fix(idaa): resolve BB comment loop and parent mapping issues

- Switched to create_nested_obj_v3 for establishing parent-child links.
- Optimized background load trigger with untrack to prevent infinite loops.
- Resolved MySQL IntegrityError (missing post_id) during comment creation.
- Hardened view component reactivity for Svelte 5.

src/routes/idaa/(idaa)/bb/ae_idaa_comp__post_obj_id_view.svelte

@@ -30,16 +30,15 @@
     import Comp__post_comment_obj_id_edit from './ae_idaa_comp__post_comment_obj_id_edit.svelte';
     import AE_Comp_Hosted_Files_Download_Button from '$lib/ae_core/ae_comp__hosted_files_download_button.svelte';
 
-    let ae_promises: key_val = $state({});
+    import { untrack } from 'svelte';
 
     $effect(() => {
         const post_id = $idaa_slct.post_id;
-        if (post_id) {
+        if (post_id && post_id !== untrack(() => $idaa_trig.post_id)) {
             if (log_lvl) {
                 console.log(`Post ID selected: ${post_id}`);
-                console.log(`Post Object selected: `, $lq__post_obj);
             }
-            // Trigger background load
+            // Trigger background load only if it's a new ID
             $idaa_trig.post_id = post_id;
         }
     });