Segunda revisión completa: fixes críticos aplicados

- StrictMode solo en DEBUG mode
- ExecutorService con shutdown apropiado
- DNSSetter NetworkCallback unregister
- DiffUtil en ChannelAdapter y EventAdapter
- minifyEnabled=true y shrinkResources=true para release
- Validación en constructores (StreamChannel)
- Strings externalizadas
- ProGuard rules completas
- Testing dependencies agregadas
- Removed Firebase (uso personal)
- JavaDoc documentación agregada
- Android SDK configurado localmente

Compilado exitosamente: StreamPlayer v9.4.2 debug APK (11MB)

dashboard/node_modules/ignore-by-default/index.js

@@ -0,0 +1,12 @@
+'use strict'
+
+exports.directories = function () {
+  return [
+    '.git', // Git repository files, see <https://git-scm.com/>
+    '.nyc_output', // Temporary directory where nyc stores coverage data, see <https://github.com/bcoe/nyc>
+    '.sass-cache', // Cache folder for node-sass, see <https://github.com/sass/node-sass>
+    'bower_components', // Where Bower packages are installed, see <http://bower.io/>
+    'coverage', // Standard output directory for code coverage reports, see <https://github.com/gotwarlost/istanbul>
+    'node_modules' // Where Node modules are installed, see <https://nodejs.org/>
+  ]
+}