fix: prevent duplicate reasoning-end events in Ollama stream

src/Providers/Ollama/Handlers/Stream.php

@@ -129,13 +129,12 @@ protected function processStream(Response $response, Request $request, int $dept
 
             // If we were emitting thinking and it's now stopped, mark it complete
             if ($this->state->hasThinkingStarted()) {
+                $this->state->markThinkingCompleted();
                 yield new ThinkingCompleteEvent(
                     id: EventID::generate(),
                     timestamp: time(),
                     reasoningId: $this->state->reasoningId()
                 );
-                // Note: Can't easily reset just thinking flag with current StreamState API
-                // This may need adjustment if tests fail
                 // Don't continue here - we want to process the rest of this data chunk
             }
 

src/Streaming/StreamState.php

@@ -132,6 +132,13 @@ public function markThinkingStarted(): self
         return $this;
     }
 
+    public function markThinkingCompleted(): self
+    {
+        $this->thinkingStarted = false;
+
+        return $this;
+    }
+
     public function appendText(string $text): self
     {
         $this->currentText .= $text;