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/android_emu_battery.md

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+---
+name: android_emu_battery
+kind: function
+lang: bash
+domain: infra
+version: "1.0.0"
+purity: impure
+signature: "android_emu_battery([--serial <S>], level: int, [--charging <true|false>]) -> void"
+description: "Simulate battery state on emulator (level + charging). Emulator-only."
+tags: [android, emulator, battery, power]
+params:
+  - name: "--serial <S>"
+    desc: "Optional emulator serial (e.g. emulator-5554). Auto-detected if omitted."
+  - name: "level"
+    desc: "Battery level 0-100 to set via 'emu power capacity'."
+  - name: "--charging <true|false>"
+    desc: "AC charging state: true maps to 'on', false maps to 'off'. Omit to leave unchanged."
+output: "Stdout 'battery: <N>% [charging=...] on <serial>'. Exit 3 if no device found, exit 1 on other errors."
+uses_functions: [adb_wsl_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/android_emu_battery.sh"
+notes: "Util para tests bateria baja, modo ahorro energia. Solo funciona con emuladores (serial emulator-*), no con devices fisicos."
+---
+
+## Ejemplo
+
+```bash
+# Nivel al 15%, sin cambiar estado de carga
+android_emu_battery 15
+
+# Nivel al 5%, forzar descarga (AC off)
+android_emu_battery 5 --charging false
+
+# Nivel al 80%, forzar carga (AC on), emulador concreto
+android_emu_battery --serial emulator-5554 80 --charging true
+```
+
+## Notas
+
+Util para tests de bateria baja y modo ahorro de energia. Solo funciona con emuladores Android
+(serial debe empezar con `emulator-`). No aplica a dispositivos fisicos.
+
+Requiere que `adb_wsl.sh` este en el mismo directorio. El ADB se resuelve via
+`ANDROID_SDK_WIN` o la ruta por defecto de la instalacion Windows SDK.