fix(preview): map click failures from tagged errors only

Host mapping still accepted a failureKind field on
PreviewAutomationTargetNotFoundError. Nothing emits that shape.
Classification now uses the hidden, disabled, and ambiguous tags only.

Author: gbarros-dev

apps/web/src/components/preview/previewAutomationErrors.test.ts

@@ -25,17 +25,14 @@ describe("PreviewAutomationOperationError", () => {
       ...context,
       cause: { _tag: "PreviewAutomationTargetAmbiguousError", matchCount: 3 },
     });
-    const legacyHidden = PreviewAutomationOperationError.fromCause({
+    const missing = PreviewAutomationOperationError.fromCause({
       ...context,
-      cause: {
-        _tag: "PreviewAutomationTargetNotFoundError",
-        failureKind: "hidden",
-      },
+      cause: { _tag: "PreviewAutomationTargetNotFoundError" },
     });
     expect(hidden.message).toContain("not visible");
     expect(disabled.message).toContain("disabled");
     expect(ambiguous.message).toContain("matched 3 elements");
-    expect(legacyHidden.message).toContain("not visible");
+    expect(missing.message).toContain("could not find a target");
     expect(hidden.message).not.toContain("secret");
     expect(disabled.message).not.toContain("secret");
     expect(ambiguous.message).not.toContain("secret");

apps/web/src/components/preview/previewAutomationErrors.ts

@@ -150,16 +150,8 @@ const readTargetLookupKind = (
   if (cause._tag === "PreviewAutomationTargetHiddenError") return "hidden";
   if (cause._tag === "PreviewAutomationTargetDisabledError") return "disabled";
   if (cause._tag === "PreviewAutomationTargetAmbiguousError") return "ambiguous";
-  if (cause._tag !== "PreviewAutomationTargetNotFoundError") return null;
-  if (
-    "failureKind" in cause &&
-    (cause.failureKind === "hidden" ||
-      cause.failureKind === "disabled" ||
-      cause.failureKind === "ambiguous")
-  ) {
-    return cause.failureKind;
-  }
-  return "missing";
+  if (cause._tag === "PreviewAutomationTargetNotFoundError") return "missing";
+  return null;
 };
 
 const readAmbiguousMatchCount = (cause: unknown): number => {

apps/web/src/components/preview/previewAutomationRequestConsumer.test.ts

@@ -322,8 +322,7 @@ describe("previewAutomationRequestConsumer", () => {
       JSON.stringify(
         serializePreviewAutomationError(
           {
-            _tag: "PreviewAutomationTargetNotFoundError",
-            failureKind: "hidden",
+            _tag: "PreviewAutomationTargetHiddenError",
             selector: "role=button[name='target-secret']",
           },
           {