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): make ProgressBar sticky to top of viewport during generation

feat(web): footer credit — Made with ♥ by techfreakworm

feat(web): ProgressBar — determinate (Dialog) and indeterminate (Single)

feat(web): DialogComposer — speaker slots, engine radio, script + params

feat(web): ModeToggle (Single/Dialog) and SpeakerSlot components

feat(web): IndexedDB v2 migration; show seed and reuse button on history rows

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

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

feat(web): play/stop button on each voice card; one plays at a time

fix: re-encode reference voices as PCM WAV in browser; expand turbo tag list to 9

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

feat(web): Studio composes generate flow + SSE-driven loading banner

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