feat: add multi-flow support to RouteFlow via flows prop

Allow rendering multiple named flow segments (e.g., main route +
onException handler) within a single RouteFlow component. Each segment
gets a labeled section with variant-based color theming. Fully backward
compatible — existing nodes prop continues to work unchanged.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/pages/Inventory/sections/CompositesSection.tsx

@@ -815,6 +815,37 @@ export function CompositesSection() {
           </div>
         </DemoCard>
 
+        {/* 17c. RouteFlow (Multi-Flow) */}
+        <DemoCard
+          id="routeflow-multi"
+          title="RouteFlow (Multi-Flow)"
+          description="Multiple flow segments with labels, showing a main route alongside an exception handler."
+        >
+          <div style={{ width: '100%', maxWidth: 360 }}>
+            <RouteFlow
+              flows={[
+                {
+                  label: 'Main Route',
+                  nodes: [
+                    { name: 'jms:orders', type: 'from', durationMs: 4, status: 'ok' },
+                    { name: 'OrderValidator', type: 'process', durationMs: 8, status: 'ok' },
+                    { name: 'http:payment-api/charge', type: 'to', durationMs: 187, status: 'slow' },
+                    { name: 'kafka:order-completed', type: 'to', durationMs: 11, status: 'ok' },
+                  ],
+                },
+                {
+                  label: 'onException(IOException)',
+                  variant: 'error',
+                  nodes: [
+                    { name: 'log:error-logger', type: 'process', durationMs: 2, status: 'ok' },
+                    { name: 'dead-letter:failed-orders', type: 'to', durationMs: 14, status: 'fail' },
+                  ],
+                },
+              ]}
+            />
+          </div>
+        </DemoCard>
+
         {/* 18. ShortcutsBar */}
         <DemoCard
           id="shortcutsbar"