improvement(media-gen): retire vision block, add hosted key for fal ai for image/video gen, search visibility in cmd-k #4684

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Final Result: Bugbot completed review - no issues found! ✅

Request ID: serverGenReqId_eeb3d160-787c-47a9-8e99-e8f609cb32eb

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^{Reviewed by Cursor Bugbot for commit 3c7fd57. Configure here.}