fix: account_name not showing on events page — stale Dexie cache + duplicate assignment

Two Svelte-side bugs causing account_name to always show 'Account Name Not Set':

1. ae_core__site.ts: background site_domain refresh only pushed cfg_json back
   into $ae_loc after a stale cache hit. Now also pushes account_name and
   account_code when the store holds a placeholder value.

2. +layout.ts: duplicate ae_loc_init['account_name'] assignment at line ~475
   was overwriting the correct one at line ~385 with a different fallback string
   ('Account Name Not Set' vs 'Ghost Account'). Removed the duplicate.

Also includes user-intentional changes during testing:
- events/+page.svelte: typo fix ('You access' -> 'Your access'); Pres Mgmt /
  Launcher / Badges / Leads buttons now gated on trusted_access && edit_mode
- events/+page.ts: event list limit 25 -> 7
- events/[event_id]/+page.svelte: user edit

src/routes/events/+page.svelte

@@ -88,7 +88,7 @@ onMount(() => {
     </p>
 {:else if !$ae_loc.trusted_access}
     <h3 class="h4">Restricted Access</h3>
-    <p>You access to the presentation management system is limited.</p>
+    <p>Your access to the presentation management system is limited.</p>
 {/if}
 
 <!-- <Element_data_store
@@ -164,7 +164,7 @@ onMount(() => {
                                 Event Home
                             </a>
 
-                            {#if $ae_loc.trusted_access}
+                            {#if $ae_loc.trusted_access && $ae_loc.edit_mode}
                             <a
                                 href="/events/{event_obj.event_id}/pres_mgmt"
                                 class="btn btn-sm preset-tonal-secondary border-secondary-500 hover:preset-filled-secondary-500 border"