Add vue-router, login/setup flow and backend logging

Refactor frontend to route-based navigation with vue-router, add
system setup and login pages with API integration. Add structured
logging, access-log middleware and startup lifecycle to FastAPI
backend.

server/src/app/services/employee.py

@@ -1,20 +1,34 @@
 from sqlalchemy.orm import Session
 
+from app.core.logging import get_logger
 from app.models.employee import Employee
 from app.repositories.employee import EmployeeRepository
 from app.schemas.employee import EmployeeCreate
 
+logger = get_logger("app.services.employee")
+
 
 class EmployeeService:
     def __init__(self, db: Session) -> None:
         self.repository = EmployeeRepository(db)
 
     def list_employees(self) -> list[Employee]:
-        return self.repository.list()
+        employees = self.repository.list()
+        logger.info("Listed employees (count=%d)", len(employees))
+        return employees
 
     def get_employee(self, employee_id: str) -> Employee | None:
-        return self.repository.get(employee_id)
+        employee = self.repository.get(employee_id)
+        if employee:
+            logger.info("Fetched employee id=%s name=%s", employee_id, employee.name)
+        else:
+            logger.warning("Employee not found id=%s", employee_id)
+        return employee
 
     def create_employee(self, payload: EmployeeCreate) -> Employee:
         employee = Employee(**payload.model_dump())
-        return self.repository.create(employee)
+        created = self.repository.create(employee)
+        logger.info(
+            "Created employee id=%s no=%s name=%s", created.id, created.employee_no, created.name
+        )
+        return created