Separate LaTeX parsing into independent tool for LLM calling

src/main/kotlin/tools/SendLaTeXExpression.kt

@@ -0,0 +1,46 @@
+package top.jie65535.mirai.tools
+
+import com.aallam.openai.api.chat.Tool
+import com.aallam.openai.api.core.Parameters
+import kotlinx.serialization.json.*
+import net.mamoe.mirai.event.events.MessageEvent
+import top.jie65535.mirai.LaTeXConverter
+import net.mamoe.mirai.utils.ExternalResource.Companion.toExternalResource
+
+class SendLaTeXExpression : BaseAgent(
+    tool = Tool.function(
+        name = "sendLaTeXExpression",
+        description = "发送LaTeX数学表达式，将其渲染为图片并发送",
+        parameters = Parameters.buildJsonObject {
+            put("type", "object")
+            putJsonObject("properties") {
+                putJsonObject("expression") {
+                    put("type", "string")
+                    put("description", "LaTeX数学表达式")
+                }
+            }
+            putJsonArray("required") {
+                add("expression")
+            }
+        }
+    )
+) {
+    override suspend fun execute(args: JsonObject?, event: MessageEvent): String {
+        requireNotNull(args)
+        val expression = args.getValue("expression").jsonPrimitive.content
+        
+        try {
+            // 将LaTeX表达式转换为图片
+            val imageByteArray = LaTeXConverter.convertToImage(expression, "png")
+            val resource = imageByteArray.toExternalResource("png")
+            val image = event.subject.uploadImage(resource)
+            
+            // 发送图片消息
+            event.subject.sendMessage(image)
+            
+            return "成功发送LaTeX表达式"
+        } catch (ex: Throwable) {
+            return "处理LaTeX表达式时发生异常: ${ex.message}"
+        }
+    }
+}