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/assistant-approvals.spec.ts

@@ -3,7 +3,7 @@ import { execFileSync } from "node:child_process";
 import { existsSync, readFileSync } from "node:fs";
 import { resolve } from "node:path";
 
-const ADMIN_EMAIL = "admin@capakraken.dev";
+const ADMIN_EMAIL = "admin@nexus.dev";
 const ADMIN_PASSWORD = "admin123";
 const CURRENT_CONVERSATION_ID = "assistant-e2e-current";
 const DB_WORKDIR = resolve(process.cwd(), "../../packages/db");
@@ -159,7 +159,9 @@ test.describe("Assistant approvals", () => {
     `);
   });
 
-  test("renders the pending approval inbox and handles cross-conversation actions", async ({ page }) => {
+  test("renders the pending approval inbox and handles cross-conversation actions", async ({
+    page,
+  }) => {
     const suffix = Date.now();
     const currentClientName = `E2E Approval Client Current ${suffix}`;
     const otherClientName = `E2E Approval Client Other ${suffix}`;
@@ -210,14 +212,22 @@ test.describe("Assistant approvals", () => {
     await expect(page.getByText(currentApproval.summary)).toBeVisible();
     await expect(page.getByText(otherApproval.summary)).toBeVisible();
 
-    const currentCard = page.locator('[data-testid="assistant-approval-card"][data-conversation-scope="current"]').first();
-    const otherCard = page.locator('[data-testid="assistant-approval-card"][data-conversation-scope="other"]').first();
+    const currentCard = page
+      .locator('[data-testid="assistant-approval-card"][data-conversation-scope="current"]')
+      .first();
+    const otherCard = page
+      .locator('[data-testid="assistant-approval-card"][data-conversation-scope="other"]')
+      .first();
     await expect(currentCard).toContainText("This chat");
     await expect(otherCard).toContainText("Other chat");
 
     await otherCard.getByTestId("assistant-approval-cancel").click();
     await expect(page.getByText(`Aktion verworfen: ${otherApproval.summary}`)).toBeVisible();
-    await expect(page.locator(`[data-testid="assistant-approval-card"][data-approval-id="${otherApproval.id}"]`)).toHaveCount(0);
+    await expect(
+      page.locator(
+        `[data-testid="assistant-approval-card"][data-approval-id="${otherApproval.id}"]`,
+      ),
+    ).toHaveCount(0);
 
     await expect
       .poll(async () => {