Remove index.html files

Makefile

@@ -27,6 +27,7 @@ clean:
 	@echo "Cleaning build artifacts..."
 	rm -f s3-genindex
 	rm -f coverage.out coverage.html
+	find . -name index.html -delete
 	@echo "Clean complete"
 
 # Wipe everything including test caches
@@ -86,4 +87,4 @@ help:
 	@echo "  lint          - Lint code (requires golangci-lint)"
 	@echo "  check         - Run fmt, vet, lint, and test"
 	@echo "  bench         - Run benchmarks"
-	@echo "  help          - Show this help message"
+	@echo "  help          - Show this help message"