feat(tygl): 已有档案时按钮显示「更新档案」，更新成功后返回上一页

src/pages/tygl/index.vue

@@ -148,7 +148,7 @@
 
       <view class="action-card">
         <button class="ghost-btn" @click="saveDraft">保存草稿</button>
-        <button class="primary-btn" @click="submitForm">提交档案</button>
+        <button class="primary-btn" @click="submitForm">{{ submitButtonText }}</button>
       </view>
     </scroll-view>
 
@@ -388,6 +388,10 @@ export default {
     }
   },
   computed: {
+    // 已有档案（formId 来自 getCurrentTyglForm）时按钮切换为更新
+    submitButtonText() {
+      return this.formId ? '更新档案' : '提交档案'
+    },
     nationLabels() {
       return this.nationOptions.map((item) => item.label)
     },
@@ -1009,11 +1013,12 @@ export default {
         return
       }
       try {
+        const isUpdate = Boolean(this.formId)
         const payload = this.buildSubmitPayload()
-        const result = this.formId
+        const result = isUpdate
           ? await updateTyglForm(payload)
           : await saveTyglForm(payload)
-        if (!this.formId && result && result.id) {
+        if (!isUpdate && result && result.id) {
           this.formId = result.id
         }
         const savedAt = this.formatNow()
@@ -1023,9 +1028,24 @@ export default {
           status: 'submitted'
         })
         this.draftSavedAt = savedAt
+        if (isUpdate) {
+          // 更新成功：提示后返回上一页
+          uni.showToast({
+            title: '更新成功',
+            icon: 'success'
+          })
+          setTimeout(() => {
+            uni.navigateBack({
+              fail: () => {
+                uni.reLaunch({url: '/pages/index/index'})
+              }
+            })
+          }, 800)
+          return
+        }
         uni.showModal({
           title: '提交成功',
-          content: this.formId ? '团员档案已更新。' : '团员档案已创建。',
+          content: '团员档案已创建。',
           showCancel: false
         })
       } catch (error) {