fix(audience): lowercase DistributionPlatform at Init (SDK-269)

src/Packages/Audience/Runtime/ImmutableAudience.cs

@@ -113,6 +113,13 @@ public static void Init(AudienceConfig config)
             if (string.IsNullOrEmpty(config.PersistentDataPath))
                 throw new ArgumentException("PersistentDataPath is required", nameof(config));
 
+            // Normalize casing so dashboards aggregate consistently. The
+            // DistributionPlatforms constants ship lowercase; a studio that
+            // passes "Steam" or "STEAM" would otherwise split rows from
+            // constant-using studios in the same project.
+            if (!string.IsNullOrEmpty(config.DistributionPlatform))
+                config.DistributionPlatform = config.DistributionPlatform.ToLowerInvariant();
+
             ConsentLevel consentAtInit;
             Session? sessionToStart;
             lock (_initLock)

src/Packages/Audience/Tests/Runtime/ImmutableAudienceTests.cs

@@ -1117,6 +1117,47 @@ public void Init_GameLaunch_IncludesDistributionPlatform()
                 c.Contains("\"game_launch\"") && c.Contains("\"steam\"")));
         }
 
+        [Test]
+        public void Init_LowercasesDistributionPlatform_WhenCallerPassesMixedCase()
+        {
+            var config = MakeConfig();
+            config.DistributionPlatform = "Steam";
+            ImmutableAudience.Init(config);
+
+            Assert.AreEqual("steam", config.DistributionPlatform,
+                "Init should lowercase mixed-case DistributionPlatform so dashboards aggregate consistently.");
+        }
+
+        [Test]
+        public void Init_LowercasesDistributionPlatform_WhenCallerPassesAllUpperCase()
+        {
+            var config = MakeConfig();
+            config.DistributionPlatform = "STEAM";
+            ImmutableAudience.Init(config);
+
+            Assert.AreEqual("steam", config.DistributionPlatform);
+        }
+
+        [Test]
+        public void Init_LeavesDistributionPlatformUnchanged_WhenAlreadyLowercase()
+        {
+            var config = MakeConfig();
+            config.DistributionPlatform = "steam";
+            ImmutableAudience.Init(config);
+
+            Assert.AreEqual("steam", config.DistributionPlatform);
+        }
+
+        [Test]
+        public void Init_LeavesDistributionPlatformNull_WhenNotSet()
+        {
+            var config = MakeConfig();
+            Assert.IsNull(config.DistributionPlatform);
+            ImmutableAudience.Init(config);
+
+            Assert.IsNull(config.DistributionPlatform);
+        }
+
         [Test]
         public void Init_ConsentNone_DoesNotFireGameLaunch()
         {