fix(idaa): gate BB +page.ts fetch on novi_verified

Without this, +page.ts fires the API call before +layout.svelte
effects run, causing posts to be written to IDB after the purge.
Anonymous users (novi_verified=false) now return early with no fetch.
Cached verified sessions (within TTL) continue to load normally.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/routes/idaa/(idaa)/bb/+page.ts

@@ -4,6 +4,8 @@ console.log(`ae_idaa_bulletin_board [root] +page.ts start`);
 
 import { error } from '@sveltejs/kit';
 import { browser } from '$app/environment';
+import { get } from 'svelte/store';
+import { idaa_loc } from '$lib/stores/ae_idaa_stores';
 import { posts_func } from '$lib/ae_posts/ae_posts_functions';
 
 export const load = (async ({ params, parent }) => {
@@ -29,6 +31,14 @@ export const load = (async ({ params, parent }) => {
     }
 
     if (browser) {
+        // Auth gate: do not fetch or cache IDAA posts for unauthenticated users.
+        // +page.ts runs before +layout.svelte effects — without this check, the API call
+        // fires and writes to IDB before the layout's purge can run.
+        if (!get(idaa_loc).novi_verified) {
+            console.log('IDAA BB +page.ts: novi_verified=false — skipping post fetch.');
+            return data;
+        }
+
         const load_post_obj_li = posts_func
             .load_ae_obj_li__post({
                 api_cfg: ae_acct.api,