add lora funetine webUI; optimize lora save and load logic

conf/voxcpm_v1/voxcpm_finetune_lora.yaml

@@ -19,10 +19,18 @@ tensorboard: /path/to/logs/finetune_lora
 lambdas:
   loss/diff: 1.0
   loss/stop: 1.0
+
+# LoRA configuration
 lora:
   enable_lm: true
   enable_dit: true
   enable_proj: false
   r: 32               
   alpha: 16           
-  dropout: 0.0       
+  dropout: 0.0
+
+# Distribution options (optional)
+# - If distribute=false (default): save pretrained_path as base_model in lora_config.json
+# - If distribute=true: save hf_model_id as base_model (hf_model_id is required)
+# hf_model_id: "openbmb/VoxCPM-0.5B"
+# distribute: true