feat(web): info icon on every param with hover/click tooltip; add help text to all params

feat(web): responsive layout for phone and tablet (header stack, padding scale, seed-row wrap)

feat(web): seed control with -1=random + randomize button

feat(web): ParamsPanel splits params into basic + advanced disclosure

feat(web): editorial-studio visual polish — Fraunces serif, IBM Plex mono, warm dark, ember accents

feat(web): UI components — ParamsPanel, TagBar, ModelPicker, DeviceBadge, VoiceLibrary, HistoryList, VoiceComposer