feat: 健康教练对话注入教练人格标识

cfc-backend/src/main/java/com/etotem/cfc/controller/ai/AIChatController.java

@@ -431,6 +431,23 @@ public class AIChatController {
         if (memberId != null) {
             inputs.put("child_id", memberId);
         }
+        // 注入教练人格（对齐 /chat/send 的 mascot 范式；coach_id 用于 LangGraph prompt 路由）
+        com.etotem.cfc.entity.User hcUser = userService.getUserInfo(userId);
+        String hcMascotCode = hcUser != null ? hcUser.getMascot() : null;
+        if (hcMascotCode != null && !hcMascotCode.isEmpty()) {
+            com.etotem.cfc.enums.MascotEnum hcMascot = com.etotem.cfc.enums.MascotEnum.fromCode(hcMascotCode);
+            if (hcMascot != null) {
+                inputs.put("coach_id", hcMascot.getCode());
+                inputs.put("mascot_name", hcMascot.name());
+                inputs.put("mascot_gender", hcMascot.gender());
+                inputs.put("mascot_persona", hcMascot.persona());
+            }
+        } else {
+            inputs.put("coach_id", "");
+            inputs.put("mascot_name", "健康教练");
+            inputs.put("mascot_gender", "");
+            inputs.put("mascot_persona", "");
+        }
         Map<String, Object> resp = aiGateway.chat(query, userId, conversationId, inputs);
         String answer = resp != null ? (String) resp.getOrDefault("answer", "") : "";
         Map<String, Object> result = new LinkedHashMap<>();