feat(kotlin-compose): design system + 33 components + gallery_kt + e2e android emulator + scaffolder fixes

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

bash/functions/infra/gradle_clean.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+# gradle_clean — Limpia build artifacts de un proyecto Android.
+#
+# Uso como libreria: source bash/functions/infra/gradle_clean.sh
+# Uso directo:       bash bash/functions/infra/gradle_clean.sh <project_dir>
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=./gradle_run.sh
+source "$SCRIPT_DIR/gradle_run.sh"
+
+# ---------------------------------------------------------------------------
+# gradle_clean <project_dir>
+#
+# Ejecuta `gradlew clean` en el proyecto y luego elimina los directorios
+# de cache .gradle y build (best-effort).
+#
+# Exits:
+#   0  — gradle clean exitoso (los rm son best-effort, no afectan exit code)
+#   *  — exit code propagado de gradle_run / gradlew
+# ---------------------------------------------------------------------------
+gradle_clean() {
+    local project_dir="$1"
+
+    gradle_run "$project_dir" "clean" || return $?
+
+    # Best-effort: eliminar caches locales; ignorar errores si no existen
+    rm -rf "${project_dir}/.gradle" 2>/dev/null || true
+    rm -rf "${project_dir}/build"   2>/dev/null || true
+
+    return 0
+}
+
+# ---------------------------------------------------------------------------
+# Ejecucion directa
+# ---------------------------------------------------------------------------
+if [[ "${BASH_SOURCE[0]}" == "$0" ]]; then
+    gradle_clean "$@"
+fi