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>

src/functional_tests/management/commands/setup_sea_session.py

@@ -104,7 +104,7 @@ class Command(BaseCommand):
         # ── URL ──────────────────────────────────────────────────────────────
         room_path = f"/gameboard/room/{room.pk}/"
         session_key = _make_session(user)
-        url = f"{base_url}/lyric/dev-login/{session_key}/?next={room_path}"
+        url = f"{base_url}/dashboard/dev-login/{session_key}/?next={room_path}"
 
         self.stdout.write(f"\nRoom:  {base_url}{room_path}")
         self.stdout.write(f"Gamer: {GAMER_EMAIL}  (PC / levity / earthman)")

src/functional_tests/management/commands/setup_sig_session.py

@@ -120,7 +120,7 @@ class Command(BaseCommand):
 
         for (email, container), user, role in zip(GAMERS, users, ROLES):
             session_key = _make_session(user)
-            url = f"{base_url}/lyric/dev-login/{session_key}/?next={room_path}"
+            url = f"{base_url}/dashboard/dev-login/{session_key}/?next={room_path}"
             self.stdout.write(f"{container:<12}  {email:<22}  {role:<6}  {url}")
 
         self.stdout.write("")