feat: design system v1.0.0 — reconcile tokens from cross-repo audit

Extracted real production usage from 8 KDC repos and consolidated the
consensus (kdcsurveyadd / kdcvault / kdc_void_planner) into the canonical
design.md + tokens.

Highlights:
- brand.ink #000000 -> #1A1530 (purple-tinted, matches real usage)
- brand.canvas #F5F4F0 -> #F7F4ED (warm)
- neutral ramp rebuilt around ink (purple-tinted, not cold slate)
- semantic palette retuned for warm canvas + soft tints
- elevation shadows retinted with brand-ink rgb
- new accent.gold (product) and accent.mint (marketing) tokens
- real themes/light, themes/dark, themes/high-contrast
- fleshed out every component + foundation README
- docs/consolidation-2026-05.md captures the full audit + drift inventory

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

themes/high-contrast/theme.json

@@ -1,13 +1,25 @@
 {
   "name": "KDC High Contrast",
+  "$description": "WCAG AAA-targeted theme. Pure black/white with brand purple preserved as the only chromatic accent.",
   "colors": {
     "surface.background": "#000000",
-    "surface.subtle":     "#000000",
-    "surface.muted":      "#0A0A0A",
+    "surface.canvas":     "#000000",
+    "surface.subtle":     "#0A0A0A",
+    "surface.muted":      "#141414",
     "text.default":       "#FFFFFF",
+    "text.soft":          "#FFFFFF",
     "text.muted":         "#EDEFF3",
+    "text.disabled":      "#B8BDC9",
     "text.inverse":       "#000000",
+    "text.brand":         "#C7A6E8",
     "border.default":     "#FFFFFF",
-    "border.strong":      "#FFFFFF"
+    "border.strong":      "#FFFFFF",
+    "border.subtle":      "#FFFFFF",
+    "accent.primary":     "#C7A6E8",
+    "accent.emphasis":    "#FFD27A",
+    "status.success":     "#7AE0A0",
+    "status.warning":     "#FFD27A",
+    "status.danger":      "#FF8A8A",
+    "status.info":        "#A6D8FF"
   }
 }