Add Image v2 Refine for on-device regional edits.

Mask painter and denoise strength sit beside Edit and Compose. The canned hand/chest prompt helper is gone so that text stays yours.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/utils/generationPresets.ts

@@ -21,6 +21,8 @@ import {
   IMAGE_V2_SNOFS_CLIP,
   IMAGE_V2_SNOFS_MODEL,
   IMAGE_V2_STEPS_DEFAULT,
+  IMAGE_V2_DENOISE_DEFAULT,
+  clampImageV2Denoise,
   clampImageV2Strength,
   parseImageV2Mode,
   parseImageV2Task,
@@ -114,7 +116,7 @@ function sanitizeImageV2Settings(raw: unknown): ImageV2PresetSettings {
   const turbo = rec.turbo === true
   return {
     mode,
-    task: mode === 'compose' ? parseImageV2Task(rec.task, 'scene') : 'scene',
+    task: mode === 'compose' ? parseImageV2Task(rec.task, 'scene') : mode === 'refine' ? 'refine' : 'scene',
     negative: String(rec.negative || '').slice(0, 2000),
     snofsModel: clampImageV2Strength(rec.snofsModel ?? rec.snofs_model, IMAGE_V2_SNOFS_MODEL),
     snofsClip: clampImageV2Strength(rec.snofsClip ?? rec.snofs_clip, IMAGE_V2_SNOFS_CLIP),
@@ -123,7 +125,8 @@ function sanitizeImageV2Settings(raw: unknown): ImageV2PresetSettings {
     steps: turbo ? 8 : clampImageSteps(rec.steps, IMAGE_V2_STEPS_DEFAULT),
     cfg: turbo ? 1 : clampImageCfg(rec.cfg, IMAGE_V2_CFG_DEFAULT),
     megapixels: clampImageScaleMegapixels(rec.megapixels ?? rec.scaleMegapixels, 1),
-    turbo
+    turbo,
+    strength: mode === 'refine' ? clampImageV2Denoise(rec.strength, IMAGE_V2_DENOISE_DEFAULT) : undefined
   }
 }