Remove manual token input from Telegram targets

Telegram targets now require a registered bot (no manual token
fallback). Shows link to /telegram-bots page when no bots exist.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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

@@ -121,24 +121,19 @@
 				<input id="tgt-name" bind:value={form.name} required placeholder={t('targets.namePlaceholder')} class="w-full px-3 py-2 border border-[var(--color-border)] rounded-md text-sm bg-[var(--color-background)]" />
 			</div>
 			{#if formType === 'telegram'}
-				<!-- Bot selector -->
+				<!-- Bot selector (required) -->
 				<div>
 					<label for="tgt-bot" class="block text-sm font-medium mb-1">{t('telegramBot.selectBot')}</label>
-					<select id="tgt-bot" bind:value={form.bot_id} onchange={loadBotChats}
+					<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}>— Manual token —</option>
+						<option value={0} disabled>— {t('telegramBot.selectBot')} —</option>
 						{#each bots as bot}<option value={bot.id}>{bot.name} (@{bot.bot_username})</option>{/each}
 					</select>
+					{#if bots.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>
 
-				{#if !form.bot_id}
-					<!-- Manual token input (fallback) -->
-					<div>
-						<label for="tgt-token" class="block text-sm font-medium mb-1">{t('targets.botToken')}</label>
-						<input id="tgt-token" bind:value={form.bot_token} required type="password" class="w-full px-3 py-2 border border-[var(--color-border)] rounded-md text-sm bg-[var(--color-background)]" />
-					</div>
-				{/if}
-
 				<!-- Chat selector -->
 				<div>
 					<label for="tgt-chat" class="block text-sm font-medium mb-1">{t('telegramBot.selectChat')}</label>