Fix spatial JSON parsing in spreadsheet editor

src/routes/(console)/project-[region]-[project]/databases/database-[database]/table-[table]/rows/columns/types/string.svelte

@@ -95,9 +95,20 @@
                 value = newArray as string[] | number[] | boolean[];
             }
         } else {
-            const parsedValue = isSpatialType(column)
-                ? JSON.parse(stringValue)
-                : parseValue(stringValue);
+            let parsedValue = parseValue(stringValue);
+
+            if (isSpatialType(column)) {
+                if (!stringValue?.trim()) {
+                    parsedValue = null;
+                } else {
+                    try {
+                        parsedValue = JSON.parse(stringValue);
+                    } catch {
+                        return;
+                    }
+                }
+            }
+
             if (JSON.stringify(parsedValue) !== JSON.stringify(value)) {
                 value = parsedValue;
             }