feat: add lora_strength slider (0-1) for style LoRA

app.py

@@ -522,6 +522,7 @@ def infer(
     steps,
     color_match,
     lora_preset="无",
+    lora_strength=1.0,
     out_width=0,
     out_height=0,
     progress=gr.Progress(track_tqdm=True),
@@ -535,10 +536,13 @@ def infer(
     if not prompt or not prompt.strip():
         raise gr.Error("⚠️ Please enter an edit prompt.")
 
-    # 切换 LoRA 预设
-    preset_cfg = LORA_PRESETS.get(lora_preset, LORA_PRESETS["无"])
+    # 切换 LoRA 预设（强度只作用于风格 LoRA，lightning 固定 1.0）
+    preset_names, preset_weights = LORA_PRESETS.get(lora_preset, LORA_PRESETS["无"])
+    weights = list(preset_weights)
+    if len(weights) > 1:
+        weights[1] = max(0.0, min(1.0, float(lora_strength)))
     try:
-        pipe.set_adapters(preset_cfg[0], adapter_weights=preset_cfg[1])
+        pipe.set_adapters(preset_names, adapter_weights=weights)
     except Exception as e:
         print(f"Warning: could not switch LoRA preset '{lora_preset}': {e}")
 
@@ -762,6 +766,10 @@ with gr.Blocks(
                         choices=list(LORA_PRESETS.keys()),
                         value="无",
                     )
+                    lora_strength_input = gr.Slider(
+                        label="LoRA 强度（仅对风格 LoRA 生效）",
+                        minimum=0.0, maximum=1.0, step=0.05, value=1.0,
+                    )
 
                     with gr.Accordion("Advanced Settings", open=False):
                         seed_input = gr.Slider(
@@ -793,7 +801,7 @@ with gr.Blocks(
                 inputs=[
                     source_input, ref_input, prompt_input, negative_prompt_input,
                     seed_input, randomize_seed_input, guidance_scale_input, steps_input,
-                    color_match_input, lora_preset_input,
+                    color_match_input, lora_preset_input, lora_strength_input,
                 ],
                 outputs=[output_image, seed_input],
             ).then(