rename(phase 1): CapaKraken → Nexus across code, UI, docs, CI (#61)

rename(phase 1): CapaKraken → Nexus across code, UI, docs, CI (#61)

Co-authored-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com>
Co-committed-by: Hartmut Nörenberg <hn@hartmut-noerenberg.com>

.env.example

@@ -1,5 +1,5 @@
 # ─────────────────────────────────────────────────────────────────────────────
-# CapaKraken — environment variable reference
+# Nexus — environment variable reference
 #
 # Copy this file to .env and fill in the values before running the app.
 # Lines starting with # are comments. Lines with no value are optional.
@@ -12,7 +12,7 @@
 # REQUIRED — Public URL of the app (with scheme, no trailing slash).
 # Used in email links (invites, password reset) and as the Auth.js base URL.
 # Must use https:// in production.
-NEXTAUTH_URL=https://capakraken.example.com
+NEXTAUTH_URL=https://nexus.example.com
 
 # REQUIRED — Secret used to sign and encrypt JWTs and session cookies.
 # Generate one with: openssl rand -base64 32
@@ -65,7 +65,7 @@ REDIS_PASSWORD=
 # SMTP_PORT=587
 # SMTP_USER=no-reply@example.com
 # SMTP_PASSWORD=
-# SMTP_FROM=CapaKraken <no-reply@example.com>
+# SMTP_FROM=Nexus <no-reply@example.com>
 # SMTP_TLS=true     # "true" = SMTPS (port 465); "false" = STARTTLS or plain
 
 # ─── pgAdmin (dev / Docker Compose only) ─────────────────────────────────────
@@ -74,8 +74,8 @@ REDIS_PASSWORD=
 # Used as the password for the pgAdmin web UI (http://localhost:5050).
 PGADMIN_PASSWORD=
 
-# Email shown on the pgAdmin login screen (default: admin@capakraken.dev).
-# PGADMIN_EMAIL=admin@capakraken.dev
+# Email shown on the pgAdmin login screen (default: admin@nexus.dev).
+# PGADMIN_EMAIL=admin@nexus.dev
 
 # ─── Logging ─────────────────────────────────────────────────────────────────