feat(docs): codebase refactor - added src directory

2026-03-22 06:57:47 +01:00 · 2025-11-13 13:45:41 +01:00
parent 6effb2793a
commit f0b1452e30
157 changed files with 16 additions and 6081 deletions
--- a/7project/src/backend/Dockerfile
+++ b/7project/src/backend/Dockerfile
@@ -0,0 +1,8 @@
+FROM python:3.11-trixie
+
+WORKDIR /app
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+COPY . .
+EXPOSE 8000
+CMD alembic upgrade head && uvicorn app.app:fastApi --host 0.0.0.0 --port 8000
--- a/7project/src/backend/alembic.ini
+++ b/7project/src/backend/alembic.ini
@@ -0,0 +1,148 @@
+# A generic, single database configuration.
+
+[alembic]
+# path to migration scripts.
+# this is typically a path given in POSIX (e.g. forward slashes)
+# format, relative to the token %(here)s which refers to the location of this
+# ini file
+script_location = %(here)s/alembic
+
+# template used to generate migration file names; The default value is %%(rev)s_%%(slug)s
+# Uncomment the line below if you want the files to be prepended with date and time
+# see https://alembic.sqlalchemy.org/en/latest/tutorial.html#editing-the-ini-file
+# for all available tokens
+file_template = %%(year)d_%%(month).2d_%%(day).2d_%%(hour).2d%%(minute).2d-%%(rev)s_%%(slug)s
+
+# sys.path path, will be prepended to sys.path if present.
+# defaults to the current working directory.  for multiple paths, the path separator
+# is defined by "path_separator" below.
+prepend_sys_path = .
+
+
+# timezone to use when rendering the date within the migration file
+# as well as the filename.
+# If specified, requires the python>=3.9 or backports.zoneinfo library and tzdata library.
+# Any required deps can installed by adding `alembic[tz]` to the pip requirements
+# string value is passed to ZoneInfo()
+# leave blank for localtime
+# timezone =
+
+# max length of characters to apply to the "slug" field
+# truncate_slug_length = 40
+
+# set to 'true' to run the environment during
+# the 'revision' command, regardless of autogenerate
+# revision_environment = false
+
+# set to 'true' to allow .pyc and .pyo files without
+# a source .py file to be detected as revisions in the
+# versions/ directory
+# sourceless = false
+
+# version location specification; This defaults
+# to <script_location>/versions.  When using multiple version
+# directories, initial revisions must be specified with --version-path.
+# The path separator used here should be the separator specified by "path_separator"
+# below.
+# version_locations = %(here)s/bar:%(here)s/bat:%(here)s/alembic/versions
+
+# path_separator; This indicates what character is used to split lists of file
+# paths, including version_locations and prepend_sys_path within configparser
+# files such as alembic.ini.
+# The default rendered in new alembic.ini files is "os", which uses os.pathsep
+# to provide os-dependent path splitting.
+#
+# Note that in order to support legacy alembic.ini files, this default does NOT
+# take place if path_separator is not present in alembic.ini.  If this
+# option is omitted entirely, fallback logic is as follows:
+#
+# 1. Parsing of the version_locations option falls back to using the legacy
+#    "version_path_separator" key, which if absent then falls back to the legacy
+#    behavior of splitting on spaces and/or commas.
+# 2. Parsing of the prepend_sys_path option falls back to the legacy
+#    behavior of splitting on spaces, commas, or colons.
+#
+# Valid values for path_separator are:
+#
+# path_separator = :
+# path_separator = ;
+# path_separator = space
+# path_separator = newline
+#
+# Use os.pathsep. Default configuration used for new projects.
+path_separator = os
+
+# set to 'true' to search source files recursively
+# in each "version_locations" directory
+# new in Alembic version 1.10
+# recursive_version_locations = false
+
+# the output encoding used when revision files
+# are written from script.py.mako
+# output_encoding = utf-8
+
+# database URL.  This is consumed by the user-maintained env.py script only.
+# other means of configuring database URLs may be customized within the env.py
+# file.
+# sqlalchemy.url = driver://user:pass@localhost/dbname
+# Pro async MariaDB bude url brána z proměnné prostředí DATABASE_URL
+
+
+[post_write_hooks]
+# post_write_hooks defines scripts or Python functions that are run
+# on newly generated revision scripts.  See the documentation for further
+# detail and examples
+
+# format using "black" - use the console_scripts runner, against the "black" entrypoint
+# hooks = black
+# black.type = console_scripts
+# black.entrypoint = black
+# black.options = -l 79 REVISION_SCRIPT_FILENAME
+
+# lint with attempts to fix using "ruff" - use the module runner, against the "ruff" module
+# hooks = ruff
+# ruff.type = module
+# ruff.module = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Alternatively, use the exec runner to execute a binary found on your PATH
+# hooks = ruff
+# ruff.type = exec
+# ruff.executable = ruff
+# ruff.options = check --fix REVISION_SCRIPT_FILENAME
+
+# Logging configuration.  This is also consumed by the user-maintained
+# env.py script only.
+[loggers]
+keys = root,sqlalchemy,alembic
+
+[handlers]
+keys = console
+
+[formatters]
+keys = generic
+
+[logger_root]
+level = WARNING
+handlers = console
+qualname =
+
+[logger_sqlalchemy]
+level = WARNING
+handlers =
+qualname = sqlalchemy.engine
+
+[logger_alembic]
+level = INFO
+handlers =
+qualname = alembic
+
+[handler_console]
+class = StreamHandler
+args = (sys.stderr,)
+level = NOTSET
+formatter = generic
+
+[formatter_generic]
+format = %(levelname)-5.5s [%(name)s] %(message)s
+datefmt = %H:%M:%S
--- a/7project/src/backend/alembic/env.py
+++ b/7project/src/backend/alembic/env.py
@@ -0,0 +1,57 @@
+import os
+import sys
+from logging.config import fileConfig
+from sqlalchemy import pool, create_engine
+from alembic import context
+
+# Add path for correct loading of modules
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+from app.core.db import Base
+
+config = context.config
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+DATABASE_URL = os.getenv("DATABASE_URL")
+if not DATABASE_URL:
+    mariadb_host = os.getenv("MARIADB_HOST", "localhost")
+    mariadb_port = os.getenv("MARIADB_PORT", "3306")
+    mariadb_db = os.getenv("MARIADB_DB", "group_project")
+    mariadb_user = os.getenv("MARIADB_USER", "root")
+    mariadb_password = os.getenv("MARIADB_PASSWORD", "strongpassword")
+    DATABASE_URL = f"mysql+pymysql://{mariadb_user}:{mariadb_password}@{mariadb_host}:{mariadb_port}/{mariadb_db}"
+
+SYNC_DATABASE_URL = DATABASE_URL.replace("+asyncmy", "+pymysql")
+
+host_env = os.getenv("MARIADB_HOST", "localhost")
+ssl_enabled = host_env not in {"localhost", "127.0.0.1"}
+connect_args = {"ssl": {"ssl": True}} if ssl_enabled else {}
+
+def run_migrations_offline() -> None:
+    context.configure(
+        url=SYNC_DATABASE_URL,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+def run_migrations_online() -> None:
+    connectable = create_engine(SYNC_DATABASE_URL, poolclass=pool.NullPool, connect_args=connect_args)
+    with connectable.connect() as connection:
+        context.configure(
+            connection=connection,
+            target_metadata=target_metadata,
+        )
+        with context.begin_transaction():
+            context.run_migrations()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    run_migrations_online()
--- a/7project/src/backend/alembic/script.py.mako
+++ b/7project/src/backend/alembic/script.py.mako
@@ -0,0 +1,28 @@
+"""${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 identifiers, used by Alembic.
+revision: str = ${repr(up_revision)}
+down_revision: Union[str, Sequence[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:
+    """Upgrade schema."""
+    ${upgrades if upgrades else "pass"}
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    ${downgrades if downgrades else "pass"}
--- a/7project/src/backend/alembic/versions/2025_10_09_1456-63e072f09836_add_categories.py
+++ b/7project/src/backend/alembic/versions/2025_10_09_1456-63e072f09836_add_categories.py
@@ -0,0 +1,71 @@
+"""add categories
+
+Revision ID: 63e072f09836
+Revises: 
+Create Date: 2025-10-09 14:56:14.653249
+
+"""
+from typing import Sequence, Union
+
+import fastapi_users_db_sqlalchemy
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '63e072f09836'
+down_revision: Union[str, Sequence[str], None] = None
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('user',
+    sa.Column('first_name', sa.String(length=100), nullable=True),
+    sa.Column('last_name', sa.String(length=100), nullable=True),
+    sa.Column('id', fastapi_users_db_sqlalchemy.generics.GUID(), nullable=False),
+    sa.Column('email', sa.String(length=320), nullable=False),
+    sa.Column('hashed_password', sa.String(length=1024), nullable=False),
+    sa.Column('is_active', sa.Boolean(), nullable=False),
+    sa.Column('is_superuser', sa.Boolean(), nullable=False),
+    sa.Column('is_verified', sa.Boolean(), nullable=False),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_user_email'), 'user', ['email'], unique=True)
+    op.create_table('categories',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('name', sa.String(length=100), nullable=False),
+    sa.Column('description', sa.String(length=255), nullable=True),
+    sa.Column('user_id', fastapi_users_db_sqlalchemy.generics.GUID(), nullable=False),
+    sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
+    sa.PrimaryKeyConstraint('id'),
+    sa.UniqueConstraint('name')
+    )
+    op.create_table('transaction',
+    sa.Column('id', sa.Integer(), autoincrement=True, nullable=False),
+    sa.Column('amount', sa.Float(), nullable=False),
+    sa.Column('description', sa.String(length=255), nullable=True),
+    sa.Column('user_id', fastapi_users_db_sqlalchemy.generics.GUID(), nullable=False),
+    sa.ForeignKeyConstraint(['user_id'], ['user.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('category_transaction',
+    sa.Column('id_category', sa.Integer(), nullable=True),
+    sa.Column('id_transaction', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['id_category'], ['categories.id'], ),
+    sa.ForeignKeyConstraint(['id_transaction'], ['transaction.id'], )
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('category_transaction')
+    op.drop_table('transaction')
+    op.drop_table('categories')
+    op.drop_index(op.f('ix_user_email'), table_name='user')
+    op.drop_table('user')
+    # ### end Alembic commands ###
--- a/7project/src/backend/alembic/versions/2025_10_09_1514-390041bd839e_update_categories_unique.py
+++ b/7project/src/backend/alembic/versions/2025_10_09_1514-390041bd839e_update_categories_unique.py
@@ -0,0 +1,34 @@
+"""update categories unique
+
+Revision ID: 390041bd839e
+Revises: 63e072f09836
+Create Date: 2025-10-09 15:14:31.557686
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '390041bd839e'
+down_revision: Union[str, Sequence[str], None] = '63e072f09836'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('name'), table_name='categories')
+    op.create_unique_constraint('uix_name_user_id', 'categories', ['name', 'user_id'])
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('uix_name_user_id', 'categories', type_='unique')
+    op.create_index(op.f('name'), 'categories', ['name'], unique=True)
+    # ### end Alembic commands ###
--- a/7project/src/backend/alembic/versions/2025_10_10_1405-7af8f296d089_add_user_oauth.py
+++ b/7project/src/backend/alembic/versions/2025_10_10_1405-7af8f296d089_add_user_oauth.py
@@ -0,0 +1,48 @@
+"""add user oauth
+
+Revision ID: 7af8f296d089
+Revises: 390041bd839e
+Create Date: 2025-10-10 14:05:00.153376
+
+"""
+from typing import Sequence, Union
+
+import fastapi_users_db_sqlalchemy
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '7af8f296d089'
+down_revision: Union[str, Sequence[str], None] = '390041bd839e'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('oauth_account',
+    sa.Column('id', fastapi_users_db_sqlalchemy.generics.GUID(), nullable=False),
+    sa.Column('user_id', fastapi_users_db_sqlalchemy.generics.GUID(), nullable=False),
+    sa.Column('oauth_name', sa.String(length=100), nullable=False),
+    sa.Column('access_token', sa.String(length=1024), nullable=False),
+    sa.Column('expires_at', sa.Integer(), nullable=True),
+    sa.Column('refresh_token', sa.String(length=1024), nullable=True),
+    sa.Column('account_id', sa.String(length=320), nullable=False),
+    sa.Column('account_email', sa.String(length=320), nullable=False),
+    sa.ForeignKeyConstraint(['user_id'], ['user.id'], ondelete='cascade'),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_index(op.f('ix_oauth_account_account_id'), 'oauth_account', ['account_id'], unique=False)
+    op.create_index(op.f('ix_oauth_account_oauth_name'), 'oauth_account', ['oauth_name'], unique=False)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_oauth_account_oauth_name'), table_name='oauth_account')
+    op.drop_index(op.f('ix_oauth_account_account_id'), table_name='oauth_account')
+    op.drop_table('oauth_account')
+    # ### end Alembic commands ###
--- a/7project/src/backend/alembic/versions/2025_10_11_2107-5ab2e654c96e_change_token_lenght.py
+++ b/7project/src/backend/alembic/versions/2025_10_11_2107-5ab2e654c96e_change_token_lenght.py
@@ -0,0 +1,38 @@
+"""change token length
+
+Revision ID: 5ab2e654c96e
+Revises: 7af8f296d089
+Create Date: 2025-10-11 21:07:41.930470
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = '5ab2e654c96e'
+down_revision: Union[str, Sequence[str], None] = '7af8f296d089'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('oauth_account', 'access_token',
+               existing_type=mysql.VARCHAR(length=1024),
+               type_=sa.String(length=4096),
+               existing_nullable=False)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('oauth_account', 'access_token',
+               existing_type=sa.String(length=4096),
+               type_=mysql.VARCHAR(length=1024),
+               existing_nullable=False)
+    # ### end Alembic commands ###
--- a/7project/src/backend/alembic/versions/2025_10_21_1856-eabec90a94fe_add_config_to_user.py
+++ b/7project/src/backend/alembic/versions/2025_10_21_1856-eabec90a94fe_add_config_to_user.py
@@ -0,0 +1,32 @@
+"""add config to user
+
+Revision ID: eabec90a94fe
+Revises: 5ab2e654c96e
+Create Date: 2025-10-21 18:56:42.085973
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'eabec90a94fe'
+down_revision: Union[str, Sequence[str], None] = '5ab2e654c96e'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('user', sa.Column('config', sa.JSON(), nullable=True))
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('user', 'config')
+    # ### end Alembic commands ###
--- a/7project/src/backend/alembic/versions/2025_10_22_1618-1f2a3c4d5e6f_add_date_to_transaction.py
+++ b/7project/src/backend/alembic/versions/2025_10_22_1618-1f2a3c4d5e6f_add_date_to_transaction.py
@@ -0,0 +1,32 @@
+"""add date to transaction
+
+Revision ID: 1f2a3c4d5e6f
+Revises: eabec90a94fe
+Create Date: 2025-10-22 16:18:00
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.sql import func
+
+# revision identifiers, used by Alembic.
+revision: str = '1f2a3c4d5e6f'
+down_revision: Union[str, Sequence[str], None] = 'eabec90a94fe'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema by adding date column with server default current_date."""
+    op.add_column(
+        'transaction',
+        sa.Column('date', sa.Date(), nullable=False, server_default=sa.text('CURRENT_DATE'))
+    )
+
+
+
+def downgrade() -> None:
+    """Downgrade schema by removing date column."""
+    op.drop_column('transaction', 'date')
--- a/7project/src/backend/alembic/versions/2025_10_29_1326-46b9e702e83f_add_encrypted_type.py
+++ b/7project/src/backend/alembic/versions/2025_10_29_1326-46b9e702e83f_add_encrypted_type.py
@@ -0,0 +1,47 @@
+"""Add encrypted type
+
+Revision ID: 46b9e702e83f
+Revises: 1f2a3c4d5e6f
+Create Date: 2025-10-29 13:26:24.568523
+
+"""
+from typing import Sequence, Union
+
+import sqlalchemy_utils
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = '46b9e702e83f'
+down_revision: Union[str, Sequence[str], None] = '1f2a3c4d5e6f'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('transaction', 'amount',
+               existing_type=mysql.FLOAT(),
+               type_=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               existing_nullable=False)
+    op.alter_column('transaction', 'description',
+               existing_type=mysql.VARCHAR(length=255),
+               type_=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               existing_nullable=True)
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('transaction', 'description',
+               existing_type=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               type_=mysql.VARCHAR(length=255),
+               existing_nullable=True)
+    op.alter_column('transaction', 'amount',
+               existing_type=sqlalchemy_utils.types.encrypted.encrypted_type.EncryptedType(),
+               type_=mysql.FLOAT(),
+               existing_nullable=False)
+    # ### end Alembic commands ###
--- a/7project/src/backend/alembic/versions/2025_10_30_1342-59cebf320c4a_cascade_categories.py
+++ b/7project/src/backend/alembic/versions/2025_10_30_1342-59cebf320c4a_cascade_categories.py
@@ -0,0 +1,46 @@
+"""Cascade categories
+
+Revision ID: 59cebf320c4a
+Revises: 46b9e702e83f
+Create Date: 2025-10-30 13:42:44.555284
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision: str = '59cebf320c4a'
+down_revision: Union[str, Sequence[str], None] = '46b9e702e83f'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('category_transaction', sa.Column('category_id', sa.Integer(), nullable=False))
+    op.add_column('category_transaction', sa.Column('transaction_id', sa.Integer(), nullable=False))
+    op.drop_constraint(op.f('category_transaction_ibfk_2'), 'category_transaction', type_='foreignkey')
+    op.drop_constraint(op.f('category_transaction_ibfk_1'), 'category_transaction', type_='foreignkey')
+    op.create_foreign_key(None, 'category_transaction', 'transaction', ['transaction_id'], ['id'], ondelete='CASCADE')
+    op.create_foreign_key(None, 'category_transaction', 'categories', ['category_id'], ['id'], ondelete='CASCADE')
+    op.drop_column('category_transaction', 'id_category')
+    op.drop_column('category_transaction', 'id_transaction')
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('category_transaction', sa.Column('id_transaction', mysql.INTEGER(display_width=11), autoincrement=False, nullable=True))
+    op.add_column('category_transaction', sa.Column('id_category', mysql.INTEGER(display_width=11), autoincrement=False, nullable=True))
+    op.drop_constraint(None, 'category_transaction', type_='foreignkey')
+    op.drop_constraint(None, 'category_transaction', type_='foreignkey')
+    op.create_foreign_key(op.f('category_transaction_ibfk_1'), 'category_transaction', 'categories', ['id_category'], ['id'])
+    op.create_foreign_key(op.f('category_transaction_ibfk_2'), 'category_transaction', 'transaction', ['id_transaction'], ['id'])
+    op.drop_column('category_transaction', 'transaction_id')
+    op.drop_column('category_transaction', 'category_id')
+    # ### end Alembic commands ###
--- a/7project/src/backend/app/init.py
+++ b/7project/src/backend/app/init.py
--- a/7project/src/backend/app/api/.keep
+++ b/7project/src/backend/app/api/.keep
--- a/7project/src/backend/app/api/init.py
+++ b/7project/src/backend/app/api/init.py
--- a/7project/src/backend/app/api/auth.py
+++ b/7project/src/backend/app/api/auth.py
@@ -0,0 +1,66 @@
+from fastapi import APIRouter, Depends, status
+from fastapi_users import models
+from fastapi_users.manager import BaseUserManager
+
+from app.schemas.user import UserCreate, UserRead, UserUpdate
+from app.services.user_service import auth_backend, fastapi_users
+
+router = APIRouter()
+
+@router.delete(
+    "/users/me",
+    status_code=status.HTTP_204_NO_CONTENT,
+    tags=["users"],
+    summary="Delete current user",
+    response_description="The user has been successfully deleted.",
+)
+async def delete_me(
+    user: models.UserProtocol = Depends(fastapi_users.current_user(active=True)),
+    user_manager: BaseUserManager = Depends(fastapi_users.get_user_manager),
+):
+    """
+    Delete the currently authenticated user.
+    """
+    await user_manager.delete(user)
+
+# Keep existing paths as-is under /auth/* and /users/*
+from fastapi import Request, Response
+from app.core.security import revoke_token, extract_bearer_token
+
+
+@router.post(
+    "/auth/jwt/logout",
+    status_code=status.HTTP_204_NO_CONTENT,
+    tags=["auth"],
+    summary="Log out and revoke current token",
+)
+async def custom_logout(request: Request) -> Response:
+    """Revoke the current bearer token so it cannot be used anymore."""
+    token = extract_bearer_token(request)
+    if token:
+        revoke_token(token)
+    return Response(status_code=status.HTTP_204_NO_CONTENT)
+
+router.include_router(
+    fastapi_users.get_auth_router(auth_backend), prefix="/auth/jwt", tags=["auth"]
+)
+router.include_router(
+    fastapi_users.get_register_router(UserRead, UserCreate),
+    prefix="/auth",
+    tags=["auth"],
+)
+router.include_router(
+    fastapi_users.get_reset_password_router(),
+    prefix="/auth",
+    tags=["auth"],
+)
+router.include_router(
+    fastapi_users.get_verify_router(UserRead),
+    prefix="/auth",
+    tags=["auth"],
+)
+router.include_router(
+    fastapi_users.get_users_router(UserRead, UserUpdate),
+    prefix="/users",
+    tags=["users"],
+)
--- a/7project/src/backend/app/api/categories.py
+++ b/7project/src/backend/app/api/categories.py
@@ -0,0 +1,108 @@
+from typing import List
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy import select, delete
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.categories import Category
+from app.schemas.category import CategoryCreate, CategoryRead, CategoryUpdate
+from app.services.db import get_async_session
+from app.services.user_service import current_active_user
+from app.models.user import User
+
+router = APIRouter(prefix="/categories", tags=["categories"])
+
+
+@router.post("/create", response_model=CategoryRead, status_code=status.HTTP_201_CREATED)
+async def create_category(
+    payload: CategoryCreate,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    # Enforce per-user unique name via query to provide 409 feedback
+    res = await session.execute(
+        select(Category).where(Category.user_id == user.id, Category.name == payload.name)
+    )
+    existing = res.scalar_one_or_none()
+    if existing:
+        raise HTTPException(status_code=409, detail="Category with this name already exists")
+
+    category = Category(name=payload.name, description=payload.description, user_id=user.id)
+    session.add(category)
+    await session.commit()
+    await session.refresh(category)
+    return category
+
+
+@router.get("/", response_model=List[CategoryRead])
+async def list_categories(
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res = await session.execute(select(Category).where(Category.user_id == user.id))
+    return list(res.scalars())
+
+
+@router.patch("/{category_id}", response_model=CategoryRead)
+async def update_category(
+    category_id: int,
+    payload: CategoryUpdate,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res = await session.execute(
+        select(Category).where(Category.id == category_id, Category.user_id == user.id)
+    )
+    category = res.scalar_one_or_none()
+    if not category:
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    # If name changed, check uniqueness per user
+    if payload.name is not None and payload.name != category.name:
+        dup = await session.execute(
+            select(Category.id).where(Category.user_id == user.id, Category.name == payload.name)
+        )
+        if dup.scalar_one_or_none() is not None:
+            raise HTTPException(status_code=409, detail="Category with this name already exists")
+        category.name = payload.name
+
+    if payload.description is not None:
+        category.description = payload.description
+
+    await session.commit()
+    await session.refresh(category)
+    return category
+
+
+@router.get("/{category_id}", response_model=CategoryRead)
+async def get_category(
+    category_id: int,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res = await session.execute(
+        select(Category).where(Category.id == category_id, Category.user_id == user.id)
+    )
+    category = res.scalar_one_or_none()
+    if not category:
+        raise HTTPException(status_code=404, detail="Category not found")
+    return category
+
+
+@router.delete("/{category_id}", status_code=status.HTTP_204_NO_CONTENT)
+async def delete_category(
+    category_id: int,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res = await session.execute(
+        select(Category.id).where(Category.id == category_id, Category.user_id == user.id)
+    )
+    if res.scalar_one_or_none() is None:
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    await session.execute(
+        delete(Category).where(Category.id == category_id, Category.user_id == user.id)
+    )
+    await session.commit()
+    return None
--- a/7project/src/backend/app/api/csas.py
+++ b/7project/src/backend/app/api/csas.py
@@ -0,0 +1,40 @@
+import json
+import os
+
+from fastapi import APIRouter
+from fastapi.params import Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.user import User
+from app.oauth.csas import CSASOAuth
+from app.services.db import get_async_session
+from app.services.user_service import current_active_user
+
+router = APIRouter(prefix="/auth/csas", tags=["csas"])
+
+CLIENT_ID = os.getenv("CSAS_CLIENT_ID")
+CLIENT_SECRET = os.getenv("CSAS_CLIENT_SECRET")
+CSAS_OAUTH = CSASOAuth(CLIENT_ID, CLIENT_SECRET)
+
+
+@router.get("/authorize")
+async def csas_authorize():
+    return {"authorization_url":
+                await CSAS_OAUTH.get_authorization_url(os.getenv("FRONTEND_DOMAIN_SCHEME") + "/auth/csas/callback")}
+
+
+@router.get("/callback")
+async def csas_callback(code: str, session: AsyncSession = Depends(get_async_session),
+                        user: User = Depends(current_active_user)):
+    response = await CSAS_OAUTH.get_access_token(code, os.getenv("FRONTEND_DOMAIN_SCHEME") + "/auth/csas/callback")
+
+    if not user.config:
+        user.config = {}
+
+    new_dict = user.config.copy()
+    new_dict["csas"] = json.dumps(response)
+
+    user.config = new_dict
+    await session.commit()
+
+    return "OK"
--- a/7project/src/backend/app/api/exchange_rates.py
+++ b/7project/src/backend/app/api/exchange_rates.py
@@ -0,0 +1,66 @@
+import os
+from typing import List
+
+import httpx
+from fastapi import APIRouter, HTTPException, Query, status
+
+router = APIRouter(prefix="/exchange-rates", tags=["exchange-rates"]) 
+
+
+@router.get("", status_code=status.HTTP_200_OK)
+async def get_exchange_rates(symbols: str = Query("EUR,USD,NOK", description="Comma-separated currency codes to fetch vs CZK")):
+    """
+    Fetch exchange rates from UniRate API on the backend and return CZK-per-target rates.
+    - Always requests CZK in addition to requested symbols to compute conversion from USD-base.
+    - Returns a list of {currencyCode, rate} where rate is CZK per 1 unit of the target currency.
+    """
+    api_key = os.getenv("UNIRATE_API_KEY")
+    if not api_key:
+        raise HTTPException(status_code=500, detail="Server is not configured with UNIRATE_API_KEY")
+
+    # Ensure CZK is included for conversion
+    requested = [s.strip().upper() for s in symbols.split(",") if s.strip()]
+    if "CZK" not in requested:
+        requested.append("CZK")
+    query_symbols = ",".join(sorted(set(requested)))
+
+    url = f"https://unirateapi.com/api/rates?api_key={api_key}&symbols={query_symbols}"
+
+    try:
+        async with httpx.AsyncClient(timeout=httpx.Timeout(15.0)) as client:
+            resp = await client.get(url)
+            if resp.status_code != httpx.codes.OK:
+                raise HTTPException(status_code=502, detail=f"Upstream UniRate error: HTTP {resp.status_code}")
+            data = resp.json()
+    except httpx.HTTPError as e:
+        raise HTTPException(status_code=502, detail=f"Failed to contact UniRate: {str(e)}")
+
+    # Validate response structure
+    rates = data.get("rates") if isinstance(data, dict) else None
+    base = data.get("base") if isinstance(data, dict) else None
+    if not rates or base != "USD" or "CZK" not in rates:
+        # Prefer upstream message when available
+        detail = data.get("message") if isinstance(data, dict) else None
+        if not detail and isinstance(data, dict):
+            err = data.get("error")
+            if isinstance(err, dict):
+                detail = err.get("info")
+        raise HTTPException(status_code=502, detail=detail or "Invalid response from UniRate API")
+
+    czk_per_usd = rates["CZK"]
+
+    # Build result excluding CZK itself
+    result = []
+    for code in requested:
+        if code == "CZK":
+            continue
+        target_per_usd = rates.get(code)
+        if target_per_usd in (None, 0):
+            # Skip unavailable or invalid
+            continue
+        czk_per_target = czk_per_usd / target_per_usd
+        result.append({"currencyCode": code, "rate": czk_per_target})
+
+    return result
+
+
--- a/7project/src/backend/app/api/mock_bank.py
+++ b/7project/src/backend/app/api/mock_bank.py
@@ -0,0 +1,116 @@
+from datetime import datetime, timedelta
+from typing import List, Optional
+import random
+
+from fastapi import APIRouter, Depends
+from pydantic import BaseModel, Field, conint, confloat, validator
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.services.db import get_async_session
+from app.services.user_service import current_active_user
+from app.models.user import User
+from app.models.transaction import Transaction
+from app.models.categories import Category
+from app.schemas.transaction import TransactionRead
+
+router = APIRouter(prefix="/mock-bank", tags=["mock-bank"])
+
+
+class GenerateOptions(BaseModel):
+    count: conint(strict=True, gt=0) = Field(default=10, description="Number of transactions to generate")
+    minAmount: confloat(strict=True) = Field(default=-200.0, description="Minimum transaction amount")
+    maxAmount: confloat(strict=True) = Field(default=200.0, description="Maximum transaction amount")
+    startDate: Optional[str] = Field(None, description="Earliest date (YYYY-MM-DD)")
+    endDate: Optional[str] = Field(None, description="Latest date (YYYY-MM-DD)")
+    categoryIds: List[int] = Field(default_factory=list, description="Optional category IDs to assign randomly")
+
+    @validator("maxAmount")
+    def _validate_amounts(cls, v, values):
+        min_amt = values.get("minAmount")
+        if min_amt is not None and v < min_amt:
+            raise ValueError("maxAmount must be greater than or equal to minAmount")
+        return v
+
+    @validator("endDate")
+    def _validate_dates(cls, v, values):
+        sd = values.get("startDate")
+        if v and sd:
+            try:
+                ed = datetime.strptime(v, "%Y-%m-%d").date()
+                st = datetime.strptime(sd, "%Y-%m-%d").date()
+            except ValueError:
+                raise ValueError("Invalid date format, expected YYYY-MM-DD")
+            if ed < st:
+                raise ValueError("endDate must be greater than or equal to startDate")
+        return v
+
+
+class GeneratedTransaction(BaseModel):
+    amount: float
+    date: str  # YYYY-MM-DD
+    category_ids: List[int] = []
+    description: Optional[str] = None
+
+
+@router.post("/generate", response_model=List[GeneratedTransaction])
+async def generate_mock_transactions(
+        options: GenerateOptions,
+        user: User = Depends(current_active_user),
+):
+    # Seed randomness per user to make results less erratic across multiple calls in quick succession
+    seed = int(datetime.utcnow().timestamp()) ^ int(user.id)
+    rnd = random.Random(seed)
+
+    # Determine date range
+    if options.startDate:
+        start_date = datetime.strptime(options.startDate, "%Y-%m-%d").date()
+    else:
+        start_date = (datetime.utcnow() - timedelta(days=365)).date()
+    if options.endDate:
+        end_date = datetime.strptime(options.endDate, "%Y-%m-%d").date()
+    else:
+        end_date = datetime.utcnow().date()
+
+    span_days = max(0, (end_date - start_date).days)
+
+    results: List[GeneratedTransaction] = []
+    for _ in range(options.count):
+        amount = round(rnd.uniform(options.minAmount, options.maxAmount), 2)
+        # Pick a random date in the inclusive range
+        rand_day = rnd.randint(0, span_days) if span_days > 0 else 0
+        tx_date = start_date + timedelta(days=rand_day)
+        # Pick category randomly from provided list, or empty
+        if options.categoryIds:
+            cat = [rnd.choice(options.categoryIds)]
+        else:
+            cat = []
+        # Optional simple description for flavor
+        desc = None
+        # Assemble
+        results.append(GeneratedTransaction(
+            amount=amount,
+            date=tx_date.isoformat(),
+            category_ids=cat,
+            description=desc,
+        ))
+
+    return results
+
+
+@router.get("/scrape")
+async def scrape_mock_bank():
+    # 80% of the time: nothing to scrape
+    if random.random() < 0.8:
+        return []
+
+    transactions = []
+    count = random.randint(1, 10)
+    for _ in range(count):
+        transactions.append({
+            "amount": round(random.uniform(-200.0, 200.0), 2),
+            "date": (datetime.utcnow().date() - timedelta(days=random.randint(0, 30))).isoformat(),
+            "description": "Mock transaction",
+        })
+
+    return transactions
--- a/7project/src/backend/app/api/transactions.py
+++ b/7project/src/backend/app/api/transactions.py
@@ -0,0 +1,280 @@
+from typing import List, Optional
+from datetime import date
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy import select, and_, func
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.transaction import Transaction
+from app.models.categories import Category
+from app.schemas.transaction import (
+    TransactionCreate,
+    TransactionRead,
+    TransactionUpdate,
+)
+from app.services.db import get_async_session
+from app.services.user_service import current_active_user
+from app.models.user import User
+
+router = APIRouter(prefix="/transactions", tags=["transactions"])
+
+
+def _to_read_model(tx: Transaction) -> TransactionRead:
+    return TransactionRead(
+        id=tx.id,
+        amount=tx.amount,
+        description=tx.description,
+        date=tx.date,
+        category_ids=[c.id for c in (tx.categories or [])],
+    )
+
+
+@router.post("/create", response_model=TransactionRead, status_code=status.HTTP_201_CREATED)
+async def create_transaction(
+    payload: TransactionCreate,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    # Build transaction; set `date` only if provided to let DB default apply otherwise
+    tx_kwargs = dict(
+        amount=payload.amount,
+        description=payload.description,
+        user_id=user.id,
+    )
+    if payload.date is not None:
+        parsed_date = payload.date
+        if isinstance(parsed_date, str):
+            try:
+                parsed_date = date.fromisoformat(parsed_date)
+            except ValueError:
+                raise HTTPException(status_code=400, detail="Invalid date format, expected YYYY-MM-DD")
+        tx_kwargs["date"] = parsed_date
+    tx = Transaction(**tx_kwargs)
+
+    # Attach categories if provided (and owned by user)
+    if payload.category_ids:
+        res = await session.execute(
+            select(Category).where(
+                Category.user_id == user.id, Category.id.in_(payload.category_ids)
+            )
+        )
+        categories = list(res.scalars())
+        if len(categories) != len(set(payload.category_ids)):
+            raise HTTPException(
+                status_code=400,
+                detail="Duplicate category IDs provided or one or more categories not found"
+            )
+        tx.categories = categories
+
+    session.add(tx)
+    await session.commit()
+    await session.refresh(tx)
+    # Ensure categories are loaded
+    await session.refresh(tx, attribute_names=["categories"])
+    return _to_read_model(tx)
+
+
+@router.get("/", response_model=List[TransactionRead])
+async def list_transactions(
+    start_date: Optional[date] = None,
+    end_date: Optional[date] = None,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    cond = [Transaction.user_id == user.id]
+    if start_date is not None:
+        cond.append(Transaction.date >= start_date)
+    if end_date is not None:
+        cond.append(Transaction.date <= end_date)
+    res = await session.execute(
+        select(Transaction).where(and_(*cond)).order_by(Transaction.date, Transaction.id)
+    )
+    txs = list(res.scalars())
+    # Eagerly load categories for each transaction
+    for tx in txs:
+        await session.refresh(tx, attribute_names=["categories"])
+    return [_to_read_model(tx) for tx in txs]
+
+
+@router.get("/balance_series")
+async def get_balance_series(
+    start_date: Optional[date] = None,
+    end_date: Optional[date] = None,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    cond = [Transaction.user_id == user.id]
+    if start_date is not None:
+        cond.append(Transaction.date >= start_date)
+    if end_date is not None:
+        cond.append(Transaction.date <= end_date)
+    res = await session.execute(
+        select(Transaction).where(and_(*cond)).order_by(Transaction.date, Transaction.id)
+    )
+    txs = list(res.scalars())
+    # Group by date and accumulate
+    daily = {}
+    for tx in txs:
+        key = tx.date.isoformat() if hasattr(tx.date, 'isoformat') else str(tx.date)
+        daily[key] = daily.get(key, 0.0) + float(tx.amount)
+    # Build cumulative series sorted by date
+    series = []
+    running = 0.0
+    for d in sorted(daily.keys()):
+        running += daily[d]
+        series.append({"date": d, "balance": running})
+    return series
+
+
+@router.get("/{transaction_id}", response_model=TransactionRead)
+async def get_transaction(
+    transaction_id: int,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res = await session.execute(
+        select(Transaction).where(
+            Transaction.id == transaction_id, Transaction.user_id == user.id
+        )
+    )
+    tx: Optional[Transaction] = res.scalar_one_or_none()
+    if not tx:
+        raise HTTPException(status_code=404, detail="Transaction not found")
+    await session.refresh(tx, attribute_names=["categories"])
+    return _to_read_model(tx)
+
+
+@router.patch("/{transaction_id}/edit", response_model=TransactionRead)
+async def update_transaction(
+    transaction_id: int,
+    payload: TransactionUpdate,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res = await session.execute(
+        select(Transaction).where(
+            Transaction.id == transaction_id, Transaction.user_id == user.id
+        )
+    )
+    tx: Optional[Transaction] = res.scalar_one_or_none()
+    if not tx:
+        raise HTTPException(status_code=404, detail="Transaction not found")
+
+    if payload.amount is not None:
+        tx.amount = payload.amount
+    if payload.description is not None:
+        tx.description = payload.description
+    if payload.date is not None:
+        new_date = payload.date
+        if isinstance(new_date, str):
+            try:
+                new_date = date.fromisoformat(new_date)
+            except ValueError:
+                raise HTTPException(status_code=400, detail="Invalid date format, expected YYYY-MM-DD")
+        tx.date = new_date
+
+    if payload.category_ids is not None:
+        # Preload categories to avoid async lazy-load during assignment
+        await session.refresh(tx, attribute_names=["categories"])
+        if payload.category_ids:
+            # Check for duplicate category IDs in the payload
+            if len(payload.category_ids) != len(set(payload.category_ids)):
+                raise HTTPException(status_code=400, detail="Duplicate category IDs in payload")
+            res = await session.execute(
+                select(Category).where(
+                    Category.user_id == user.id, Category.id.in_(payload.category_ids)
+                )
+            )
+            categories = list(res.scalars())
+            if len(categories) != len(payload.category_ids):
+                raise HTTPException(status_code=400, detail="One or more categories not found")
+            tx.categories = categories
+        else:
+            tx.categories = []
+
+    await session.commit()
+    await session.refresh(tx, attribute_names=["categories"])
+    return _to_read_model(tx)
+
+
+@router.delete("/{transaction_id}/delete", status_code=status.HTTP_204_NO_CONTENT)
+async def delete_transaction(
+    transaction_id: int,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res = await session.execute(
+        select(Transaction).where(
+            Transaction.id == transaction_id, Transaction.user_id == user.id
+        )
+    )
+    tx = res.scalar_one_or_none()
+    if not tx:
+        raise HTTPException(status_code=404, detail="Transaction not found")
+
+    await session.delete(tx)
+    await session.commit()
+    return None
+
+
+@router.post("/{transaction_id}/categories/{category_id}", response_model=TransactionRead)
+async def assign_category(
+    transaction_id: int,
+    category_id: int,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    # Load transaction and category ensuring ownership
+    res_tx = await session.execute(
+        select(Transaction).where(
+            Transaction.id == transaction_id, Transaction.user_id == user.id
+        )
+    )
+    tx: Optional[Transaction] = res_tx.scalar_one_or_none()
+    if not tx:
+        raise HTTPException(status_code=404, detail="Transaction not found")
+
+    res_cat = await session.execute(
+        select(Category).where(Category.id == category_id, Category.user_id == user.id)
+    )
+    cat: Optional[Category] = res_cat.scalar_one_or_none()
+    if not cat:
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    await session.refresh(tx, attribute_names=["categories"])
+    if cat not in tx.categories:
+        tx.categories.append(cat)
+        await session.commit()
+        await session.refresh(tx, attribute_names=["categories"])
+    return _to_read_model(tx)
+
+
+@router.delete("/{transaction_id}/categories/{category_id}", response_model=TransactionRead)
+async def unassign_category(
+    transaction_id: int,
+    category_id: int,
+    session: AsyncSession = Depends(get_async_session),
+    user: User = Depends(current_active_user),
+):
+    res_tx = await session.execute(
+        select(Transaction).where(
+            Transaction.id == transaction_id, Transaction.user_id == user.id
+        )
+    )
+    tx: Optional[Transaction] = res_tx.scalar_one_or_none()
+    if not tx:
+        raise HTTPException(status_code=404, detail="Transaction not found")
+
+    res_cat = await session.execute(
+        select(Category).where(Category.id == category_id, Category.user_id == user.id)
+    )
+    cat: Optional[Category] = res_cat.scalar_one_or_none()
+    if not cat:
+        raise HTTPException(status_code=404, detail="Category not found")
+
+    await session.refresh(tx, attribute_names=["categories"])
+    if cat in tx.categories:
+        tx.categories.remove(cat)
+        await session.commit()
+        await session.refresh(tx, attribute_names=["categories"])
+    return _to_read_model(tx)
--- a/7project/src/backend/app/app.py
+++ b/7project/src/backend/app/app.py
@@ -0,0 +1,176 @@
+import json
+import logging
+import os
+import sys
+from datetime import datetime
+from pythonjsonlogger import jsonlogger
+
+from fastapi import Depends, FastAPI, HTTPException
+from fastapi.middleware.cors import CORSMiddleware
+from prometheus_fastapi_instrumentator import Instrumentator, metrics
+from starlette.requests import Request
+
+from app.services.prometheus import number_of_users, number_of_transactions
+
+from app.services import bank_scraper
+from app.workers.celery_tasks import load_transactions, load_all_transactions
+from app.models.user import User, OAuthAccount
+
+from app.services.user_service import current_active_verified_user
+from app.api.auth import router as auth_router
+from app.api.csas import router as csas_router
+from app.api.categories import router as categories_router
+from app.api.transactions import router as transactions_router
+from app.api.exchange_rates import router as exchange_rates_router
+from app.services.user_service import auth_backend, current_active_verified_user, fastapi_users, get_oauth_provider, \
+    UserManager, get_jwt_strategy
+from app.core.security import extract_bearer_token, is_token_revoked, decode_and_verify_jwt
+from app.services.user_service import SECRET
+
+from fastapi import FastAPI
+import sentry_sdk
+from fastapi_users.db import SQLAlchemyUserDatabase
+from app.core.db import async_session_maker, engine
+from app.core.base import Base
+
+sentry_sdk.init(
+    dsn=os.getenv("SENTRY_DSN"),
+    send_default_pii=True,
+)
+
+fastApi = FastAPI()
+
+# CORS for frontend dev server
+fastApi.add_middleware(
+    CORSMiddleware,
+    allow_origins=[
+        "http://localhost:5173",
+        "http://127.0.0.1:5173",
+        os.getenv("FRONTEND_DOMAIN_SCHEME", "")
+    ],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+if not os.getenv("PYTEST_RUN_CONFIG"):
+    prometheus = Instrumentator().instrument(fastApi)
+    # Register custom metrics
+    prometheus.add(number_of_users()).add(number_of_transactions())
+    prometheus.expose(
+        fastApi,
+        endpoint="/metrics",
+        include_in_schema=True,
+    )
+
+fastApi.include_router(auth_router)
+fastApi.include_router(categories_router)
+fastApi.include_router(transactions_router)
+fastApi.include_router(exchange_rates_router)
+from app.api.mock_bank import router as mock_bank_router
+fastApi.include_router(mock_bank_router)
+
+for h in list(logging.root.handlers):
+    logging.root.removeHandler(h)
+
+_log_handler = logging.StreamHandler(sys.stdout)
+_formatter = jsonlogger.JsonFormatter(
+    fmt='%(asctime)s %(levelname)s %(name)s %(message)s %(pathname)s %(lineno)d %(process)d %(thread)d'
+)
+_log_handler.setFormatter(_formatter)
+
+logging.root.setLevel(logging.INFO)
+logging.root.addHandler(_log_handler)
+
+for _name in ("uvicorn", "uvicorn.error", "uvicorn.access"):
+    _logger = logging.getLogger(_name)
+    _logger.handlers = [_log_handler]
+    _logger.propagate = True
+
+
+@fastApi.middleware("http")
+async def auth_guard(request: Request, call_next):
+    # Enforce revoked/expired JWTs are rejected globally
+    token = extract_bearer_token(request)
+    if token:
+        from fastapi import Response, status as _status
+        # Deny if token is revoked
+        if is_token_revoked(token):
+            return Response(status_code=_status.HTTP_401_UNAUTHORIZED)
+        # Deny if token is expired or invalid
+        try:
+            decode_and_verify_jwt(token, SECRET)
+        except Exception:
+            return Response(status_code=_status.HTTP_401_UNAUTHORIZED)
+    return await call_next(request)
+
+
+@fastApi.middleware("http")
+async def log_traffic(request: Request, call_next):
+    start_time = datetime.now()
+    response = await call_next(request)
+    process_time = (datetime.now() - start_time).total_seconds()
+    client_host = request.client.host
+    log_params = {
+        "request_method": request.method,
+        "request_url": str(request.url),
+        "request_size": request.headers.get("content-length"),
+        "request_headers": dict(request.headers),
+        "response_status": response.status_code,
+        "response_size": response.headers.get("content-length"),
+        "response_headers": dict(response.headers),
+        "process_time": process_time,
+        "client_host": client_host
+    }
+    logging.getLogger(__name__).info("http_request", extra=log_params)
+    return response
+
+
+fastApi.include_router(
+    fastapi_users.get_oauth_router(
+        get_oauth_provider("MojeID"),
+        auth_backend,
+        "SECRET",
+        associate_by_email=True,
+        redirect_url=os.getenv("FRONTEND_DOMAIN_SCHEME", "http://localhost:3000") + "/auth/mojeid/callback",
+    ),
+    prefix="/auth/mojeid",
+    tags=["auth"],
+)
+
+fastApi.include_router(
+    fastapi_users.get_oauth_router(
+        get_oauth_provider("BankID"),
+        auth_backend,
+        "SECRET",
+        associate_by_email=True,
+        redirect_url=os.getenv("FRONTEND_DOMAIN_SCHEME", "http://localhost:3000") + "/auth/bankid/callback",
+    ),
+    prefix="/auth/bankid",
+    tags=["auth"],
+)
+
+fastApi.include_router(csas_router)
+
+
+# Liveness/root endpoint
+@fastApi.get("/", include_in_schema=False)
+async def root():
+    return {"status": "ok"}
+
+
+@fastApi.get("/authenticated-route")
+async def authenticated_route(user: User = Depends(current_active_verified_user)):
+    return {"message": f"Hello {user.email}!"}
+
+
+@fastApi.get("/_cron", include_in_schema=False)
+async def handle_cron(request: Request):
+    # endpoint accessed by Clodflare => return 404
+    if request.headers.get("cf-connecting-ip"):
+        raise HTTPException(status_code=404)
+
+    logging.info("[Cron] Triggering scheduled tasks via HTTP endpoint")
+    task = load_all_transactions.delay()
+    return {"status": "queued", "action": "csas_scrape_all", "task_id": getattr(task, 'id', None)}
--- a/7project/src/backend/app/celery_app.py
+++ b/7project/src/backend/app/celery_app.py
@@ -0,0 +1,50 @@
+import os
+from celery import Celery
+
+if os.getenv("RABBITMQ_URL"):
+    RABBITMQ_URL = os.getenv("RABBITMQ_URL")  # type: ignore
+else:
+    from urllib.parse import quote
+
+    username = os.getenv("RABBITMQ_USERNAME", "user")
+    password = os.getenv("RABBITMQ_PASSWORD", "bitnami123")
+    host = os.getenv("RABBITMQ_HOST", "localhost")
+    port = os.getenv("RABBITMQ_PORT", "5672")
+    vhost = os.getenv("RABBITMQ_VHOST", "/")
+    use_ssl = os.getenv("RABBITMQ_USE_SSL", "0").lower() in {"1", "true", "yes"}
+    scheme = "amqps" if use_ssl else "amqp"
+
+    # Kombu uses '//' to denote the default '/' vhost. For custom vhosts, URL-encode them.
+    if vhost in ("/", ""):
+        vhost_path = "/"  # will become '//' after concatenation below
+    else:
+        vhost_path = f"/{quote(vhost, safe='')}"
+
+    # Ensure we end up with e.g. amqp://user:pass@host:5672// (for '/')
+    RABBITMQ_URL = f"{scheme}://{username}:{password}@{host}:{port}{vhost_path}"
+    if vhost in ("/", "") and not RABBITMQ_URL.endswith("//"):
+        RABBITMQ_URL += "/"
+
+DEFAULT_QUEUE = os.getenv("MAIL_QUEUE", "mail_queue")
+
+CELERY_BACKEND = os.getenv("CELERY_BACKEND", "rpc://")
+
+celery_app = Celery(
+    "app",
+    broker=RABBITMQ_URL,
+    # backend=CELERY_BACKEND,
+)
+celery_app.autodiscover_tasks(["app.workers"], related_name="celery_tasks")  # discover app.workers.celery_tasks
+
+celery_app.set_default()
+
+celery_app.conf.update(
+    task_default_queue=DEFAULT_QUEUE,
+    task_acks_late=True,
+    worker_prefetch_multiplier=int(os.getenv("CELERY_PREFETCH", "1")),
+    task_serializer="json",
+    result_serializer="json",
+    accept_content=["json"],
+)
+
+__all__ = ["celery_app"]
--- a/7project/src/backend/app/core/init.py
+++ b/7project/src/backend/app/core/init.py
--- a/7project/src/backend/app/core/base.py
+++ b/7project/src/backend/app/core/base.py
@@ -0,0 +1,4 @@
+from sqlalchemy.ext.declarative import DeclarativeMeta, declarative_base
+
+Base: DeclarativeMeta = declarative_base()
+
--- a/7project/src/backend/app/core/db.py
+++ b/7project/src/backend/app/core/db.py
@@ -0,0 +1,45 @@
+import os
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker
+from sqlalchemy import create_engine
+from sqlalchemy.orm import sessionmaker
+from app.core.base import Base
+
+DATABASE_URL = os.getenv("DATABASE_URL")
+if not DATABASE_URL:
+    mariadb_host = os.getenv("MARIADB_HOST", "localhost")
+    mariadb_port = os.getenv("MARIADB_PORT", "3306")
+    mariadb_db = os.getenv("MARIADB_DB", "group_project")
+    mariadb_user = os.getenv("MARIADB_USER", "root")
+    mariadb_password = os.getenv("MARIADB_PASSWORD", "strongpassword")
+    if mariadb_host and mariadb_db and mariadb_user and mariadb_password:
+        DATABASE_URL = f"mysql+asyncmy://{mariadb_user}:{mariadb_password}@{mariadb_host}:{mariadb_port}/{mariadb_db}"
+    else:
+        raise Exception("Only MariaDB is supported. Please set the DATABASE_URL environment variable.")
+
+# Load all models to register them
+from app.models.user import User
+from app.models.transaction import Transaction
+from app.models.categories import Category
+
+host_env = os.getenv("MARIADB_HOST", "localhost")
+ssl_enabled = host_env not in {"localhost", "127.0.0.1"}
+connect_args = {"ssl": {"ssl": True}} if ssl_enabled else {}
+
+# Async engine/session for the async parts of the app
+engine = create_async_engine(
+    DATABASE_URL,
+    pool_pre_ping=True,
+    echo=os.getenv("SQL_ECHO", "0") == "1",
+    connect_args=connect_args,
+)
+async_session_maker = async_sessionmaker(engine, expire_on_commit=False)
+
+# Synchronous engine/session for sync utilities (e.g., bank_scraper)
+SYNC_DATABASE_URL = DATABASE_URL.replace("+asyncmy", "+pymysql")
+engine_sync = create_engine(
+    SYNC_DATABASE_URL,
+    pool_pre_ping=True,
+    echo=os.getenv("SQL_ECHO", "0") == "1",
+    connect_args=connect_args,
+)
+sync_session_maker = sessionmaker(bind=engine_sync, expire_on_commit=False)
--- a/7project/src/backend/app/core/queue.py
+++ b/7project/src/backend/app/core/queue.py
@@ -0,0 +1,6 @@
+import app.celery_app  # noqa: F401
+from app.workers.celery_tasks import send_email
+
+
+def enqueue_email(to: str, subject: str, body: str) -> None:
+    send_email.delay(to, subject, body)
--- a/7project/src/backend/app/core/security.py
+++ b/7project/src/backend/app/core/security.py
@@ -0,0 +1,52 @@
+from typing import Optional
+import re
+import jwt
+from fastapi import Request
+
+# Simple in-memory revocation store for revoked JWT tokens.
+# 
+# Limitations:
+# - All revoked tokens will be lost if the process restarts (data loss on restart).
+# - Not suitable for multi-instance deployments: the revocation list is not shared between instances.
+#   A token revoked in one instance will not be recognized as revoked in others.
+# 
+# For production, use a persistent and shared store (e.g., Redis or a database).
+_REVOKED_TOKENS: set[str] = set()
+
+# Bearer token regex
+_BEARER_RE = re.compile(r"^[Bb]earer\s+(.+)$")
+
+
+def extract_bearer_token(request: Request) -> Optional[str]:
+    auth = request.headers.get("authorization")
+    if not auth:
+        return None
+    m = _BEARER_RE.match(auth)
+    if not m:
+        return None
+    return m.group(1).strip()
+
+
+def revoke_token(token: str) -> None:
+    if token:
+        _REVOKED_TOKENS.add(token)
+
+
+def is_token_revoked(token: str) -> bool:
+    return token in _REVOKED_TOKENS
+
+
+def decode_and_verify_jwt(token: str, secret: str) -> dict:
+    """
+    Decode the JWT using the shared secret, verifying expiration and signature.
+    Audience is not verified here to be compatible with fastapi-users default tokens.
+    Raises jwt.ExpiredSignatureError if expired.
+    Raises jwt.InvalidTokenError for other issues.
+    Returns the decoded payload dict on success.
+    """
+    return jwt.decode(
+        token,
+        secret,
+        algorithms=["HS256"],
+        options={"verify_aud": False},
+    )  # verify_exp is True by default
--- a/7project/src/backend/app/models/init.py
+++ b/7project/src/backend/app/models/init.py
--- a/7project/src/backend/app/models/categories.py
+++ b/7project/src/backend/app/models/categories.py
@@ -0,0 +1,25 @@
+from fastapi_users_db_sqlalchemy import GUID
+from sqlalchemy import Column, Integer, String, ForeignKey, Table, UniqueConstraint
+from sqlalchemy.orm import relationship
+
+from app.core.base import Base
+
+association_table = Table(
+    "category_transaction",
+    Base.metadata,
+    Column("category_id", Integer, ForeignKey("categories.id", ondelete="CASCADE"), primary_key=True),
+    Column("transaction_id", Integer, ForeignKey("transaction.id", ondelete="CASCADE"), primary_key=True)
+)
+
+
+class Category(Base):
+    __tablename__ = "categories"
+    __table_args__ = (
+        UniqueConstraint("name", "user_id", name="uix_name_user_id"),
+    )
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    name = Column(String(length=100), nullable=False)
+    description = Column(String(length=255), nullable=True)
+    user_id = Column(GUID, ForeignKey("user.id"), nullable=False)
+    user = relationship("User", back_populates="categories")
+    transactions = relationship("Transaction", secondary=association_table, back_populates="categories")
--- a/7project/src/backend/app/models/transaction.py
+++ b/7project/src/backend/app/models/transaction.py
@@ -0,0 +1,24 @@
+import os
+from fastapi_users_db_sqlalchemy import GUID
+from sqlalchemy import Column, Integer, String, Float, ForeignKey, Date, func
+from sqlalchemy.orm import relationship
+from sqlalchemy_utils import EncryptedType
+from sqlalchemy_utils.types.encrypted.encrypted_type import FernetEngine
+
+from app.core.base import Base
+from app.models.categories import association_table
+
+SECRET_KEY = os.environ.get("DB_ENCRYPTION_KEY", "localdev")
+
+
+class Transaction(Base):
+    __tablename__ = "transaction"
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    amount = Column(EncryptedType(Float, SECRET_KEY, engine=FernetEngine), nullable=False)
+    description = Column(EncryptedType(String(length=255), SECRET_KEY, engine=FernetEngine), nullable=True)
+    date = Column(Date, nullable=False, server_default=func.current_date())
+    user_id = Column(GUID, ForeignKey("user.id"), nullable=False)
+
+    # Relationship
+    user = relationship("User", back_populates="transactions")
+    categories = relationship("Category", secondary=association_table, back_populates="transactions", passive_deletes=True)
--- a/7project/src/backend/app/models/user.py
+++ b/7project/src/backend/app/models/user.py
@@ -0,0 +1,22 @@
+from sqlalchemy import Column, String
+from sqlalchemy.orm import relationship, mapped_column, Mapped
+from fastapi_users.db import SQLAlchemyBaseUserTableUUID, SQLAlchemyBaseOAuthAccountTableUUID
+from sqlalchemy.sql.sqltypes import JSON
+
+from app.core.base import Base
+
+
+class OAuthAccount(SQLAlchemyBaseOAuthAccountTableUUID, Base):
+    # BankID token is longer than default
+    access_token: Mapped[str] = mapped_column(String(length=4096), nullable=False)
+
+
+class User(SQLAlchemyBaseUserTableUUID, Base):
+    first_name = Column(String(length=100), nullable=True)
+    last_name = Column(String(length=100), nullable=True)
+    oauth_accounts = relationship("OAuthAccount", lazy="joined")
+    config = Column(JSON, default={})
+
+    # Relationship
+    transactions = relationship("Transaction", back_populates="user")
+    categories = relationship("Category", back_populates="user")
--- a/7project/src/backend/app/oauth/init.py
+++ b/7project/src/backend/app/oauth/init.py
--- a/7project/src/backend/app/oauth/bank_id.py
+++ b/7project/src/backend/app/oauth/bank_id.py
@@ -0,0 +1,50 @@
+import secrets
+from typing import Optional, Literal
+
+from httpx_oauth.oauth2 import T
+
+from app.oauth.custom_openid import CustomOpenID
+
+
+class BankID(CustomOpenID):
+    def __init__(self, client_id: str, client_secret: str):
+        super().__init__(
+            client_id,
+            client_secret,
+            "https://oidc.sandbox.bankid.cz/.well-known/openid-configuration",
+            "BankID",
+            base_scopes=["openid", "profile.email", "profile.name"],
+        )
+
+    async def get_user_info(self, token: str) -> dict:
+        info = await self.get_profile(token)
+
+        return {
+            "first_name": info.get("given_name"),
+            "last_name": info.get("family_name"),
+        }
+
+    async def get_authorization_url(
+            self,
+            redirect_uri: str,
+            state: Optional[str] = None,
+            scope: Optional[list[str]] = None,
+            code_challenge: Optional[str] = None,
+            code_challenge_method: Optional[Literal["plain", "S256"]] = None,
+            extras_params: Optional[T] = None,
+    ) -> str:
+        if extras_params is None:
+            extras_params = {}
+
+        # BankID requires random nonce parameter for security
+        # https://developer.bankid.cz/docs/security_sep
+        extras_params["nonce"] = secrets.token_urlsafe()
+
+        return await super().get_authorization_url(
+            redirect_uri,
+            state,
+            scope,
+            code_challenge,
+            code_challenge_method,
+            extras_params,
+        )
--- a/7project/src/backend/app/oauth/csas.py
+++ b/7project/src/backend/app/oauth/csas.py
@@ -0,0 +1,33 @@
+import os
+from os.path import dirname, join
+from typing import Optional, Any
+
+import httpx
+from httpx_oauth.exceptions import GetProfileError
+from httpx_oauth.oauth2 import BaseOAuth2
+
+import app.services.db
+
+BASE_DIR = dirname(__file__)
+certs = (
+    join(BASE_DIR, "public_key.pem"),
+    join(BASE_DIR, "private_key.key")
+)
+
+class CSASOAuth(BaseOAuth2):
+
+    def __init__(self, client_id: str, client_secret: str):
+        super().__init__(
+            client_id,
+            client_secret,
+            base_scopes=["aisp"],
+            authorize_endpoint="https://webapi.developers.erstegroup.com/api/csas/sandbox/v1/sandbox-idp/auth",
+            access_token_endpoint="https://webapi.developers.erstegroup.com/api/csas/sandbox/v1/sandbox-idp/token",
+            refresh_token_endpoint="https://webapi.developers.erstegroup.com/api/csas/sandbox/v1/sandbox-idp/token"
+        )
+
+
+
+
+
+
--- a/7project/src/backend/app/oauth/custom_openid.py
+++ b/7project/src/backend/app/oauth/custom_openid.py
@@ -0,0 +1,6 @@
+from httpx_oauth.clients.openid import OpenID
+
+
+class CustomOpenID(OpenID):
+    async def get_user_info(self, token: str) -> dict:
+        raise NotImplementedError()
--- a/7project/src/backend/app/oauth/moje_id.py
+++ b/7project/src/backend/app/oauth/moje_id.py
@@ -0,0 +1,56 @@
+import json
+from typing import Optional, Literal, Any
+
+from httpx_oauth.oauth2 import T
+
+from app.oauth.custom_openid import CustomOpenID
+
+
+class MojeIDOAuth(CustomOpenID):
+    def __init__(self, client_id: str, client_secret: str):
+        super().__init__(
+            client_id,
+            client_secret,
+            "https://mojeid.cz/.well-known/openid-configuration/",
+            "MojeID",
+            base_scopes=["openid", "email", "profile"],
+        )
+
+    async def get_user_info(self, token: str) -> Optional[Any]:
+        info = await self.get_profile(token)
+
+        return {
+            "first_name": info.get("given_name"),
+            "last_name": info.get("family_name"),
+        }
+
+    async def get_authorization_url(
+            self,
+            redirect_uri: str,
+            state: Optional[str] = None,
+            scope: Optional[list[str]] = None,
+            code_challenge: Optional[str] = None,
+            code_challenge_method: Optional[Literal["plain", "S256"]] = None,
+            extras_params: Optional[T] = None,
+    ) -> str:
+        required_fields = {
+            'id_token': {
+                'name': {'essential': True},
+                'given_name': {'essential': True},
+                'family_name': {'essential': True},
+                'email': {'essential': True},
+                'mojeid_valid': {'essential': True},
+            }}
+
+        if extras_params is None:
+            extras_params = {}
+        extras_params["claims"] = json.dumps(required_fields)
+
+        return await super().get_authorization_url(
+            redirect_uri,
+            state,
+            scope,
+            code_challenge,
+            code_challenge_method,
+            extras_params,
+        )
--- a/7project/src/backend/app/oauth/private_key.key
+++ b/7project/src/backend/app/oauth/private_key.key
@@ -0,0 +1,28 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDcr/oxgV074ETd
+DkP/0l8LFnRofru+m2wNNG/ttVCioTqwnvR4oYxwq3U9qIBsT0D+Rx/Ef7qcpzqf
+/w9xt6Hosdv6I5jMHGaVQqLiPuV26/a7WvcmU+PpYuEBmbBHjGVJRBwgPtlUW1VL
+M8Pht9YiaagEKvFa6SUidZLfPv+ECohqgH4mgMrEcG/BTnry0/5xQdadRC9o25cl
+NtZIesS5GPeelhggFTkbh/FaxvMXhIAaRXT61cnxgxtfM71h5ObX5Lwle9z5a+Tw
+xgQhSQq1jbHALYvTwsc4Q/NQGXpGNWy599sb7dg5AkPFSSF4ceXBo/2jOaZCqWrt
+FVONZ+blAgMBAAECggEBAJwQbrRXsaFIRiq1jez5znC+3m+PQCHZM55a+NR3pqB7
+uE9y+ZvdUr3S4sRJxxfRLDsl/Rcu5L8nm9PNwhQ/MmamcNQCHGoro3fmed3ZcNia
+og94ktMt/DztygUhtIHEjVQ0sFc1WufG9xiJcPrM0MfhRAo+fBQ4UCSAVO8/U98B
+a4yukrPNeEA03hyjLB9W41pNQfyOtAHqzwDg9Q5XVaGMCLZT1bjCIquUcht5iMva
+tiw3cwdiYIklLTzTCsPPK9A/AlWZyUXL8KxtN0mU0kkwlXqASoXZ2nqdkhjRye/V
+3JXOmlDtDaJCqWDpH2gHLxMCl7OjfPvuD66bAT3H63kCgYEA5zxW/l6oI3gwYW7+
+j6rEjA2n8LikVnyW2e/PZ7pxBH3iBFe2DHx/imeqd/0IzixcM1zZT/V+PTFPQizG
+lOU7stN6Zg/LuRdxneHPyLWCimJP7BBJCWyJkuxKy9psokyBhGSLR/phL3fP7UkB
+o2I3vGmTFu5A0FzXcNH/cXPMdy8CgYEA9FJw3kyzXlInhJ6Cd63mckLPLYDArUsm
+THBoeH2CVTBS5g0bCbl7N1ZxUoYwZPD4lg5V0nWhZALGf+85ULSjX03PMf1cc6WW
+EIbZIo9hX+mGRa/FudDd+TlbtBnn0jucwABuLQi9mIepE55Hu9tw5/FT3cHeZVQc
+cC0T6ulVvisCgYBCzFeFG+sOdAXl356B+h7VJozBKVWv9kXNp00O9fj4BzVnc78P
+VFezr8a66snEZWQtIkFUq+JP4xK2VyD2mlHoktbk7OM5EOCtbzILFQQk3cmgtAOl
+SUlkvAXPZcXEDL3NdQ4XOOkiQUY7kb97Z0AamZT4JtNqXaeO29si9wS12QKBgHYg
+Hd3864Qg6GZgVOgUNiTsVErFw2KFwQCYIIqQ9CDH+myrzXTILuC0dJnXszI6p5W1
+XJ0irmMyTFKykN2KWKrNbe3Xd4mad5GKARWKiSPcPkUXFNwgNhI3PzU2iTTGCaVz
+D9HKNhC3FnIbxsb29AHQViITh7kqD43U3ZpoMkJ9AoGAZ+sg+CPfuo3ZMpbcdb3B
+ZX2UhAvNKxgHvNnHOjO+pvaM7HiH+BT0650brfBWQ0nTG1dt18mCevVk1UM/5hO9
+AtZw06vCLOJ3p3qpgkSlRZ1H7VokG9M8Od0zXqtJrmeLeBq7dfuDisYOuA+NUEbJ
+UM/UHByieS6ywetruz0LpM0=
+-----END RSA PRIVATE KEY-----
--- a/7project/src/backend/app/oauth/public_key.pem
+++ b/7project/src/backend/app/oauth/public_key.pem
@@ -0,0 +1,31 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
--- a/7project/src/backend/app/schemas/init.py
+++ b/7project/src/backend/app/schemas/init.py
--- a/7project/src/backend/app/schemas/category.py
+++ b/7project/src/backend/app/schemas/category.py
@@ -0,0 +1,21 @@
+from typing import Optional
+from pydantic import BaseModel, ConfigDict
+
+
+class CategoryBase(BaseModel):
+    name: str
+    description: Optional[str] = None
+
+
+class CategoryCreate(CategoryBase):
+    pass
+
+
+class CategoryUpdate(BaseModel):
+    name: Optional[str] = None
+    description: Optional[str] = None
+
+
+class CategoryRead(CategoryBase):
+    id: int
+    model_config = ConfigDict(from_attributes=True)
--- a/7project/src/backend/app/schemas/transaction.py
+++ b/7project/src/backend/app/schemas/transaction.py
@@ -0,0 +1,26 @@
+from typing import List, Optional, Union
+from datetime import date
+from pydantic import BaseModel, Field, ConfigDict
+
+
+class TransactionBase(BaseModel):
+    amount: float = Field(..., gt=-1e18, lt=1e18)
+    description: Optional[str] = None
+    # accept either ISO date string or date object
+    date: Optional[Union[date, str]] = None
+
+class TransactionCreate(TransactionBase):
+    category_ids: Optional[List[int]] = None
+
+class TransactionUpdate(BaseModel):
+    amount: Optional[float] = Field(None, gt=-1e18, lt=1e18)
+    description: Optional[str] = None
+    # accept either ISO date string or date object
+    date: Optional[Union[date, str]] = None
+    category_ids: Optional[List[int]] = None
+
+class TransactionRead(TransactionBase):
+    id: int
+    category_ids: List[int] = []
+    date: Optional[Union[date, str]]
+    model_config = ConfigDict(from_attributes=True)
--- a/7project/src/backend/app/schemas/user.py
+++ b/7project/src/backend/app/schemas/user.py
@@ -0,0 +1,17 @@
+import uuid
+from typing import Optional, Dict, Any
+from fastapi_users import schemas
+
+class UserRead(schemas.BaseUser[uuid.UUID]):
+    first_name: Optional[str] = None
+    last_name: Optional[str] = None
+    config: Optional[Dict[str, Any]] = None
+
+class UserCreate(schemas.BaseUserCreate):
+    first_name: Optional[str] = None
+    last_name: Optional[str] = None
+
+class UserUpdate(schemas.BaseUserUpdate):
+    first_name: Optional[str] = None
+    last_name: Optional[str] = None
+
--- a/7project/src/backend/app/services/init.py
+++ b/7project/src/backend/app/services/init.py
--- a/7project/src/backend/app/services/bank_scraper.py
+++ b/7project/src/backend/app/services/bank_scraper.py
@@ -0,0 +1,178 @@
+import json
+import logging
+import os
+from os.path import dirname, join
+from time import strptime
+from uuid import UUID
+
+import httpx
+from sqlalchemy import select
+
+from app.core.db import sync_session_maker
+from app.models.transaction import Transaction
+from app.models.user import User
+
+logger = logging.getLogger(__name__)
+
+OAUTH_DIR = join(dirname(__file__), "..", "oauth")
+CERTS = (
+    join(OAUTH_DIR, "public_key.pem"),
+    join(OAUTH_DIR, "private_key.key"),
+)
+
+
+def load_mock_bank_transactions(user_id: str) -> None:
+    try:
+        uid = UUID(str(user_id))
+    except Exception:
+        logger.error("Invalid user_id provided to bank_scraper (sync): %r", user_id)
+        return
+
+    _load_mock_bank_transactions(uid)
+
+
+def load_all_mock_bank_transactions() -> None:
+    with sync_session_maker() as session:
+        users = session.execute(select(User)).unique().scalars().all()
+        logger.info("[BankScraper] Starting Mock Bank scrape for all users | count=%d", len(users))
+
+    processed = 0
+    for user in users:
+        try:
+            _load_mock_bank_transactions(user.id)
+            processed += 1
+        except Exception:
+            logger.exception("[BankScraper] Error scraping for user id=%s email=%s", user.id,
+                             getattr(user, 'email', None))
+    logger.info("[BankScraper] Finished Mock Bank scrape for all users | processed=%d", processed)
+
+
+def _load_mock_bank_transactions(user_id: UUID) -> None:
+    with sync_session_maker() as session:
+        user: User | None = session.execute(select(User).where(User.id == user_id)).unique().scalar_one_or_none()
+        if user is None:
+            logger.warning("User not found for id=%s", user_id)
+            return
+
+        transactions = []
+        with httpx.Client() as client:
+            response = client.get(f"{os.getenv('APP_POD_URL')}/mock-bank/scrape")
+            if response.status_code != httpx.codes.OK:
+                return
+            for transaction in response.json():
+                transactions.append(
+                    Transaction(
+                        amount=transaction["amount"],
+                        description=transaction.get("description"),
+                        date=strptime(transaction["date"], "%Y-%m-%d"),
+                        user_id=user_id,
+                    )
+                )
+
+        for transaction in transactions:
+            session.add(transaction)
+        session.commit()
+
+
+def load_ceska_sporitelna_transactions(user_id: str) -> None:
+    try:
+        uid = UUID(str(user_id))
+    except Exception:
+        logger.error("Invalid user_id provided to bank_scraper (sync): %r", user_id)
+        return
+
+    _load_ceska_sporitelna_transactions(uid)
+
+
+def load_all_ceska_sporitelna_transactions() -> None:
+    with sync_session_maker() as session:
+        users = session.execute(select(User)).unique().scalars().all()
+        logger.info("[BankScraper] Starting CSAS scrape for all users | count=%d", len(users))
+
+    processed = 0
+    for user in users:
+        try:
+            _load_ceska_sporitelna_transactions(user.id)
+            processed += 1
+        except Exception:
+            logger.exception("[BankScraper] Error scraping for user id=%s email=%s", user.id,
+                             getattr(user, 'email', None))
+    logger.info("[BankScraper] Finished CSAS scrape for all users | processed=%d", processed)
+
+
+def _load_ceska_sporitelna_transactions(user_id: UUID) -> None:
+    with sync_session_maker() as session:
+        user: User | None = session.execute(select(User).where(User.id == user_id)).unique().scalar_one_or_none()
+        if user is None:
+            logger.warning("User not found for id=%s", user_id)
+            return
+
+        cfg = user.config or {}
+        if "csas" not in cfg:
+            return
+
+        cfg = json.loads(cfg["csas"])
+        if "access_token" not in cfg:
+            return
+
+        accounts = []
+        try:
+            with httpx.Client(cert=CERTS, timeout=httpx.Timeout(20.0)) as client:
+                response = client.get(
+                    "https://webapi.developers.erstegroup.com/api/csas/sandbox/v4/account-information/my/accounts?size=10&page=0&sort=iban&order=desc",
+                    headers={
+                        "Authorization": f"Bearer {cfg['access_token']}",
+                        "WEB-API-key": "09fdc637-3c57-4242-95f2-c2205a2438f3",
+                        "user-involved": "false",
+                    },
+                )
+                if response.status_code != httpx.codes.OK:
+                    return
+
+                for account in response.json().get("accounts", []):
+                    accounts.append(account)
+
+        except (httpx.HTTPError,) as e:
+            logger.exception("[BankScraper] HTTP error during CSAS request | user_id=%s", user_id)
+            return
+
+        for account in accounts:
+            acc_id = account.get("id")
+            if not acc_id:
+                continue
+
+            url = f"https://webapi.developers.erstegroup.com/api/csas/sandbox/v4/account-information/my/accounts/{acc_id}/transactions?size=100&page=0&sort=bookingdate&order=desc"
+            with httpx.Client(cert=CERTS) as client:
+                response = client.get(
+                    url,
+                    headers={
+                        "Authorization": f"Bearer {cfg['access_token']}",
+                        "WEB-API-key": "09fdc637-3c57-4242-95f2-c2205a2438f3",
+                        "user-involved": "false",
+                    },
+                )
+                if response.status_code != httpx.codes.OK:
+                    continue
+
+                transactions = response.json().get("transactions", [])
+
+            for transaction in transactions:
+                description = transaction.get("entryDetails", {}).get("transactionDetails", {}).get(
+                    "additionalRemittanceInformation")
+                date_str = transaction.get("bookingDate", {}).get("date")
+                date = strptime(date_str, "%Y-%m-%d") if date_str else None
+                amount = transaction.get("amount", {}).get("value")
+                if transaction.get("creditDebitIndicator") == "DBIT" and amount is not None:
+                    amount = -abs(amount)
+
+                if amount is None:
+                    continue
+
+                obj = Transaction(
+                    amount=amount,
+                    description=description,
+                    date=date,
+                    user_id=user_id,
+                )
+                session.add(obj)
+            session.commit()
--- a/7project/src/backend/app/services/db.py
+++ b/7project/src/backend/app/services/db.py
@@ -0,0 +1,16 @@
+from typing import AsyncGenerator
+from fastapi import Depends
+from sqlalchemy.ext.asyncio import AsyncSession
+from fastapi_users.db import SQLAlchemyUserDatabase
+
+from ..core.db import async_session_maker
+from ..models.user import User, OAuthAccount
+
+
+async def get_async_session() -> AsyncGenerator[AsyncSession, None]:
+    async with async_session_maker() as session:
+        yield session
+
+
+async def get_user_db(session: AsyncSession = Depends(get_async_session)):
+    yield SQLAlchemyUserDatabase(session, User, OAuthAccount)
--- a/7project/src/backend/app/services/prometheus.py
+++ b/7project/src/backend/app/services/prometheus.py
@@ -0,0 +1,48 @@
+from typing import Callable
+from prometheus_fastapi_instrumentator.metrics import Info
+from prometheus_client import Gauge
+from sqlalchemy import select, func
+
+from app.core.db import async_session_maker
+from app.models.transaction import Transaction
+from app.models.user import User
+
+
+def number_of_users() -> Callable[[Info], None]:
+    METRIC = Gauge(
+        "number_of_users_total",
+        "Number of registered users.",
+        labelnames=("users",)
+    )
+
+    async def instrumentation(info: Info) -> None:
+        try:
+            async with async_session_maker() as session:
+                result = await session.execute(select(func.count(User.id)))
+                user_count = result.scalar_one() or 0
+        except Exception:
+            # In case of DB errors, avoid crashing metrics endpoint
+            user_count = 0
+        METRIC.labels(users="total").set(user_count)
+
+    return instrumentation
+
+
+def number_of_transactions() -> Callable[[Info], None]:
+    METRIC = Gauge(
+        "number_of_transactions_total",
+        "Number of transactions stored.",
+        labelnames=("transactions",)
+    )
+
+    async def instrumentation(info: Info) -> None:
+        try:
+            async with async_session_maker() as session:
+                result = await session.execute(select(func.count()).select_from(Transaction))
+                transaction_count = result.scalar_one() or 0
+        except Exception:
+            # In case of DB errors, avoid crashing metrics endpoint
+            transaction_count = 0
+        METRIC.labels(transactions="total").set(transaction_count)
+
+    return instrumentation
--- a/7project/src/backend/app/services/user_service.py
+++ b/7project/src/backend/app/services/user_service.py
@@ -0,0 +1,117 @@
+import os
+import uuid
+from typing import Optional
+
+from fastapi import Depends, Request
+from fastapi_users import BaseUserManager, FastAPIUsers, UUIDIDMixin, models
+from fastapi_users.authentication import (
+    AuthenticationBackend,
+    BearerTransport,
+)
+from fastapi_users.authentication.strategy.jwt import JWTStrategy
+from fastapi_users.db import SQLAlchemyUserDatabase
+from httpx_oauth.oauth2 import BaseOAuth2
+
+from app.models.user import User
+from app.oauth.bank_id import BankID
+from app.oauth.csas import CSASOAuth
+from app.oauth.custom_openid import CustomOpenID
+from app.oauth.moje_id import MojeIDOAuth
+from app.services.db import get_user_db
+from app.core.queue import enqueue_email
+
+SECRET = os.getenv("SECRET", "CHANGE_ME_SECRET")
+
+FRONTEND_URL = os.getenv("FRONTEND_URL", "http://localhost:5173")
+BACKEND_URL = os.getenv("BACKEND_URL", "http://localhost:8000")
+
+providers = {
+    "MojeID": MojeIDOAuth(
+        os.getenv("MOJEID_CLIENT_ID", "CHANGE_ME_CLIENT_ID"),
+        os.getenv("MOJEID_CLIENT_SECRET", "CHANGE_ME_CLIENT_SECRET"),
+    ),
+    "BankID": BankID(
+        os.getenv("BANKID_CLIENT_ID", "CHANGE_ME_CLIENT_ID"),
+        os.getenv("BANKID_CLIENT_SECRET", "CHANGE_ME_CLIENT_SECRET"),
+    ),
+}
+
+
+def get_oauth_provider(name: str) -> Optional[BaseOAuth2]:
+    if name not in providers:
+        return None
+    return providers[name]
+
+
+class UserManager(UUIDIDMixin, BaseUserManager[User, uuid.UUID]):
+    reset_password_token_secret = SECRET
+    verification_token_secret = SECRET
+
+    async def oauth_callback(self: "BaseUserManager[models.UOAP, models.ID]", oauth_name: str, access_token: str,
+                             account_id: str, account_email: str, expires_at: Optional[int] = None,
+                             refresh_token: Optional[str] = None, request: Optional[Request] = None, *,
+                             associate_by_email: bool = False, is_verified_by_default: bool = False) -> models.UOAP:
+
+        user = await super().oauth_callback(oauth_name, access_token, account_id, account_email, expires_at,
+                                            refresh_token, request, associate_by_email=associate_by_email,
+                                            is_verified_by_default=is_verified_by_default)
+
+        # set additional user info from the OAuth provider
+        provider = get_oauth_provider(oauth_name)
+        if provider is not None and isinstance(provider, CustomOpenID):
+            update_dict = await provider.get_user_info(access_token)
+            await self.user_db.update(user, update_dict)
+
+        return user
+
+    async def on_after_register(self, user: User, request: Optional[Request] = None):
+        await self.request_verify(user, request)
+
+    async def on_after_forgot_password(
+            self, user: User, token: str, request: Optional[Request] = None
+    ):
+        print(f"User {user.id} has forgot their password. Reset token: {token}")
+
+    async def on_after_request_verify(
+            self, user: User, token: str, request: Optional[Request] = None
+    ):
+        verify_frontend_link = f"{FRONTEND_URL}/verify?token={token}"
+        verify_backend_link = f"{BACKEND_URL}/auth/verify?token={token}"
+        subject = "Ověření účtu"
+        body = (
+            "Ahoj,\n\n"
+            "děkujeme za registraci. Prosíme, ověř svůj účet kliknutím na tento odkaz:\n"
+            f"{verify_frontend_link}\n\n"
+            "Pokud by odkaz nefungoval, můžeš použít i přímý odkaz na backend:\n"
+            f"{verify_backend_link}\n\n"
+            "Pokud jsi registraci neprováděl(a), tento email ignoruj.\n"
+        )
+        try:
+            enqueue_email(to=user.email, subject=subject, body=body)
+        except Exception as e:
+            print("[Email Fallback] To:", user.email)
+            print("[Email Fallback] Subject:", subject)
+            print("[Email Fallback] Body:\n", body)
+
+
+async def get_user_manager(user_db: SQLAlchemyUserDatabase = Depends(get_user_db)):
+    yield UserManager(user_db)
+
+
+bearer_transport = BearerTransport(tokenUrl="auth/jwt/login")
+
+
+def get_jwt_strategy() -> JWTStrategy:
+    return JWTStrategy(secret=SECRET, lifetime_seconds=604800)
+
+
+auth_backend = AuthenticationBackend(
+    name="jwt",
+    transport=bearer_transport,
+    get_strategy=get_jwt_strategy,
+)
+
+fastapi_users = FastAPIUsers[User, uuid.UUID](get_user_manager, [auth_backend])
+
+current_active_user = fastapi_users.current_user(active=True)
+current_active_verified_user = fastapi_users.current_user(active=True, verified=True)
--- a/7project/src/backend/app/workers/init.py
+++ b/7project/src/backend/app/workers/init.py
--- a/7project/src/backend/app/workers/celery_tasks.py
+++ b/7project/src/backend/app/workers/celery_tasks.py
@@ -0,0 +1,86 @@
+import logging
+import os
+import smtplib
+from email.message import EmailMessage
+
+import app.services.bank_scraper
+from app.celery_app import celery_app
+
+logger = logging.getLogger("celery_tasks")
+if not logger.handlers:
+    _h = logging.StreamHandler()
+    logger.addHandler(_h)
+logger.setLevel(logging.INFO)
+
+
+@celery_app.task(name="workers.send_email")
+def send_email(to: str, subject: str, body: str) -> None:
+    if not (to and subject and body):
+        logger.error("Email task missing fields. to=%r subject=%r body_len=%r", to, subject, len(body) if body else 0)
+        return
+
+    host = os.getenv("SMTP_HOST")
+    if not host:
+        logger.error("SMTP_HOST is not configured; cannot send email")
+        return
+
+    # Configuration
+    port = int(os.getenv("SMTP_PORT", "25"))
+    username = os.getenv("SMTP_USERNAME")
+    password = os.getenv("SMTP_PASSWORD")
+    use_tls = os.getenv("SMTP_USE_TLS", "0").lower() in {"1", "true", "yes"}
+    use_ssl = os.getenv("SMTP_USE_SSL", "0").lower() in {"1", "true", "yes"}
+    timeout = int(os.getenv("SMTP_TIMEOUT", "10"))
+    mail_from = os.getenv("SMTP_FROM") or username or "noreply@localhost"
+
+    # Build message
+    msg = EmailMessage()
+    msg["To"] = to
+    msg["From"] = mail_from
+    msg["Subject"] = subject
+    msg.set_content(body)
+
+    try:
+        if use_ssl:
+            with smtplib.SMTP_SSL(host=host, port=port, timeout=timeout) as smtp:
+                if username and password:
+                    smtp.login(username, password)
+                smtp.send_message(msg)
+        else:
+            with smtplib.SMTP(host=host, port=port, timeout=timeout) as smtp:
+                # STARTTLS if requested
+                if use_tls:
+                    smtp.starttls()
+                if username and password:
+                    smtp.login(username, password)
+                smtp.send_message(msg)
+        logger.info("[Celery] Email sent | to=%s | subject=%s | body_len=%d", to, subject, len(body))
+    except Exception:
+        logger.exception("Failed to send email via SMTP to=%s subject=%s host=%s port=%s tls=%s ssl=%s", to, subject,
+                         host, port, use_tls, use_ssl)
+
+
+@celery_app.task(name="workers.load_transactions")
+def load_transactions(user_id: str) -> None:
+    if not user_id:
+        logger.error("Load transactions task missing user_id.")
+        return
+
+    logger.info("[Celery] Starting load_transactions | user_id=%s", user_id)
+    try:
+        # Use synchronous bank scraper functions directly, mirroring load_all_transactions
+        app.services.bank_scraper.load_mock_bank_transactions(user_id)
+        app.services.bank_scraper.load_ceska_sporitelna_transactions(user_id)
+    except Exception:
+        logger.exception("Failed to load transactions for user_id=%s", user_id)
+    else:
+        logger.info("[Celery] Finished load_transactions | user_id=%s", user_id)
+
+
+@celery_app.task(name="workers.load_all_transactions")
+def load_all_transactions() -> None:
+    logger.info("[Celery] Starting load_all_transactions")
+    # Now use synchronous bank scraper functions directly
+    app.services.bank_scraper.load_all_mock_bank_transactions()
+    app.services.bank_scraper.load_all_ceska_sporitelna_transactions()
+    logger.info("[Celery] Finished load_all_transactions")
--- a/7project/src/backend/docker-compose.test.yml
+++ b/7project/src/backend/docker-compose.test.yml
@@ -0,0 +1,20 @@
+version: "3.9"
+services:
+  mariadb:
+    image: mariadb:11.4
+    container_name: test-mariadb
+    environment:
+      MARIADB_ROOT_PASSWORD: rootpw
+      MARIADB_DATABASE: group_project
+      MARIADB_USER: appuser
+      MARIADB_PASSWORD: apppass
+    ports:
+      - "3307:3306"  # host:container (use 3307 on host to avoid conflicts)
+    healthcheck:
+      test: ["CMD", "mariadb-admin", "ping", "-h", "127.0.0.1", "-u", "root", "-prootpw", "--silent"]
+      interval: 5s
+      timeout: 2s
+      retries: 20
+    # Truly ephemeral, fast storage (removed when container stops)
+    tmpfs:
+      - /var/lib/mysql
--- a/7project/src/backend/main.py
+++ b/7project/src/backend/main.py
@@ -0,0 +1,4 @@
+import uvicorn
+
+if __name__ == "__main__":
+    uvicorn.run("app.app:app", host="0.0.0.0", log_level="info")
--- a/7project/src/backend/pyproject.toml
+++ b/7project/src/backend/pyproject.toml
@@ -0,0 +1,5 @@
+[tool.pytest.ini_options]
+pythonpath = "."
+asyncio_mode = "auto"
+asyncio_default_fixture_loop_scope = "session"
+asyncio_default_test_loop_scope = "session"
--- a/7project/src/backend/requirements.txt
+++ b/7project/src/backend/requirements.txt
@@ -0,0 +1,73 @@
+aio-pika==9.5.6
+aiormq==6.8.1
+aiosqlite==0.21.0
+alembic==1.16.5
+amqp==5.3.1
+annotated-types==0.7.0
+anyio==4.11.0
+argon2-cffi==23.1.0
+argon2-cffi-bindings==25.1.0
+asyncmy==0.2.9
+bcrypt==4.3.0
+billiard==4.2.2
+celery==5.5.3
+certifi==2025.10.5
+cffi==2.0.0
+click==8.1.8
+click-didyoumean==0.3.1
+click-plugins==1.1.1.2
+click-repl==0.3.0
+cryptography==46.0.1
+dnspython==2.7.0
+email_validator==2.2.0
+exceptiongroup==1.3.0
+fastapi==0.117.1
+fastapi-users==14.0.1
+fastapi-users-db-sqlalchemy==7.0.0
+greenlet==3.2.4
+h11==0.16.0
+httpcore==1.0.9
+httptools==0.6.4
+httpx==0.28.1
+httpx-oauth==0.16.1
+idna==3.10
+kombu==5.5.4
+makefun==1.16.0
+Mako==1.3.10
+MarkupSafe==3.0.2
+multidict==6.6.4
+packaging==25.0
+pamqp==3.3.0
+prometheus-fastapi-instrumentator==7.1.0
+prometheus_client==0.23.1
+prompt_toolkit==3.0.52
+propcache==0.3.2
+pwdlib==0.2.1
+pycparser==2.23
+pydantic==2.11.9
+pydantic_core==2.33.2
+PyJWT==2.10.1
+PyMySQL==1.1.2
+python-dateutil==2.9.0.post0
+python-dotenv==1.1.1
+python-multipart==0.0.20
+PyYAML==6.0.2
+sentry-sdk==2.42.0
+six==1.17.0
+sniffio==1.3.1
+SQLAlchemy==2.0.43
+SQLAlchemy-Utils==0.42.0
+starlette==0.48.0
+tomli==2.2.1
+typing-inspection==0.4.1
+typing_extensions==4.15.0
+tzdata==2025.2
+urllib3==2.5.0
+uvicorn==0.37.0
+uvloop==0.21.0
+vine==5.1.0
+watchfiles==1.1.0
+wcwidth==0.2.14
+websockets==15.0.1
+yarl==1.20.1
+python-json-logger==2.0.7
--- a/7project/src/backend/test_locally.sh
+++ b/7project/src/backend/test_locally.sh
@@ -0,0 +1,113 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Run tests against a disposable local MariaDB on host port 3307 using Docker Compose.
+# Requirements: Docker, docker compose plugin, Python, Alembic, pytest.
+# Usage:
+#   chmod +x ./test_locally.sh
+#   # From 7project/backend directory
+#   ./test_locally.sh [--only-unit|--only-integration|--only-e2e] [pytest-args...]
+#   # Examples:
+#   ./test_locally.sh --only-unit -q
+#   ./test_locally.sh --only-integration -k "login"
+#   ./test_locally.sh --only-e2e -vv
+#
+# This script will:
+# 1) Start a MariaDB 11.4 container (ephemeral storage, port 3307)
+# 2) Wait until it's healthy
+# 3) Export env vars expected by the app (DATABASE_URL etc.)
+# 4) Run Alembic migrations
+# 5) Run pytest
+# 6) Tear everything down (containers and tmpfs data)
+
+COMPOSE_FILE="docker-compose.test.yml"
+SERVICE_NAME="mariadb"
+CONTAINER_NAME="test-mariadb"
+
+if ! command -v docker >/dev/null 2>&1; then
+  echo "Docker is required but not found in PATH" >&2
+  exit 1
+fi
+if ! docker compose version >/dev/null 2>&1; then
+  echo "Docker Compose V2 plugin is required (docker compose)" >&2
+  exit 1
+fi
+
+# Bring up the DB
+echo "Starting MariaDB (port 3307) with docker compose..."
+docker compose -f "$COMPOSE_FILE" up -d
+
+# Ensure we clean up on exit
+cleanup() {
+  echo "\nTearing down docker compose stack..."
+  docker compose -f "$COMPOSE_FILE" down -v || true
+}
+trap cleanup EXIT
+
+# Wait for healthy container
+echo -n "Waiting for MariaDB to become healthy"
+for i in {1..60}; do
+  status=$(docker inspect -f '{{.State.Health.Status}}' "$CONTAINER_NAME" 2>/dev/null || echo "")
+  if [ "$status" = "healthy" ]; then
+    echo " -> healthy"
+    break
+  fi
+  echo -n "."
+  sleep 1
+  if [ $i -eq 60 ]; then
+    echo "\nMariaDB did not become healthy in time" >&2
+    exit 1
+  fi
+done
+
+# Export env vars for the app/tests (match app/core/db.py expectations)
+export MARIADB_HOST=127.0.0.1
+export MARIADB_PORT=3307
+export MARIADB_DB=group_project
+export MARIADB_USER=appuser
+export MARIADB_PASSWORD=apppass
+export DATABASE_URL="mysql+asyncmy://$MARIADB_USER:$MARIADB_PASSWORD@$MARIADB_HOST:$MARIADB_PORT/$MARIADB_DB"
+export PYTEST_RUN_CONFIG="True"
+
+# Determine which tests to run based on flags
+UNIT_TESTS="tests/test_unit_user_service.py"
+INTEGRATION_TESTS="tests/test_integration_app.py"
+E2E_TESTS="tests/test_e2e.py"
+
+FLAG_COUNT=0
+TEST_TARGET=""
+declare -a PYTEST_ARGS=()
+for arg in "$@"; do
+  case "$arg" in
+    --only-unit)
+      TEST_TARGET="$UNIT_TESTS"; FLAG_COUNT=$((FLAG_COUNT+1));;
+    --only-integration)
+      TEST_TARGET="$INTEGRATION_TESTS"; FLAG_COUNT=$((FLAG_COUNT+1));;
+    --only-e2e)
+      TEST_TARGET="$E2E_TESTS"; FLAG_COUNT=$((FLAG_COUNT+1));;
+    *)
+      PYTEST_ARGS+=("$arg");;
+  esac
+done
+
+if [ "$FLAG_COUNT" -gt 1 ]; then
+  echo "Error: Use only one of --only-unit, --only-integration, or --only-e2e" >&2
+  exit 2
+fi
+
+# Run Alembic migrations then tests
+pushd . >/dev/null
+  echo "Running Alembic migrations..."
+  alembic upgrade head
+
+  echo "Running pytest..."
+  if [ -n "$TEST_TARGET" ]; then
+    # Use "${PYTEST_ARGS[@]:-}" to safely expand empty array with 'set -u'
+    pytest "$TEST_TARGET" "${PYTEST_ARGS[@]:-}"
+  else
+    # Use "${PYTEST_ARGS[@]:-}" to safely expand empty array with 'set -u'
+    pytest "${PYTEST_ARGS[@]:-}"
+  fi
+popd >/dev/null
+
+# Cleanup handled by trap
--- a/7project/src/backend/tests/conftest.py
+++ b/7project/src/backend/tests/conftest.py
@@ -0,0 +1,44 @@
+import sys
+import uuid
+import types
+import pytest
+from fastapi.testclient import TestClient
+from httpx import AsyncClient, ASGITransport
+
+# Stub sentry_sdk to avoid optional dependency issues during import of app
+stub = types.ModuleType("sentry_sdk")
+stub.init = lambda *args, **kwargs: None
+sys.modules.setdefault("sentry_sdk", stub)
+
+# Import the FastAPI application
+from app.app import fastApi as app  # noqa: E402
+
+
+@pytest.fixture(scope="session")
+def fastapi_app():
+    return app
+
+
+@pytest.fixture(scope="session")
+def client(fastapi_app):
+    return TestClient(fastapi_app, raise_server_exceptions=True)
+
+
+@pytest.fixture(scope="function")
+async def test_user(fastapi_app):
+    """
+    Creates a new user asynchronously and returns their credentials.
+    Does NOT log them in.
+    Using AsyncClient with ASGITransport avoids event loop conflicts with DB connections.
+    """
+    unique_email = f"testuser_{uuid.uuid4()}@example.com"
+    password = "a_strong_password"
+    user_payload = {"email": unique_email, "password": password}
+
+    transport = ASGITransport(app=fastapi_app, raise_app_exceptions=True)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        response = await ac.post("/auth/register", json=user_payload)
+        assert response.status_code == 201
+
+    return {"username": unique_email, "password": password}
+
--- a/7project/src/backend/tests/test_e2e.py
+++ b/7project/src/backend/tests/test_e2e.py
@@ -0,0 +1,210 @@
+import pytest
+import uuid
+from httpx import AsyncClient, ASGITransport
+from fastapi import status
+
+
+def test_e2e(client):
+    # 1) Service is alive
+    alive = client.get("/")
+    assert alive.status_code == status.HTTP_200_OK
+
+    # 2) Attempt to login without payload should fail fast (validation error)
+    login = client.post("/auth/jwt/login")
+    assert login.status_code in (status.HTTP_400_BAD_REQUEST, status.HTTP_422_UNPROCESSABLE_CONTENT)
+
+    # 3) Protected endpoint should not be accessible without token
+    me = client.get("/users/me")
+    assert me.status_code in (status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN)
+
+
+@pytest.mark.asyncio
+async def test_e2e_full_user_lifecycle(fastapi_app, test_user):
+    # Use an AsyncClient with ASGITransport for async tests
+    transport = ASGITransport(app=fastapi_app, raise_app_exceptions=True)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        login_payload = test_user
+
+        # 1. Log in with the new credentials
+        login_resp = await ac.post("/auth/jwt/login", data=login_payload)
+        assert login_resp.status_code == status.HTTP_200_OK
+        token = login_resp.json()["access_token"]
+        headers = {"Authorization": f"Bearer {token}"}
+
+        # 2. Access a protected endpoint
+        me_resp = await ac.get("/users/me", headers=headers)
+        assert me_resp.status_code == status.HTTP_200_OK
+        assert me_resp.json()["email"] == test_user["username"]
+
+        # 3. Update the user's profile
+        update_payload = {"first_name": "Test"}
+        patch_resp = await ac.patch("/users/me", json=update_payload, headers=headers)
+        assert patch_resp.status_code == status.HTTP_200_OK
+        assert patch_resp.json()["first_name"] == "Test"
+
+        # 4. Log out
+        logout_resp = await ac.post("/auth/jwt/logout", headers=headers)
+        assert logout_resp.status_code in (status.HTTP_200_OK, status.HTTP_204_NO_CONTENT)
+
+        # 5. Verify token is invalid
+        me_again_resp = await ac.get("/users/me", headers=headers)
+        assert me_again_resp.status_code == status.HTTP_401_UNAUTHORIZED
+
+
+@pytest.mark.asyncio
+async def test_e2e_transaction_workflow(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app, raise_app_exceptions=True)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        # 1. Log in to get the token
+        login_resp = await ac.post("/auth/jwt/login", data=test_user)
+        token = login_resp.json()["access_token"]
+        headers = {"Authorization": f"Bearer {token}"}
+
+        # NEW STEP: Create a category first to get a valid ID
+        category_payload = {"name": "Test Category for E2E"}
+        create_category_resp = await ac.post("/categories/create", json=category_payload, headers=headers)
+        assert create_category_resp.status_code == status.HTTP_201_CREATED
+        category_id = create_category_resp.json()["id"]
+
+        # 2. Create a new transaction
+        tx_payload = {"amount": -55.40, "description": "Milk and eggs"}
+        tx_resp = await ac.post("/transactions/create", json=tx_payload, headers=headers)
+        assert tx_resp.status_code == status.HTTP_201_CREATED
+        tx_id = tx_resp.json()["id"]
+
+        # 3. Assign the category
+        assign_resp = await ac.post(f"/transactions/{tx_id}/categories/{category_id}", headers=headers)
+        assert assign_resp.status_code == status.HTTP_200_OK
+
+        # 4. Verify assignment
+        get_tx_resp = await ac.get(f"/transactions/{tx_id}", headers=headers)
+        assert category_id in get_tx_resp.json()["category_ids"]
+
+        # 5. Unassign the category
+        unassign_resp = await ac.delete(f"/transactions/{tx_id}/categories/{category_id}", headers=headers)
+        assert unassign_resp.status_code == status.HTTP_200_OK
+
+        # 6. Get the transaction again and verify the category is gone
+        get_tx_again_resp = await ac.get(f"/transactions/{tx_id}", headers=headers)
+        final_tx_data = get_tx_again_resp.json()
+        assert category_id not in final_tx_data["category_ids"]
+
+        # 7. Delete the transaction for cleanup
+        delete_resp = await ac.delete(f"/transactions/{tx_id}/delete", headers=headers)
+        assert delete_resp.status_code in (status.HTTP_200_OK, status.HTTP_204_NO_CONTENT)
+
+        # NEW STEP: Clean up the created category
+        delete_category_resp = await ac.delete(f"/categories/{category_id}", headers=headers)
+        assert delete_category_resp.status_code in (status.HTTP_200_OK, status.HTTP_204_NO_CONTENT)
+
+@pytest.mark.asyncio
+async def test_register_then_login_and_fetch_me(fastapi_app):
+    transport = ASGITransport(app=fastapi_app, raise_app_exceptions=True)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        # Use unique email to avoid duplicates across runs
+        suffix = uuid.uuid4().hex[:8]
+        email = f"newuser_{suffix}@example.com"
+        password = "StrongPassw0rd!"
+
+        reg = await ac.post("/auth/register", json={"email": email, "password": password})
+        assert reg.status_code in (status.HTTP_201_CREATED, status.HTTP_200_OK)
+
+        login = await ac.post("/auth/jwt/login", data={"username": email, "password": password})
+        assert login.status_code == status.HTTP_200_OK
+        token = login.json()["access_token"]
+        headers = {"Authorization": f"Bearer {token}"}
+        try:
+            me = await ac.get("/users/me", headers=headers)
+            assert me.status_code == status.HTTP_200_OK
+            assert me.json()["email"] == email
+        finally:
+            # Cleanup: delete the created user so future runs won’t conflict
+            d = await ac.delete("/users/me", headers=headers)
+            assert d.status_code == status.HTTP_204_NO_CONTENT
+
+
+@pytest.mark.asyncio
+async def test_delete_current_user_revokes_access(fastapi_app):
+    transport = ASGITransport(app=fastapi_app, raise_app_exceptions=True)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        email = "todelete@example.com"
+        password = "Passw0rd!"
+        reg = await ac.post("/auth/register", json={"email": email, "password": password})
+        assert reg.status_code in (status.HTTP_200_OK, status.HTTP_201_CREATED)
+
+        login = await ac.post("/auth/jwt/login", data={"username": email, "password": password})
+        token = login.json()["access_token"]
+        headers = {"Authorization": f"Bearer {token}"}
+
+        # Delete self
+        d = await ac.delete("/users/me", headers=headers)
+        assert d.status_code == status.HTTP_204_NO_CONTENT
+
+        # Access should now fail
+        me = await ac.get("/users/me", headers=headers)
+        assert me.status_code in (status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN)
+
+
+@pytest.mark.asyncio
+async def test_update_category_conflict_and_404(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        token = (await ac.post("/auth/jwt/login", data=test_user)).json()["access_token"]
+        h = {"Authorization": f"Bearer {token}"}
+
+        a = (await ac.post("/categories/create", json={"name": "A"}, headers=h)).json()
+        b = (await ac.post("/categories/create", json={"name": "B"}, headers=h)).json()
+
+        # Attempt to rename A -> B should conflict
+        conflict = await ac.patch(f"/categories/{a['id']}", json={"name": "B"}, headers=h)
+        assert conflict.status_code == status.HTTP_409_CONFLICT
+
+        # Update non-existent
+        missing = await ac.patch("/categories/999999", json={"name": "Z"}, headers=h)
+        assert missing.status_code == status.HTTP_404_NOT_FOUND
+
+@pytest.mark.asyncio
+async def test_category_cross_user_isolation(fastapi_app):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        # Generate unique emails for both users
+        sfx = uuid.uuid4().hex[:8]
+        u1 = {"email": f"u1_{sfx}@example.com", "password": "Aaaaaa1!"}
+        u2 = {"email": f"u2_{sfx}@example.com", "password": "Aaaaaa1!"}
+
+        # user1
+        assert (await ac.post("/auth/register", json=u1)).status_code in (200, 201)
+        t1 = (await ac.post("/auth/jwt/login", data={"username": u1["email"], "password": u1["password"]})).json()["access_token"]
+        h1 = {"Authorization": f"Bearer {t1}"}
+
+        # user1 creates a category
+        c = (await ac.post("/categories/create", json={"name": "Private"}, headers=h1)).json()
+        cat_id = c["id"]
+
+        # user2
+        assert (await ac.post("/auth/register", json=u2)).status_code in (200, 201)
+        t2 = (await ac.post("/auth/jwt/login", data={"username": u2["email"], "password": u2["password"]})).json()["access_token"]
+        h2 = {"Authorization": f"Bearer {t2}"}
+
+        try:
+            # user2 cannot read/delete user1's category
+            g = await ac.get(f"/categories/{cat_id}", headers=h2)
+            assert g.status_code == status.HTTP_404_NOT_FOUND
+            d = await ac.delete(f"/categories/{cat_id}", headers=h2)
+            assert d.status_code == status.HTTP_404_NOT_FOUND
+        finally:
+            # Cleanup: remove the created category as its owner
+            try:
+                _ = await ac.delete(f"/categories/{cat_id}", headers=h1)
+            except Exception:
+                pass
+            # Cleanup: delete both users to avoid email conflicts later
+            try:
+                _ = await ac.delete("/users/me", headers=h1)
+            except Exception:
+                pass
+            try:
+                _ = await ac.delete("/users/me", headers=h2)
+            except Exception:
+                pass
+
--- a/7project/src/backend/tests/test_integration_app.py
+++ b/7project/src/backend/tests/test_integration_app.py
@@ -0,0 +1,159 @@
+from fastapi import status
+import pytest
+from httpx import AsyncClient, ASGITransport
+
+
+@pytest.mark.asyncio
+async def test_create_and_get_category(fastapi_app, test_user):
+    # Use AsyncClient for async tests
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        # 1. Log in to get an auth token
+        login_resp = await ac.post("/auth/jwt/login", data=test_user)
+        token = login_resp.json()["access_token"]
+        headers = {"Authorization": f"Bearer {token}"}
+
+        # 2. Define and create the new category
+        category_name = "Async Integration Test"
+        category_payload = {"name": category_name}
+        create_resp = await ac.post("/categories/create", json=category_payload, headers=headers)
+
+        # 3. Assert creation was successful
+        assert create_resp.status_code == status.HTTP_201_CREATED
+        created_data = create_resp.json()
+        category_id = created_data["id"]
+        assert created_data["name"] == category_name
+
+        # 4. GET the list of categories to verify
+        list_resp = await ac.get("/categories/", headers=headers)
+        assert list_resp.status_code == status.HTTP_200_OK
+
+        # 5. Check that our new category is in the list
+        categories_list = list_resp.json()
+        assert any(cat["name"] == category_name for cat in categories_list)
+
+        delete_resp = await ac.delete(f"/categories/{category_id}", headers=headers)
+        assert delete_resp.status_code in (status.HTTP_200_OK, status.HTTP_204_NO_CONTENT)
+
+
+@pytest.mark.asyncio
+async def test_create_transaction_missing_amount_fails(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        # 1. Log in to get an auth token
+        login_resp = await ac.post("/auth/jwt/login", data=test_user)
+        token = login_resp.json()["access_token"]
+        headers = {"Authorization": f"Bearer {token}"}
+
+        # 2. Define an invalid payload
+        invalid_payload = {"description": "This should fail"}
+
+        # 3. Attempt to create the transaction
+        resp = await ac.post("/transactions/create", json=invalid_payload, headers=headers)
+
+        # 4. Assert the expected validation error
+        assert resp.status_code == status.HTTP_422_UNPROCESSABLE_CONTENT
+
+
+@pytest.mark.asyncio
+async def test_login_invalid_credentials(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        bad = await ac.post("/auth/jwt/login", data={"username": test_user["username"], "password": "nope"})
+        assert bad.status_code in (status.HTTP_401_UNAUTHORIZED, status.HTTP_400_BAD_REQUEST)
+        unknown = await ac.post("/auth/jwt/login", data={"username": "nouser@example.com", "password": "x"})
+        assert unknown.status_code in (status.HTTP_401_UNAUTHORIZED, status.HTTP_400_BAD_REQUEST)
+
+
+@pytest.mark.asyncio
+async def test_category_duplicate_name_conflict(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        token = (await ac.post("/auth/jwt/login", data=test_user)).json()["access_token"]
+        h = {"Authorization": f"Bearer {token}"}
+
+        p = {"name": "Food"}
+        r1 = await ac.post("/categories/create", json=p, headers=h)
+        assert r1.status_code == status.HTTP_201_CREATED
+        r2 = await ac.post("/categories/create", json=p, headers=h)
+        assert r2.status_code == status.HTTP_409_CONFLICT
+
+@pytest.mark.asyncio
+async def test_create_transaction_invalid_date_format(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        token = (await ac.post("/auth/jwt/login", data=test_user)).json()["access_token"]
+        h = {"Authorization": f"Bearer {token}"}
+        bad = await ac.post("/transactions/create", json={"amount": 10, "description": "x", "date": "31-12-2024"}, headers=h)
+        assert bad.status_code == status.HTTP_400_BAD_REQUEST
+
+@pytest.mark.asyncio
+async def test_update_transaction_rejects_duplicate_category_ids(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        token = (await ac.post("/auth/jwt/login", data=test_user)).json()["access_token"]
+        h = {"Authorization": f"Bearer {token}"}
+        tx = (await ac.post("/transactions/create", json={"amount": 5, "description": "x"}, headers=h)).json()
+        dup = await ac.patch(f"/transactions/{tx['id']}/edit", json={"category_ids": [1, 1]}, headers=h)
+        assert dup.status_code == status.HTTP_400_BAD_REQUEST
+
+@pytest.mark.asyncio
+async def test_assign_unassign_category_not_found_cases(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        token = (await ac.post("/auth/jwt/login", data=test_user)).json()["access_token"]
+        h = {"Authorization": f"Bearer {token}"}
+
+        # Create tx and category
+        tx = (await ac.post("/transactions/create", json={"amount": 1, "description": "a"}, headers=h)).json()
+        cat = (await ac.post("/categories/create", json={"name": "X"}, headers=h)).json()
+
+        # Missing transaction
+        r1 = await ac.post(f"/transactions/999999/categories/{cat['id']}", headers=h)
+        assert r1.status_code == status.HTTP_404_NOT_FOUND
+
+        # Missing category
+        r2 = await ac.post(f"/transactions/{tx['id']}/categories/999999", headers=h)
+        assert r2.status_code == status.HTTP_404_NOT_FOUND
+
+@pytest.mark.asyncio
+async def test_transactions_date_filter_and_balance_series(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        token = (await ac.post("/auth/jwt/login", data=test_user)).json()["access_token"]
+        h = {"Authorization": f"Bearer {token}"}
+
+        # Seed transactions spanning days
+        data = [
+            {"amount": 100, "description": "day1", "date": "2024-01-01"},
+            {"amount": -25, "description": "day2", "date": "2024-01-02"},
+            {"amount": 50, "description": "day3", "date": "2024-01-03"},
+        ]
+        for p in data:
+            r = await ac.post("/transactions/create", json=p, headers=h)
+            assert r.status_code == status.HTTP_201_CREATED
+
+        # Filtered list (2nd and 3rd only)
+        lst = await ac.get("/transactions/", params={"start_date": "2024-01-02", "end_date": "2024-01-03"}, headers=h)
+        assert lst.status_code == status.HTTP_200_OK
+        assert len(lst.json()) == 2
+
+        # Balance series should be cumulative per date
+        series = await ac.get("/transactions/balance_series", headers=h)
+        assert series.status_code == status.HTTP_200_OK
+        s = series.json()
+        assert s == [
+            {"date": "2024-01-01", "balance": 100.0},
+            {"date": "2024-01-02", "balance": 75.0},
+            {"date": "2024-01-03", "balance": 125.0},
+        ]
+
+@pytest.mark.asyncio
+async def test_delete_transaction_not_found(fastapi_app, test_user):
+    transport = ASGITransport(app=fastapi_app)
+    async with AsyncClient(transport=transport, base_url="http://testserver") as ac:
+        token = (await ac.post("/auth/jwt/login", data=test_user)).json()["access_token"]
+        h = {"Authorization": f"Bearer {token}"}
+        r = await ac.delete("/transactions/9999999/delete", headers=h)
+        assert r.status_code == status.HTTP_404_NOT_FOUND
+
--- a/7project/src/backend/tests/test_unit_user_service.py
+++ b/7project/src/backend/tests/test_unit_user_service.py
@@ -0,0 +1,62 @@
+import pytest
+from fastapi import status
+from app.services import user_service
+
+
+def test_get_oauth_provider_known_unknown():
+    # Known providers should return a provider instance
+    bankid = user_service.get_oauth_provider("BankID")
+    mojeid = user_service.get_oauth_provider("MojeID")
+    assert bankid is not None
+    assert mojeid is not None
+
+    # Unknown should return None
+    assert user_service.get_oauth_provider("DoesNotExist") is None
+
+
+def test_get_jwt_strategy_lifetime():
+    strategy = user_service.get_jwt_strategy()
+    assert strategy is not None
+    # Basic smoke check: strategy has a lifetime set to 604800
+    assert getattr(strategy, "lifetime_seconds", None) in (604800,)
+
+def test_root_ok(client):
+    resp = client.get("/")
+    assert resp.status_code == status.HTTP_200_OK
+    assert resp.json() == {"status": "ok"}
+
+
+def test_authenticated_route_requires_auth(client):
+    resp = client.get("/authenticated-route")
+    assert resp.status_code in (status.HTTP_401_UNAUTHORIZED, status.HTTP_403_FORBIDDEN)
+
+@pytest.mark.asyncio
+async def test_on_after_request_verify_enqueues_email(monkeypatch):
+    calls = {}
+
+    def fake_enqueue_email(to: str, subject: str, body: str):
+        calls.setdefault("emails", []).append({
+            "to": to,
+            "subject": subject,
+            "body": body,
+        })
+
+    # Patch the enqueue_email used inside user_service
+    monkeypatch.setattr(user_service, "enqueue_email", fake_enqueue_email)
+
+    class DummyUser:
+        def __init__(self, email):
+            self.email = email
+
+    mgr = user_service.UserManager(user_db=None)  # user_db not needed for this method
+    user = DummyUser("test@example.com")
+
+    # Call the hook
+    await mgr.on_after_request_verify(user, token="abc123", request=None)
+
+    # Verify one email has been enqueued with expected content
+    assert len(calls.get("emails", [])) == 1
+    email = calls["emails"][0]
+    assert email["to"] == "test@example.com"
+    assert "ověření účtu" in email["subject"].lower()
+    assert "abc123" in email["body"]