Deduplicate logic across controllers, auth, and schema fixes

src/main/kotlin/com/android/trisolarisserver/component/LlamaClient.kt

@@ -38,13 +38,7 @@ class LlamaClient(
                 )
             )
         )
-        val headers = HttpHeaders()
-        headers.contentType = MediaType.APPLICATION_JSON
-        val entity = HttpEntity(payload, headers)
-        val response = restTemplate.postForEntity(baseUrl, entity, String::class.java)
-        val body = response.body ?: return ""
-        val node = objectMapper.readTree(body)
-        return node.path("choices").path(0).path("message").path("content").asText()
+        return post(payload)
     }
 
     fun askText(content: String, question: String): String {
@@ -61,6 +55,10 @@ class LlamaClient(
                 )
             )
         )
+        return post(payload)
+    }
+
+    private fun post(payload: Map<String, Any>): String {
         val headers = HttpHeaders()
         headers.contentType = MediaType.APPLICATION_JSON
         val entity = HttpEntity(payload, headers)