refactor: rename ae_hide_menu URL param to hide_menu

ae_ prefix belongs on Svelte component/variable names, not URL params.
Updated both the consumer (+layout.svelte) and the builder (jitsi_url_builder).

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

src/routes/idaa/(idaa)/jitsi_reports/ae_idaa_comp__jitsi_url_builder.svelte

@@ -68,7 +68,7 @@
         if (disable_reaction) p.set('reaction_sound', 'true');
         if (disable_raise_hand) p.set('raise_hand_sound', 'true');
         // AE embed option: hide AE system menu when embedding in other pages
-        if (hide_ae_menu) p.set('ae_hide_menu', 'true');
+        if (hide_ae_menu) p.set('hide_menu', 'true');
         return `${effective_base}?${p.toString()}`;
     });
 
@@ -231,7 +231,7 @@
                 />
                 <span class="text-xs"
                     >Hide AE system menu <span class="opacity-40"
-                        >(ae_hide_menu=true)</span
+                        >(hide_menu=true)</span
                     ></span
                 >
             </label>