feat(proj): init

mobile/lib/core/config/env_file.dart

@@ -0,0 +1,41 @@
+/// Minimal `.env` parser (KEY=VALUE, `#` comments, optional quotes).
+///
+/// Kept tiny and dependency-free so config loading is easy to test and does
+/// not pull `flutter_dotenv` into the production graph.
+Map<String, String> parseEnvFile(String source) {
+  final values = <String, String>{};
+
+  for (final raw in source.split(RegExp(r'\r?\n'))) {
+    final line = raw.trim();
+    if (line.isEmpty || line.startsWith('#')) continue;
+
+    final separator = line.indexOf('=');
+    if (separator <= 0) continue;
+
+    final key = line.substring(0, separator).trim();
+    if (key.isEmpty) continue;
+
+    var value = line.substring(separator + 1).trim();
+    if (value.length >= 2) {
+      final quote = value[0];
+      if ((quote == '"' || quote == "'") && value.endsWith(quote)) {
+        value = value.substring(1, value.length - 1);
+      }
+    }
+
+    values[key] = value;
+  }
+
+  return values;
+}
+
+String normalizeUrl(String url) => url.trim().replaceAll(RegExp(r'/$'), '');
+
+bool parseEnvFlag(String? raw, {bool fallback = false}) {
+  if (raw == null || raw.trim().isEmpty) return fallback;
+  return switch (raw.trim().toLowerCase()) {
+    '1' || 'true' || 'yes' || 'on' => true,
+    '0' || 'false' || 'no' || 'off' => false,
+    _ => fallback,
+  };
+}