fix: evitar uso de document en SSR en Popover.svelte

Co-authored-by: aider (openrouter/openai/gpt-5) <aider@aider.chat>

apps/web/src/lib/ui/feedback/Popover.svelte

@@ -1,6 +1,7 @@
 <script lang="ts">
   import { tick, onDestroy } from 'svelte';
   import { createEventDispatcher } from 'svelte';
+  import { browser } from '$app/environment';
 
   export let open: boolean = false;
   export let ariaLabel: string = 'Diálogo';
@@ -47,20 +48,26 @@
   }
 
   $: if (open) {
+    if (browser) {
       lastActive = document.activeElement;
       tick().then(() => {
         panelEl?.focus();
         document.body.style.overflow = 'hidden';
       });
+    }
   } else {
+    if (browser) {
       document.body.style.overflow = '';
       if (lastActive instanceof HTMLElement) {
         tick().then(() => lastActive?.focus());
       }
     }
+  }
 
   onDestroy(() => {
+    if (browser) {
       document.body.style.overflow = '';
+    }
   });
 </script>