fix(openai): stream start order

src/Providers/OpenAI/Handlers/Stream.php

@@ -250,6 +250,8 @@ protected function processStream(Response $response, Request $request, int $dept
                     timestamp: time(),
                     messageId: $this->state->messageId()
                 );
+
+                $this->state->markTextCompleted();
             }
 
             if (data_get($data, 'type') === 'response.completed') {

src/Streaming/StreamState.php

@@ -118,6 +118,13 @@ public function markTextStarted(): self
         return $this;
     }
 
+    public function markTextCompleted(): self
+    {
+        $this->textStarted = false;
+
+        return $this;
+    }
+
     public function markThinkingStarted(): self
     {
         $this->thinkingStarted = true;

tests/Unit/Streaming/StreamStateTest.php

@@ -101,6 +101,17 @@
         ->and($state->hasTextStarted())->toBeTrue();
 });
 
+it('markTextCompleted returns self and resets flag', function (): void {
+    $state = new StreamState;
+    $state->markTextStarted();
+
+    $result = $state->markTextCompleted();
+
+    expect($result)->toBe($state)
+        ->and($state->hasTextStarted())->toBeFalse()
+        ->and($state->shouldEmitTextStart())->toBeTrue();
+});
+
 it('markThinkingStarted returns self and sets flag', function (): void {
     $state = new StreamState;