
     return baseRow;
   });
 }
 
-function buildJsonDocument(
-  source: EstimateExportSource,
-  summary: EstimateExportSummary,
-) {
+function buildJsonDocument(source: EstimateExportSource, summary: EstimateExportSummary) {
   return {
     schemaVersion: 1,
     generatedAt: new Date().toISOString(),
@@ -626,8 +606,7 @@ async function buildXlsxPayload(
   return {
     schemaVersion: 1,
     format: EstimateExportFormat.XLSX,
-    mimeType:
-      "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
+    mimeType: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
     encoding: "base64",
     fileExtension: "xlsx",
     generatedAt: new Date().toISOString(),