Add app source and tests

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

lib/Peach/see/redis/ConnectRedis.dart

@@ -0,0 +1,36 @@
+import '../../about/external/data/Redis.dart';
+
+/// One scan's worth of results — the key list plus the context needed to
+/// label it (per-database counts, DBSIZE, and per-key types when filtering).
+class RedisScan {
+  final int databaseCount;
+  final Map<int, int> databaseCounts;
+  final int total;
+  final List<String> keys;
+  final Map<String, String> keyTypes;
+
+  const RedisScan({
+    required this.databaseCount,
+    required this.databaseCounts,
+    required this.total,
+    required this.keys,
+    required this.keyTypes,
+  });
+}
+
+abstract class ConnectRedis {
+  /// A scan completed.
+  void onScanned(RedisScan scan);
+
+  /// The scan couldn't run; [message] is already phrased for the user.
+  void onScanFailed(String message);
+
+  /// A password was read out of the server's redis.conf.
+  void onPasswordDetected(String password);
+
+  /// No `requirepass` was present in redis.conf.
+  void onPasswordMissing();
+
+  /// One key's value was read.
+  void onValueLoaded(RedisEntry entry);
+}