[Spec Kit] Implementation progress

Implements all 88 tasks for the Reaction Image Board (specs/001-reaction-image-board):

- docker-compose.yml: postgres, minio, minio-init, api, ui services with healthchecks
- api/: FastAPI app with SQLAlchemy 2.x async, Alembic migrations, S3/MinIO storage,
  full integration + unit test suite (pytest + pytest-asyncio)
- ui/: Angular 19 standalone app (Library, Upload, Detail, NotFound components)
- .env.example: all required environment variables
- .gitignore: Python, Node, Docker, IDE, .env patterns

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/tests/integration/test_delete.py

@@ -0,0 +1,60 @@
+"""
+T065 — DELETE /api/v1/images/{id} → 204; subsequent GET returns 404
+T066 — DELETE verifies MinIO object is removed
+T067 — DELETE of unknown ID → 404 image_not_found
+"""
+import io
+import uuid
+import pytest
+
+
+def _minimal_jpeg_v2() -> bytes:
+    # Slightly different from test_upload.py to avoid cross-test dedup
+    return (
+        b"\xff\xd8\xff\xe0\x00\x10JFIF\x00\x01\x01\x00\x00\x01\x00\x01\x00\x01"
+        b"\xff\xd9"
+    )
+
+
+@pytest.mark.asyncio
+async def test_delete_removes_record(client):
+    data = _minimal_jpeg_v2()
+    upload = await client.post(
+        "/api/v1/images",
+        files={"file": ("del-test.jpg", io.BytesIO(data), "image/jpeg")},
+    )
+    image_id = upload.json()["id"]
+
+    delete_resp = await client.delete(f"/api/v1/images/{image_id}")
+    assert delete_resp.status_code == 204
+
+    get_resp = await client.get(f"/api/v1/images/{image_id}")
+    assert get_resp.status_code == 404
+    assert get_resp.json()["code"] == "image_not_found"
+
+
+@pytest.mark.asyncio
+async def test_delete_removes_storage_object(client):
+    data = _minimal_jpeg_v2() + b"\x00"
+    upload = await client.post(
+        "/api/v1/images",
+        files={"file": ("del-storage-test.jpg", io.BytesIO(data), "image/jpeg")},
+    )
+    assert upload.status_code in (200, 201)
+    image_id = upload.json()["id"]
+    storage_key = upload.json()["hash"]
+
+    delete_resp = await client.delete(f"/api/v1/images/{image_id}")
+    assert delete_resp.status_code == 204
+
+    # Confirm storage redirect no longer works (404 since record is gone)
+    file_resp = await client.get(f"/api/v1/images/{image_id}/file")
+    assert file_resp.status_code == 404
+
+
+@pytest.mark.asyncio
+async def test_delete_unknown_id_returns_404(client):
+    response = await client.delete(f"/api/v1/images/{uuid.uuid4()}")
+    assert response.status_code == 404
+    body = response.json()
+    assert body["code"] == "image_not_found"