fix: NUT template preview + tracking config event checkboxes

- Add NUT variables to _SAMPLE_CONTEXT (fixes ups_name undefined in preview)
- Add NUT event tracking checkboxes to tracking config form
- Add NUT event i18n keys (EN + RU)

frontend/src/lib/i18n/en.json

@@ -112,6 +112,7 @@
 		"typePlanka": "Planka",
 		"typeScheduler": "Scheduler",
 		"typeNut": "NUT (UPS)",
+		"typeGooglePhotos": "Google Photos",
 		"loadError": "Failed to load providers.",
 		"externalDomain": "External Domain",
 		"optional": "optional",
@@ -135,6 +136,13 @@
 		"nutPassword": "Password",
 		"nutUsernameHint": "Optional — only needed if upsd requires authentication",
 		"nutPasswordHint": "Optional — upsd user password",
+		"gpClientId": "OAuth Client ID",
+		"gpClientSecret": "OAuth Client Secret",
+		"gpClientSecretKeep": "OAuth Client Secret (leave empty to keep current)",
+		"gpRefreshToken": "Refresh Token",
+		"gpRefreshTokenKeep": "Refresh Token (leave empty to keep current)",
+		"gpRefreshTokenHint": "Obtain from Google OAuth Playground (developers.google.com/oauthplayground) with the Photos Library API scope.",
+		"gpAllFieldsRequired": "Client ID, Client Secret, and Refresh Token are all required",
 		"testAndSave": "Test & Save",
 		"saveWithoutTest": "Save without testing"
 	},
@@ -422,6 +430,14 @@
 		"attachmentCreated": "Attachment added",
 		"cardLabelAdded": "Label added",
 		"taskCompleted": "Task completed",
+		"upsOnline": "UPS online (mains restored)",
+		"upsOnBattery": "UPS on battery",
+		"upsLowBattery": "Low battery",
+		"upsBatteryRestored": "Battery recovered",
+		"upsCommsLost": "Communication lost",
+		"upsCommsRestored": "Communication restored",
+		"upsReplaceBattery": "Replace battery",
+		"upsOverload": "UPS overloaded",
 		"scheduledMessage": "Scheduled message",
 		"trackImages": "Track images",
 		"trackVideos": "Track videos",
@@ -841,7 +857,8 @@
 		"providerGitea": "Self-hosted Git service",
 		"providerPlanka": "Self-hosted Kanban board",
 		"providerScheduler": "Time-based scheduled messages",
-		"providerNut": "Network UPS monitoring"
+		"providerNut": "Network UPS monitoring",
+		"providerGooglePhotos": "Google Photos albums & shared libraries"
 	},
 	"error": {
 		"notFound": "Page not found",