feat: Add shared components, refactor stores, improve data-entry workflow

Shared Components:
- Add CompanySelector.vue and PeriodSelector.vue components
- Add AppHeader.vue and SlideMenu.vue layout components
- Add shared stores factories (companies.js, accountingPeriod.js)
- Add shared routes factories (companies.py, calendar.py)
- Add shared models (company.py, calendar.py)
- Add shared layout styles (header.css, navigation.css)

Data Entry App:
- Update CLAUDE.md with prod/test server documentation
- Improve nomenclature sync service with better error handling
- Update receipts router and CRUD operations
- Add company/period stores using shared factories
- Update App.vue layout with shared components
- Fix OCRUploadZone file handling

Reports App:
- Refactor stores to use shared factories
- Update App.vue to use shared layout components

Infrastructure:
- Replace start-data-entry.sh with separate dev/test scripts
- Add .claude/rules for authentication, backend patterns, etc.
- Add implementation plan for OCR receipt improvements
- Clean up old documentation files

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

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

data-entry-app/backend/migrations/env.py

@@ -1,6 +1,8 @@
 """Alembic environment configuration."""
 
+import os
 from logging.config import fileConfig
+from dotenv import load_dotenv
 
 from sqlalchemy import engine_from_config
 from sqlalchemy import pool
@@ -8,14 +10,22 @@ from sqlalchemy import pool
 from alembic import context
 from sqlmodel import SQLModel
 
+# Load environment variables from .env file
+load_dotenv()
+
 # Import all models to ensure they're registered with SQLModel
 from app.db.models.receipt import Receipt, ReceiptAttachment
 from app.db.models.accounting_entry import AccountingEntry
+from app.db.models.nomenclature import SyncedSupplier, LocalSupplier, SyncedCashRegister
 
 # this is the Alembic Config object, which provides
 # access to the values within the .ini file in use.
 config = context.config
 
+# Override sqlalchemy.url from environment variable if set
+db_path = os.getenv("SQLITE_DATABASE_PATH", "data/receipts.db")
+config.set_main_option("sqlalchemy.url", f"sqlite:///{db_path}")
+
 # Interpret the config file for Python logging.
 # This line sets up loggers basically.
 if config.config_file_name is not None: