Fix WCAG AA color contrast violations across all pages

Replace incorrect perceived-brightness formula in Stats progress bars
with proper WCAG relative luminance calculation, and convert type bar
colors to hex values for reliable contrast detection. Add light: variant
classes to status badges, yellow/purple text, and admin nav links across
17 files. Darken light-mode status-active token and text-tertiary/muted
tokens. Add aria-labels to admin filter selects and flex-wrap for mobile
overflow on AdminEvolutions.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

frontend/src/pages/GenlockeDetail.tsx

@@ -18,9 +18,9 @@ const statusRing: Record<RunStatus, string> = {
 }
 
 const statusStyles: Record<RunStatus, string> = {
-  active: 'bg-green-900/40 text-green-300',
-  completed: 'bg-blue-900/40 text-blue-300',
-  failed: 'bg-red-900/40 text-red-300',
+  active: 'bg-green-900/40 text-green-300 light:bg-green-100 light:text-green-800',
+  completed: 'bg-blue-900/40 text-blue-300 light:bg-blue-100 light:text-blue-800',
+  failed: 'bg-red-900/40 text-red-300 light:bg-red-100 light:text-red-800',
 }
 
 function LegIndicator({ leg }: { leg: GenlockeLegDetail }) {
@@ -270,7 +270,7 @@ export function GenlockeDetail() {
             className={`px-4 py-2 rounded-lg font-medium transition-colors ${
               showGraveyard
                 ? 'bg-red-600 text-white hover:bg-red-700'
-                : 'bg-surface-3 text-text-secondary hover:bg-surface-4'
+                : 'bg-surface-3 text-text-secondary light:text-text-primary hover:bg-surface-4'
             }`}
           >
             Graveyard
@@ -280,7 +280,7 @@ export function GenlockeDetail() {
             className={`px-4 py-2 rounded-lg font-medium transition-colors ${
               showLineage
                 ? 'bg-accent-600 text-white hover:bg-accent-500'
-                : 'bg-surface-3 text-text-secondary hover:bg-surface-4'
+                : 'bg-surface-3 text-text-secondary light:text-text-primary hover:bg-surface-4'
             }`}
           >
             Lineage