fix: improve stuck detection to track failed tool calls

- Track failed tool calls in call history (parse errors, execution errors)
- Increment turns counter for failed tool calls too
- Stuck detection now works even when tools fail repeatedly
- Inspired by Ruflo and Hermes Agent best practices

Fixes the bug where zCode would get stuck in infinite loops when tool calls fail.

Test results: ✅ All stuck detection tests passing

test-intent-restart.cjs

@@ -0,0 +1,47 @@
+const intentDetector = require('./src/bot/intent-detector.js');
+
+// Test cases from the original failing scenarios
+const testCases = [
+  { text: 'Hey', expected: 'greeting' },
+  { text: 'Thanks', expected: 'greeting' },
+  { text: 'Continue', expected: 'greeting' },
+  { text: 'Done', expected: 'greeting' },
+  { text: 'I asked you a question about your earlier task you ignore me…', expected: 'question' },
+  { text: 'You didn\'t answer my question earlier', expected: 'question' },
+  { text: 'What about the landing page design?', expected: 'question' },
+  { text: 'How is it going?', expected: 'greeting' },
+  { text: 'Status', expected: 'status' },
+  { text: 'Ping', expected: 'status' },
+  { text: 'Check my tasks', expected: 'status' },
+];
+
+console.log('🎯 INTENT DETECTOR TEST RESULTS\n');
+console.log('─'.repeat(80));
+
+let passed = 0;
+let failed = 0;
+
+testCases.forEach((test, index) => {
+  const result = intentDetector.detectIntent(test.text);
+  const status = result.type === test.expected ? '✅ PASS' : '❌ FAIL';
+
+  if (result.type === test.expected) {
+    passed++;
+  } else {
+    failed++;
+  }
+
+  console.log(`${status} ${index + 1}. "${test.text}"`);
+  console.log(`   Expected: ${test.expected} → Got: ${result.type} (confidence: ${result.confidence.toFixed(2)})`);
+  if (result.type !== test.expected) {
+    console.log(`   ❌ MISMATCH!`);
+  }
+  console.log('');
+});
+
+console.log('─'.repeat(80));
+console.log(`\n📊 SUMMARY: ${passed}/${testCases.length} PASSED`);
+console.log(`   Success rate: ${(passed / testCases.length * 100).toFixed(1)}%`);
+console.log(`\n${'─'.repeat(80)}\n`);
+
+process.exit(failed > 0 ? 1 : 0);