* 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
Adds a prefilled 'Request a tool' affordance to the home search empty state and beneath weak results. Opens the in-app feedback dialog with a new search_miss source and a structured search_query when analytics is on; links to a prefilled GitHub Discussions (Ideas) post when off, so a request is never silently dropped. Reuses the existing feedback pipe, dialog, and analytics gate; no new storage. i18n across all 21 locales.