fix: keep dave chat responsive on llm failures

test/terminal-agent.test.mjs

@@ -132,6 +132,52 @@ test('repeated tool calls during finalization fail closed without leaking protoc
   assert.equal(result.notify, false);
 });
 
+test('empty model responses are repaired instead of shown to the operator', async () => {
+  let call = 0;
+  const agent = new TerminalAgent({
+    provider: {
+      isConfigured: true,
+      async complete() {
+        call++;
+        return call === 1
+          ? { text: '' }
+          : { text: JSON.stringify({ type: 'final', answer: 'Ich pruefe den letzten Sweep weiter.', confidence: 'low', evidence: [], notify: false, priority: 'routine' }) };
+      },
+    },
+    registry: new TerminalToolRegistry([]),
+  });
+
+  const result = await agent.run('Ist noch woanders was passiert?', { preferredLanguage: 'de' });
+  assert.equal(result.answer, 'Ich pruefe den letzten Sweep weiter.');
+  assert.doesNotMatch(result.answer, /no usable response/i);
+});
+
+test('provider timeout falls back to the local sweep snapshot', async () => {
+  const agent = new TerminalAgent({
+    provider: {
+      isConfigured: true,
+      async complete() {
+        throw new Error('The operation was aborted due to timeout');
+      },
+    },
+    registry: new TerminalToolRegistry([]),
+  });
+  const context = JSON.stringify({
+    news: [{ title: 'Regional escalation report' }],
+    urgentOsint: ['OSINT: power outage near border'],
+    degradedSources: [{ name: 'GDELT' }, { name: 'ACLED' }],
+    ideas: [{ title: 'Gold hedge' }],
+  });
+
+  const result = await agent.run('Auch auf andere Teile der Welt', { preferredLanguage: 'de', context });
+  assert.match(result.answer, /keine stabile Modellantwort/);
+  assert.match(result.answer, /letzten lokalen Sweep/);
+  assert.match(result.answer, /OSINT: power outage near border/);
+  assert.match(result.answer, /Steuern kann ich per Chat/);
+  assert.equal(result.trace[0].tool, 'llm');
+  assert.equal(result.trace[0].status, 'failed');
+});
+
 test('agent propagates preferred German language through tool and finalization prompts', async () => {
   const prompts = [];
   let call = 0;