Add neo-brutalist Keycloak login theme 'ecosplay'

- Custom theme under themes/ecosplay/login (extends keycloak parent)
  with template.ftl and login.ftl matching the e-cosplay.fr style:
  thick black borders, hard offset shadows, italic uppercase, indigo
  accent, hover translate effect, marquee header, watermark.
- Tailwind via Play CDN for utility classes (no build step).
- Mount the theme dir read-only into the Keycloak container.
- Init container now also sets loginTheme=ecosplay on master realm
  alongside the SMTP config; service renamed keycloak-init.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker-compose.yml

@@ -35,15 +35,17 @@ services:
       KEYCLOAK_ADMIN_PASSWORD: admin
     ports:
       - "9450:8080"
+    volumes:
+      - ./themes/ecosplay:/opt/keycloak/themes/ecosplay:ro
     depends_on:
       postgres:
         condition: service_healthy
     networks:
       - keycloak-net
 
-  keycloak-smtp-init:
+  keycloak-init:
     image: quay.io/keycloak/keycloak:26.0
-    container_name: ecosplay-auth-smtp-init
+    container_name: ecosplay-auth-init
     depends_on:
       keycloak:
         condition: service_started
@@ -57,6 +59,7 @@ services:
       SMTP_FROM_DISPLAY_NAME: E-Cosplay
       SMTP_USER: AKIAWTT2T22CWBRBBDYN
       SMTP_PASSWORD: BBdgb6KxRQ8mNcpWFJsZCJxbSGNdgLhKFiITMErfBlQP
+      LOGIN_THEME: ecosplay
     entrypoint: ["/bin/bash", "-c"]
     command:
       - |
@@ -69,7 +72,7 @@ services:
           echo "Waiting for Keycloak to be ready..."
           sleep 5
         done
-        echo "Keycloak ready, configuring SMTP on master realm..."
+        echo "Keycloak ready, configuring master realm (SMTP + theme)..."
         /opt/keycloak/bin/kcadm.sh update realms/master \
           -s "smtpServer.host=$$SMTP_HOST" \
           -s "smtpServer.port=$$SMTP_PORT" \
@@ -79,8 +82,9 @@ services:
           -s "smtpServer.starttls=true" \
           -s "smtpServer.ssl=false" \
           -s "smtpServer.user=$$SMTP_USER" \
-          -s "smtpServer.password=$$SMTP_PASSWORD"
-        echo "SMTP configuration applied to master realm."
+          -s "smtpServer.password=$$SMTP_PASSWORD" \
+          -s "loginTheme=$$LOGIN_THEME"
+        echo "Master realm configured."
     networks:
       - keycloak-net
     restart: "no"