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>

apps/web/e2e/bench.spec.ts

@@ -2,7 +2,7 @@ import { expect, test, type Page } from "@playwright/test";
 
 async function signIn(page: Page) {
   await page.goto("/auth/signin");
-  await page.fill('input[type="email"]', "admin@capakraken.dev");
+  await page.fill('input[type="email"]', "admin@nexus.dev");
   await page.fill('input[type="password"]', "admin123");
   await page.click('button[type="submit"]');
   await expect(page).toHaveURL(/\/(dashboard|resources)/);
@@ -16,9 +16,7 @@ test.describe("Bench Board", () => {
 
   test("bench board page loads with heading", async ({ page }) => {
     await page.waitForLoadState("networkidle");
-    await expect(
-      page.locator("h1", { hasText: "Bench Board" }),
-    ).toBeVisible({ timeout: 10000 });
+    await expect(page.locator("h1", { hasText: "Bench Board" })).toBeVisible({ timeout: 10000 });
   });
 
   test("date range filter inputs are visible", async ({ page }) => {
@@ -32,7 +30,8 @@ test.describe("Bench Board", () => {
   test("shows bench results or no-resources empty state", async ({ page }) => {
     await page.waitForLoadState("networkidle");
     await expect(
-      page.locator("table")
+      page
+        .locator("table")
         .or(page.locator("text=No resources on bench"))
         .or(page.locator("text=No results"))
         .first(),