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/app/main.py

@@ -132,6 +132,16 @@ from auth.routes import create_auth_router
 auth_router = create_auth_router(prefix="")  # No prefix - we set it in include_router
 app.include_router(auth_router, prefix="/api/auth", tags=["auth"])
 
+# Shared routes (companies, calendar)
+from routes.companies import create_companies_router
+from routes.calendar import create_calendar_router
+
+companies_router = create_companies_router(oracle_pool)  # No cache for data-entry
+calendar_router = create_calendar_router(oracle_pool)
+
+app.include_router(companies_router, prefix="/api/companies", tags=["companies"])
+app.include_router(calendar_router, prefix="/api/calendar", tags=["calendar"])
+
 
 # Root endpoint
 @app.get("/")