The setup-wasm-features function is the single source of truth for
resolving the renderer choice (URL param > profile preference > team
flags), storing the result in state[:features]. Several helpers were
re-deriving the same priority chain independently, duplicating logic:
- wasm-enabled?, wasm-url-override, wasm-url-override-ref
- enabled-by-flags?, enabled-without-migration?
This change removes all duplicated helpers and simplifies the
remaining functions to rely exclusively on the pre-computed
:features set:
- active-feature? — now just checks (contains? (:features state)
feature) without special-casing render-wasm/v1
- use-feature — uses the reactive features-ref for all features
- initialize/recompute-features effects — use the local features
binding directly
Since :features is rebuilt by setup-wasm-features on every
initialization and recompute, this preserves correctness while
eliminating ~50 lines of duplicated code.
