M0: scaffold SPA + API monorepo

Backend (Django 6.1 + DRF):
- Token auth with a custom User model (register/login/logout/me)
- Library models (MediaItem, MediaLocation) and REST endpoints
- File list/detail with search, rating filter, sorting, pagination
- Multipart upload with optional rating/tags/notes
- Range-aware media serving (video seeking) and ffmpeg thumbnails
- scan_files management command for the watched folder

Frontend (React 19 + Vite + TypeScript):
- Catppuccin Mocha design tokens from the design docs
- App shell, token persistence, protected routes
- Library grid with filters, file detail with custom data editor
- Upload page with per-file progress via XHR
- Dev proxy to the Django API

backend/apps/library/migrations/0001_initial.py

@@ -0,0 +1,45 @@
+# Generated by Django 6.1.1 on 2026-09-17 12:49
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='MediaItem',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('md5', models.CharField(max_length=32, unique=True)),
+                ('size', models.BigIntegerField(default=0)),
+                ('rating', models.CharField(blank=True, default='', max_length=1)),
+                ('tags', models.JSONField(blank=True, default=list)),
+                ('notes', models.TextField(blank=True, default='')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+            ],
+            options={
+                'ordering': ['-created_at'],
+            },
+        ),
+        migrations.CreateModel(
+            name='MediaLocation',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('path', models.CharField(max_length=1024)),
+                ('rel_path', models.CharField(max_length=1024)),
+                ('mtime', models.FloatField(default=0)),
+                ('item', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='locations', to='library.mediaitem')),
+            ],
+            options={
+                'ordering': ['rel_path'],
+                'unique_together': {('item', 'path')},
+            },
+        ),
+    ]