fix(telemetry-strip): use real activity events from /api/activity + SSE

TelemetryStrip now fetches from the same /api/activity endpoint and
subscribes to the same /api/events SSE stream as ActivityPanel. The
minimized dots use getEventTone() colors matching the full feed exactly
(created=green, closed=amber, reopened=blue, etc.) instead of derived
task status counts.

Co-Authored-By: Oz <oz-agent@warp.dev>

src/components/shared/unified-shell.tsx

@@ -291,7 +291,7 @@ export function UnifiedShell({
           </div>
           {isNonTelemetry && (
             <TelemetryStrip
-              issues={issues}
+              projectRoot={projectRoot}
               onMaximize={() => { setTaskId(null); setAssignMode(false); }}
             />
           )}