fix: Possible fix to image to image / refiner setting sync

The main goal is to avoid noisy output no matter what the slider values are.

invokeai/frontend/web/src/features/nodes/util/graphBuilders/addSDXLRefinerToGraph.ts

@@ -98,6 +98,7 @@ export const addSDXLRefinerToGraph = (
     steps: refinerSteps / (1 - refinerStart),
     scheduler: refinerScheduler,
     denoising_start: refinerStart,
+    denoising_end: 1,
   };
 
   graph.edges.push(

invokeai/frontend/web/src/features/nodes/util/graphBuilders/buildLinearSDXLImageToImageGraph.ts

@@ -36,10 +36,10 @@ export const buildLinearSDXLImageToImageGraph = (
     scheduler,
     steps,
     initialImage,
-    img2imgStrength: strength,
     shouldFitToWidthHeight,
     width,
     height,
+    img2imgStrength: strength,
     clipSkip,
     shouldUseCpuNoise,
     shouldUseNoiseSettings,
@@ -113,7 +113,10 @@ export const buildLinearSDXLImageToImageGraph = (
         cfg_scale,
         scheduler,
         steps,
-        denoising_start: shouldUseSDXLRefiner ? refinerStart : 1 - strength,
+        denoising_start: shouldUseSDXLRefiner
+          ? Math.min(refinerStart, 1 - strength)
+          : 1 - strength,
+        denoising_end: shouldUseSDXLRefiner ? refinerStart : 1,
       },
       [IMAGE_TO_LATENTS]: {
         type: 'i2l',
@@ -337,7 +340,7 @@ export const buildLinearSDXLImageToImageGraph = (
     controlnets: [],
     loras: [],
     clip_skip: clipSkip,
-    strength,
+    strength: strength,
     init_image: initialImage.imageName,
     positive_style_prompt: positiveStylePrompt,
     negative_style_prompt: negativeStylePrompt,

invokeai/frontend/web/src/features/sdxl/components/SDXLRefiner/ParamSDXLRefinerStart.tsx

@@ -38,7 +38,7 @@ const ParamSDXLRefinerStart = () => {
   return (
     <IAISlider
       label="Refiner Start"
-      step={shift ? 0.1 : 0.01}
+      step={shift ? 0.05 : 0.01}
       min={0.01}
       max={1}
       onChange={handleChange}