[Developer] #424 add MCP routing chatbot demo

src/main/java/com/cloudhandson/vpdbackoffice/web/McpChatbotController.java

@@ -0,0 +1,47 @@
+package com.cloudhandson.vpdbackoffice.web;
+
+import com.cloudhandson.vpdbackoffice.service.McpChatbotService;
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
+
+@Controller
+public class McpChatbotController {
+
+  private final McpChatbotService chatbotService;
+
+  public McpChatbotController(McpChatbotService chatbotService) {
+    this.chatbotService = chatbotService;
+  }
+
+  @GetMapping("/mcp-chatbot")
+  public String page() {
+    return "mcp-chatbot";
+  }
+
+  @PostMapping("/mcp-chatbot")
+  public String chat(
+      @RequestParam(defaultValue = "vpd-live") String contextPath,
+      @RequestParam(defaultValue = "") String question,
+      @RequestParam(defaultValue = "") String bearerToken,
+      @RequestParam(defaultValue = "50") int limit,
+      HttpServletRequest request,
+      Model model
+  ) {
+    try {
+      String serverOrigin = ServletUriComponentsBuilder.fromRequestUri(request)
+          .replacePath(null)
+          .replaceQuery(null)
+          .build()
+          .toUriString();
+      model.addAttribute("result", chatbotService.chat(serverOrigin, contextPath, question, bearerToken, limit));
+    } catch (Exception e) {
+      model.addAttribute("errorMessage", e.getMessage());
+    }
+    return "fragments/mcp-chatbot-result :: result";
+  }
+}