fix: Restrict returnRoute (login redirection) handling to web

Co-authored-by: Eli Mallon <eli@stream.place>

feat: clear login errors after showing them

feat: add branding tags on web

feat: Separate developer docs from viewer/streamer docs

fix: remove stream viewers from header as it's just duplicate data

fix: support all ATProto lexicon datetime formats in aqtime

fix: explicitly disable autofill unless wanted

fix: offset 'scroll to bottom' when closed to not interfere with chat

feat: add a "stop stream" button

FromString now uses time.Parse with RFC3339Nano as the primary parser,
falling back to regex only for the file-safe variant. Adds rejection of
-00:00 offsets and datetimes that normalize to negative years. Tests
cover all valid and invalid examples from the ATProto spec.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

fix: mute param works now

fix: use url field on livestream directly

feat: signup pds picker

oatproxy: add aqhttp *http.Client

localdb: move segments and thumbnails to their own database

Fix char limit chat

media: temporarily comment out flaky rtcrec tests