feat(font): 新增字体设置并统一医护端与患者端文书字体

patient-h5/src/composables/useSignFlow.ts

@@ -1,3 +1,4 @@
+import { loadDocumentFont } from '../../../packages/document-fonts'
 import { reactive } from 'vue'
 
 import {
@@ -59,6 +60,8 @@ const initialState: SignFlowState = {
   age: '',
   visitNo: 'MZ20260827018',
   department: '',
+  documentFontFamily: '',
+  documentFontReady: false,
   documentTitle: '儿科急诊特殊检查知情同意书',
   templateVersion: 'v1.0.0',
   documentContentHtml: '',
@@ -447,6 +450,12 @@ async function loadSigningContext(): Promise<SigningContextResponse | null> {
   try {
     const context = await fetchSigningContext(proof)
     applyContext(context)
+    signingState.documentFontReady = false
+    signingState.documentFontFamily = await loadDocumentFont(
+      context.document?.font ?? null,
+      import.meta.env.VITE_API_BASE_URL || '/api',
+    )
+    signingState.documentFontReady = true
     persistSession()
     return context
   } catch (error) {
@@ -488,6 +497,7 @@ function applyDemoContext() {
   signingState.fields = [
     { id: DEMO_PATIENT_FIELD_ID, label: '患者签名', kind: 'signature', required: true },
   ]
+  signingState.documentFontReady = true
   signingState.documentLoaded = true
   signingState.documentError = ''
   signingState.taskStatus = 'WAITING_SIGN'
@@ -583,7 +593,9 @@ export async function submitRealSignature(input: {
     !signingState.taskId ||
     !signingState.deliveryId ||
     !signingState.uploadToken ||
-    !input.consentAccepted
+    !input.consentAccepted ||
+    !signingState.documentLoaded ||
+    !signingState.documentFontReady
   ) {
     throw new Error('签署凭证或知情确认状态无效，请重新打开签署链接。')
   }