Now with JSON validity checking. Done for the day.

src/routes/core/person_view.svelte

@@ -43,6 +43,19 @@ $: if ($lq__person_obj?.data_json && ae_tmp.value__data_json === null) {
     // JSON.stringify(jsObj, null, 4);
 }
 
+ae_tmp.valid__data_json = null;
+$: if (ae_tmp.value__data_json && ae_tmp.value__data_json.length) {
+    console.log(`ae_tmp.value__data_json.length:`, ae_tmp.value__data_json.length);
+
+    try {
+        JSON.parse(ae_tmp.value__data_json);
+        ae_tmp.valid__data_json = true;
+    } catch (e) {
+        ae_tmp.valid__data_json = false;
+        console.error(`JSON.parse error:`, e);
+    }
+}
+
 
 // $events_slct.person_obj = $lq__person_obj;
 
@@ -553,13 +566,22 @@ onMount(() => {
             <!-- {/if} -->
         </div>
 
-        <p>JSON length: {(ae_tmp.value__data_json ? ae_util.number_w_commas(ae_tmp.value__data_json.length) : 0)} characters</p>
+        <p>
+            JSON length: {(ae_tmp.value__data_json ? ae_util.number_w_commas(ae_tmp.value__data_json.length) : 0)} characters
+
+            {#if ae_tmp.valid__data_json}
+            <span class="fas fa-check text-green-500"></span>
+            {:else}
+            <span class="fas fa-exclamation-triangle text-red-500"></span>
+            Invalid JSON
+            {/if}
+        </p>
 
         <div class="flex flex-wrap gap-2 p-1">
         <button
             type="button"
             class="btn btn-md variant-glass-primary hover:variant-filled-primary"
-            disabled={(ae_tmp.value__data_json == $lq__person_obj.data_json)}
+            disabled={(!$ae_loc.trusted_access || ae_tmp.value__data_json == $lq__person_obj.data_json)}
             on:click={() => {
                 console.log('*** Save button clicked ***');