feat: 优化差旅报销预审流程与个人工作台 UI 体系

- 完善 user_agent_application 申请差旅报销预审槽位与消息组装
- 增强预算助理报告与风险建议卡片交互
- 重构登录页视觉样式与移动端响应式适配
- 优化个人工作台、文档中心、政策中心、员工管理等页面布局
- 拆分 travelRequestDetailPreReviewModel 为 advice/submit 模型
- 补充报销草稿、风险复核、Item Sync 与模板执行器测试覆盖

server/src/app/services/expense_claim_draft_flow.py

@@ -307,6 +307,13 @@ class ExpenseClaimDraftFlowMixin:
                 claim.risk_flags_json = final_risk_flags
 
             self.db.flush()
+            skip_primary_item = self._should_skip_application_link_placeholder_item(
+                claim=claim,
+                context_json=context_json,
+                document_specs=document_specs,
+                attachment_count=attachment_count,
+                amount=amount,
+            )
             if document_specs and (is_new_claim or review_action in DOCUMENT_ASSOCIATION_REVIEW_ACTIONS):
                 if review_action == "link_to_existing_draft" and claim.items:
                     self._append_document_items(
@@ -319,6 +326,8 @@ class ExpenseClaimDraftFlowMixin:
                         item_specs=document_specs,
                     )
                 self._sync_claim_from_items(claim)
+            elif skip_primary_item:
+                self._sync_application_link_draft_without_items(claim)
             else:
                 self._upsert_primary_item(
                     claim=claim,
@@ -379,6 +388,66 @@ class ExpenseClaimDraftFlowMixin:
             "invoice_count": int(claim.invoice_count or 0),
         }
 
+    def _sync_application_link_draft_without_items(self, claim: ExpenseClaim) -> None:
+        claim.amount = Decimal("0.00")
+        claim.invoice_count = 0
+        claim.risk_flags_json = self._merge_claim_attachment_risk_flags(claim, [])
+        claim.risk_flags_json = self._merge_claim_platform_risk_preview_flags(claim, [])
+
+    def _should_skip_application_link_placeholder_item(
+        self,
+        *,
+        claim: ExpenseClaim | None,
+        context_json: dict[str, Any],
+        document_specs: list[dict[str, Any]],
+        attachment_count: int,
+        amount: Decimal | None,
+    ) -> bool:
+        if document_specs or attachment_count > 0:
+            return False
+        if claim is not None and list(claim.items or []):
+            return False
+        if self._build_application_link_flag(context_json) is None:
+            return False
+
+        application_amounts = self._resolve_application_amount_candidates(context_json)
+        review_values = self._normalize_context_object(context_json.get("review_form_values"))
+        raw_amount = str(review_values.get("amount") or "").strip()
+        if raw_amount:
+            parsed_amount = self._parse_context_money_amount(raw_amount)
+            if parsed_amount is None:
+                return True
+            return bool(application_amounts and parsed_amount in application_amounts)
+
+        if amount is None or amount <= Decimal("0.00"):
+            return True
+        return bool(application_amounts and amount in application_amounts)
+
+    @classmethod
+    def _resolve_application_amount_candidates(cls, context_json: dict[str, Any]) -> set[Decimal]:
+        review_values = cls._normalize_context_object(context_json.get("review_form_values"))
+        scene_selection = cls._normalize_context_object(context_json.get("expense_scene_selection"))
+        candidates: set[Decimal] = set()
+        for source in (review_values, scene_selection, context_json):
+            for key in ("application_amount", "application_amount_label", "applicationAmount", "applicationAmountLabel"):
+                parsed = cls._parse_context_money_amount(source.get(key))
+                if parsed is not None:
+                    candidates.add(parsed)
+        return candidates
+
+    @staticmethod
+    def _parse_context_money_amount(value: Any) -> Decimal | None:
+        raw_value = str(value or "").strip()
+        if not raw_value:
+            return None
+        compact = re.sub(r"[^\d.\-]", "", raw_value.replace(",", ""))
+        if not compact or compact in {"-", ".", "-."}:
+            return None
+        try:
+            return Decimal(compact).quantize(Decimal("0.01"))
+        except (InvalidOperation, ValueError):
+            return None
+
     @staticmethod
     def _merge_application_link_flag(
         risk_flags: list[Any],