Add comprehensive technical specification for Movie Creator Web App#1

mythz merged 1 commit intomainNetCoreApps/ubimovie.com:mainfrom

claude/movie-creator-app-01TCxJUzMZCzANpeDVF6jwZ3NetCoreApps/ubimovie.com:claude/movie-creator-app-01TCxJUzMZCzANpeDVF6jwZ3Copy head branch name to clipboard