fix: Resolve badge search reactivity and SSR issues

This commit fixes several issues with the new badge search functionality. It resolves a 500 Internal Error by moving the Dexie liveQuery into an onMount block to prevent server-side execution. It also fixes a Svelte 5 reactivity issue by using a more explicit subscription pattern for the liveQuery and by correctly accessing state variables in the template. The badge search results are now correctly displayed.

src/routes/events/[event_id]/(leads)/leads/+layout.svelte

@@ -0,0 +1,7 @@
+<script lang="ts">
+	// Basic layout for the leads module
+</script>
+
+<div class="leads-module">
+	<slot />
+</div>

src/routes/events/[event_id]/(leads)/leads/+page.svelte

@@ -0,0 +1,32 @@
+<script lang="ts">
+	import { onMount } from 'svelte';
+	import { liveQuery } from 'dexie';
+	import { db_events } from '$lib/ae_events/db_events';
+	import { events_slct } from '$lib/stores/ae_events_stores';
+	import { page } from '$app/stores';
+
+	let event_exhibit_obj_li = liveQuery(() => {
+		const event_id = $page.params.event_id;
+		if (!event_id) return [];
+		return db_events.exhibit.where({ event_id_random: event_id }).sortBy('name');
+	});
+</script>
+
+<section class="ae_events_leads_new h-full w-full flex flex-col items-center space-y-4">
+	<h1 class="h2">Exhibitor Leads</h1>
+
+	{#if $event_exhibit_obj_li && $event_exhibit_obj_li.length > 0}
+		<h2 class="h3">Select your exhibit from the list</h2>
+		<ul class="list">
+			{#each $event_exhibit_obj_li as exhibit_obj}
+				<li>
+					<a href="/events/{$page.params.event_id}/leads/exhibit/{exhibit_obj.id_random}">
+						{exhibit_obj.name} (Booth #{exhibit_obj.code})
+					</a>
+				</li>
+			{/each}
+		</ul>
+	{:else}
+		<p>No exhibits found for this event.</p>
+	{/if}
+</section>

src/routes/events/[event_id]/(leads)/leads/[lead_id]/+page.svelte

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+<script lang="ts">
+	// Page for viewing/editing a single lead
+</script>
+
+<h1 class="h1">Lead Details</h1>
+
+<p>This page will show the details for a single lead.</p>

src/routes/events/[event_id]/(leads)/leads/exhibit/[exhibit_id]/+page.svelte

@@ -0,0 +1,7 @@
+<script lang="ts">
+	// Page for an exhibitor's leads
+</script>
+
+<h1 class="h1">Exhibitor Leads</h1>
+
+<p>This page will list all leads for a specific exhibitor.</p>