feat(server): 申请单支持草稿保存并统一删除权限口径

- user_agent_application 新增草稿分支：识别'保存草稿/存草稿/先保存'等意图，复用可编辑记录更新或建草稿，提交前单据重叠仍拦截
- 草稿态返回单号与待提交提示，submit 仅在确认提交分支触发，避免草稿进入审批流
- reimbursements 删除接口文案与判定统一为系统管理员可删、申请人删自有草稿/退回单，申请单判定改用 is_application_claim_no
- 更新财务规则表与 reimbursement 端点测试

server/src/app/api/v1/endpoints/reimbursements.py

@@ -10,16 +10,17 @@ from app.api.deps import CurrentUserContext, get_current_user, get_db
 from app.api.pagination import PageNumber, PageSize, page_payload, wants_page
 from app.schemas.budget import BudgetClaimAnalysisRead
 from app.schemas.common import ErrorResponse, PaginatedResponse
+from app.schemas.ontology import OntologyParseResult, OntologyPermission
 from app.schemas.reimbursement import (
     ExpenseApplicationPreviewActionPayload,
     ExpenseApplicationPreviewActionResponse,
     ExpenseApplicationPreviewActionResult,
-    ExpenseClaimAttachmentActionResponse,
     ExpenseClaimActionResponse,
-    ExpenseClaimAttachmentRead,
     ExpenseClaimApprovalPayload,
-    ExpenseClaimItemCreate,
+    ExpenseClaimAttachmentActionResponse,
+    ExpenseClaimAttachmentRead,
     ExpenseClaimItemActionResponse,
+    ExpenseClaimItemCreate,
     ExpenseClaimItemUpdate,
     ExpenseClaimRead,
     ExpenseClaimReturnPayload,
@@ -30,9 +31,9 @@ from app.schemas.reimbursement import (
     TravelReimbursementCalculatorRequest,
     TravelReimbursementCalculatorResponse,
 )
-from app.schemas.ontology import OntologyParseResult, OntologyPermission
 from app.schemas.user_agent import UserAgentRequest
 from app.services.budget import BudgetService
+from app.services.document_numbering import is_application_claim_no
 from app.services.expense_claims import ExpenseClaimService
 from app.services.reimbursement import ReimbursementService
 from app.services.travel_reimbursement_calculator import TravelReimbursementCalculatorService
@@ -119,7 +120,10 @@ def _build_application_preview_action_context(
     "/application-preview-action",
     response_model=ExpenseApplicationPreviewActionResponse,
     summary="按申请核对预览快速保存或提交申请单",
-    description="用于 AI 工作台已完成表格核对后的轻量建单/提交流程，避免重复进入通用 Orchestrator 编排。",
+    description=(
+        "用于 AI 工作台已完成表格核对后的轻量建单/提交流程，"
+        "避免重复进入通用 Orchestrator 编排。"
+    ),
 )
 def run_application_preview_action(
     payload: ExpenseApplicationPreviewActionPayload,
@@ -831,7 +835,7 @@ def pay_expense_claim(
     "/claims/{claim_id}",
     response_model=ExpenseClaimActionResponse,
     summary="删除报销单",
-    description="申请人可删除自己的草稿、待补充或退回单据（含申请单和报销单）；高级财务人员可删除可见的非归档报销单；已归档单据仅高级管理员可删除，财务人员没有删除权限。",
+    description="申请人可删除自己的草稿、待补充或退回单据（含申请单和报销单）；系统管理员可删除单据；已归档单据仅系统管理员可删除。",
     responses={
         status.HTTP_404_NOT_FOUND: {
             "model": ErrorResponse,
@@ -855,7 +859,11 @@ def delete_expense_claim(claim_id: str, db: DbSession, current_user: CurrentUser
 
     claim_no = str(claim.claim_no or "").strip()
     expense_type = str(claim.expense_type or "").strip().lower()
-    document_label = "申请单" if claim_no.upper().startswith(("AP-", "APP-")) or expense_type.endswith("_application") else "报销单"
+    document_label = (
+        "申请单"
+        if is_application_claim_no(claim_no) or expense_type.endswith("_application")
+        else "报销单"
+    )
     return ExpenseClaimActionResponse(
         message=f"{claim.claim_no} {document_label}已删除。",
         claim_id=claim.id,