feat: add customer profile, VAT alignment, and fix shop auth

Customer Profile:
- Add profile API (GET/PUT /api/v1/shop/profile)
- Add password change endpoint (PUT /api/v1/shop/profile/password)
- Implement full profile page with preferences and password sections
- Add CustomerPasswordChange schema

Shop Authentication Fixes:
- Add Authorization header to all shop account API calls
- Fix orders, order-detail, messages pages authentication
- Add proper redirect to login on 401 responses
- Fix toast message showing noqa comment in shop-layout.js

VAT Calculation:
- Add shared VAT utility (app/utils/vat.py)
- Add VAT fields to Order model (vat_regime, vat_rate, etc.)
- Align order VAT calculation with invoice settings
- Add migration for VAT fields on orders

Validation Framework:
- Fix base_validator.py with missing methods
- Add validate_file, output_results, get_exit_code methods
- Fix validate_all.py import issues

Documentation:
- Add launch-readiness.md tracking OMS status
- Update to 95% feature complete

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

alembic/versions/q5e6f7a8b9c0_add_vat_fields_to_orders.py

@@ -0,0 +1,72 @@
+# alembic/versions/q5e6f7a8b9c0_add_vat_fields_to_orders.py
+"""Add VAT fields to orders table.
+
+Adds vat_regime, vat_rate, vat_rate_label, and vat_destination_country
+to enable proper VAT tracking at order creation time, aligned with
+invoice VAT logic.
+
+Revision ID: q5e6f7a8b9c0
+Revises: p4d5e6f7a8b9
+Create Date: 2026-01-02 10:00:00.000000
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = 'q5e6f7a8b9c0'
+down_revision: Union[str, None] = 'p4d5e6f7a8b9'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    # Add VAT regime (domestic, oss, reverse_charge, origin, exempt)
+    op.add_column(
+        'orders',
+        sa.Column('vat_regime', sa.String(20), nullable=True)
+    )
+
+    # Add VAT rate as percentage (e.g., 17.00 for 17%)
+    op.add_column(
+        'orders',
+        sa.Column('vat_rate', sa.Numeric(5, 2), nullable=True)
+    )
+
+    # Add human-readable VAT label (e.g., "Luxembourg VAT 17%")
+    op.add_column(
+        'orders',
+        sa.Column('vat_rate_label', sa.String(100), nullable=True)
+    )
+
+    # Add destination country for cross-border sales (ISO code)
+    op.add_column(
+        'orders',
+        sa.Column('vat_destination_country', sa.String(2), nullable=True)
+    )
+
+    # Populate VAT fields for existing orders based on shipping country
+    # Default to 'domestic' for LU orders and 'origin' for other EU orders
+    op.execute("""
+        UPDATE orders
+        SET vat_regime = CASE
+            WHEN ship_country_iso = 'LU' THEN 'domestic'
+            WHEN ship_country_iso IN ('AT', 'BE', 'BG', 'HR', 'CY', 'CZ', 'DK', 'EE', 'FI', 'FR', 'DE', 'GR', 'HU', 'IE', 'IT', 'LV', 'LT', 'MT', 'NL', 'PL', 'PT', 'RO', 'SK', 'SI', 'ES', 'SE') THEN 'origin'
+            ELSE 'exempt'
+        END,
+        vat_destination_country = CASE
+            WHEN ship_country_iso != 'LU' AND ship_country_iso IN ('AT', 'BE', 'BG', 'HR', 'CY', 'CZ', 'DK', 'EE', 'FI', 'FR', 'DE', 'GR', 'HU', 'IE', 'IT', 'LV', 'LT', 'MT', 'NL', 'PL', 'PT', 'RO', 'SK', 'SI', 'ES', 'SE') THEN ship_country_iso
+            ELSE NULL
+        END
+        WHERE vat_regime IS NULL
+    """)
+
+
+def downgrade() -> None:
+    op.drop_column('orders', 'vat_destination_country')
+    op.drop_column('orders', 'vat_rate_label')
+    op.drop_column('orders', 'vat_rate')
+    op.drop_column('orders', 'vat_regime')