Add accounts, presets, live sheet panel and equipment tiles

- Login with registration code, sessions, rate limiting, per-user characters
- Share characters with other users (read-only), admin CLI
- Rules presets with a Presets tab, applied/pending changes with diff in a side sheet
- Equipment as tiles with amounts, starting kit removed
- Rename nav tab to "Character", add "New character" button
- Stop tracking _to_delete/

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01HJhXuLD2Z6hv3Wqeq9UL9K

docker-compose.yml

@@ -3,7 +3,13 @@ services:
     build: .
     restart: unless-stopped
     ports:
-      - "8080:8000"          # Host-Port bei Bedarf ändern, oder hinter einen Reverse Proxy hängen
+      - "8080:8000"          # change the host port, or put the container behind a reverse proxy
+    environment:
+      # Code that new users must enter to create an account (set it in the .env file next to this file).
+      # Empty = registration is disabled.
+      AW_REGISTRATION_CODE: ${AW_REGISTRATION_CODE:-}
+      # Set to 1 when a reverse proxy (nginx, Caddy, Traefik) in front sets X-Forwarded-* headers.
+      AW_TRUST_PROXY: ${AW_TRUST_PROXY:-0}
     volumes:
-      - ./db:/db             # SQLite-Datenbank (Charaktere)
-      - ./backend/data:/app/data:ro   # rules.json: bearbeiten, Seite neu laden, fertig
+      - ./db:/db             # SQLite database (users, characters, presets)
+      - ./backend/data:/app/data:ro   # rules.json: edit, reload the page, done