feat: add ELO refresh job to GitLab CI and polish mobile display

- Add refresh-elo job to .gitlab-ci.yml triggered by schedules; runs
  the Python scraper and commits updated elo-data.json back to main
- Hide Stat-Check ELO column header on mobile (sm:hidden), fold ELO
  score as a subtitle under ITC Points on mobile instead

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitlab-ci.yml

@@ -1,6 +1,7 @@
 stages:
   - build
   - deploy
+  - refresh
 
 build:
   stage: build
@@ -23,3 +24,22 @@ deploy:
   environment:
     name: production
     url: https://40k-rankings.gateway-gamers.net
+
+refresh-elo:
+  stage: refresh
+  image: python:3.12-slim
+  variables:
+    GIT_STRATEGY: clone
+  script:
+    - cd statcheck-elo-scraper && python refresh_elo.py && cd ..
+    - git config user.email "gitlab-ci@gateway-gamers.net"
+    - git config user.name "GitLab CI"
+    - git remote set-url origin "https://oauth2:${GITLAB_ACCESS_TOKEN}@${CI_SERVER_HOST}/${CI_PROJECT_PATH}.git"
+    - git add public/elo-data.json
+    - |
+      if ! git diff --cached --quiet; then
+        git commit -m "data: refresh stat-check ELO rankings [skip ci]"
+        git push origin HEAD:main
+      fi
+  only:
+    - schedules