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/reimbursement.py

@@ -1,20 +1,37 @@
 from sqlalchemy.orm import Session
 
+from app.core.logging import get_logger
 from app.models.reimbursement import ReimbursementRequest
 from app.repositories.reimbursement import ReimbursementRepository
 from app.schemas.reimbursement import ReimbursementCreate
 
+logger = get_logger("app.services.reimbursement")
+
 
 class ReimbursementService:
     def __init__(self, db: Session) -> None:
         self.repository = ReimbursementRepository(db)
 
     def list_reimbursements(self) -> list[ReimbursementRequest]:
-        return self.repository.list()
+        items = self.repository.list()
+        logger.info("Listed reimbursements (count=%d)", len(items))
+        return items
 
     def get_reimbursement(self, request_id: str) -> ReimbursementRequest | None:
-        return self.repository.get(request_id)
+        request = self.repository.get(request_id)
+        if request:
+            logger.info("Fetched reimbursement id=%s no=%s", request_id, request.request_no)
+        else:
+            logger.warning("Reimbursement not found id=%s", request_id)
+        return request
 
     def create_reimbursement(self, payload: ReimbursementCreate) -> ReimbursementRequest:
         request = ReimbursementRequest(**payload.model_dump(), status="draft")
-        return self.repository.create(request)
+        created = self.repository.create(request)
+        logger.info(
+            "Created reimbursement id=%s no=%s amount=%s",
+            created.id,
+            created.request_no,
+            created.amount,
+        )
+        return created