feat(i18n): add Russian translations + replace Frappe branding with IIE

Branding:
- 'Powered by Learning' -> 'Powered by IIE' (sidebar tooltip)
- 'Frappe Learning' -> 'IIE' (HelpModal title, email templates)
- frappe.io URLs -> enlightrussia.ru
- 'Install Frappe Learning' -> 'Установить приложение IIE'
- PersonaForm question translated

Translations (ru.po):
- Added 125 new Russian translations for client-facing strings
- Covers: sidebar nav, profiles, leaderboard, points, lessons,
  batches, assignments, error messages, video stats, MPGU-specific

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/components/InstallPrompt.vue

@@ -1,7 +1,7 @@
 <template>
 	<Dialog v-model="showDialog">
 		<template #body-title>
-			<h2 class="text-lg font-bold">{{ __('Install Frappe Learning') }}</h2>
+			<h2 class="text-lg font-bold">{{ __('Установить приложение IIE') }}</h2>
 		</template>
 		<template #body-content>
 			<p>
@@ -29,7 +29,7 @@
 					class="mb-1 flex flex-row items-center justify-between px-3 text-center"
 				>
 					<span class="text-base font-bold text-gray-900">
-						{{ __('Install Frappe Learning') }}
+						{{ __('Установить приложение IIE') }}
 					</span>
 					<span class="inline-flex items-baseline">
 						<FeatherIcon

frontend/src/components/Modals/EmailTemplateModal.vue

@@ -48,7 +48,7 @@
 					:rows="10"
 					:placeholder="
 						__(
-							'<p>Dear {{ member_name }},</p>\n\n<p>You have been enrolled in our upcoming batch {{ batch_name }}.</p>\n\n<p>Thanks,</p>\n<p>Frappe Learning</p>'
+							'<p>Dear {{ member_name }},</p>\n\n<p>You have been enrolled in our upcoming batch {{ batch_name }}.</p>\n\n<p>Thanks,</p>\n<p>IIE</p>'
 						)
 					"
 				/>
@@ -64,7 +64,7 @@
 						:fixedMenu="true"
 						:placeholder="
 							__(
-								'Dear {{ member_name }},\n\nYou have been enrolled in our upcoming batch {{ batch_name }}.\n\nThanks,\nFrappe Learning'
+								'Dear {{ member_name }},\n\nYou have been enrolled in our upcoming batch {{ batch_name }}.\n\nThanks,\nIIE'
 							)
 						"
 						editorClass="prose-sm max-w-none border-b border-x border-outline-gray-modals bg-surface-gray-2 rounded-b-md py-1 px-2 min-h-[7rem] max-h-[18rem] overflow-y-auto"

frontend/src/components/Sidebar/AppSidebar.vue

@@ -132,7 +132,7 @@
 							</div>
 						</template>
 					</Tooltip>
-					<Tooltip :text="__('Powered by Learning')">
+					<Tooltip :text="__('Powered by IIE')">
 						<Zap
 							class="size-4 stroke-1.5 text-ink-gray-7 cursor-pointer"
 							@click="redirectToWebsite()"
@@ -170,13 +170,13 @@
 			v-model="showHelpModal"
 			v-model:articles="articles"
 			appName="learning"
-			title="Frappe Learning"
+			title="IIE"
 			:logo="LMSLogo"
 			:afterSkip="(step) => capture('onboarding_step_skipped_' + step)"
 			:afterSkipAll="() => capture('onboarding_steps_skipped')"
 			:afterReset="(step) => capture('onboarding_step_reset_' + step)"
 			:afterResetAll="() => capture('onboarding_steps_reset')"
-			docsLink="https://docs.frappe.io/learning"
+			docsLink="https://enlightrussia.ru"
 		/>
 		<IntermediateStepModal
 			v-model="showIntermediateModal"
@@ -680,7 +680,7 @@ const updateSidebarLinks = () => {
 }
 
 const redirectToWebsite = () => {
-	window.open('https://frappe.io/learning', '_blank')
+	window.open('https://enlightrussia.ru', '_blank')
 }
 
 onUnmounted(() => {

frontend/src/pages/PersonaForm.vue

@@ -18,7 +18,7 @@
 
 				<div class="mb-5">
 					<div class="text-sm text-gray-700 mb-2">
-						{{ __('What is your use case for Frappe Learning?') }}
+						{{ __('Чем вы занимаетесь на платформе?') }}
 					</div>
 					<FormControl
 						v-model="persona.useCase"