feat(ui): Add Export JSON button to Tester UI

dap-gateway/src/main/resources/static/tester.html

@@ -93,6 +93,9 @@
                 <p class="text-base" style="color:#a1a1aa;">Batch execute registered tools, customize payloads, and view detailed results.</p>
             </div>
             <div class="flex items-center gap-3">
+                <button id="exportJsonBtn" class="btn-sm flex items-center gap-2 h-10 px-4 text-sm" onclick="exportJson()">
+                    Export JSON
+                </button>
                 <button id="exportCsvBtn" class="btn-sm flex items-center gap-2 h-10 px-4 text-sm" onclick="exportCsv()" style="display: none;">
                     Export CSV
                 </button>
@@ -888,6 +891,33 @@
             document.body.removeChild(link);
         }
 
+        function exportJson() {
+            if (allTools.length === 0) {
+                alert("No tools loaded.");
+                return;
+            }
+            // original tools array without the temp properties added for testing
+            const cleanTools = allTools.map(t => {
+                const clean = { ...t };
+                delete clean._customPayload;
+                delete clean._lastStatus;
+                delete clean._isFailed;
+                delete clean._latency;
+                delete clean._responseData;
+                delete clean._tempParsed;
+                return clean;
+            });
+            const jsonContent = JSON.stringify({ tools: cleanTools }, null, 2);
+            const blob = new Blob([jsonContent], { type: 'application/json' });
+            const url = URL.createObjectURL(blob);
+            const link = document.createElement("a");
+            link.setAttribute("href", url);
+            link.setAttribute("download", `mcp_tools_list_${new Date().toISOString().slice(0, 10)}.json`);
+            document.body.appendChild(link);
+            link.click();
+            document.body.removeChild(link);
+        }
+
         document.addEventListener('DOMContentLoaded', fetchTools);
     </script>
 </body>