fix(core): format 95% CI as [lower to upper] to match the 1D plots

.changeset/ci-interval-to-format.md

@@ -0,0 +1,6 @@
+---
+'@boostv/process-optimizer-frontend-core': patch
+'@boostv/process-optimizer-frontend-plots': patch
+---
+
+Format 95% credible intervals as [lower to upper] instead of [lower, upper], matching the 1D plots' hover format. Applies to the pareto front hover label and the credible-interval column under the plots (the plots package inlines these helpers and is republished to pick up the change).

packages/core/src/common/util/scores/quality.test.ts

@@ -10,7 +10,7 @@ describe('displayQuality', () => {
 
 describe('displayQualityCI', () => {
   it('returns a 95% CI string from a negated value and std dev', () => {
-    expect(displayQualityCI(-2, 0.5)).toBe('[1.02, 2.98]')
+    expect(displayQualityCI(-2, 0.5)).toBe('[1.02 to 2.98]')
   })
 
   it('returns an empty string when value or stdDev is missing/zero', () => {

packages/core/src/common/util/scores/quality.ts

@@ -8,7 +8,7 @@ export const displayQualityCI = (value: number, stdDev: number): string => {
   }
   const lower = -value - 1.96 * stdDev
   const upper = -value + 1.96 * stdDev
-  return `[${lower.toFixed(2)}, ${upper.toFixed(2)}]`
+  return `[${lower.toFixed(2)} to ${upper.toFixed(2)}]`
 }
 
 // Cost is stored as-is (not negated), so its 95% CI is value ± 1.96·σ with no
@@ -19,5 +19,5 @@ export const displayCostCI = (value: number, stdDev: number): string => {
   }
   const lower = value - 1.96 * stdDev
   const upper = value + 1.96 * stdDev
-  return `[${lower.toFixed(2)}, ${upper.toFixed(2)}]`
+  return `[${lower.toFixed(2)} to ${upper.toFixed(2)}]`
 }