* update date-fns, i18next, react-dropzone, react-markdown and @types/node
react-i18next 17 peers `i18next >= 26.2.0`, so the two move together. react-day-picker already depends on date-fns 4, so date-fns now dedupes to a single copy. react-dropzone 20 declares `node >=22` in `engines`, but npm only warns on Node 20 and nothing in the build needs Node 22.
* update js-yaml, @hookform/resolvers and prettier
js-yaml 5 has no default export, so `DictAsYamlField` imports `dump`, `load` and `YAMLException` by name. @hookform/resolvers 5 types `zodResolver` with the schema's input and output types separately, and fields with defaults are optional on input, so the zone and classification model forms pass both types to `useForm`. zod's range now starts at 3.25, which resolvers 5 requires.
* format with prettier 3.9
* add sub stream recording with adaptive quality playback
Optionally record a second, lower bitrate stream alongside the main
recording stream via a `record_sub` input role and `record.sub` config block, with its own retention windows.
Recordings rows now carry the stream type plus the media details needed to serve both streams from one manifest: video codec, audio presence, audio codec and rate, and a record-time keyframe index.
Playback resolves coverage across both streams and merges them into a single VOD sequence, falling back to a discontinuity manifest with per-clip init segments when the media signatures differ. The player exposes a quality selector, and an auto governor picks the stream from stall time, bandwidth, codec support, and the save-data hint.
* fix tests and i18n
