Flatten image edit controls and let CFG/steps be typed past the old slider caps.

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

server/api/extend.post.ts

@@ -3,6 +3,7 @@ import { join } from 'node:path'
 import { composeShotPrompt } from '~/utils/globalLocks'
 import { parsePostedLoraStack, listStudioLoras, persistLoraFields } from '~/server/utils/loras'
 import { readLoraStack } from '~/utils/loras'
+import { clampVideoCfg } from '~/utils/generationPresets'
 import { defaultVideoSteps, isLtxWorkflow, LTX_DISABLED_MESSAGE, ltxWorkflowEnabled, parseVideoWorkflow } from '~/utils/videoModels'
 
 const SAMPLERS = new Set(['res_multistep', 'euler', 'dpmpp_2m'])
@@ -24,11 +25,7 @@ function parseFps(raw: unknown) {
 }
 
 function parseCfg(raw: unknown, turbo: boolean) {
-  const fallback = turbo ? 1.5 : 4
-  const value = Number(raw)
-  if (!Number.isFinite(value)) return fallback
-  const snapped = Math.round(value * 2) / 2
-  return Math.min(10, Math.max(1, snapped))
+  return clampVideoCfg(raw, turbo ? 1.5 : 4)
 }
 
 function parseSampler(raw: unknown) {