Radar axes: one canonical order everywhere

The dashboard fingerprints sorted score dimensions alphabetically
while the ticker page rendered them in API order, so the same ticker
drew a differently-shaped polygon on each page.

New shared helper radarAxesFromDimensions() pins the axis order to the
backend's DIMENSIONS list (technical, sr_quality, sentiment,
fundamental, momentum; unknown dimensions append alphabetically) and
centralizes the label truncation. Used by the dashboard fingerprint
strip, the ticker header radar, and ScoreCard.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

frontend/src/components/ui/ScoreCard.tsx

@@ -1,6 +1,6 @@
 import { useState } from 'react';
 import { DimensionBreakdownPanel } from '../ticker/DimensionBreakdownPanel';
-import { RadarChart } from '../charts/horizon';
+import { RadarChart, radarAxesFromDimensions } from '../charts/horizon';
 import type { DimensionScoreDetail, CompositeBreakdown } from '../../lib/types';
 
 interface ScoreCardProps {
@@ -97,14 +97,7 @@ export function ScoreCard({ compositeScore, dimensions, compositeBreakdown, show
               className={showComposite ? 'ml-auto' : 'mx-auto sm:mx-0'}
               title="Score fingerprint — hover a corner for the exact value"
             >
-              <RadarChart
-                axes={dimensions.map((d) => ({
-                  label: d.dimension.length > 9 ? `${d.dimension.slice(0, 8)}.` : d.dimension,
-                  full: d.dimension,
-                  value: d.score,
-                }))}
-                size={104}
-              />
+              <RadarChart axes={radarAxesFromDimensions(dimensions)} size={104} />
             </div>
           )}
         </div>