[studio] full finetuning studio (#4461)

* full finetuning studio

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update studio/backend/core/training/trainer.py

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Daniel Han <danielhanchen@gmail.com>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

studio/backend/core/training/trainer.py

@@ -772,6 +772,11 @@ class UnslothTrainer:
             if self.should_stop:
                 return False
 
+            if full_finetuning:
+                # Enable training mode for full fine-tuning
+                # This ensures all model parameters are trainable; otherwise, they might be frozen.
+                self.model.for_training()
+
             self._update_progress(status_message = "Model loaded successfully")
             logger.info("Model loaded successfully")
             return True