feat: add usage onboarding survey overlay (#388)

* feat: add usage-survey feedback types and gating function

Claude-Session: https://claude.ai/code/session_01KAC9Lbx8AmebAnj9WQZXHp

* feat: add onboarding usage-survey i18n strings to all locales

Relabels three ambiguous feedback.usageTypes values (personal/team_internal/
business_workflow) and adds a new onboarding namespace (4 keys) across the
reference locale and all 20 translations, so the tree compiles at every
commit instead of only after both locale groups land.

Claude-Session: https://claude.ai/code/session_01KAC9Lbx8AmebAnj9WQZXHp

* feat: add UsageSurveyOverlay component

* feat: mount UsageSurveyOverlay inside AuthGuard

Claude-Session: https://claude.ai/code/session_01KAC9Lbx8AmebAnj9WQZXHp

* fix: use text-start instead of text-left for RTL support in UsageSurveyOverlay

* refactor: drop redundant usage-type field from the admin feedback dialog

Claude-Session: https://claude.ai/code/session_01KAC9Lbx8AmebAnj9WQZXHp

* feat: accept onboarding source and survey id in the feedback route

Claude-Session: https://claude.ai/code/session_01KAC9Lbx8AmebAnj9WQZXHp

* test: cover the onboarding source in the feedback route integration test

Claude-Session: https://claude.ai/code/session_01KAC9Lbx8AmebAnj9WQZXHp

* chore: remove orphaned usageTypeLabel i18n key

* refactor: derive feedback source/survey_id enums from a single source of truth

* perf: skip the settings fetch in UsageSurveyOverlay for non-admin users

packages/shared/src/i18n/ru.ts

@@ -80,7 +80,6 @@ export const ru: TranslationKeys = {
     adminCardDescription:
       "A quick note from admins helps us improve Docker, source installs, and docs.",
     installMethodLabel: "Install method",
-    usageTypeLabel: "Use case",
     frictionAreaLabel: "Hardest setup area",
     importantAreasLabel: "Most important areas",
     sentiments: {
@@ -107,9 +106,9 @@ export const ru: TranslationKeys = {
       other: "Other",
     },
     usageTypes: {
-      personal: "Personal",
-      team_internal: "Team/internal",
-      business_workflow: "Business workflow",
+      personal: "Только я",
+      team_internal: "Небольшая команда",
+      business_workflow: "Компания или организация",
       education: "Education",
       evaluating: "Evaluating",
     },
@@ -133,6 +132,12 @@ export const ru: TranslationKeys = {
       ai_tools: "AI tools",
     },
   },
+  onboarding: {
+    usageSurveyTitle: "Как вы используете SnapOtter?",
+    usageSurveyToolsLabel: "Что для вас важнее всего?",
+    pickAnyHint: "(выберите любое количество)",
+    continueLabel: "Продолжить",
+  },
   categories: {
     essentials: "Основные",
     adjustments: "Коррекция",