chore: import upstream snapshot with attribution

scripts/wait-for-api.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+# Wait for the API to be healthy before starting the frontend
+# This prevents the "Unable to Connect to API Server" error during startup
+# POSIX-compliant so it runs with /bin/sh (dash) in slim images
+
+API_URL="${INTERNAL_API_URL:-http://localhost:5055}"
+MAX_RETRIES=60
+RETRY_INTERVAL=5
+i=0
+
+echo "Waiting for API to be ready at ${API_URL}/health..."
+
+while [ $i -lt $MAX_RETRIES ]; do
+    if curl -s -f "${API_URL}/health" > /dev/null 2>&1; then
+        echo "API is ready! Starting frontend..."
+        exit 0
+    fi
+    i=$((i + 1))
+    echo "Attempt $i/$MAX_RETRIES: API not ready yet, waiting ${RETRY_INTERVAL}s..."
+    sleep $RETRY_INTERVAL
+done
+
+echo "ERROR: API did not become ready within $((MAX_RETRIES * RETRY_INTERVAL)) seconds"
+echo "Starting frontend anyway - users may see connection errors initially"
+exit 0  # Exit 0 so frontend still starts (better than nothing)