fix: show resolvedEndpointUri in info tab, reflect trace/tap state in toolbar

- Info tab now reads processor.resolvedEndpointUri instead of hardcoded "-"
- Toolbar buttons highlight in teal/purple when trace/tap is active
- Tooltip changes to "Disable tracing" / "Edit tap" when active

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

ui/src/components/ExecutionDiagram/tabs/InfoTab.tsx

@@ -80,7 +80,7 @@ export function InfoTab({ processor, executionDetail }: InfoTabProps) {
           <Field label="Duration" value={formatDuration(processor.durationMs)} mono />
 
           <Field label="Endpoint URI" value={processor.processorType} />
-          <Field label="Resolved URI" value="-" />
+          <Field label="Resolved URI" value={processor.resolvedEndpointUri ?? '-'} mono />
           <div />
         </div>
         <Attributes attrs={processor.attributes} />