feat: 初始化医护端与患者端页面骨架

完成两个 Vite 应用的基础工程化配置、路由、状态管理及第一版业务页面，当前使用演示数据，尚未接入真实后端接口。

patient-h5/src/composables/useSignFlow.ts

@@ -0,0 +1,21 @@
+import { reactive } from 'vue'
+
+import type { SignFlowState } from '@/types/signing'
+
+const initialState: SignFlowState = {
+  patientName: '张*',
+  visitNo: 'MZ20260827018',
+  documentTitle: '儿科急诊特殊检查知情同意书',
+  taskNo: 'CT-20260827-001',
+  consentAccepted: false,
+  signerName: '',
+  relation: '',
+  signatureCaptured: false,
+  submittedAt: '',
+}
+
+export const signingState = reactive<SignFlowState>({ ...initialState })
+
+export function resetSignFlow() {
+  Object.assign(signingState, initialState)
+}