feat: collapse days hides map markers, Immich test-before-save (#216)

Map markers:
- Collapsing a day in the sidebar hides its places from the map
- Places assigned to multiple days only hide when all days collapsed
- Unplanned places always stay visible

Immich settings:
- New POST /integrations/immich/test endpoint validates credentials
  without saving them
- Save button disabled until test connection passes
- Changing URL or API key resets test status
- i18n: testFirst key for all 12 languages

client/src/i18n/translations/ar.ts

@@ -1341,6 +1341,7 @@ const ar: Record<string, string | { name: string; category: string }[]> = {
   'memories.immichUrl': 'عنوان خادم Immich',
   'memories.immichApiKey': 'مفتاح API',
   'memories.testConnection': 'اختبار الاتصال',
+  'memories.testFirst': 'اختبر الاتصال أولاً',
   'memories.connected': 'متصل',
   'memories.disconnected': 'غير متصل',
   'memories.connectionSuccess': 'تم الاتصال بـ Immich',

client/src/i18n/translations/br.ts

@@ -1392,6 +1392,7 @@ const br: Record<string, string | { name: string; category: string }[]> = {
   'memories.immichUrl': 'URL do servidor Immich',
   'memories.immichApiKey': 'Chave da API',
   'memories.testConnection': 'Testar conexão',
+  'memories.testFirst': 'Teste a conexão primeiro',
   'memories.connected': 'Conectado',
   'memories.disconnected': 'Não conectado',
   'memories.connectionSuccess': 'Conectado ao Immich',

client/src/i18n/translations/cs.ts

@@ -1341,6 +1341,7 @@ const cs: Record<string, string | { name: string; category: string }[]> = {
   'memories.immichUrl': 'URL serveru Immich',
   'memories.immichApiKey': 'API klíč',
   'memories.testConnection': 'Otestovat připojení',
+  'memories.testFirst': 'Nejprve otestujte připojení',
   'memories.connected': 'Připojeno',
   'memories.disconnected': 'Nepřipojeno',
   'memories.connectionSuccess': 'Připojeno k Immich',

client/src/i18n/translations/de.ts

@@ -1338,6 +1338,7 @@ const de: Record<string, string | { name: string; category: string }[]> = {
   'memories.immichUrl': 'Immich Server URL',
   'memories.immichApiKey': 'API-Schlüssel',
   'memories.testConnection': 'Verbindung testen',
+  'memories.testFirst': 'Verbindung zuerst testen',
   'memories.connected': 'Verbunden',
   'memories.disconnected': 'Nicht verbunden',
   'memories.connectionSuccess': 'Verbindung zu Immich hergestellt',

client/src/i18n/translations/en.ts

@@ -1335,6 +1335,7 @@ const en: Record<string, string | { name: string; category: string }[]> = {
   'memories.immichUrl': 'Immich Server URL',
   'memories.immichApiKey': 'API Key',
   'memories.testConnection': 'Test connection',
+  'memories.testFirst': 'Test connection first',
   'memories.connected': 'Connected',
   'memories.disconnected': 'Not connected',
   'memories.connectionSuccess': 'Connected to Immich',

client/src/i18n/translations/es.ts

@@ -1291,6 +1291,7 @@ const es: Record<string, string> = {
   'memories.immichUrl': 'URL del servidor Immich',
   'memories.immichApiKey': 'Clave API',
   'memories.testConnection': 'Probar conexión',
+  'memories.testFirst': 'Probar conexión primero',
   'memories.connected': 'Conectado',
   'memories.disconnected': 'No conectado',
   'memories.connectionSuccess': 'Conectado a Immich',

client/src/i18n/translations/fr.ts

@@ -1337,6 +1337,7 @@ const fr: Record<string, string> = {
   'memories.immichUrl': 'URL du serveur Immich',
   'memories.immichApiKey': 'Clé API',
   'memories.testConnection': 'Tester la connexion',
+  'memories.testFirst': 'Testez la connexion avant de sauvegarder',
   'memories.connected': 'Connecté',
   'memories.disconnected': 'Non connecté',
   'memories.connectionSuccess': 'Connecté à Immich',

client/src/i18n/translations/hu.ts

@@ -1408,6 +1408,7 @@ const hu: Record<string, string | { name: string; category: string }[]> = {
   'memories.immichUrl': 'Immich szerver URL',
   'memories.immichApiKey': 'API kulcs',
   'memories.testConnection': 'Kapcsolat tesztelése',
+  'memories.testFirst': 'Először teszteld a kapcsolatot',
   'memories.connected': 'Csatlakoztatva',
   'memories.disconnected': 'Nincs csatlakoztatva',
   'memories.connectionSuccess': 'Csatlakozva az Immichhez',

client/src/i18n/translations/it.ts

@@ -1338,6 +1338,7 @@ const it: Record<string, string | { name: string; category: string }[]> = {
   'memories.immichUrl': 'URL Server Immich',
   'memories.immichApiKey': 'Chiave API',
   'memories.testConnection': 'Test connessione',
+  'memories.testFirst': 'Testa prima la connessione',
   'memories.connected': 'Connesso',
   'memories.disconnected': 'Non connesso',
   'memories.connectionSuccess': 'Connesso a Immich',

client/src/i18n/translations/nl.ts

@@ -1337,6 +1337,7 @@ const nl: Record<string, string> = {
   'memories.immichUrl': 'Immich Server URL',
   'memories.immichApiKey': 'API-sleutel',
   'memories.testConnection': 'Verbinding testen',
+  'memories.testFirst': 'Test eerst de verbinding',
   'memories.connected': 'Verbonden',
   'memories.disconnected': 'Niet verbonden',
   'memories.connectionSuccess': 'Verbonden met Immich',

client/src/i18n/translations/ru.ts

@@ -1337,6 +1337,7 @@ const ru: Record<string, string> = {
   'memories.immichUrl': 'URL сервера Immich',
   'memories.immichApiKey': 'API-ключ',
   'memories.testConnection': 'Проверить подключение',
+  'memories.testFirst': 'Сначала проверьте подключение',
   'memories.connected': 'Подключено',
   'memories.disconnected': 'Не подключено',
   'memories.connectionSuccess': 'Подключение к Immich установлено',

client/src/i18n/translations/zh.ts

@@ -1337,6 +1337,7 @@ const zh: Record<string, string> = {
   'memories.immichUrl': 'Immich 服务器地址',
   'memories.immichApiKey': 'API 密钥',
   'memories.testConnection': '测试连接',
+  'memories.testFirst': '请先测试连接',
   'memories.connected': '已连接',
   'memories.disconnected': '未连接',
   'memories.connectionSuccess': '已连接到 Immich',