Fix Use as input and uploaded stills so I2V is not stuck waiting for a still.

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

pages/index.vue

@@ -811,6 +811,7 @@
         </div>
         <p v-if="studioMode === 'video' && videoBusy" class="text-xs text-zinc-400">The current job keeps running in Output. This submit waits in the job queue.</p>
         <p v-else-if="studioMode === 'edit' && (videoBusy || editBusy)" class="text-xs text-zinc-400">The current job keeps running in Output. This submit waits in the job queue.</p>
+        <p v-if="studioMode === 'video' && videoBlockReason" class="text-xs text-zinc-400">{{ videoBlockReason }}</p>
         <p v-if="studioMode === 'edit' && editBlockReason" class="text-xs text-zinc-400">{{ editBlockReason }}</p>
 
         <div v-if="studioJobs.length" class="rounded-2xl border border-white/10 bg-zinc-950/40 p-4">
@@ -1015,9 +1016,9 @@
           <p v-else-if="playingLastSavedWhileBusy" class="mt-3 text-xs text-zinc-500">
             Playing the last saved part. The shot still encoding cannot be scrubbed until it saves.
           </p>
-          <div v-if="videoUrl && !lockedSave" class="mt-4 flex flex-wrap gap-3">
+          <div v-if="(videoUrl && !lockedSave) || canUseGeneratedStill" class="mt-4 flex flex-wrap gap-3">
             <a
-              v-if="!awaitingReveal"
+              v-if="videoUrl && !lockedSave && !awaitingReveal"
               :href="videoUrl"
               :download="`${videoDownloadName}.mp4`"
               class="inline-flex rounded-2xl border border-white/15 px-4 py-2 text-sm hover:border-amber-300/50"
@@ -1032,6 +1033,14 @@
             >
               Extend Video
             </button>
+            <button
+              v-if="canUseGeneratedStill"
+              type="button"
+              class="inline-flex rounded-2xl border border-amber-300/40 px-4 py-2 text-sm text-amber-100 hover:border-amber-300/70"
+              @click="useEditAsInput"
+            >
+              Use the image I just generated as input
+            </button>
           </div>
           <div v-if="extendOpen" class="mt-4 space-y-4 rounded-2xl border border-white/10 bg-zinc-950/50 p-4">
             <div class="flex items-start justify-between gap-3">
@@ -2097,9 +2106,24 @@ const liveElapsedLabel = computed(() => (
 const playingLastSavedWhileBusy = computed(() => (
   videoBusy.value && Boolean(videoUrl.value) && !watchingLibrary.value && !lockedSave.value
 ))
-const liveStatusMessage = computed(() => (
-  outputProgressKind.value === 'edit' ? editStatusMessage.value : statusMessage.value
-))
+function idleInputStatus(kind: 'video' | 'edit') {
+  if (kind === 'edit') return file.value ? 'Still ready. Edit when you are ready.' : 'Waiting for a still.'
+  if (textToVideo.value) {
+    return file.value
+      ? 'Still loaded (optional). Generate when you are ready.'
+      : 'Ready for text-to-video.'
+  }
+  return file.value ? 'Still ready. Generate when you are ready.' : 'Waiting for a still.'
+}
+
+const liveStatusMessage = computed(() => {
+  if (outputProgressKind.value === 'edit') {
+    if (editBusy.value || editResultUrl.value || editLockedSave.value) return editStatusMessage.value
+    return idleInputStatus('edit')
+  }
+  if (videoBusy.value || videoUrl.value || lockedSave.value) return statusMessage.value
+  return idleInputStatus('video')
+})
 const liveStatusBusy = computed(() => (
   outputProgressKind.value === 'edit' ? editStatusBusy.value : statusBusy.value
 ))
@@ -2212,9 +2236,19 @@ const queueReady = computed(() => {
   if (shotScriptMode.value) return parsedShots.value.length > 0 && parsedShots.value.every(shot => shot.prompt.trim())
   return extensionQueue.value.every(item => item.prompt.trim())
 })
-const videoGenerateDisabled = computed(() => {
-  return (!textToVideo.value && !file.value) || !prompt.value.trim() || !folderId.value || !queueReady.value
+const canUseGeneratedStill = computed(() => Boolean(
+  editResultUrl.value && !editLockedSave.value && !editAwaitingReveal.value
+))
+const videoBlockReason = computed(() => {
+  if (!textToVideo.value && !file.value) return 'Load a still first. Image-to-video needs an input still.'
+  if (!prompt.value.trim()) return 'Write a motion prompt first.'
+  if (!folderId.value) return 'Choose a library folder before generating.'
+  if (!queueReady.value) {
+    return shotScriptMode.value ? 'Each shot in the script needs a prompt.' : 'Each queued extension needs a prompt.'
+  }
+  return ''
 })
+const videoGenerateDisabled = computed(() => Boolean(videoBlockReason.value))
 const recommendDisabled = computed(() => {
   if (recommendBusy.value) return true
   if (!file.value || !prompt.value.trim()) return true
@@ -2236,6 +2270,10 @@ const editBlocked = computed(() => {
   return false
 })
 const editBlockReason = computed(() => {
+  if (!file.value) return 'Load a still first.'
+  if (!prompt.value.trim()) return 'Write an edit prompt first.'
+  if (!folderId.value) return 'Choose a library folder before editing.'
+  if (editPassQueue.value.some(item => !item.prompt.trim())) return 'Each extra pass needs a prompt.'
   if (!imageComfyConfigured.value && !comfyOk.value) return 'Image edit is not configured. Set COMFY_HOST.'
   if (!comfyOk.value && !imageComfyOk.value) return 'Desktop GPU is offline.'
   return ''
@@ -3287,6 +3325,7 @@ async function copyPrompt(text: string) {
 }
 
 function resetImage() {
+  if (preview.value) URL.revokeObjectURL(preview.value)
   file.value = null
   preview.value = ''
   imageWidth.value = 0
@@ -3311,6 +3350,7 @@ function clearVideoForm() {
 }
 
 function readFile(next: File, opts?: { keepThumbnailPref?: boolean }) {
+  if (preview.value) URL.revokeObjectURL(preview.value)
   file.value = next
   preview.value = URL.createObjectURL(next)
   if (!opts?.keepThumbnailPref) applyThumbnailDefault()
@@ -4421,11 +4461,11 @@ function clearPreview() {
   concealEditOutput.value = false
   editLockedSave.value = false
   if (!videoBusy.value) {
-    statusMessage.value = 'Waiting for a still.'
+    statusMessage.value = idleInputStatus('video')
     progress.value = 0
   }
   if (!editBusy.value) {
-    editStatusMessage.value = 'Waiting for a still.'
+    editStatusMessage.value = idleInputStatus('edit')
     editProgress.value = 0
   }
 }
@@ -4665,7 +4705,10 @@ function removeEditPass(id: string) {
 }
 
 async function editImage() {
-  if (!file.value || !prompt.value.trim()) return
+  if (!file.value || !prompt.value.trim()) {
+    toast(editBlockReason.value || 'Load a still first.')
+    return
+  }
   if (editPassQueue.value.some(item => !item.prompt.trim())) {
     toast('Each extra pass needs a prompt.')
     return
@@ -4757,6 +4800,7 @@ async function useEditAsInput() {
   if (!editResultUrl.value) return
   try {
     const blob = await $fetch<Blob>(editResultUrl.value, { responseType: 'blob' })
+    if (!blob || !blob.size) throw new Error('empty still')
     readFile(new File([blob], `${editDownloadName.value || 'edited'}.png`, { type: blob.type || 'image/png' }))
     toast('Edited still is now the input')
   } catch {
@@ -4796,9 +4840,8 @@ async function generate() {
     toast('LTX Pink Cherry is not available on this instance')
     return
   }
-  if ((!file.value && !textToVideo.value) || !prompt.value.trim()) return
-  if (!queueReady.value) {
-    toast(shotScriptMode.value ? 'Each shot in the script needs a prompt.' : 'Each queued extension needs a prompt.')
+  if (videoBlockReason.value) {
+    toast(videoBlockReason.value)
     return
   }
   if (!folderId.value) {