feat(recipes): delegate CivitAI-image re-import to companion browser extension

Recipes imported from CivitAI image URLs can contain 0 LoRAs: the backend
only sees the REST image API + EXIF, while the complete generation data
lives in the image page's internal trpc payload (see
docs/recipe-civitai-image-no-metadata.md). When the companion
lm-civitai-extension is installed with a valid license, re-import (single
and bulk) of CivitAI-image-sourced recipes is now delegated to the
extension via DOM CustomEvents; the extension scrapes the image page with
the user's session and calls back into the reimport endpoint with the
full metadata payload. Without the extension (or with an invalid license)
the native path runs unchanged.

- POST /api/lm/recipe/{id}/reimport accepts optional payload params
  (image_url/name/resources/gen_params/base_model/tags); the payload path
  reuses the import-remote engine with reimport semantics (user-edit
  carryover, delete-after-save), and malformed/failed payloads fall back
  to the legacy URL import. Response gains loras_count.
- The endpoint also accepts GET: the extension is GET-only by convention
  (documented in AGENTS.md).
- New static/js/utils/extensionReimportBridge.js (probeExtension /
  delegateReimport / getCivitaiImageInfo) wired into RecipeContextMenu
  and BulkManager with silent native fallback.
- i18n: toast.recipes.reimportingViaExtension added and translated in
  all 9 locales.

locales/ko.json

@@ -2229,6 +2229,7 @@
             "rematchSkipped": "선택한 {total}개 레시피는 재매칭이 필요하지 않습니다",
             "rematchFailed": "선택한 레시피 재매칭 실패: {message}",
             "reimporting": "소스에서 레시피를 다시 가져오는 중...",
+            "reimportingViaExtension": "브라우저 확장 프로그램을 통해 레시피를 다시 가져오는 중 ({current}/{total})...",
             "reimportSuccess": "레시피를 다시 가져왔습니다",
             "reimportBulkComplete": "다시 가져오기 완료: {completed}개 성공, {failed}개 실패 (총 {total}개)",
             "reimportBulkFailed": "일부 레시피를 다시 가져오지 못했습니다",