fix: mcp test optimization disabled by default (#1515)

* fix: optimization ON by default for mcp test tool

* test: added tests to verify no-optimization flag only when explicitly false

Author: RuiMiguel

lib/src/mcp/mcp_server.dart

@@ -314,9 +314,7 @@ Only one value can be selected.
     if (args['recursive'] == true) {
       cliArgs.add('-r');
     }
-    if (args['optimization'] == true) {
-      cliArgs.add('--optimization');
-    } else {
+    if (args['optimization'] == false) {
       cliArgs.add('--no-optimization');
     }
     if (args['concurrency'] != null) {

test/src/mcp/mcp_server_test.dart

@@ -284,12 +284,29 @@ void main() {
     });
 
     group('Tool: test', () {
-      test('handles basic case with --no-optimization', () async {
+      test('handles default args (no flags added)', () async {
         await sendRequest(
           CallToolRequest.methodName,
           _params(CallToolRequest(name: 'test', arguments: {})),
         );
 
+        final capturedArgs =
+            verify(() => mockCommandRunner.run(captureAny())).captured.first
+                as List<String>;
+        expect(capturedArgs, ['test']);
+      });
+
+      test('passes --no-optimization when explicitly false', () async {
+        await sendRequest(
+          CallToolRequest.methodName,
+          _params(
+            CallToolRequest(
+              name: 'test',
+              arguments: {'optimization': false},
+            ),
+          ),
+        );
+
         final capturedArgs =
             verify(() => mockCommandRunner.run(captureAny())).captured.first
                 as List<String>;
@@ -331,7 +348,6 @@ void main() {
           'test',
           '--coverage',
           '-r',
-          '--optimization',
           '-j',
           '8',
           '-t',