Holding an arrow key on a selection with a fast OS key-repeat rate
crashed the workspace with React error #185 (Maximum update depth
exceeded): each OS key-repeat event was converted 1:1 into a
`set-modifiers`/`set-wasm-modifiers` store write inside
`nudge-selected-shapes` with no throttle, starving the renderer.
The sibling mouse-driven resize/rotate/move paths got an `rx/sample`
throttle in PR #10560; the keyboard-nudge path was the only transform
stream left un-throttled. This change applies the same `rx/sample`
throttle to the nudge stream, mirroring the drag-path structure, and
adds a regression test guarding the final committed position
invariant under a burst of 20 `move-selected` events for both the WASM
and legacy (non-WASM) branches.
Closes#10726
AI-assisted-by: glm-5.2
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.
