fix(health): 统一随访类型为 5 种 — phone/outpatient/home_visit/online/wechat

- validation.rs: face_to_face 替换为 outpatient，新增 home_visit/wechat
- FollowUpTaskList.tsx: 新增 online 选项，与后端对齐
- 迁移 078: follow_up_task + follow_up_record face_to_face → outpatient

crates/erp-server/migration/src/lib.rs

@@ -77,6 +77,7 @@ mod m20260426_000074_create_vital_signs_hourly;
 mod m20260426_000075_create_patient_devices;
 mod m20260426_000076_create_alert_rules;
 mod m20260426_000077_create_alerts;
+mod m20260427_000078_normalize_follow_up_types;
 
 pub struct Migrator;
 
@@ -161,6 +162,7 @@ impl MigratorTrait for Migrator {
             Box::new(m20260426_000075_create_patient_devices::Migration),
             Box::new(m20260426_000076_create_alert_rules::Migration),
             Box::new(m20260426_000077_create_alerts::Migration),
+            Box::new(m20260427_000078_normalize_follow_up_types::Migration),
         ]
     }
 }