fix: rename bots → telegramBots in targets page to fix undefined reference

The variable was named `bots` but getBotName() referenced `telegramBots`,
causing a runtime crash and persistent loading on the targets page.

frontend/src/routes/targets/+page.svelte

@@ -62,7 +62,7 @@
 	let allTargets = $derived(targetsCache.items);
 	let activeType = $derived(page.url.searchParams.get('type') as TargetType | null);
 	let targets = $derived(activeType ? allTargets.filter(t => t.type === activeType) : allTargets);
-	let bots = $derived(telegramBotsCache.items);
+	let telegramBots = $derived(telegramBotsCache.items);
 	let emailBots = $derived(emailBotsCache.items);
 	let matrixBots = $derived(matrixBotsCache.items);
 	let botChats = $state<Record<number, TelegramChat[]>>({});
@@ -237,9 +237,9 @@
 					<select id="tgt-bot" bind:value={form.bot_id} onchange={loadBotChats} required
 						class="w-full px-3 py-2 border border-[var(--color-border)] rounded-md text-sm bg-[var(--color-background)]">
 						<option value={0} disabled>— {t('telegramBot.selectBot')} —</option>
-						{#each bots as bot}<option value={bot.id}>{bot.name} (@{bot.bot_username})</option>{/each}
+						{#each telegramBots as bot}<option value={bot.id}>{bot.name} (@{bot.bot_username})</option>{/each}
 					</select>
-					{#if bots.length === 0}
+					{#if telegramBots.length === 0}
 						<p class="text-xs text-[var(--color-muted-foreground)] mt-1">{t('telegramBot.noBots')} <a href="/telegram-bots" class="underline">→</a></p>
 					{/if}
 				</div>