feat: add /process_url_session API endpoint for URL-based alignment

docs: update changelog and fix API docs TOC;fix: polish input UI — inline errors, example waveform, scrollbar

docs: add changelog system — user-facing, API, and technical;feat: improve URL input UX — audio player, domain warnings, smart extract button

docs: update timestamps API

Add token parameter

Update Client API

Update API doc

Reorganize client API docs with table of contents and grouped sections

Remove remaining technical jargon from client API docs

Simplify client API docs and rename endpoints

Add estimate duration API

Replace midpoint split with MFA-based splitting for combined/fused segments

Update timestamps API

Add timestamps API endpoints

Fix special segments (Basmala/Isti'adha) not sent to MFA or animated in mega card

Skip false missing-words flags across chapter boundaries and document special_type API field

Fix client API docs/impl consistency and add GPU fallback warning

Update docs

Add client API