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seo: boost natural referencing — crosslinks ecosystem ArtelTaleb

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fix: corriger metalness via Material API model-viewer au chargement (preview blanc)

fix: environment-image neutral→legacy + tone-mapping commerce→neutral pour corriger matériaux métalliques blancs

fix: short_description 60 chars max

feat: AR mobile optimizations + README punchline

feat: static models.json + localStorage cache 24h

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docs: 30 SEO tags

docs: SEO README EN — ARTEL3D AR Studio

fix: hf color metadata

feat: ARTEL3D AR Studio

chore: configure git lfs

initial commit