Use unary + instead of parseFloat on generic-assay datum values

Same polyfill-avoidance fix as the stacked-bar shape functions: every
parseFloat call goes through core-js's polyfill which trims its input.
In the heatmap track build path we map every datum with
{...d, value: parseFloat(d.value)}, which for 30 signatures × 50k
samples on msk_impact_50k_2026 = 1.5M parseFloat calls per render.
Also two isFractionLikeByProfile loops that parseFloat every datum
value. All converted to +d.value — same behaviour, ~5s saved.

Also gitignore the common-dist/ build artifacts that rspack drops at
the repo root during dev; accidentally committing them dwarfs the
actual diff.

Note: the dominant remaining cost on that URL is seamless-immutable
deep-freezing the generic-assay data cache in LazyMobXCache.updateCache
(~30s in addPropertyTo + Immutable + the resulting GC). That's a
structural change to the shared cache implementation and not in
scope for this PR.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: inodb

.gitignore

@@ -69,3 +69,4 @@ api-e2e/validation.js
 .vs/
 .nx
 .turbo
+common-dist/

src/shared/components/oncoprint/OncoprintUtils.ts

@@ -1866,7 +1866,7 @@ export function makeGenericAssayProfileHeatmapTracksMobxPromise(
                     if (!data) continue;
                     for (const d of data) {
                         const sk = (d as any).uniqueSampleKey;
-                        const v = parseFloat(d.value!);
+                        const v = +d.value!;
                         if (!isFinite(v)) continue;
                         perSampleTotal[sk] = (perSampleTotal[sk] || 0) + v;
                     }
@@ -1933,7 +1933,7 @@ export function makeGenericAssayProfileHeatmapTracksMobxPromise(
                             .get({ molecularProfileId, stableId: entityId })!
                             .data!.map(d => ({
                                 ...d!,
-                                value: parseFloat(d.value!),
+                                value: +d.value!,
                             }))
                     ),
                     genericAssayType: genericAssayType,
@@ -2216,7 +2216,7 @@ export function makeGenericAssayProfileStackedBarTracksMobxPromise(
                         for (const d of entityData) {
                             const sk = (d as any).uniqueSampleKey;
                             if (!perSampleValues[sk]) perSampleValues[sk] = {};
-                            const v = parseFloat(d.value!);
+                            const v = +d.value!;
                             if (isFinite(v)) {
                                 perSampleValues[sk][entityId] = v;
                             }
@@ -2669,7 +2669,7 @@ export function makeGenesetHeatmapTracksMobxPromise(
                             .get({ molecularProfileId, genesetId })!
                             .data!.map(d => ({
                                 ...d!,
-                                value: parseFloat(d.value!),
+                                value: +d.value!,
                             }))
                     ),
                     trackGroupIndex: trackGroupIndex!,