fix: event log UI issues and add global error toast handler

- Fix event log white background to use dark theme (bg-[#141413])
- Fix UserRole.admin typo to UserRole.ADMIN in event_detail.py
- Add global exception handler that logs errors and shows toast

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/animaltrack/web/app.py

@@ -3,6 +3,7 @@
 
 from __future__ import annotations
 
+import logging
 from pathlib import Path
 
 from fasthtml.common import Beforeware, Meta, fast_app, setup_toasts
@@ -19,6 +20,7 @@ from animaltrack.web.middleware import (
     csrf_before,
     request_id_before,
 )
+from animaltrack.web.responses import error_toast
 from animaltrack.web.routes import (
     actions_router,
     animals_router,
@@ -157,6 +159,13 @@ def create_app(
     app.add_exception_handler(AuthenticationError, authentication_error_handler)
     app.add_exception_handler(AuthorizationError, authorization_error_handler)
 
+    # Global handler for unhandled exceptions - log and show toast
+    async def unhandled_error_handler(request, exc):
+        logging.exception("Unhandled exception in %s %s", request.method, request.url.path)
+        return error_toast("An unexpected error occurred. Please try again.", status_code=500)
+
+    app.add_exception_handler(Exception, unhandled_error_handler)
+
     # Register routes using APIRouter pattern
     health_router.to_app(app)
     actions_router.to_app(app)

src/animaltrack/web/templates/event_detail.py

@@ -70,7 +70,7 @@ def event_detail_panel(
         # Affected animals
         affected_animals_section(affected_animals),
         # Delete button (admin only, not for tombstoned events)
-        delete_section(event.id) if user_role == UserRole.admin and not is_tombstoned else None,
+        delete_section(event.id) if user_role == UserRole.ADMIN and not is_tombstoned else None,
         id="event-panel-content",
         cls="bg-[#141413] h-full overflow-y-auto",
     )

src/animaltrack/web/templates/events.py

@@ -231,6 +231,6 @@ def event_log_panel(
             event_log_list(events),
             id="event-log-content",
         ),
-        cls="bg-white rounded-lg shadow p-4",
+        cls="bg-[#141413] rounded-lg shadow p-4",
         id="event-log",
     )