Initial commit: KeepItGoing task management server

Features:
- Django-based REST API with web interface
- Task management with tags, priorities, and due dates
- Time tracking with start/stop timers
- Subtasks support
- Task filtering (all, today, upcoming, overdue, completed)
- Tag-based organization with color coding
- Sorting by due date and priority
- Auto-assign tags when filtering
- Responsive 3-pane layout (sidebar, task list, detail panel)
- Task sharing between users
- Mobile-responsive design with dark mode support

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

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

users/admin.py

@@ -0,0 +1,39 @@
+"""
+User admin configuration.
+"""
+
+from django.contrib import admin
+from django.contrib.auth.admin import UserAdmin as BaseUserAdmin
+from .models import User, DeviceToken
+
+
+@admin.register(User)
+class UserAdmin(BaseUserAdmin):
+    """Admin configuration for User model."""
+
+    list_display = ['email', 'username', 'first_name', 'last_name', 'is_staff', 'created_at']
+    list_filter = ['is_staff', 'is_superuser', 'is_active', 'created_at']
+    search_fields = ['email', 'username', 'first_name', 'last_name']
+    ordering = ['-created_at']
+
+    fieldsets = BaseUserAdmin.fieldsets + (
+        ('Profile', {'fields': ('timezone', 'avatar')}),
+        ('Preferences', {'fields': ('default_reminder_minutes', 'email_notifications', 'push_notifications')}),
+    )
+
+    add_fieldsets = (
+        (None, {
+            'classes': ('wide',),
+            'fields': ('email', 'username', 'password1', 'password2'),
+        }),
+    )
+
+
+@admin.register(DeviceToken)
+class DeviceTokenAdmin(admin.ModelAdmin):
+    """Admin configuration for DeviceToken model."""
+
+    list_display = ['user', 'platform', 'device_name', 'is_active', 'created_at']
+    list_filter = ['platform', 'is_active']
+    search_fields = ['user__email', 'device_name']
+    ordering = ['-created_at']