Initial public commit

Daybook: a self-hosted, multi-user Django + DRF app where agents, scripts,
or people publish artifacts and each logged-in user browses their own
time-ordered, label-filterable feed.

This squashes prior local development history (kept privately on a separate
branch) into a single clean starting point for the public repository.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

artifacts/admin.py

@@ -0,0 +1,23 @@
+from django.contrib import admin
+
+from .models import Artifact, Asset, UserProfile
+
+
+@admin.register(Artifact)
+class ArtifactAdmin(admin.ModelAdmin):
+    list_display = ("id", "title", "owner", "source", "kind", "is_kept", "size_bytes", "day", "created_at")
+    list_filter = ("owner", "source", "source_type", "kind", "is_kept", "day")
+    search_fields = ("id", "title", "source", "source_name", "source_id")
+
+
+@admin.register(UserProfile)
+class UserProfileAdmin(admin.ModelAdmin):
+    list_display = ("user", "quota_bytes")
+    search_fields = ("user__username",)
+
+
+@admin.register(Asset)
+class AssetAdmin(admin.ModelAdmin):
+    list_display = ("id", "owner", "artifact", "content_type", "size_bytes", "created_at")
+    list_filter = ("owner", "content_type")
+    search_fields = ("id",)