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/dark/theme.json

@@ -1,13 +1,25 @@
 {
   "name": "KDC Dark",
+  "$description": "Dark theme — lifted purple primary on near-black ink surface. Source: kdcvault dark overrides.",
   "colors": {
-    "surface.background": "#0B0D12",
-    "surface.subtle":     "#12151B",
-    "surface.muted":      "#1B1F27",
-    "text.default":       "#F7F8FA",
-    "text.muted":         "#B8BDC9",
-    "text.inverse":       "#111827",
-    "border.default":     "#2A2F3A",
-    "border.strong":      "#3A4150"
+    "surface.background": "#0E0B1A",
+    "surface.canvas":     "#14102A",
+    "surface.subtle":     "#1C1838",
+    "surface.muted":      "#2A2040",
+    "text.default":       "#F1ECFA",
+    "text.soft":          "#C8C0DA",
+    "text.muted":         "#8A82A0",
+    "text.disabled":      "#5A526E",
+    "text.inverse":       "#1A1530",
+    "text.brand":         "#A37CD9",
+    "border.default":     "#2A2D47",
+    "border.strong":      "#3D3A55",
+    "border.subtle":      "#1F1C36",
+    "accent.primary":     "#8456C2",
+    "accent.emphasis":    "#D9A858",
+    "status.success":     "#5BB58A",
+    "status.warning":     "#D9A858",
+    "status.danger":      "#D9695E",
+    "status.info":        "#A37CD9"
   }
 }