refactor(kits): bump folder-card paper visibility without saturation hike

The paper tints had drifted into the "barely visible" band on both
themes. Bring them closer to the background's opposite L so the kind
hue actually reads, without bumping chroma:

- Light: L 0.94 → 0.90, alpha 0.85 → 0.95
- Dark:  L 0.27 → 0.32, alpha 0.82 → 0.95
- Light chroma 0.02 → 0.03 (one notch, to keep some hue against the
  pulled-down lightness).

Also bumps the selected-state dark wash from 0.05 → 0.08 so the
selection state is legible without re-introducing a primary-tinted
fill that would wash out the paper colors.

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

Author: RealZST

src/components/kits/folder-card.tsx

@@ -50,7 +50,12 @@ const PAPER_ORDER: Array<{
 // in index.css via `[data-slot]`.
 const SLOTS_BY_COUNT: Record<
   number,
-  Array<{ x: string; y: string; rot: string; slot: "left" | "right" | "center" }>
+  Array<{
+    x: string;
+    y: string;
+    rot: string;
+    slot: "left" | "right" | "center";
+  }>
 > = {
   1: [{ x: "0%", y: "-2%", rot: "0deg", slot: "center" }],
   2: [
@@ -93,8 +98,8 @@ export function FolderCard({
   // papers behind still bleed through; an earlier primary-tinted bg washed
   // the card and hid the paper hues).
   const selectedBodyClass = selected
-    ? "border-primary bg-card/40 dark:bg-white/[0.05]"
-    : "border-border bg-card/40 dark:border-transparent dark:bg-white/[0.05]";
+    ? "border-primary bg-card/40 dark:bg-white/[0.08]"
+    : "border-border bg-card/40 dark:border-transparent dark:bg-white/[0.08]";
 
   return (
     <div

src/index.css

@@ -83,8 +83,8 @@
   /* Kit folder papers: keep --kind-*'s hue, force a soft-pastel L/C.
      `oklch(from <c> L C H)` is CSS Color Level 5 (Chromium 119+ /
      Safari 16.4+ / Firefox 128+). Dark override below. */
-  --paper-skill: oklch(from var(--kind-skill) 0.94 0.02 h / 0.85);
-  --paper-mcp: oklch(from var(--kind-mcp) 0.94 0.02 h / 0.85);
+  --paper-skill: oklch(from var(--kind-skill) 0.90 0.03 h / 0.95);
+  --paper-mcp: oklch(from var(--kind-mcp) 0.90 0.03 h / 0.95);
   --paper-config: oklch(0.93 0.005 260 / 0.9);
   --tag-global: oklch(0.5144 0.1605 267.44);
   --tag-project: oklch(0.48 0.08 175);
@@ -185,8 +185,8 @@
   /* Dark paper: low L (0.24) keeps papers in the "deep tone" band, low C
      (0.04) gives a hint of hue without making them feel saturated, alpha
      0.82 softens the color into the bg so papers recede rather than pop. */
-  --paper-skill: oklch(from var(--kind-skill) 0.27 0.03 h / 0.82);
-  --paper-mcp: oklch(from var(--kind-mcp) 0.27 0.03 h / 0.82);
+  --paper-skill: oklch(from var(--kind-skill) 0.32 0.03 h / 0.95);
+  --paper-mcp: oklch(from var(--kind-mcp) 0.32 0.03 h / 0.95);
   --paper-config: oklch(0.27 0 0 / 0.82);
   --tag-global: oklch(0.72 0.12 267.44);
   --tag-project: oklch(0.68 0.07 175);