Resolves the AiPostWizard conflict and completes the feature:
- i18n parity: brand_colors_label + brand_colors_description in all 15 locales
(was en/es/pt-BR only, which broke LocalizationParityTest).
- Reworked the two-button toggle into a Switch with an explanatory description
(matches the settings Switch/card pattern).
- Only shown for templates that honor the flag: added appliesBrandVisuals() to
the AiContentTemplate contract (ImageCard=true, tweet cards=false), exposed as
applies_brand_visuals in the create-page DTO, and gated the toggle on it — so
it no longer appears (as a no-op) for tweet-card styles.
- Tests: TemplateContractTest covers appliesBrandVisuals for all templates.
Replace the 'single'/'carousel' string format threaded through the AI
generation path with a typed GeneratorFormat enum (PostContentGenerator,
PostContentHumanizer, PostContentStreamer, StreamPostCreation,
RunGenerateNode, deriveFormat).
Remove generatorFormat() from AiContentTemplate and the three templates —
it conflated style and format (returning 'tweet_card'). The tweet-card
check now lives on ContentStyle via isTweetCard(), and the humanizer skip
on ContentStyle::humanizes(), so the style declares its own behaviour
instead of callers comparing magic strings.
- TemplateContext gains bool $isCarousel (set from format === CAROUSEL_FORMAT in StreamPostCreation)
- AiContentTemplate interface: promptView() now takes TemplateContext
- ImageCardTemplate handles both single and carousel via context.isCarousel; schema() returns the correct shape per mode; assemble() routes to assembleSingle/assembleCarousel
- TweetCardTemplate handles both single and carousel; promptView() returns tweet_card_carousel view when isCarousel; schema() returns {tweet_text} or {caption, slides[]}; assemble() calls forTweetCard (single) or forTweetCardCarousel (carousel)
- CarouselTemplate deleted — carousel is now a format dimension each style handles, not a standalone style
- AiTemplateRegistry: [ImageCardTemplate, TweetCardTemplate] only
- PostImagePipeline: adds forTweetCardCarousel — renders one renderTweetCard per slide text, returns N media items
- StreamPostCreation: carousel detection restored to $format === CAROUSEL_FORMAT (like main); style dispatched via AiTemplateRegistry::find($this->template); humanize skips tweet_card (single and carousel)
- PostContentGenerator: promptView() call updated to pass templateContext
- New prompt: resources/views/prompts/post_content/tweet_card_carousel.blade.php
- Tests: TemplateContractTest and TweetCardTemplateTest updated for promptView(context) signature; AiTemplateRegistryTest asserts [image_card, tweet_card]; StreamPostCreationTest adds tweet_card carousel test; TweetCardTemplateTest covers both schema shapes and both promptView return values
