feat(input): assess world objects on right click

Port SmartBox's release-completed sr_Examine gesture through the configurable SelectRight binding. Cancel camera drags at the shared retail three-pixel threshold, then reuse the canonical picker, selection pulse, and appraisal request path without inventing another wire or UI owner.

Co-authored-by: Codex <codex@openai.com>

tests/AcDream.App.Tests/Input/GameplayInputActionRouterTests.cs

@@ -70,6 +70,21 @@ public sealed class GameplayInputActionRouterTests
             harness.Targets.Calls);
     }
 
+    [Fact]
+    public void Click_PassesGateToSelection()
+    {
+        var harness = new Harness("selection");
+        harness.Router.Attach();
+
+        harness.Actions.Raise(
+            InputAction.SelectRight,
+            ActivationType.Click);
+
+        Assert.Equal(
+            ["pointer", "combat", "retained", "selection"],
+            harness.Targets.Calls);
+    }
+
     [Fact]
     public void Attach_SeedsAndTracksCombatScopes()
     {