Extend Prompt Builder with sequence characters, outfits, and scene toggles.

Characters live on the sequence with per-scene on/off and outfit picks; Copy scene exports only the active tab; legacy saves still open.

server/api/prompt-sequences.post.ts

@@ -4,11 +4,13 @@ export default defineEventHandler(async (event) => {
   const { owner } = assertLibraryOwner(event)
   const body = await readBody<{
     name?: string
+    characters?: unknown
     scenes?: unknown
     overwrite?: boolean
   }>(event).catch(() => ({}))
   const sequence = await savePromptSequence(owner, {
     name: body?.name || '',
+    characters: body?.characters,
     scenes: body?.scenes,
     overwrite: body?.overwrite === true
   })