answered quiz cards show the confidence rail — the slider's record form

The rail paint is extracted to components/confidence-rail.tsx (ramp, tick stack, geometry laws) and shared by both surfaces so they cannot drift: the dock's live slider paints the rail under its disc, the answered card renders it disc-less — the missing handle itself says 'record, not control'. Same look otherwise: thin rail, stop color, solid ticks, % read-out on the right, dock-mirrored placement (below the options, above the thinking). Renders only where a confidence exists: quiz answers with one sent; never on 'I don't know' (none was sent), never on explain/ask, never on pre-feature records (optional field, absent).
2026-10-02 01:21:12 +03:00
parent 1375295d54
commit 6da192bb22
4 changed files with 101 additions and 30 deletions
@@ -0,0 +1,61 @@
+import type { CSSProperties } from "react";
+import { cn } from "@/lib/utils";
+import { CONFIDENCE_STOPS } from "@/src/core";
+
+/**
+ * The confidence RAIL — the slider's paint, shared by two surfaces so they
+ * can never drift apart (owner, 2026-10-01):
+ *
+ *   - the dock's live slider (question-dock) — a transparent range input
+ *     rides on top of this paint, disc and all;
+ *   - the ANSWERED card (owner round 6) — the same rail with NO disc,
+ *     which itself communicates "this is a record, not a control".
+ *
+ * Geometry law: the rail spans the thumb-CENTER range (inset half a 16px
+ * disc per side) so the dock's 0/100 stops sit flush at the very ends.
+ * The static card has no thumb, but keeps the identical shape.
+ *
+ * Stack law: #141414 base (the darker main background), SOLID stop ticks
+ * as background layers UNDER the fill, and the fill itself TRANSPARENT
+ * past the value — so ticks show only on the empty side, never over the
+ * color. Ticks skip 0 and 100 (the rail's ends already say those).
+ */
+
+/** The six-step ramp (owner ruling): 0 red → 100 emerald, indexed by stop. */
+export const CONFIDENCE_COLORS: readonly string[] = [
+	"#ef4444", // 0
+	"#f97316", // 30
+	"#eab308", // 50
+	"#84cc16", // 70
+	"#22c55e", // 90
+	"#10b981", // 100
+];
+
+/** The rail's paint for a stop value (0–100). */
+export function confidenceRailStyle(value: number): CSSProperties {
+	const color = CONFIDENCE_COLORS[CONFIDENCE_STOPS.indexOf(value)] ?? CONFIDENCE_COLORS[2]!;
+	return {
+		backgroundColor: "#141414",
+		backgroundImage: [
+			`linear-gradient(90deg, ${color} 0%, ${color} ${value}%, transparent ${value}%, transparent 100%)`,
+			...[30, 50, 70, 90].map(
+				() => "linear-gradient(90deg, rgba(230,230,230,0.35), rgba(230,230,230,0.35))",
+			),
+		].join(", "),
+		backgroundSize: ["100% 100%", "1px 100%", "1px 100%", "1px 100%", "1px 100%"].join(", "),
+		backgroundPosition: ["0 0", ...[30, 50, 70, 90].map((p) => `${p}% 0`)].join(", "),
+		backgroundRepeat: "no-repeat",
+	};
+}
+
+/** The static rail — the slider's look, disc removed. */
+export function ConfidenceRail({ value, className }: { value: number; className?: string }) {
+	return (
+		<div
+			aria-hidden
+			data-testid="confidence-rail"
+			className={cn("h-1.5 w-full rounded-full border border-border", className)}
+			style={confidenceRailStyle(value)}
+		/>
+	);
+}