feat(frontend): group command template slots into 4 logical fieldsets

Mirrors the notification-template page's group layout. Command slots
now split by name prefix into Command Responses, Error Messages
(rate_limited/no_results), Command Descriptions (desc_*), and Usage
Examples (usage_*). Language picker, reset-all, and slot filter are
hoisted above the groups so they apply across all fieldsets, and
empty groups are hidden so providers without usage_* don't render
empty headers.

Drops the orphan cmdTemplateConfig.commandResponsesHint i18n key —
hints.commandResponses replaces it.

frontend/src/lib/i18n/en.json

@@ -823,7 +823,11 @@
 		"defaultCount": "How many results to return when the user doesn't specify a count (1-20).",
 		"responseMode": "Media: send actual photos. Text: send filenames/links only. Media mode uses more bandwidth.",
 		"botLocale": "Language for command descriptions in Telegram's menu and bot response messages.",
-		"rateLimits": "Cooldown in seconds between uses of each command category per chat. 0 = no limit."
+		"rateLimits": "Cooldown in seconds between uses of each command category per chat. 0 = no limit.",
+		"commandResponses": "Reply templates for each /command. Use {variables} to inject dynamic data.",
+		"commandErrors": "Fallback messages shown when a command can't run (rate-limited) or returns nothing.",
+		"commandDescriptions": "Short menu blurbs Telegram shows next to each /command in the chat command picker.",
+		"commandUsage": "Example invocations rendered inside /help to show users how to call each command."
 	},
 	"matrixBot": {
 		"titleEmphasis": "matrix",
@@ -876,7 +880,9 @@
 		"noConfigs": "No command template configs yet.",
 		"confirmDelete": "Delete this command template config?",
 		"commandResponses": "Command Responses",
-		"commandResponsesHint": "Leave a slot empty to use the default hardcoded response."
+		"commandErrors": "Error Messages",
+		"commandDescriptions": "Command Descriptions",
+		"commandUsage": "Usage Examples"
 	},
 	"commandConfig": {
 		"titleEmphasis": "configs",

frontend/src/lib/i18n/ru.json

@@ -823,7 +823,11 @@
 		"defaultCount": "Сколько результатов возвращать, если пользователь не указал количество (1-20).",
 		"responseMode": "Медиа: отправка фото. Текст: только имена файлов/ссылки. Медиа-режим использует больше трафика.",
 		"botLocale": "Язык описаний команд в меню Telegram и ответов бота.",
-		"rateLimits": "Кулдаун в секундах между использованиями команд в каждом чате. 0 = без ограничений."
+		"rateLimits": "Кулдаун в секундах между использованиями команд в каждом чате. 0 = без ограничений.",
+		"commandResponses": "Шаблоны ответов на каждую /команду. Используйте {переменные} для динамических данных.",
+		"commandErrors": "Резервные сообщения, когда команда не может выполниться (превышен лимит) или ничего не возвращает.",
+		"commandDescriptions": "Короткие подписи в меню команд Telegram, которые показываются рядом с каждой /командой.",
+		"commandUsage": "Примеры вызовов, отображаемые в /help, чтобы показать пользователям как вызывать каждую команду."
 	},
 	"matrixBot": {
 		"titleEmphasis": "matrix",
@@ -876,7 +880,9 @@
 		"noConfigs": "Шаблонов команд пока нет.",
 		"confirmDelete": "Удалить этот шаблон команд?",
 		"commandResponses": "Ответы команд",
-		"commandResponsesHint": "Оставьте слот пустым, чтобы использовать ответ по умолчанию."
+		"commandErrors": "Сообщения об ошибках",
+		"commandDescriptions": "Описания команд",
+		"commandUsage": "Примеры использования"
 	},
 	"commandConfig": {
 		"titleEmphasis": "конфигурации",

frontend/src/routes/command-template-configs/+page.svelte

@@ -20,6 +20,7 @@
 	import Modal from '$lib/components/Modal.svelte';
 	import JinjaEditor from '$lib/components/JinjaEditor.svelte';
 	import CollapsibleSlot from '$lib/components/CollapsibleSlot.svelte';
+	import Hint from '$lib/components/Hint.svelte';
 	import EntitySelect, { type EntityItem } from '$lib/components/EntitySelect.svelte';
 	import { getLocaleMeta } from '$lib/locales';
 	import { snackSuccess, snackError } from '$lib/stores/snackbar.svelte';
@@ -126,11 +127,40 @@
 	let commandSlots = $derived<SlotDef[]>(
 		allCapabilities[form.provider_type]?.command_slots || []
 	);
-	let filteredCmdSlots = $derived(
-		slotFilter
-			? commandSlots.filter(s => s.name.toLowerCase().includes(slotFilter.toLowerCase()) || s.description.toLowerCase().includes(slotFilter.toLowerCase()))
-			: commandSlots
-	);
+
+	const ERROR_SLOTS = new Set(['rate_limited', 'no_results']);
+
+	/**
+	 * Group command slots by purpose so the form mirrors how notification
+	 * templates are split (event vs scheduled vs settings).
+	 *
+	 *   commandResponses  — primary reply templates (/start, /help, /status, data slots)
+	 *   commandErrors     — fallback messages (rate_limited, no_results)
+	 *   commandDescriptions — desc_* slots: short menu blurbs in Telegram's command picker
+	 *   commandUsage      — usage_* slots: invocation examples shown by /help
+	 */
+	let commandSlotGroups = $derived([
+		{
+			group: 'commandResponses',
+			slots: commandSlots.filter(s =>
+				!s.name.startsWith('desc_') &&
+				!s.name.startsWith('usage_') &&
+				!ERROR_SLOTS.has(s.name)
+			),
+		},
+		{
+			group: 'commandErrors',
+			slots: commandSlots.filter(s => ERROR_SLOTS.has(s.name)),
+		},
+		{
+			group: 'commandDescriptions',
+			slots: commandSlots.filter(s => s.name.startsWith('desc_')),
+		},
+		{
+			group: 'commandUsage',
+			slots: commandSlots.filter(s => s.name.startsWith('usage_')),
+		},
+	]);
 
 	/** Get slot template for current locale, with fallback. */
 	function getSlotValue(slotName: string): string {
@@ -424,10 +454,6 @@
 		</div>
 		{/if}
 
-		<fieldset class="border border-[var(--color-border)] rounded-md p-3">
-			<legend class="text-sm font-medium px-1">{t('cmdTemplateConfig.commandResponses')}</legend>
-			<p class="text-xs text-[var(--color-muted-foreground)] mb-2">{t('cmdTemplateConfig.commandResponsesHint')}</p>
-
 		<!-- Language picker -->
 		<div class="flex items-center gap-2 mb-3">
 			<span class="text-xs font-medium text-[var(--color-muted-foreground)] shrink-0">
@@ -453,14 +479,21 @@
 
 		<!-- Slot filter -->
 		{#if commandSlots.length > 4}
-			<div class="mb-3">
+		<div>
 			<input type="text" bind:value={slotFilter} placeholder={t('templateConfig.filterSlots')}
 				class="w-full px-3 py-1.5 border border-[var(--color-border)] rounded-md text-sm bg-[var(--color-background)]" />
 		</div>
 		{/if}
 
-			<div class="space-y-2">
-				{#each filteredCmdSlots as slot}
+		{#each commandSlotGroups.filter(g => g.slots.length > 0) as group}
+			{@const filteredSlots = slotFilter ? group.slots.filter(s => s.name.toLowerCase().includes(slotFilter.toLowerCase()) || s.description.toLowerCase().includes(slotFilter.toLowerCase())) : group.slots}
+			{#if filteredSlots.length > 0}
+			<fieldset class="border border-[var(--color-border)] rounded-md p-3">
+				<legend class="text-sm font-medium px-1">
+					{t(`cmdTemplateConfig.${group.group}`)}<Hint text={t(`hints.${group.group}`)} />
+				</legend>
+				<div class="space-y-2 mt-2">
+					{#each filteredSlots as slot}
 						<CollapsibleSlot
 							label={slot.name}
 							description="/{slot.name} — {slot.description}"
@@ -511,6 +544,8 @@
 					{/each}
 				</div>
 			</fieldset>
+			{/if}
+		{/each}
 
 		<button type="submit" class="px-4 py-2 bg-[var(--color-primary)] text-[var(--color-primary-foreground)] rounded-md text-sm font-medium hover:opacity-90">
 			{editing ? t('common.save') : t('common.create')}