Join pre/prompt/post for Comfy, stop zero-size generates snapping to a small square, and give the phone library a real closeable preview.

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

utils/promptParts.ts

@@ -15,6 +15,16 @@ export function composePromptParts(pre: string, prompt: string, post: string) {
     .join('\n\n')
 }
 
+/** Combine wrappers for Comfy. If mid already includes pre/post, do not wrap twice. */
+export function joinPromptParts(pre?: string, mid?: string, post?: string) {
+  const parts = restorePromptParts(mid || '', {
+    pre: pre || '',
+    prompt: mid || '',
+    post: post || ''
+  })
+  return composePromptParts(parts.pre, parts.prompt, parts.post)
+}
+
 export function applyPromptParts(parts: PromptParts, middle: string) {
   return composePromptParts(parts.pre, middle, parts.post)
 }
@@ -45,7 +55,7 @@ function hasWrapperKey(item: object | null | undefined, key: 'promptPre' | 'prom
   return Boolean(item && Object.prototype.hasOwnProperty.call(item, key))
 }
 
-/** First source that actually sent the key wins, including empty string. Omitted keys fall through. */
+/** First non-empty wrapper wins. Blank strings fall through so a shot can inherit family pre/post. */
 export function resolvePromptWrappers(
   ...sources: Array<PromptWrapperFields | null | undefined>
 ) {
@@ -56,12 +66,18 @@ export function resolvePromptWrappers(
   for (const source of sources) {
     if (!source) continue
     if (!sawPre && hasWrapperKey(source, 'promptPre') && source.promptPre != null) {
-      promptPre = sanitizePromptPart(source.promptPre)
-      sawPre = true
+      const value = sanitizePromptPart(source.promptPre)
+      if (value.trim()) {
+        promptPre = value
+        sawPre = true
+      }
     }
     if (!sawPost && hasWrapperKey(source, 'promptPost') && source.promptPost != null) {
-      promptPost = sanitizePromptPart(source.promptPost)
-      sawPost = true
+      const value = sanitizePromptPart(source.promptPost)
+      if (value.trim()) {
+        promptPost = value
+        sawPost = true
+      }
     }
     if (sawPre && sawPost) break
   }