fix(hrm): 人员交接详情抽屉数据不回显

el-drawer 早期渲染插槽时 t_id 仍为 null，mounted() 走到 else
分支把 localMode 设成 add，后续 prop 变化 getTid 不再触发。
改用 watch t_id (immediate:true)，prop 何时到位都能拉数据。
同时给 system.post.list 单独加 try/catch 并对 state_ 做空安全
访问，避免内层异常吃掉主数据赋值。

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/views/hrm/empjoin_form.vue

@@ -188,15 +188,22 @@ export default {
                 })
             },
         deep: true,
+        },
+        t_id: {
+            handler(val) {
+                this.localMode = this.mode;
+                if (val) {
+                    this.getTid();
+                } else {
+                    this.formData = { person: [] };
+                    this.localMode = "add";
+                }
+            },
+            immediate: true,
         }
   },
     mounted() {
         this.getGroup();
-        if (this.t_id) {
-            this.getTid();
-        } else {
-            this.localMode = "add";
-        }
     },
     methods: {
         async getTid() {
@@ -204,6 +211,7 @@ export default {
                 let res = await this.$API.hrm.empjoin.item.req(this.t_id);
                 // 获取岗位列表，填充 post_name
                 if (res.person && res.person.length > 0) {
+                    try {
                         const postRes = await this.$API.system.post.list.req({ page: 0 });
                         const postList = Array.isArray(postRes) ? postRes : (postRes.results || postRes.data || []);
                         const postMap = {};
@@ -213,9 +221,12 @@ export default {
                                 p.post_name = postMap[p.post] || '';
                             }
                         });
+                    } catch (postErr) {
+                        console.error('获取岗位列表失败:', postErr);
+                    }
                 }
                 this.formData = res;
-                if (res.ticket_ && res.ticket_.state_.type == 1 && res.create_by == this.$TOOL.data.get("USER_INFO").id) {
+                if (res.ticket_ && res.ticket_.state_ && res.ticket_.state_.type == 1 && res.create_by == this.$TOOL.data.get("USER_INFO").id) {
                     this.localMode = "edit";
                 }
             } catch (error) {