Add an opt-out `normalize` flag to the four magnitude value sources
(ha_entity, http, system_metrics, game_event). get_value() stays in
[0,1] for every source (the normalized scalar-bus invariant), so all
existing consumers — brightness sinks, gradient_map, template `name`
bindings, and color-strip bindable floats — are unaffected.
- normalize=False is a clamp-passthrough: skip the min/max rescale and
clamp the raw reading into [0,1] (for sources already reporting a
0..1 fraction). The un-normalized magnitude stays available via
get_raw_value() / template raw[name] / automations.
- Add get_raw_value() + a raw channel to GameEventValueStream (it had
none). game_event's flag is model/stream-level only (no CRUD schema).
- Finite-safe clamp01() util; harden the composite-layer brightness
multiply (latent negative-wrap / >=1 skip) with it.
- Preview WebSocket: tolerate non-numeric raw, generalize raw-range.
- Frontend: settings-toggle slider per HA/system_metrics/http editor
with min/max grey-out; toggle hidden for fixed-mapping percent
metrics. en/ru/zh locale keys.
- Additive optional field (default True) — JSON round-trip, no migration.
Tests: store create/update round-trip, clamp-passthrough, live
normalize flip, game_event raw channel + build_stream forwarding,
and finite-safe clamp01.
alexei.dolgolyov
669ae20824