Fenil-Techy/brocaption — reverse-engineered prompt

Build me a simple but polished AI caption website called BroCaption. I want something people can open and use instantly with no account, just type their vibe or upload a photo and get social captions right away. It should help with everyday posts like selfies, vacations, family moments, friends, parties, celebrations, and similar stuff, and it should also suggest good hashtags.

Please add platform specific copy options for Instagram, TikTok, LinkedIn, X, and Facebook, including a character check for X and easy copy buttons. Let people save favorite captions in the browser, switch between dark and light mode, and make the whole UI feel modern, glassy, and smooth on mobile and desktop.

I also want lots of browseable category pages for caption niches, ideally around 1000 prebuilt pages for SEO, plus sitemap and robots support. When someone uploads a photo, use Gemini or OpenAI vision to understand the image and tailor the caption to the vibe. Make it feel complete and ready to deploy. Look up current docs online if you need to.