feat: broadcast notification target + UX improvements

Add broadcast target type that fans out notifications to multiple
child targets. Dispatch expands broadcast into children in
load_link_data() — dispatcher stays unaware. Children can be
toggled on/off via disabled_child_ids in config.

Also: dashboard provider card smaller font for names, scroll-to-form
on target edit, broadcast nav tab with counter, flag_modified fix
for JSON column updates, CLAUDE.md nav tree docs.

CLAUDE.md

@@ -34,4 +34,5 @@ Detailed context is split into focused documents under `.claude/docs/`. Read the
    - Components use `getDescriptor(type)` and render dynamically from the descriptor
    - Feature gating: check `capabilities.notification_slots` or `capabilities.commands`, not `provider.type === 'immich'`
    - Template variable helpers: ALL provider types must have entries in `get_template_variables()`
-9. **New provider descriptor checklist** — when adding a new service provider, create a descriptor file in `frontend/src/lib/providers/{name}.ts` and register it in `index.ts`. The descriptor must define: `type`, `defaultName`, `icon`, `hasUrl`, `configFields`, `buildConfig()`, `hasConfigChanged()`, `eventFields`, `collectionMeta` (or `null`). Optional: `extraTrackingFields`, `featureSections`, `webhookUrlPattern`, `webhookBased`, `onBeforeSave`. Also add i18n keys: `providers.type{PascalName}` and `gridDesc.provider{PascalName}` in both `en.json` and `ru.json`.
+9. **Nav tree & entity types** — when adding a new entity type (target type, bot type, etc.), update the sidebar nav in `frontend/src/routes/+layout.svelte`. Target types need: `{ href: '/targets?type={type}', key: 'nav.target{PascalName}', icon: '...', countKey: 'targets_{type}' }` in the `children` array under `nav.targets`, plus i18n keys `nav.target{PascalName}` in both locale files. Also add the counter entry `targets_{type}: targets.filter(t => t.type === '{type}').length` to the `counts` derived block in `+layout.svelte`.
+10. **New provider descriptor checklist** — when adding a new service provider, create a descriptor file in `frontend/src/lib/providers/{name}.ts` and register it in `index.ts`. The descriptor must define: `type`, `defaultName`, `icon`, `hasUrl`, `configFields`, `buildConfig()`, `hasConfigChanged()`, `eventFields`, `collectionMeta` (or `null`). Optional: `extraTrackingFields`, `featureSections`, `webhookUrlPattern`, `webhookBased`, `onBeforeSave`. Also add i18n keys: `providers.type{PascalName}` and `gridDesc.provider{PascalName}` in both `en.json` and `ru.json`.

frontend/src/lib/i18n/en.json

@@ -34,6 +34,7 @@
 		"targetSlack": "Slack",
 		"targetNtfy": "ntfy",
 		"targetMatrix": "Matrix",
+		"targetBroadcast": "Broadcast",
 		"automation": "Automation",
 		"actions": "Actions"
 	},
@@ -256,6 +257,11 @@
 		"descSlack": "Slack channel webhooks for notifications",
 		"descNtfy": "ntfy push notification topics",
 		"descMatrix": "Matrix room destinations for notifications",
+		"descBroadcast": "Send to multiple targets at once",
+		"childTargets": "target(s)",
+		"selectChildTargets": "Select child targets",
+		"noChildTargets": "No child targets configured.",
+		"noChildTargetsAvailable": "Create other targets first, then add them here.",
 		"addTarget": "Add Target",
 		"cancel": "Cancel",
 		"type": "Type",
@@ -814,6 +820,8 @@
 		"syntaxError": "Syntax error",
 		"undefinedVar": "Unknown variable",
 		"line": "line",
+		"enable": "Enable",
+		"disable": "Disable",
 		"add": "Add",
 		"filterByName": "Filter by name...",
 		"allTypes": "All types",

frontend/src/lib/i18n/ru.json

@@ -34,6 +34,7 @@
 		"targetSlack": "Slack",
 		"targetNtfy": "ntfy",
 		"targetMatrix": "Matrix",
+		"targetBroadcast": "Рассылка",
 		"automation": "Автоматизация",
 		"actions": "Действия"
 	},
@@ -256,6 +257,11 @@
 		"descSlack": "Вебхуки каналов Slack для уведомлений",
 		"descNtfy": "Топики ntfy для push-уведомлений",
 		"descMatrix": "Комнаты Matrix для доставки уведомлений",
+		"descBroadcast": "Отправка сразу в несколько целей",
+		"childTargets": "цель(ей)",
+		"selectChildTargets": "Выберите дочерние цели",
+		"noChildTargets": "Дочерние цели не настроены.",
+		"noChildTargetsAvailable": "Сначала создайте другие цели, затем добавьте их сюда.",
 		"addTarget": "Добавить получателя",
 		"cancel": "Отмена",
 		"type": "Тип",
@@ -814,6 +820,8 @@
 		"syntaxError": "Ошибка синтаксиса",
 		"undefinedVar": "Неизвестная переменная",
 		"line": "строка",
+		"enable": "Включить",
+		"disable": "Выключить",
 		"add": "Добавить",
 		"filterByName": "Фильтр по имени...",
 		"allTypes": "Все типы",

frontend/src/lib/types.ts

@@ -106,6 +106,8 @@ export interface NotificationTarget {
 	chat_name?: string;
 	receiver_count: number;
 	receivers: TargetReceiver[];
+	/** Broadcast targets only: resolved child target summaries. */
+	child_targets?: { id: number; name: string; type: string; icon: string }[];
 	created_at: string;
 }
 

frontend/src/routes/+layout.svelte

@@ -104,6 +104,7 @@
 			targets_slack: targets.filter(t => t.type === 'slack').length,
 			targets_ntfy: targets.filter(t => t.type === 'ntfy').length,
 			targets_matrix: targets.filter(t => t.type === 'matrix').length,
+			targets_broadcast: targets.filter(t => t.type === 'broadcast').length,
 		} as Record<string, number>;
 	});
 
@@ -169,6 +170,7 @@
 				{ href: '/targets?type=slack', key: 'nav.targetSlack', icon: 'mdiSlack', countKey: 'targets_slack' },
 				{ href: '/targets?type=ntfy', key: 'nav.targetNtfy', icon: 'mdiBell', countKey: 'targets_ntfy' },
 				{ href: '/targets?type=matrix', key: 'nav.targetMatrix', icon: 'mdiMatrix', countKey: 'targets_matrix' },
+				{ href: '/targets?type=broadcast', key: 'nav.targetBroadcast', icon: 'mdiBullhorn', countKey: 'targets_broadcast' },
 			],
 		},
 	];

frontend/src/routes/+page.svelte

@@ -250,7 +250,7 @@
 						</div>
 						<div>
 							<p class="text-sm" style="color: var(--color-muted-foreground);">{card.literalLabel || t(card.label)}</p>
-							<p class="stat-value font-mono" style="animation-delay: {i * 80 + 200}ms;">
+							<p class="{card.literalValue ? 'stat-value-text' : 'stat-value'} font-mono" style="animation-delay: {i * 80 + 200}ms;">
 								{#if card.literalValue}{card.literalValue}{:else}{card.value}{/if}{#if card.suffix}<span class="stat-suffix">{card.suffix}</span>{/if}
 							</p>
 						</div>
@@ -362,6 +362,7 @@
 	.stat-card-inner { background: var(--color-card); border-radius: calc(0.75rem - 1px); padding: 1.25rem; }
 	.stat-icon { display: flex; align-items: center; justify-content: center; width: 2.75rem; height: 2.75rem; border-radius: 0.75rem; flex-shrink: 0; }
 	.stat-value { font-size: 1.75rem; font-weight: 600; line-height: 1.2; animation: countUp 0.5s ease-out both; }
+	.stat-value-text { font-size: 1rem; font-weight: 600; line-height: 1.3; animation: countUp 0.5s ease-out both; }
 	.stat-suffix { font-size: 1rem; font-weight: 400; color: var(--color-muted-foreground); }
 	.event-timeline { display: flex; flex-direction: column; }
 	.event-item { display: flex; align-items: flex-start; gap: 1rem; position: relative; padding-bottom: 0.75rem; }

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

@@ -1,5 +1,5 @@
 <script lang="ts">
-	import { onMount } from 'svelte';
+	import { onMount, tick } from 'svelte';
 	import { page } from '$app/state';
 	import { api } from '$lib/api';
 	import { t, getLocale } from '$lib/i18n';
@@ -70,15 +70,17 @@
 
 	// ── Constants ──
 
-	const ALL_TYPES = ['telegram', 'webhook', 'email', 'discord', 'slack', 'ntfy', 'matrix'] as const;
+	const ALL_TYPES = ['telegram', 'webhook', 'email', 'discord', 'slack', 'ntfy', 'matrix', 'broadcast'] as const;
 	type TargetType = typeof ALL_TYPES[number];
 	const TYPE_ICONS: Record<string, string> = {
 		telegram: 'mdiSend', webhook: 'mdiWebhook', email: 'mdiEmailOutline',
 		discord: 'mdiChat', slack: 'mdiSlack', ntfy: 'mdiBell', matrix: 'mdiMatrix',
+		broadcast: 'mdiBullhorn',
 	};
 	const TYPE_DESC_KEYS: Record<string, string> = {
 		telegram: 'targets.descTelegram', webhook: 'targets.descWebhook', email: 'targets.descEmail',
 		discord: 'targets.descDiscord', slack: 'targets.descSlack', ntfy: 'targets.descNtfy', matrix: 'targets.descMatrix',
+		broadcast: 'targets.descBroadcast',
 	};
 
 	const typeGridItems = $derived(ALL_TYPES.map(tt => ({
@@ -120,6 +122,8 @@
 		matrix_bot_id: 0,
 		// Email
 		email_bot_id: 0,
+		// Broadcast
+		child_target_ids: [] as number[],
 	});
 	let form = $state(defaultForm());
 	let error = $state('');
@@ -128,6 +132,12 @@
 	let loadError = $state('');
 	let showTelegramSettings = $state(false);
 	let confirmDelete = $state<NotificationTarget | null>(null);
+	let formEl: HTMLElement;
+
+	async function scrollToForm() {
+		await tick();
+		formEl?.scrollIntoView({ behavior: 'smooth', block: 'start' });
+	}
 
 	// ── Receiver inline form state ──
 
@@ -185,6 +195,7 @@
 		editing = null;
 		showTelegramSettings = false;
 		showForm = true;
+		scrollToForm();
 	}
 
 	async function edit(tgt: NotificationTarget) {
@@ -207,10 +218,13 @@
 			email_bot_id: c.email_bot_id || 0,
 			// matrix
 			matrix_bot_id: c.matrix_bot_id || 0,
+			// broadcast
+			child_target_ids: c.child_target_ids || [],
 		};
 		editing = tgt.id;
 		showTelegramSettings = false;
 		showForm = true;
+		scrollToForm();
 	}
 
 	async function save(e: SubmitEvent) {
@@ -245,6 +259,8 @@
 				config = { email_bot_id: form.email_bot_id };
 			} else if (formType === 'matrix') {
 				config = { matrix_bot_id: form.matrix_bot_id };
+			} else if (formType === 'broadcast') {
+				config = { child_target_ids: form.child_target_ids };
 			}
 
 			if (editing) {
@@ -367,6 +383,21 @@
 		} catch (err: any) { snackError(err.message); }
 	}
 
+	async function toggleBroadcastChild(targetId: number, childId: number) {
+		const tgt = allTargets.find(t => t.id === targetId);
+		if (!tgt) return;
+		const disabled = new Set<number>(tgt.config?.disabled_child_ids || []);
+		if (disabled.has(childId)) disabled.delete(childId);
+		else disabled.add(childId);
+		try {
+			await api(`/targets/${targetId}`, {
+				method: 'PUT',
+				body: JSON.stringify({ config: { ...tgt.config, disabled_child_ids: [...disabled] } }),
+			});
+			await load();
+		} catch (err: any) { snackError(err.message); }
+	}
+
 	async function testReceiver(targetId: number, receiverId: number) {
 		receiverTesting = { ...receiverTesting, [receiverId]: true };
 		try {
@@ -392,6 +423,7 @@
 {/if}
 
 {#if showForm}
+	<div bind:this={formEl}></div>
 	<TargetForm
 		bind:form
 		bind:formType
@@ -404,6 +436,7 @@
 		telegramBotCount={telegramBots.length}
 		emailBotCount={emailBots.length}
 		matrixBotCount={matrixBots.length}
+		broadcastChildItems={allTargets.filter(t => t.type !== 'broadcast' && t.id !== editing).map(t => ({ value: t.id, label: t.name, icon: t.icon || TYPE_ICONS[t.type] || 'mdiTarget', desc: t.type }))}
 		{editing}
 		{submitting}
 		{error}
@@ -439,7 +472,11 @@
 							<span style="color: var(--color-primary);"><MdiIcon name={target.icon || TYPE_ICONS[target.type] || 'mdiTarget'} size={20} /></span>
 							<p class="font-medium">{target.name}</p>
 							{#if !activeType}<span class="text-xs px-1.5 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{target.type}</span>{/if}
-							{#if (target.receivers || []).length > 0}<span class="text-xs px-1.5 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{(target.receivers || []).length} receiver(s)</span>{/if}
+							{#if target.type === 'broadcast' && target.child_targets?.length}
+								<span class="text-xs px-1.5 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{target.child_targets.length} {t('targets.childTargets')}</span>
+							{:else if target.type !== 'broadcast' && (target.receivers || []).length > 0}
+								<span class="text-xs px-1.5 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{(target.receivers || []).length} receiver(s)</span>
+							{/if}
 							{#if getBotName(target)}<CrossLink href={getBotHref(target)} icon="mdiRobot" label={getBotName(target) ?? ''} entityId={getBotEntityId(target)} />{/if}
 						</div>
 					</div>
@@ -469,6 +506,7 @@
 					ontestReceiver={testReceiver}
 					onloadBotChats={loadReceiverBotChats}
 					onchangeReceiverForm={(f) => receiverForm = f}
+					ontoggleBroadcastChild={toggleBroadcastChild}
 				/>
 			</Card>
 		{/each}

frontend/src/routes/targets/ReceiverSection.svelte

@@ -24,6 +24,7 @@
 		ontestReceiver: (targetId: number, receiverId: number) => void;
 		onloadBotChats: (botId: number) => void;
 		onchangeReceiverForm: (form: Record<string, any>) => void;
+		ontoggleBroadcastChild?: (targetId: number, childId: number) => void;
 	}
 
 	let {
@@ -44,10 +45,37 @@
 		ontestReceiver,
 		onloadBotChats,
 		onchangeReceiverForm,
+		ontoggleBroadcastChild,
 	}: Props = $props();
 </script>
 
 <div class="mt-3 pt-3 border-t border-[var(--color-border)]">
+{#if target.type === 'broadcast'}
+	<div class="flex items-center justify-between mb-2">
+		<p class="text-xs font-medium text-[var(--color-muted-foreground)] uppercase tracking-wide">{t('targets.childTargets')}</p>
+	</div>
+	{@const disabledIds = new Set(target.config?.disabled_child_ids || [])}
+	{#if target.child_targets?.length}
+		{#each target.child_targets as child (child.id)}
+			{@const isDisabled = disabledIds.has(child.id)}
+			<div class="flex items-center justify-between py-1.5 px-2 rounded-md hover:bg-[var(--color-muted)]" class:opacity-50={isDisabled}>
+				<div class="flex items-center gap-2">
+					<MdiIcon name={child.icon || typeIcons[child.type] || 'mdiTarget'} size={14} />
+					<span class="text-sm">{child.name}</span>
+					<span class="text-xs px-1 py-0.5 rounded bg-[var(--color-muted)] text-[var(--color-muted-foreground)]">{child.type}</span>
+				</div>
+				<IconButton
+					icon={isDisabled ? 'mdiToggleSwitchOff' : 'mdiToggleSwitch'}
+					title={isDisabled ? t('common.enable') : t('common.disable')}
+					onclick={() => ontoggleBroadcastChild?.(target.id, child.id)}
+					size={16}
+				/>
+			</div>
+		{/each}
+	{:else}
+		<p class="text-xs text-[var(--color-muted-foreground)] italic">{t('targets.noChildTargets')}</p>
+	{/if}
+{:else}
 	<div class="flex items-center justify-between mb-2">
 		<p class="text-xs font-medium text-[var(--color-muted-foreground)] uppercase tracking-wide">{t('targets.receivers')}</p>
 	</div>
@@ -153,4 +181,5 @@
 			{t('targets.addReceiver')}
 		</button>
 	{/if}
+{/if}
 </div>

frontend/src/routes/targets/TargetForm.svelte

@@ -6,6 +6,7 @@
 	import Hint from '$lib/components/Hint.svelte';
 	import IconGridSelect from '$lib/components/IconGridSelect.svelte';
 	import EntitySelect from '$lib/components/EntitySelect.svelte';
+	import MultiEntitySelect from '$lib/components/MultiEntitySelect.svelte';
 	import type { EntityItem } from '$lib/components/EntitySelect.svelte';
 	import type { GridItem } from '$lib/components/IconGridSelect.svelte';
 
@@ -28,6 +29,7 @@
 			auth_token: string;
 			matrix_bot_id: number;
 			email_bot_id: number;
+			child_target_ids: number[];
 		};
 		formType: string;
 		activeType: string | null;
@@ -36,6 +38,7 @@
 		emailBotItems: EntityItem[];
 		matrixBotItems: EntityItem[];
 		chatActionItems: GridItem[];
+		broadcastChildItems?: { value: number; label: string; icon: string; desc: string }[];
 		telegramBotCount: number;
 		emailBotCount: number;
 		matrixBotCount: number;
@@ -56,6 +59,7 @@
 		emailBotItems,
 		matrixBotItems,
 		chatActionItems,
+		broadcastChildItems = [],
 		telegramBotCount,
 		emailBotCount,
 		matrixBotCount,
@@ -160,6 +164,20 @@
 					<p class="text-xs text-[var(--color-muted-foreground)] mt-1">{t('matrixBot.noBots')} <a href="/bots?tab=matrix" class="underline">→</a></p>
 				{/if}
 			</div>
+		{:else if formType === 'broadcast'}
+			{@const childIds = (form.child_target_ids || []).map(String)}
+			<div>
+				<label class="block text-sm font-medium mb-1">{t('targets.selectChildTargets')}</label>
+				<MultiEntitySelect
+					items={broadcastChildItems?.map(i => ({ value: String(i.value), label: i.label, icon: i.icon, desc: i.desc })) ?? []}
+					values={childIds}
+					onchange={(vals) => form.child_target_ids = vals.map(Number)}
+					placeholder={t('targets.selectChildTargets')}
+				/>
+				{#if broadcastChildItems?.length === 0}
+					<p class="text-xs text-[var(--color-muted-foreground)] mt-1">{t('targets.noChildTargetsAvailable')}</p>
+				{/if}
+			</div>
 		{/if}
 
 		{#if formType === 'telegram'}

packages/server/src/notify_bridge_server/api/targets.py

@@ -111,8 +111,11 @@ async def list_targets(
                         if lang:
                             chat_languages[f"{bot_id}_{chat_id}"] = lang
 
+    # Build lookup for broadcast child target resolution
+    target_map = {t.id: t for t in targets}
+
     return [
-        _target_response(t, chat_names, target_receivers.get(t.id, []), chat_languages)
+        _target_response(t, chat_names, target_receivers.get(t.id, []), chat_languages, target_map)
         for t in targets
     ]
 
@@ -124,15 +127,24 @@ async def create_target(
     session: AsyncSession = Depends(get_session),
 ):
     """Create a new notification target."""
-    valid_types = ("telegram", "webhook", "email", "discord", "slack", "ntfy", "matrix")
+    valid_types = ("telegram", "webhook", "email", "discord", "slack", "ntfy", "matrix", "broadcast")
     if body.type not in valid_types:
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
             detail=f"Type must be one of: {', '.join(valid_types)}",
         )
 
-    # Extract delivery fields from config — they go into a TargetReceiver
-    clean_config, receiver_cfg = _extract_delivery_fields(body.type, body.config)
+    # Broadcast-specific validation
+    if body.type == "broadcast":
+        child_ids = body.config.get("child_target_ids", [])
+        if not isinstance(child_ids, list):
+            raise HTTPException(status_code=400, detail="child_target_ids must be a list")
+        await _validate_broadcast_children(session, child_ids, user.id, exclude_target_id=None)
+        clean_config = {"child_target_ids": child_ids}
+        receiver_cfg: dict[str, Any] = {}
+    else:
+        # Extract delivery fields from config — they go into a TargetReceiver
+        clean_config, receiver_cfg = _extract_delivery_fields(body.type, body.config)
 
     target = NotificationTarget(
         user_id=user.id,
@@ -190,34 +202,46 @@ async def update_target(
 
     # If config is being updated, extract any delivery fields
     if "config" in updates and updates["config"] is not None:
-        clean_config, receiver_cfg = _extract_delivery_fields(target.type, updates["config"])
-        updates["config"] = clean_config
+        if target.type == "broadcast":
+            child_ids = updates["config"].get("child_target_ids", [])
+            if not isinstance(child_ids, list):
+                raise HTTPException(status_code=400, detail="child_target_ids must be a list")
+            await _validate_broadcast_children(session, child_ids, user.id, exclude_target_id=target.id)
+            disabled_ids = updates["config"].get("disabled_child_ids", [])
+            updates["config"] = {"child_target_ids": child_ids, "disabled_child_ids": disabled_ids}
+        else:
+            clean_config, receiver_cfg = _extract_delivery_fields(target.type, updates["config"])
+            updates["config"] = clean_config
 
-        # Update or create receiver if delivery fields were present
-        if receiver_cfg:
-            key = _receiver_key(target.type, receiver_cfg)
-            existing_result = await session.exec(
-                select(TargetReceiver).where(
-                    TargetReceiver.target_id == target.id,
-                    TargetReceiver.receiver_key == key,
+            # Update or create receiver if delivery fields were present
+            if receiver_cfg:
+                key = _receiver_key(target.type, receiver_cfg)
+                existing_result = await session.exec(
+                    select(TargetReceiver).where(
+                        TargetReceiver.target_id == target.id,
+                        TargetReceiver.receiver_key == key,
+                    )
                 )
-            )
-            existing_recv = existing_result.first()
-            if existing_recv:
-                existing_recv.config = receiver_cfg
-                session.add(existing_recv)
-            else:
-                receiver = TargetReceiver(
-                    target_id=target.id,
-                    name=target.name,
-                    config=receiver_cfg,
-                    receiver_key=key,
-                    enabled=True,
-                )
-                session.add(receiver)
+                existing_recv = existing_result.first()
+                if existing_recv:
+                    existing_recv.config = receiver_cfg
+                    session.add(existing_recv)
+                else:
+                    receiver = TargetReceiver(
+                        target_id=target.id,
+                        name=target.name,
+                        config=receiver_cfg,
+                        receiver_key=key,
+                        enabled=True,
+                    )
+                    session.add(receiver)
 
     for field_name, value in updates.items():
         setattr(target, field_name, value)
+    # Force SQLAlchemy to detect JSON column change
+    from sqlalchemy.orm.attributes import flag_modified
+    if "config" in updates:
+        flag_modified(target, "config")
     session.add(target)
     await session.commit()
     await session.refresh(target)
@@ -257,11 +281,37 @@ async def test_target(
     return result
 
 
+async def _validate_broadcast_children(
+    session: AsyncSession,
+    child_ids: list[int],
+    user_id: int,
+    *,
+    exclude_target_id: int | None = None,
+) -> None:
+    """Validate broadcast child target IDs.
+
+    - All IDs must exist and belong to the user
+    - No broadcast targets allowed as children (prevents circular refs)
+    - Cannot reference itself
+    """
+    if not child_ids:
+        return
+    if exclude_target_id and exclude_target_id in child_ids:
+        raise HTTPException(status_code=400, detail="A broadcast target cannot include itself")
+    for child_id in child_ids:
+        child = await session.get(NotificationTarget, child_id)
+        if not child or child.user_id != user_id:
+            raise HTTPException(status_code=400, detail=f"Child target {child_id} not found")
+        if child.type == "broadcast":
+            raise HTTPException(status_code=400, detail="A broadcast target cannot include another broadcast")
+
+
 def _target_response(
     target: NotificationTarget,
     chat_names: dict[str, str] | None = None,
     receivers: list[TargetReceiver] | None = None,
     chat_languages: dict[str, str] | None = None,
+    target_map: dict[int, NotificationTarget] | None = None,
 ) -> dict:
     recv_list = receivers or []
     resp = {
@@ -295,6 +345,14 @@ def _target_response(
                 recv_resp["chat_name"] = chat_names[key]
             if chat_languages and key in chat_languages:
                 recv_resp["language_code"] = chat_languages[key]
+    # Attach child target summaries for broadcast targets
+    if target.type == "broadcast" and target_map:
+        child_ids = target.config.get("child_target_ids", [])
+        resp["child_targets"] = [
+            {"id": cid, "name": target_map[cid].name, "type": target_map[cid].type, "icon": target_map[cid].icon}
+            for cid in child_ids if cid in target_map
+        ]
+        resp["receiver_count"] = len(resp["child_targets"])
     return resp
 
 

packages/server/src/notify_bridge_server/services/dispatch_helpers.py

@@ -96,6 +96,88 @@ def event_allowed_by_config(event: ServiceEvent, tc: TrackingConfig) -> bool:
     return flag_map.get(event_type, True)
 
 
+async def _resolve_target(
+    session: AsyncSession,
+    target: NotificationTarget,
+) -> dict[str, Any]:
+    """Resolve a single target into dispatch-ready data (config + receivers + credentials).
+
+    Returns a dict with target_type, target_config, and receivers.
+    Does NOT include tracking_config or template_slots — those come from the tracker link.
+    """
+    # Load receivers as typed Receiver objects
+    recv_result = await session.exec(
+        select(TargetReceiver).where(
+            TargetReceiver.target_id == target.id,
+            TargetReceiver.enabled == True,
+        )
+    )
+    recv_rows = recv_result.all()
+
+    # For Telegram targets, resolve locale from TelegramChat
+    chat_locale_map: dict[str, str] = {}
+    if target.type == "telegram":
+        bot_id = target.config.get("bot_id")
+        if bot_id:
+            chat_ids = [str(r.config.get("chat_id", "")) for r in recv_rows if r.config.get("chat_id")]
+            if chat_ids:
+                chat_result = await session.exec(
+                    select(TelegramChat).where(
+                        TelegramChat.bot_id == bot_id,
+                        TelegramChat.chat_id.in_(chat_ids),
+                    )
+                )
+                for chat in chat_result.all():
+                    resolved = (
+                        getattr(chat, 'language_override', '') or
+                        getattr(chat, 'language_code', '') or ''
+                    )
+                    if resolved:
+                        chat_locale_map[chat.chat_id] = resolved[:2].lower()
+
+    receivers: list[Receiver] = []
+    for r in recv_rows:
+        explicit_locale = getattr(r, 'locale', '') or ''
+        locale = explicit_locale
+        if not locale and target.type == "telegram":
+            chat_id = str(r.config.get("chat_id", ""))
+            locale = chat_locale_map.get(chat_id, "")
+        receivers.append(build_receiver(target.type, dict(r.config), locale))
+
+    target_config = dict(target.config)
+    # Inject chat_action for Telegram targets
+    if hasattr(target, 'chat_action') and target.chat_action:
+        target_config["chat_action"] = target.chat_action
+    # Inject bot credentials for bot-backed target types
+    if target.type == "email":
+        email_bot_id = target.config.get("email_bot_id")
+        if email_bot_id:
+            email_bot = await session.get(EmailBot, email_bot_id)
+            if email_bot:
+                target_config["smtp"] = {
+                    "host": email_bot.smtp_host,
+                    "port": email_bot.smtp_port,
+                    "username": email_bot.smtp_username,
+                    "password": email_bot.smtp_password,
+                    "from_address": email_bot.email,
+                    "from_name": email_bot.name,
+                    "use_tls": email_bot.smtp_use_tls,
+                }
+    elif target.type == "matrix":
+        matrix_bot_id = target.config.get("matrix_bot_id")
+        if matrix_bot_id:
+            matrix_bot = await session.get(MatrixBot, matrix_bot_id)
+            if matrix_bot:
+                target_config["homeserver_url"] = matrix_bot.homeserver_url
+                target_config["access_token"] = matrix_bot.access_token
+
+    return {
+        "target_type": target.type,
+        "target_config": target_config,
+        "receivers": receivers,
+    }
+
+
 async def load_link_data(
     session: AsyncSession,
     tracker_id: int,
@@ -127,45 +209,7 @@ async def load_link_data(
         if not target:
             continue
 
-        # Load receivers as typed Receiver objects
-        recv_result = await session.exec(
-            select(TargetReceiver).where(
-                TargetReceiver.target_id == target.id,
-                TargetReceiver.enabled == True,
-            )
-        )
-        recv_rows = recv_result.all()
-
-        # For Telegram targets, resolve locale from TelegramChat
-        chat_locale_map: dict[str, str] = {}
-        if target.type == "telegram":
-            bot_id = target.config.get("bot_id")
-            if bot_id:
-                chat_ids = [str(r.config.get("chat_id", "")) for r in recv_rows if r.config.get("chat_id")]
-                if chat_ids:
-                    chat_result = await session.exec(
-                        select(TelegramChat).where(
-                            TelegramChat.bot_id == bot_id,
-                            TelegramChat.chat_id.in_(chat_ids),
-                        )
-                    )
-                    for chat in chat_result.all():
-                        resolved = (
-                            getattr(chat, 'language_override', '') or
-                            getattr(chat, 'language_code', '') or ''
-                        )
-                        if resolved:
-                            chat_locale_map[chat.chat_id] = resolved[:2].lower()
-
-        receivers: list[Receiver] = []
-        for r in recv_rows:
-            explicit_locale = getattr(r, 'locale', '') or ''
-            locale = explicit_locale
-            if not locale and target.type == "telegram":
-                chat_id = str(r.config.get("chat_id", ""))
-                locale = chat_locale_map.get(chat_id, "")
-            receivers.append(build_receiver(target.type, dict(r.config), locale))
-
+        # Load tracking config and template slots (shared across broadcast children)
         tracking_config = None
         if tt.tracking_config_id:
             tracking_config = await session.get(TrackingConfig, tt.tracking_config_id)
@@ -184,37 +228,29 @@ async def load_link_data(
                     raw_slots.setdefault(event_key, {})[s.locale] = s.template
                 template_slots = raw_slots
 
-        target_config = dict(target.config)
-        # Inject chat_action for Telegram targets
-        if hasattr(target, 'chat_action') and target.chat_action:
-            target_config["chat_action"] = target.chat_action
-        # Inject bot credentials for bot-backed target types
-        if target.type == "email":
-            email_bot_id = target.config.get("email_bot_id")
-            if email_bot_id:
-                email_bot = await session.get(EmailBot, email_bot_id)
-                if email_bot:
-                    target_config["smtp"] = {
-                        "host": email_bot.smtp_host,
-                        "port": email_bot.smtp_port,
-                        "username": email_bot.smtp_username,
-                        "password": email_bot.smtp_password,
-                        "from_address": email_bot.email,
-                        "from_name": email_bot.name,
-                        "use_tls": email_bot.smtp_use_tls,
-                    }
-        elif target.type == "matrix":
-            matrix_bot_id = target.config.get("matrix_bot_id")
-            if matrix_bot_id:
-                matrix_bot = await session.get(MatrixBot, matrix_bot_id)
-                if matrix_bot:
-                    target_config["homeserver_url"] = matrix_bot.homeserver_url
-                    target_config["access_token"] = matrix_bot.access_token
+        # Broadcast target: expand into child targets
+        if target.type == "broadcast":
+            child_ids = target.config.get("child_target_ids", [])
+            disabled_ids = set(target.config.get("disabled_child_ids", []))
+            for child_id in child_ids:
+                if child_id in disabled_ids:
+                    continue
+                child_target = await session.get(NotificationTarget, child_id)
+                if not child_target or child_target.type == "broadcast":
+                    continue
+                resolved = await _resolve_target(session, child_target)
+                link_data.append({
+                    **resolved,
+                    "tracking_config": tracking_config,
+                    "template_config": template_config,
+                    "template_slots": template_slots,
+                })
+            continue
 
+        # Regular target
+        resolved = await _resolve_target(session, target)
         link_data.append({
-            "target_type": target.type,
-            "target_config": target_config,
-            "receivers": receivers,
+            **resolved,
             "tracking_config": tracking_config,
             "template_config": template_config,
             "template_slots": template_slots,

packages/server/src/notify_bridge_server/services/notifier.py

@@ -309,11 +309,35 @@ async def send_to_receiver(target: NotificationTarget, receiver_config: dict, me
 
 
 async def send_test_notification(target: NotificationTarget, locale: str = "en") -> dict:
-    """Send a simple test message."""
+    """Send a simple test message. For broadcast targets, fans out to all children."""
+    if target.type == "broadcast":
+        return await _send_broadcast_test(target, locale)
     message = _get_test_message(locale, target.type)
     return await send_to_target(target, message)
 
 
+async def _send_broadcast_test(target: NotificationTarget, locale: str) -> dict:
+    """Send test notifications to all child targets of a broadcast target."""
+    child_ids = target.config.get("child_target_ids", [])
+    if not child_ids:
+        return {"success": False, "error": "No child targets configured"}
+
+    disabled_ids = set(target.config.get("disabled_child_ids", []))
+    engine = get_engine()
+    results: list[dict] = []
+    async with AsyncSession(engine) as session:
+        for child_id in child_ids:
+            if child_id in disabled_ids:
+                continue
+            child = await session.get(NotificationTarget, child_id)
+            if not child or child.type == "broadcast":
+                continue
+            message = _get_test_message(locale, child.type)
+            results.append(await send_to_target(child, message))
+
+    return _aggregate(results)
+
+
 async def send_test_template_notification(
     target: NotificationTarget, slot: str, template_str: str
 ) -> dict:

scripts/restart-backend.sh

@@ -15,7 +15,7 @@ fi
 # Start backend
 NOTIFY_BRIDGE_DATA_DIR=./test-data \
 NOTIFY_BRIDGE_SECRET_KEY=test-secret-key-minimum-32chars \
-PYTHON=$(command -v python3 2>/dev/null || command -v python 2>/dev/null || command -v py 2>/dev/null)
+PYTHON=$(command -v python3 2>/dev/null || command -v python 2>/dev/null || echo "py -3.13")
 nohup "$PYTHON" -m uvicorn notify_bridge_server.main:app \
   --host 0.0.0.0 --port 8420 > /dev/null 2>&1 &