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_screenshot_test.md

@@ -0,0 +1,58 @@
+---
+name: gradle_screenshot_test
+kind: function
+lang: bash
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "gradle_screenshot_test(project_dir: string, module: string, flag: string) -> int"
+description: "Corre screenshot tests Roborazzi de Composables (JVM, no necesita emulador)."
+tags: [android, gradle, test, compose, roborazzi, screenshot]
+params:
+  - name: project_dir
+    desc: "Raiz del proyecto Android (debe contener gradlew)"
+  - name: module
+    desc: "Modulo Gradle a testear. Default: app"
+  - name: --record
+    desc: "Re-grabar goldens en lugar de verificar"
+output: "Stdout build log. Si verify y diff: linea 'DIFF: <path>'. Si record: linea 'RECORDED: <path>'. Exit 0 OK, 1 mismatch."
+uses_functions: [gradle_run_bash_infra]
+uses_types: []
+returns: []
+returns_optional: false
+error_type: "error_go_core"
+imports: []
+tested: false
+tests: []
+test_file_path: ""
+file_path: "bash/functions/infra/gradle_screenshot_test.sh"
+notes: "Roborazzi corre en JVM (Robolectric) — rapido, no necesita emulador. Goldens viven en src/test/snapshots/ y se commitean al repo. App debe declarar plugin io.github.takahirom.roborazzi en build.gradle.kts."
+---
+
+## Ejemplo
+
+```bash
+# Verificar screenshots (modo CI)
+bash bash/functions/infra/gradle_screenshot_test.sh /path/to/MyApp
+
+# Modulo no-default
+bash bash/functions/infra/gradle_screenshot_test.sh /path/to/MyApp feature_login
+
+# Re-grabar goldens tras cambio de UI intencional
+bash bash/functions/infra/gradle_screenshot_test.sh /path/to/MyApp app --record
+```
+
+## Salida
+
+| Situacion | Salida |
+|-----------|--------|
+| Verify OK | log de Gradle, exit 0 |
+| Verify FAIL | log + `DIFF: <project>/<module>/build/outputs/roborazzi/`, exit 1 |
+| Record OK | log + `RECORDED: <project>/<module>/src/test/snapshots/`, exit 0 |
+
+## Notas
+
+Source-able y ejecutable directo. Sourcear `gradle_run.sh` resuelve JAVA_HOME y ANDROID_HOME de forma identica al resto de funciones `gradle_*`.
+
+Los diffs en `build/outputs/roborazzi/` muestran imagen original, imagen actual e imagen de diferencia. Util para revisar regresiones visuales antes de hacer `--record`.
+---