feat(adminui): S7 tag editor rejects wide-type and writable-Bool arrays at author time (#610)

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Uns/TagEditors/S7TagConfigModel.cs

@@ -112,6 +112,26 @@ public sealed class S7TagConfigModel
                 + string.Join(", ", Enum.GetNames<S7DataType>()) + ".";
         }
 
+        // S7-016: array shape is judged against the driver's INIT guards, which THROW (failing the whole
+        // driver's init, not just this tag) for a wide-type array and for a writable Bool array. The
+        // isArray / arrayLength keys themselves belong to the TagModal's generic array controls
+        // (TagArrayConfig) and are intentionally not fields of this model, so read them off the key bag.
+        if (TagConfigJson.GetBool(_bag, "isArray"))
+        {
+            var dt = DataType;
+            if (dt is S7DataType.Int64 or S7DataType.UInt64 or S7DataType.Float64
+                   or S7DataType.String or S7DataType.DateTime)
+            {
+                return $"S7 does not support {dt} arrays — use Bool (read-only), Byte, Int16, UInt16, Int32, "
+                    + "UInt32 or Float32 for an array tag, or a scalar tag.";
+            }
+            if (dt == S7DataType.Bool && (Writable ?? true))
+            {
+                return "A Bool array cannot be writable (a byte-granular write would clobber neighbouring bits) — "
+                    + "uncheck Writable, or use scalar Bool tags.";
+            }
+        }
+
         // Gitea #554: the reader's remaining, non-enum refusal — a String tag whose 'stringLength' is
         // negative or above 254 (S7 REJECTS it rather than clamping) — is not restated here. The verdict and
         // the wording both come from the driver's own reader, via TagConfigParseGate.