[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/alembic/env.py

@@ -0,0 +1,60 @@
+import asyncio
+from logging.config import fileConfig
+
+from sqlalchemy import pool
+from sqlalchemy.engine import Connection
+from sqlalchemy.ext.asyncio import async_engine_from_config
+
+from alembic import context
+
+from app.config import get_settings
+from app.database import Base
+import app.models  # noqa: F401 — ensure all models are imported
+
+config = context.config
+settings = get_settings()
+config.set_main_option("sqlalchemy.url", settings.database_url)
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+
+def run_migrations_offline() -> None:
+    url = config.get_main_option("sqlalchemy.url")
+    context.configure(
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def do_run_migrations(connection: Connection) -> None:
+    context.configure(connection=connection, target_metadata=target_metadata)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_async_migrations() -> None:
+    connectable = async_engine_from_config(
+        config.get_section(config.config_ini_section, {}),
+        prefix="sqlalchemy.",
+        poolclass=pool.NullPool,
+    )
+    async with connectable.connect() as connection:
+        await connection.run_sync(do_run_migrations)
+    await connectable.dispose()
+
+
+def run_migrations_online() -> None:
+    asyncio.run(run_async_migrations())
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()

api/alembic/script.py.mako

@@ -0,0 +1,25 @@
+"""${message}
+
+Revision ID: ${up_revision}
+Revises: ${down_revision | comma,n}
+Create Date: ${create_date}
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+${imports if imports else ""}
+
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, None] = ${repr(down_revision)}
+branch_labels: Union[str, Sequence[str], None] = ${repr(branch_labels)}
+depends_on: Union[str, Sequence[str], None] = ${repr(depends_on)}
+
+
+def upgrade() -> None:
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    ${downgrades if downgrades else "pass"}

api/alembic/versions/001_initial_schema.py

@@ -0,0 +1,63 @@
+"""initial schema — images, tags, image_tags
+
+Revision ID: 001
+Revises:
+Create Date: 2026-05-02
+
+"""
+from typing import Sequence, Union
+import sqlalchemy as sa
+from sqlalchemy.dialects import postgresql
+from alembic import op
+
+revision: str = "001"
+down_revision: Union[str, None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "images",
+        sa.Column("id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("hash", sa.String(64), nullable=False),
+        sa.Column("filename", sa.String(), nullable=False),
+        sa.Column("mime_type", sa.String(20), nullable=False),
+        sa.Column("size_bytes", sa.BigInteger(), nullable=False),
+        sa.Column("width", sa.Integer(), nullable=False),
+        sa.Column("height", sa.Integer(), nullable=False),
+        sa.Column("storage_key", sa.String(64), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("hash", name="uq_images_hash"),
+    )
+    op.create_index("ix_images_hash", "images", ["hash"])
+
+    op.create_table(
+        "tags",
+        sa.Column("id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("name", sa.String(64), nullable=False),
+        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
+        sa.PrimaryKeyConstraint("id"),
+        sa.UniqueConstraint("name", name="uq_tags_name"),
+    )
+    op.create_index("ix_tags_name", "tags", ["name"])
+    op.create_index("ix_tags_name_prefix", "tags", ["name"], postgresql_ops={"name": "varchar_pattern_ops"})
+
+    op.create_table(
+        "image_tags",
+        sa.Column("image_id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.Column("tag_id", postgresql.UUID(as_uuid=True), nullable=False),
+        sa.ForeignKeyConstraint(["image_id"], ["images.id"], ondelete="CASCADE"),
+        sa.ForeignKeyConstraint(["tag_id"], ["tags.id"], ondelete="RESTRICT"),
+        sa.PrimaryKeyConstraint("image_id", "tag_id"),
+        sa.UniqueConstraint("image_id", "tag_id", name="uq_image_tag"),
+    )
+    op.create_index("ix_image_tags_image_id", "image_tags", ["image_id"])
+    op.create_index("ix_image_tags_tag_id", "image_tags", ["tag_id"])
+
+
+def downgrade() -> None:
+    op.drop_table("image_tags")
+    op.drop_table("tags")
+    op.drop_table("images")