auth urls: mount apps.lyric.urls under /dashboard/ to mirror gameboard/epic & billboard/drama convention

- core/urls.py: replace `path('lyric/', …)` with second `path('dashboard/', include('apps.lyric.urls'))` alongside existing dashboard mount; no path-name collision (lyric paths: send_login_email, login, logout, dev-login/<key>/)
- IT test URL strings flipped /lyric/ → /dashboard/ (test_views.py)
- setup_sig_session + setup_sea_session pre-auth URL builders updated
- CLAUDE.md doc note updated
- Templates use unnamespaced `{% url 'logout' %}` / `{% url 'send_login_email' %}` so they auto-resolve; no template edits needed
- /admin/lyric/user/ admin URL untouched (driven by app_label, not URL conf)

Code architected by Disco DeDisco <discodedisco@outlook.com>
Git commit message Co-Authored-By:
Claude Sonnet 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -73,7 +73,7 @@ python src/manage.py setup_sig_session --base-url http://localhost:8000
 python src/manage.py setup_sig_session --room <uuid>
 ```
 
-Fixed gamers: `founder@test.io` (discoman), `amigo@test.io`, `bud@test.io`, `pal@test.io`, `dude@test.io`, `bro@test.io` — all superusers with Earthman deck. URLs use `/lyric/dev-login/<session_key>/` pre-auth pattern.
+Fixed gamers: `founder@test.io` (discoman), `amigo@test.io`, `bud@test.io`, `pal@test.io`, `dude@test.io`, `bro@test.io` — all superusers with Earthman deck. URLs use `/dashboard/dev-login/<session_key>/` pre-auth pattern.
 
 ## CI/CD + Hosting
 - Git remote: `git@gitea:discoman/python-tdd.git` (port 222, key `~/.ssh/gitea_keys/id_ed25519_python-tdd`)