diff --git a/.gitignore b/.gitignore
index be7cacb..5012480 100644
--- a/.gitignore
+++ b/.gitignore
@@ -55,3 +55,6 @@ llm-api/*.pyc
 # Legacy RAG index (ChromaDB) — obsolete depuis bascule graph+BM25
 /chroma-index/
 
+# Téléchargements + WebP générés par strapi_extraction/media-sync/ (poids important)
+strapi_extraction/extract/media-sync-work/
+
diff --git a/app/components/ContentSection.tsx b/app/components/ContentSection.tsx
index fb2a531..a0a0e94 100644
--- a/app/components/ContentSection.tsx
+++ b/app/components/ContentSection.tsx
@@ -6,6 +6,7 @@ import { fetchData } from "../utils/fetchData";
 import { getApiUrl } from "../utils/getApiUrl";
 import Carousel from "./Carousel";
 import ReactMarkdown from "react-markdown";
+import remarkGfm from "remark-gfm";
 
 interface ImageData {
   url: string;
@@ -211,7 +212,7 @@ export default function ContentSection({
               prose-li:marker:text-primary
               prose-hr:border-0 prose-hr:w-16 prose-hr:mx-auto prose-hr:bg-primary/30 prose-hr:h-0.5 prose-hr:rounded-full prose-hr:my-6"
           >
-            <ReactMarkdown>{richText}</ReactMarkdown>
+            <ReactMarkdown remarkPlugins={[remarkGfm]}>{richText}</ReactMarkdown>
           </div>
         )}
 
diff --git a/docs-site-interne/06-strapi-extraction.md b/docs-site-interne/06-strapi-extraction.md
index f3cb9da..eb1131c 100644
--- a/docs-site-interne/06-strapi-extraction.md
+++ b/docs-site-interne/06-strapi-extraction.md
@@ -1,6 +1,6 @@
 # Outils `strapi_extraction/`
 
-**Dernière mise à jour :** 2026-04-22
+**Dernière mise à jour :** 2026-04-28
 
 Dossier de **scripts Node + Python** pour extraire, nettoyer et convertir les
 données issues de l'API Strapi en base de connaissance chatbot (hors runtime
@@ -84,8 +84,18 @@ comme source de vérité sans comparer au CMS.
 Ces points seront corrigés en même temps que l'enrichissement du vault
 (glossaire + homepage Strapi → notes `40-Glossaire/` et `30-Parcours/`).
 
+## Sync médias WebP (hors pipeline GrasBot)
+
+Dossier **`strapi_extraction/media-sync/`** — inventaire des fichiers image liés aux
+content-types (`projects`, `competences`, `homepages`, `realisation-ias`, `glossaires`),
+téléchargement classé par rubrique, conversion WebP (sharp), puis ré-upload optionnel.
+
+Documentation : voir `strapi_extraction/media-sync/README.md`.  
+Sortie lourde (ignorée Git) : `strapi_extraction/extract/media-sync-work/`.
+
 ## Liens complémentaires
 
 - Vault + retrieval : [`08-vault-obsidian-retrieval.md`](./08-vault-obsidian-retrieval.md)
 - API LLM : [`04-api-llm-et-chatbot.md`](./04-api-llm-et-chatbot.md)
 - Schémas Strapi : [`03-cms-strapi.md`](./03-cms-strapi.md)
+- Performances images (audit) : [`09-performances-images.md`](./09-performances-images.md)
diff --git a/package-lock.json b/package-lock.json
index c3bf24f..a6e9f48 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -30,6 +30,7 @@
         "@types/react": "^19",
         "@types/react-dom": "^19",
         "postcss": "^8",
+        "sharp": "^0.33.5",
         "tailwindcss": "^3.4.1",
         "typescript": "^5"
       }
@@ -47,9 +48,9 @@
       }
     },
     "node_modules/@emnapi/runtime": {
-      "version": "1.8.1",
-      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.8.1.tgz",
-      "integrity": "sha512-mehfKSMWjjNol8659Z8KxEMrdSJDDot5SXMq00dM8BN4o+CLNXQ0xH2V7EchNHV4RmbZLmmPdEaXZc5H2FXmDg==",
+      "version": "1.10.0",
+      "resolved": "https://registry.npmjs.org/@emnapi/runtime/-/runtime-1.10.0.tgz",
+      "integrity": "sha512-ewvYlk86xUoGI0zQRNq/mC+16R1QeDlKQy21Ki3oSYXNgLb45GV1P6A0M+/s6nyCuNDqe5VpaY84BzXGwVbwFA==",
       "license": "MIT",
       "optional": true,
       "dependencies": {
@@ -57,9 +58,9 @@
       }
     },
     "node_modules/@img/colour": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/@img/colour/-/colour-1.0.0.tgz",
-      "integrity": "sha512-A5P/LfWGFSl6nsckYtjw9da+19jB8hkJ6ACTGcDfEJ0aE+l2n2El7dsVM7UVHZQ9s2lmYMWlrS21YLy2IR1LUw==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/@img/colour/-/colour-1.1.0.tgz",
+      "integrity": "sha512-Td76q7j57o/tLVdgS746cYARfSyxk8iEfRxewL9h4OMzYhbW4TAcppl0mT4eyqXddh6L/jwoM75mo7ixa/pCeQ==",
       "license": "MIT",
       "optional": true,
       "engines": {
@@ -67,12 +68,13 @@
       }
     },
     "node_modules/@img/sharp-darwin-arm64": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/@img/sharp-darwin-arm64/-/sharp-darwin-arm64-0.34.5.tgz",
-      "integrity": "sha512-imtQ3WMJXbMY4fxb/Ndp6HBTNVtWCUI0WdobyheGf5+ad6xX8VIDO8u2xE4qc/fr08CKG/7dDseFtn6M6g/r3w==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-darwin-arm64/-/sharp-darwin-arm64-0.33.5.tgz",
+      "integrity": "sha512-UT4p+iz/2H4twwAoLCqfA9UH5pI6DggwKEGuaPy7nCVQ8ZsiY5PIcrRvD1DzuY3qYL07NtIQcWnBSY/heikIFQ==",
       "cpu": [
         "arm64"
       ],
+      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "os": [
@@ -85,16 +87,17 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-libvips-darwin-arm64": "1.2.4"
+        "@img/sharp-libvips-darwin-arm64": "1.0.4"
       }
     },
     "node_modules/@img/sharp-darwin-x64": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/@img/sharp-darwin-x64/-/sharp-darwin-x64-0.34.5.tgz",
-      "integrity": "sha512-YNEFAF/4KQ/PeW0N+r+aVVsoIY0/qxxikF2SWdp+NRkmMB7y9LBZAVqQ4yhGCm/H3H270OSykqmQMKLBhBJDEw==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-darwin-x64/-/sharp-darwin-x64-0.33.5.tgz",
+      "integrity": "sha512-fyHac4jIc1ANYGRDxtiqelIbdWkIuQaI84Mv45KvGRRxSAa7o7d1ZKAOBaYbnepLC1WqxfpimdeWfvqqSGwR2Q==",
       "cpu": [
         "x64"
       ],
+      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "os": [
@@ -107,16 +110,17 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-libvips-darwin-x64": "1.2.4"
+        "@img/sharp-libvips-darwin-x64": "1.0.4"
       }
     },
     "node_modules/@img/sharp-libvips-darwin-arm64": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-darwin-arm64/-/sharp-libvips-darwin-arm64-1.2.4.tgz",
-      "integrity": "sha512-zqjjo7RatFfFoP0MkQ51jfuFZBnVE2pRiaydKJ1G/rHZvnsrHAOcQALIi9sA5co5xenQdTugCvtb1cuf78Vf4g==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-darwin-arm64/-/sharp-libvips-darwin-arm64-1.0.4.tgz",
+      "integrity": "sha512-XblONe153h0O2zuFfTAbQYAX2JhYmDHeWikp1LM9Hul9gVPjFY427k6dFEcOL72O01QxQsWi761svJ/ev9xEDg==",
       "cpu": [
         "arm64"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -127,12 +131,13 @@
       }
     },
     "node_modules/@img/sharp-libvips-darwin-x64": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-darwin-x64/-/sharp-libvips-darwin-x64-1.2.4.tgz",
-      "integrity": "sha512-1IOd5xfVhlGwX+zXv2N93k0yMONvUlANylbJw1eTah8K/Jtpi15KC+WSiaX/nBmbm2HxRM1gZ0nSdjSsrZbGKg==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-darwin-x64/-/sharp-libvips-darwin-x64-1.0.4.tgz",
+      "integrity": "sha512-xnGR8YuZYfJGmWPvmlunFaWJsb9T/AO2ykoP3Fz/0X5XV2aoYBPkX6xqCQvUTKKiLddarLaxpzNe+b1hjeWHAQ==",
       "cpu": [
         "x64"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -143,12 +148,13 @@
       }
     },
     "node_modules/@img/sharp-libvips-linux-arm": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-arm/-/sharp-libvips-linux-arm-1.2.4.tgz",
-      "integrity": "sha512-bFI7xcKFELdiNCVov8e44Ia4u2byA+l3XtsAj+Q8tfCwO6BQ8iDojYdvoPMqsKDkuoOo+X6HZA0s0q11ANMQ8A==",
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-arm/-/sharp-libvips-linux-arm-1.0.5.tgz",
+      "integrity": "sha512-gvcC4ACAOPRNATg/ov8/MnbxFDJqf/pDePbBnuBDcjsI8PssmjoKMAz4LtLaVi+OnSb5FK/yIOamqDwGmXW32g==",
       "cpu": [
         "arm"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -159,12 +165,13 @@
       }
     },
     "node_modules/@img/sharp-libvips-linux-arm64": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-arm64/-/sharp-libvips-linux-arm64-1.2.4.tgz",
-      "integrity": "sha512-excjX8DfsIcJ10x1Kzr4RcWe1edC9PquDRRPx3YVCvQv+U5p7Yin2s32ftzikXojb1PIFc/9Mt28/y+iRklkrw==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-arm64/-/sharp-libvips-linux-arm64-1.0.4.tgz",
+      "integrity": "sha512-9B+taZ8DlyyqzZQnoeIvDVR/2F4EbMepXMc/NdVbkzsJbzkUjhXv/70GQJ7tdLA4YJgNP25zukcxpX2/SueNrA==",
       "cpu": [
         "arm64"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -207,12 +214,13 @@
       }
     },
     "node_modules/@img/sharp-libvips-linux-s390x": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-s390x/-/sharp-libvips-linux-s390x-1.2.4.tgz",
-      "integrity": "sha512-qmp9VrzgPgMoGZyPvrQHqk02uyjA0/QrTO26Tqk6l4ZV0MPWIW6LTkqOIov+J1yEu7MbFQaDpwdwJKhbJvuRxQ==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-s390x/-/sharp-libvips-linux-s390x-1.0.4.tgz",
+      "integrity": "sha512-u7Wz6ntiSSgGSGcjZ55im6uvTrOxSIS8/dgoVMoiGE9I6JAfU50yH5BoDlYA1tcuGS7g/QNtetJnxA6QEsCVTA==",
       "cpu": [
         "s390x"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -223,12 +231,13 @@
       }
     },
     "node_modules/@img/sharp-libvips-linux-x64": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-x64/-/sharp-libvips-linux-x64-1.2.4.tgz",
-      "integrity": "sha512-tJxiiLsmHc9Ax1bz3oaOYBURTXGIRDODBqhveVHonrHJ9/+k89qbLl0bcJns+e4t4rvaNBxaEZsFtSfAdquPrw==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linux-x64/-/sharp-libvips-linux-x64-1.0.4.tgz",
+      "integrity": "sha512-MmWmQ3iPFZr0Iev+BAgVMb3ZyC4KeFc3jFxnNbEPas60e1cIfevbtuyf9nDGIzOaW9PdnDciJm+wFFaTlj5xYw==",
       "cpu": [
         "x64"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -239,12 +248,13 @@
       }
     },
     "node_modules/@img/sharp-libvips-linuxmusl-arm64": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linuxmusl-arm64/-/sharp-libvips-linuxmusl-arm64-1.2.4.tgz",
-      "integrity": "sha512-FVQHuwx1IIuNow9QAbYUzJ+En8KcVm9Lk5+uGUQJHaZmMECZmOlix9HnH7n1TRkXMS0pGxIJokIVB9SuqZGGXw==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linuxmusl-arm64/-/sharp-libvips-linuxmusl-arm64-1.0.4.tgz",
+      "integrity": "sha512-9Ti+BbTYDcsbp4wfYib8Ctm1ilkugkA/uscUn6UXK1ldpC1JjiXbLfFZtRlBhjPZ5o1NCLiDbg8fhUPKStHoTA==",
       "cpu": [
         "arm64"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -255,12 +265,13 @@
       }
     },
     "node_modules/@img/sharp-libvips-linuxmusl-x64": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linuxmusl-x64/-/sharp-libvips-linuxmusl-x64-1.2.4.tgz",
-      "integrity": "sha512-+LpyBk7L44ZIXwz/VYfglaX/okxezESc6UxDSoyo2Ks6Jxc4Y7sGjpgU9s4PMgqgjj1gZCylTieNamqA1MF7Dg==",
+      "version": "1.0.4",
+      "resolved": "https://registry.npmjs.org/@img/sharp-libvips-linuxmusl-x64/-/sharp-libvips-linuxmusl-x64-1.0.4.tgz",
+      "integrity": "sha512-viYN1KX9m+/hGkJtvYYp+CCLgnJXwiQB39damAO7WMdKWlIhmYTfHjwSbQeUK/20vY154mwezd9HflVFM1wVSw==",
       "cpu": [
         "x64"
       ],
+      "dev": true,
       "license": "LGPL-3.0-or-later",
       "optional": true,
       "os": [
@@ -271,12 +282,13 @@
       }
     },
     "node_modules/@img/sharp-linux-arm": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/@img/sharp-linux-arm/-/sharp-linux-arm-0.34.5.tgz",
-      "integrity": "sha512-9dLqsvwtg1uuXBGZKsxem9595+ujv0sJ6Vi8wcTANSFpwV/GONat5eCkzQo/1O6zRIkh0m/8+5BjrRr7jDUSZw==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-linux-arm/-/sharp-linux-arm-0.33.5.tgz",
+      "integrity": "sha512-JTS1eldqZbJxjvKaAkxhZmBqPRGmxgu+qFKSInv8moZ2AmT5Yib3EQ1c6gp493HvrvV8QgdOXdyaIBrhvFhBMQ==",
       "cpu": [
         "arm"
       ],
+      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "os": [
@@ -289,16 +301,17 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-libvips-linux-arm": "1.2.4"
+        "@img/sharp-libvips-linux-arm": "1.0.5"
       }
     },
     "node_modules/@img/sharp-linux-arm64": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/@img/sharp-linux-arm64/-/sharp-linux-arm64-0.34.5.tgz",
-      "integrity": "sha512-bKQzaJRY/bkPOXyKx5EVup7qkaojECG6NLYswgktOZjaXecSAeCWiZwwiFf3/Y+O1HrauiE3FVsGxFg8c24rZg==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-linux-arm64/-/sharp-linux-arm64-0.33.5.tgz",
+      "integrity": "sha512-JMVv+AMRyGOHtO1RFBiJy/MBsgz0x4AWrT6QoEVVTyh1E39TrCUpTRI7mx9VksGX4awWASxqCYLCV4wBZHAYxA==",
       "cpu": [
         "arm64"
       ],
+      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "os": [
@@ -311,7 +324,7 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-libvips-linux-arm64": "1.2.4"
+        "@img/sharp-libvips-linux-arm64": "1.0.4"
       }
     },
     "node_modules/@img/sharp-linux-ppc64": {
@@ -359,12 +372,13 @@
       }
     },
     "node_modules/@img/sharp-linux-s390x": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/@img/sharp-linux-s390x/-/sharp-linux-s390x-0.34.5.tgz",
-      "integrity": "sha512-nQtCk0PdKfho3eC5MrbQoigJ2gd1CgddUMkabUj+rBevs8tZ2cULOx46E7oyX+04WGfABgIwmMC0VqieTiR4jg==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-linux-s390x/-/sharp-linux-s390x-0.33.5.tgz",
+      "integrity": "sha512-y/5PCd+mP4CA/sPDKl2961b+C9d+vPAveS33s6Z3zfASk2j5upL6fXVPZi7ztePZ5CuH+1kW8JtvxgbuXHRa4Q==",
       "cpu": [
         "s390x"
       ],
+      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "os": [
@@ -377,16 +391,17 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-libvips-linux-s390x": "1.2.4"
+        "@img/sharp-libvips-linux-s390x": "1.0.4"
       }
     },
     "node_modules/@img/sharp-linux-x64": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/@img/sharp-linux-x64/-/sharp-linux-x64-0.34.5.tgz",
-      "integrity": "sha512-MEzd8HPKxVxVenwAa+JRPwEC7QFjoPWuS5NZnBt6B3pu7EG2Ge0id1oLHZpPJdn3OQK+BQDiw9zStiHBTJQQQQ==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-linux-x64/-/sharp-linux-x64-0.33.5.tgz",
+      "integrity": "sha512-opC+Ok5pRNAzuvq1AG0ar+1owsu842/Ab+4qvU879ippJBHvyY5n2mxF1izXqkPYlGuP/M556uh53jRLJmzTWA==",
       "cpu": [
         "x64"
       ],
+      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "os": [
@@ -399,16 +414,17 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-libvips-linux-x64": "1.2.4"
+        "@img/sharp-libvips-linux-x64": "1.0.4"
       }
     },
     "node_modules/@img/sharp-linuxmusl-arm64": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/@img/sharp-linuxmusl-arm64/-/sharp-linuxmusl-arm64-0.34.5.tgz",
-      "integrity": "sha512-fprJR6GtRsMt6Kyfq44IsChVZeGN97gTD331weR1ex1c1rypDEABN6Tm2xa1wE6lYb5DdEnk03NZPqA7Id21yg==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-linuxmusl-arm64/-/sharp-linuxmusl-arm64-0.33.5.tgz",
+      "integrity": "sha512-XrHMZwGQGvJg2V/oRSUfSAfjfPxO+4DkiRh6p2AFjLQztWUuY/o8Mq0eMQVIY7HJ1CDQUJlxGGZRw1a5bqmd1g==",
       "cpu": [
         "arm64"
       ],
+      "dev": true,
       "license": "Apache-2.0",
       "optional": true,
       "os": [
@@ -421,16 +437,17 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-libvips-linuxmusl-arm64": "1.2.4"
+        "@img/sharp-libvips-linuxmusl-arm64": "1.0.4"
       }
     },
     "node_modules/@img/sharp-linuxmusl-x64": {
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+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
+    "node_modules/next/node_modules/@img/sharp-win32-ia32": {
+      "version": "0.34.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-win32-ia32/-/sharp-win32-ia32-0.34.5.tgz",
+      "integrity": "sha512-FV9m/7NmeCmSHDD5j4+4pNI8Cp3aW+JvLoXcTUo0IqyjSfAZJ8dIUmijx1qaJsIiU+Hosw6xM5KijAWRJCSgNg==",
+      "cpu": [
+        "ia32"
+      ],
+      "license": "Apache-2.0 AND LGPL-3.0-or-later",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
+    "node_modules/next/node_modules/@img/sharp-win32-x64": {
+      "version": "0.34.5",
+      "resolved": "https://registry.npmjs.org/@img/sharp-win32-x64/-/sharp-win32-x64-0.34.5.tgz",
+      "integrity": "sha512-+29YMsqY2/9eFEiW93eqWnuLcWcufowXewwSNIT6UwZdUUCrM3oFjMWH/Z6/TMmb4hlFenmfAVbpWeup2jryCw==",
+      "cpu": [
+        "x64"
+      ],
+      "license": "Apache-2.0 AND LGPL-3.0-or-later",
+      "optional": true,
+      "os": [
+        "win32"
+      ],
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      }
+    },
     "node_modules/next/node_modules/postcss": {
       "version": "8.4.31",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.31.tgz",
@@ -3086,6 +3499,51 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/next/node_modules/sharp": {
+      "version": "0.34.5",
+      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.34.5.tgz",
+      "integrity": "sha512-Ou9I5Ft9WNcCbXrU9cMgPBcCK8LiwLqcbywW3t4oDV37n1pzpuNLsYiAV8eODnjbtQlSDwZ2cUEeQz4E54Hltg==",
+      "hasInstallScript": true,
+      "license": "Apache-2.0",
+      "optional": true,
+      "dependencies": {
+        "@img/colour": "^1.0.0",
+        "detect-libc": "^2.1.2",
+        "semver": "^7.7.3"
+      },
+      "engines": {
+        "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
+      },
+      "funding": {
+        "url": "https://opencollective.com/libvips"
+      },
+      "optionalDependencies": {
+        "@img/sharp-darwin-arm64": "0.34.5",
+        "@img/sharp-darwin-x64": "0.34.5",
+        "@img/sharp-libvips-darwin-arm64": "1.2.4",
+        "@img/sharp-libvips-darwin-x64": "1.2.4",
+        "@img/sharp-libvips-linux-arm": "1.2.4",
+        "@img/sharp-libvips-linux-arm64": "1.2.4",
+        "@img/sharp-libvips-linux-ppc64": "1.2.4",
+        "@img/sharp-libvips-linux-riscv64": "1.2.4",
+        "@img/sharp-libvips-linux-s390x": "1.2.4",
+        "@img/sharp-libvips-linux-x64": "1.2.4",
+        "@img/sharp-libvips-linuxmusl-arm64": "1.2.4",
+        "@img/sharp-libvips-linuxmusl-x64": "1.2.4",
+        "@img/sharp-linux-arm": "0.34.5",
+        "@img/sharp-linux-arm64": "0.34.5",
+        "@img/sharp-linux-ppc64": "0.34.5",
+        "@img/sharp-linux-riscv64": "0.34.5",
+        "@img/sharp-linux-s390x": "0.34.5",
+        "@img/sharp-linux-x64": "0.34.5",
+        "@img/sharp-linuxmusl-arm64": "0.34.5",
+        "@img/sharp-linuxmusl-x64": "0.34.5",
+        "@img/sharp-wasm32": "0.34.5",
+        "@img/sharp-win32-arm64": "0.34.5",
+        "@img/sharp-win32-ia32": "0.34.5",
+        "@img/sharp-win32-x64": "0.34.5"
+      }
+    },
     "node_modules/normalize-path": {
       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
@@ -3713,8 +4171,8 @@
       "version": "7.7.3",
       "resolved": "https://registry.npmjs.org/semver/-/semver-7.7.3.tgz",
       "integrity": "sha512-SdsKMrI9TdgjdweUSR9MweHA4EJ8YxHn8DFaDisvhVlUOe4BF1tLD7GAj0lIqWVl+dPb/rExr0Btby5loQm20Q==",
+      "devOptional": true,
       "license": "ISC",
-      "optional": true,
       "bin": {
         "semver": "bin/semver.js"
       },
@@ -3723,16 +4181,16 @@
       }
     },
     "node_modules/sharp": {
-      "version": "0.34.5",
-      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.34.5.tgz",
-      "integrity": "sha512-Ou9I5Ft9WNcCbXrU9cMgPBcCK8LiwLqcbywW3t4oDV37n1pzpuNLsYiAV8eODnjbtQlSDwZ2cUEeQz4E54Hltg==",
+      "version": "0.33.5",
+      "resolved": "https://registry.npmjs.org/sharp/-/sharp-0.33.5.tgz",
+      "integrity": "sha512-haPVm1EkS9pgvHrQ/F3Xy+hgcuMV0Wm9vfIBSiwZ05k+xgb0PkBQpGsAA/oWdDobNaZTH5ppvHtzCFbnSEwHVw==",
+      "dev": true,
       "hasInstallScript": true,
       "license": "Apache-2.0",
-      "optional": true,
       "dependencies": {
-        "@img/colour": "^1.0.0",
-        "detect-libc": "^2.1.2",
-        "semver": "^7.7.3"
+        "color": "^4.2.3",
+        "detect-libc": "^2.0.3",
+        "semver": "^7.6.3"
       },
       "engines": {
         "node": "^18.17.0 || ^20.3.0 || >=21.0.0"
@@ -3741,30 +4199,25 @@
         "url": "https://opencollective.com/libvips"
       },
       "optionalDependencies": {
-        "@img/sharp-darwin-arm64": "0.34.5",
-        "@img/sharp-darwin-x64": "0.34.5",
-        "@img/sharp-libvips-darwin-arm64": "1.2.4",
-        "@img/sharp-libvips-darwin-x64": "1.2.4",
-        "@img/sharp-libvips-linux-arm": "1.2.4",
-        "@img/sharp-libvips-linux-arm64": "1.2.4",
-        "@img/sharp-libvips-linux-ppc64": "1.2.4",
-        "@img/sharp-libvips-linux-riscv64": "1.2.4",
-        "@img/sharp-libvips-linux-s390x": "1.2.4",
-        "@img/sharp-libvips-linux-x64": "1.2.4",
-        "@img/sharp-libvips-linuxmusl-arm64": "1.2.4",
-        "@img/sharp-libvips-linuxmusl-x64": "1.2.4",
-        "@img/sharp-linux-arm": "0.34.5",
-        "@img/sharp-linux-arm64": "0.34.5",
-        "@img/sharp-linux-ppc64": "0.34.5",
-        "@img/sharp-linux-riscv64": "0.34.5",
-        "@img/sharp-linux-s390x": "0.34.5",
-        "@img/sharp-linux-x64": "0.34.5",
-        "@img/sharp-linuxmusl-arm64": "0.34.5",
-        "@img/sharp-linuxmusl-x64": "0.34.5",
-        "@img/sharp-wasm32": "0.34.5",
-        "@img/sharp-win32-arm64": "0.34.5",
-        "@img/sharp-win32-ia32": "0.34.5",
-        "@img/sharp-win32-x64": "0.34.5"
+        "@img/sharp-darwin-arm64": "0.33.5",
+        "@img/sharp-darwin-x64": "0.33.5",
+        "@img/sharp-libvips-darwin-arm64": "1.0.4",
+        "@img/sharp-libvips-darwin-x64": "1.0.4",
+        "@img/sharp-libvips-linux-arm": "1.0.5",
+        "@img/sharp-libvips-linux-arm64": "1.0.4",
+        "@img/sharp-libvips-linux-s390x": "1.0.4",
+        "@img/sharp-libvips-linux-x64": "1.0.4",
+        "@img/sharp-libvips-linuxmusl-arm64": "1.0.4",
+        "@img/sharp-libvips-linuxmusl-x64": "1.0.4",
+        "@img/sharp-linux-arm": "0.33.5",
+        "@img/sharp-linux-arm64": "0.33.5",
+        "@img/sharp-linux-s390x": "0.33.5",
+        "@img/sharp-linux-x64": "0.33.5",
+        "@img/sharp-linuxmusl-arm64": "0.33.5",
+        "@img/sharp-linuxmusl-x64": "0.33.5",
+        "@img/sharp-wasm32": "0.33.5",
+        "@img/sharp-win32-ia32": "0.33.5",
+        "@img/sharp-win32-x64": "0.33.5"
       }
     },
     "node_modules/shebang-command": {
@@ -3872,6 +4325,16 @@
         "url": "https://github.com/sponsors/isaacs"
       }
     },
+    "node_modules/simple-swizzle": {
+      "version": "0.2.4",
+      "resolved": "https://registry.npmjs.org/simple-swizzle/-/simple-swizzle-0.2.4.tgz",
+      "integrity": "sha512-nAu1WFPQSMNr2Zn9PGSZK9AGn4t/y97lEm+MXTtUDwfP0ksAIX4nO+6ruD9Jwut4C49SB1Ws+fbXsm/yScWOHw==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "is-arrayish": "^0.3.1"
+      }
+    },
     "node_modules/source-map-js": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/source-map-js/-/source-map-js-1.2.1.tgz",
diff --git a/package.json b/package.json
index a78d7fd..b7e2f9c 100644
--- a/package.json
+++ b/package.json
@@ -6,7 +6,11 @@
     "dev": "next dev --turbopack",
     "build": "next build",
     "start": "next start",
-    "lint": "next lint"
+    "lint": "next lint",
+    "media:inventory": "node strapi_extraction/media-sync/01-fetch-inventory.js",
+    "media:download": "node strapi_extraction/media-sync/02-download.js",
+    "media:webp": "node strapi_extraction/media-sync/03-convert-webp.js",
+    "media:upload": "node strapi_extraction/media-sync/04-upload-replace.js"
   },
   "dependencies": {
     "@strapi/blocks-react-renderer": "^1.0.1",
@@ -31,6 +35,7 @@
     "@types/react": "^19",
     "@types/react-dom": "^19",
     "postcss": "^8",
+    "sharp": "^0.33.5",
     "tailwindcss": "^3.4.1",
     "typescript": "^5"
   }
diff --git a/strapi_extraction/media-sync/01-fetch-inventory.js b/strapi_extraction/media-sync/01-fetch-inventory.js
new file mode 100644
index 0000000..7831519
--- /dev/null
+++ b/strapi_extraction/media-sync/01-fetch-inventory.js
@@ -0,0 +1,139 @@
+/**
+ * 01 — Appelle l’API Strapi (lecture publique) et produit media-inventory.json
+ * (liste de tous les fichiers image liés aux content-types configurés).
+ *
+ * Usage : node strapi_extraction/media-sync/01-fetch-inventory.js
+ */
+const fs = require("fs");
+const path = require("path");
+const {
+  API_BASE,
+  WORK_ROOT,
+  FILE_INVENTORY,
+  COLLECTIONS,
+  PAGE_SIZE,
+} = require("./config");
+const { normalizeField, safeSlug } = require("./lib/collect-media");
+
+function unwrapEntry(entry) {
+  if (!entry) return null;
+  if (entry.attributes) {
+    return {
+      ...entry.attributes,
+      id: entry.id,
+      documentId: entry.documentId,
+    };
+  }
+  return entry;
+}
+
+async function fetchJson(url) {
+  const r = await fetch(url);
+  if (!r.ok) {
+    const txt = await r.text();
+    throw new Error(`HTTP ${r.status} ${url}\n${txt.slice(0, 500)}`);
+  }
+  return r.json();
+}
+
+async function fetchAllEntries(plural) {
+  const out = [];
+  let page = 1;
+  /* eslint-disable no-constant-condition */
+  while (true) {
+    const params = new URLSearchParams();
+    params.set("pagination[page]", String(page));
+    params.set("pagination[pageSize]", String(PAGE_SIZE));
+    /**
+     * Strapi v5 : populate[picture]=* peut provoquer « Invalid key related » selon versions.
+     * populate=* hydrate les relations premier niveau (y compris les médias).
+     */
+    params.set("populate", "*");
+
+    const url = `${API_BASE}/${plural}?${params}`;
+    const json = await fetchJson(url);
+    const rows = Array.isArray(json.data) ? json.data : [];
+    for (const row of rows) {
+      out.push(unwrapEntry(row));
+    }
+    const pageCount = json.meta?.pagination?.pageCount ?? 1;
+    if (page >= pageCount || rows.length === 0) break;
+    page += 1;
+    await new Promise((r) => setTimeout(r, 200));
+  }
+  return out;
+}
+
+async function main() {
+  console.log("🔍 STRAPI_URL (origine) →", require("./config").STRAPI_URL);
+  console.log("🔍 API_BASE →", API_BASE);
+
+  if (!fs.existsSync(WORK_ROOT)) {
+    fs.mkdirSync(WORK_ROOT, { recursive: true });
+  }
+
+  const inventory = {
+    generatedAt: new Date().toISOString(),
+    apiBase: API_BASE,
+    files: [],
+  };
+
+  /** @type {typeof inventory.files} */
+  const records = [];
+
+  for (const col of COLLECTIONS) {
+    console.log(`\n📂 ${col.plural} (${col.section})…`);
+    let entries;
+    try {
+      entries = await fetchAllEntries(col.plural);
+    } catch (e) {
+      console.error(`   ⚠️  Endpoint indisponible ou erreur : ${e.message}`);
+      continue;
+    }
+
+    console.log(`   ${entries.length} entrée(s)`);
+
+    for (const entry of entries) {
+      if (!entry) continue;
+      const slug = safeSlug(entry);
+
+      for (const field of col.fields) {
+        const items = normalizeField(entry[field.name], field.multiple);
+        for (const { file, index } of items) {
+          const base = path.basename(file.url.split("?")[0] || "file");
+          records.push({
+            collectionPlural: col.plural,
+            collectionSingular: col.singular,
+            strapiRef: col.ref,
+            section: col.section,
+            entrySlug: slug,
+            entryId: entry.id,
+            entryDocumentId: entry.documentId ?? null,
+            fieldName: field.name,
+            fieldMultiple: field.multiple,
+            fieldIndex: index,
+            fileId: file.id,
+            fileDocumentId: file.documentId ?? null,
+            filename: file.name || base,
+            url: file.url,
+            mime: file.mime,
+            size: file.size,
+            ext: file.ext,
+            /** chemin relatif WORK_ROOT/downloaded/... rempli par 02 */
+            relativeDownloadPath: null,
+          });
+        }
+      }
+    }
+  }
+
+  inventory.files = records.slice().sort((a, b) => a.fileId - b.fileId);
+
+  fs.writeFileSync(FILE_INVENTORY, JSON.stringify(inventory, null, 2), "utf8");
+  console.log(`\n✅ Inventaire : ${inventory.files.length} fichier(s) → ${FILE_INVENTORY}`);
+}
+
+main().catch((err) => {
+  console.error(err);
+  process.exit(1);
+});
diff --git a/strapi_extraction/media-sync/02-download.js b/strapi_extraction/media-sync/02-download.js
new file mode 100644
index 0000000..c66f74a
--- /dev/null
+++ b/strapi_extraction/media-sync/02-download.js
@@ -0,0 +1,108 @@
+/**
+ * 02 — Télécharge chaque fichier unique de l’inventaire vers
+ *   extract/media-sync-work/downloaded/{section}/{slug}/...
+ * et met à jour relativeDownloadPath dans media-inventory.json
+ *
+ * Usage : node strapi_extraction/media-sync/02-download.js
+ */
+const fs = require("fs");
+const path = require("path");
+const { STRAPI_URL, FILE_INVENTORY, WORK_ROOT, DIR_DOWNLOADED } = require("./config");
+
+function safeFilePart(name) {
+  return String(name || "file")
+    .replace(/[<>:"/\\|?*\x00-\x1f]/g, "_")
+    .slice(0, 180);
+}
+
+function absoluteUrl(relativeOrAbsolute) {
+  if (relativeOrAbsolute.startsWith("http://") || relativeOrAbsolute.startsWith("https://")) {
+    return relativeOrAbsolute;
+  }
+  return `${STRAPI_URL}${relativeOrAbsolute.startsWith("/") ? "" : "/"}${relativeOrAbsolute}`;
+}
+
+async function downloadBuffer(url) {
+  const r = await fetch(url);
+  if (!r.ok) {
+    throw new Error(`HTTP ${r.status} ${url}`);
+  }
+  const buf = Buffer.from(await r.arrayBuffer());
+  return buf;
+}
+
+async function main() {
+  if (!fs.existsSync(FILE_INVENTORY)) {
+    console.error("Manque l’inventaire. Lance d’abord : 01-fetch-inventory.js");
+    process.exit(1);
+  }
+
+  const raw = fs.readFileSync(FILE_INVENTORY, "utf8");
+  const inventory = JSON.parse(raw);
+  const files = inventory.files;
+  if (!Array.isArray(files) || files.length === 0) {
+    console.log("Inventaire vide — rien à télécharger.");
+    return;
+  }
+
+  if (!fs.existsSync(DIR_DOWNLOADED)) {
+    fs.mkdirSync(DIR_DOWNLOADED, { recursive: true });
+  }
+
+  const byId = new Map();
+  let ok = 0;
+  let skipped = 0;
+  let fail = 0;
+
+  for (const row of files) {
+    const id = row.fileId;
+    if (byId.has(id)) {
+      row.relativeDownloadPath = byId.get(id);
+      skipped++;
+      continue;
+    }
+
+    const rel = path.join(
+      row.section,
+      row.entrySlug,
+      `${id}_${safeFilePart(row.filename)}`
+    );
+    const abs = path.join(DIR_DOWNLOADED, rel);
+
+    try {
+      const url = absoluteUrl(row.url);
+      const buf = await downloadBuffer(url);
+      fs.mkdirSync(path.dirname(abs), { recursive: true });
+      fs.writeFileSync(abs, buf);
+      row.relativeDownloadPath = rel.replace(/\\/g, "/");
+      byId.set(id, row.relativeDownloadPath);
+      ok++;
+      console.log(`✅ ${rel} (${(buf.length / 1024).toFixed(1)} KB)`);
+    } catch (e) {
+      console.error(`❌ fileId=${id} : ${e.message}`);
+      row.relativeDownloadPath = null;
+      row.downloadError = String(e.message);
+      fail++;
+    }
+  }
+
+  inventory.downloadedAt = new Date().toISOString();
+  inventory.stats = {
+    uniqueFiles: byId.size,
+    rowsTotal: files.length,
+    downloadedOk: ok,
+    dedupSkipped: skipped,
+    failed: fail,
+  };
+
+  fs.writeFileSync(FILE_INVENTORY, JSON.stringify(inventory, null, 2), "utf8");
+  console.log(`\n📁 Base téléchargements : ${DIR_DOWNLOADED}`);
+  console.log(
+    `Résumé : ${ok} téléchargement(s), ${skipped} lignes réutilisent un fichier déjà pris, ${fail} échec(s).`
+  );
+}
+
+main().catch((e) => {
+  console.error(e);
+  process.exit(1);
+});
diff --git a/strapi_extraction/media-sync/03-convert-webp.js b/strapi_extraction/media-sync/03-convert-webp.js
new file mode 100644
index 0000000..194d9ee
--- /dev/null
+++ b/strapi_extraction/media-sync/03-convert-webp.js
@@ -0,0 +1,133 @@
+/**
+ * 03 — Convertit les téléchargements en WebP (sharp) sous
+ *   extract/media-sync-work/webp/{section}/{slug}/{fileId}_{stem}.webp
+ * Les SVG sont copiés en .svg (sans conversion raster).
+ *
+ * Usage : node strapi_extraction/media-sync/03-convert-webp.js
+ */
+const fs = require("fs");
+const path = require("path");
+const sharp = require("sharp");
+const { FILE_INVENTORY, DIR_DOWNLOADED, DIR_WEBP, WORK_ROOT } = require("./config");
+
+const MAX_EDGE = 2560;
+const WEBP_QUALITY = 82;
+
+function stemFromFilename(filename) {
+  const b = path.basename(filename);
+  const i = b.lastIndexOf(".");
+  return i <= 0 ? b : b.slice(0, i);
+}
+
+async function toWebpRaster(srcPath, destPath) {
+  const meta = await sharp(srcPath).metadata();
+  const w = meta.width || 0;
+  const h = meta.height || 0;
+  let pipeline = sharp(srcPath).rotate();
+  if (w > MAX_EDGE || h > MAX_EDGE) {
+    pipeline = pipeline.resize(MAX_EDGE, MAX_EDGE, {
+      fit: "inside",
+      withoutEnlargement: true,
+    });
+  }
+  fs.mkdirSync(path.dirname(destPath), { recursive: true });
+  await pipeline.webp({ quality: WEBP_QUALITY, effort: 4 }).toFile(destPath);
+}
+
+async function main() {
+  if (!fs.existsSync(FILE_INVENTORY)) {
+    console.error("Manque media-inventory.json — lance 01 puis 02.");
+    process.exit(1);
+  }
+
+  const inventory = JSON.parse(fs.readFileSync(FILE_INVENTORY, "utf8"));
+  const files = inventory.files;
+  if (!Array.isArray(files) || !files.length) {
+    console.log("Rien à convertir.");
+    return;
+  }
+
+  if (!fs.existsSync(WORK_ROOT)) fs.mkdirSync(WORK_ROOT, { recursive: true });
+  if (!fs.existsSync(DIR_WEBP)) fs.mkdirSync(DIR_WEBP, { recursive: true });
+
+  const byId = new Map();
+  let ok = 0;
+  let err = 0;
+
+  for (const row of files) {
+    const id = row.fileId;
+    if (!row.relativeDownloadPath) {
+      row.relativeWebpPath = null;
+      continue;
+    }
+    if (byId.has(id)) {
+      row.relativeWebpPath = byId.get(id);
+      continue;
+    }
+
+    const src = path.join(DIR_DOWNLOADED, row.relativeDownloadPath);
+    if (!fs.existsSync(src)) {
+      row.relativeWebpPath = null;
+      row.convertError = "fichier téléchargé manquant";
+      err++;
+      continue;
+    }
+
+    const ext = path.extname(src).toLowerCase();
+    const baseStem = `${id}_${stemFromFilename(row.filename)}`;
+    const relDir = path.join(row.section, row.entrySlug);
+    let relOutFile;
+    let absOut;
+
+    try {
+      if (ext === ".svg") {
+        relOutFile = path.join(relDir, `${baseStem}.svg`).replace(/\\/g, "/");
+        absOut = path.join(DIR_WEBP, relOutFile);
+        fs.mkdirSync(path.dirname(absOut), { recursive: true });
+        fs.copyFileSync(src, absOut);
+        console.log(`svg-copy       → ${relOutFile}`);
+      } else if (ext === ".webp") {
+        relOutFile = path.join(relDir, `${baseStem}.webp`).replace(/\\/g, "/");
+        absOut = path.join(DIR_WEBP, relOutFile);
+        fs.mkdirSync(path.dirname(absOut), { recursive: true });
+        fs.copyFileSync(src, absOut);
+        console.log(`webp-copy      → ${relOutFile}`);
+      } else if ([".png", ".jpg", ".jpeg", ".tif", ".tiff"].includes(ext)) {
+        relOutFile = path.join(relDir, `${baseStem}.webp`).replace(/\\/g, "/");
+        absOut = path.join(DIR_WEBP, relOutFile);
+        await toWebpRaster(src, absOut);
+        console.log(`webp-transform → ${relOutFile}`);
+      } else {
+        relOutFile = path.join(relDir, path.basename(src)).replace(/\\/g, "/");
+        absOut = path.join(DIR_WEBP, relOutFile);
+        fs.mkdirSync(path.dirname(absOut), { recursive: true });
+        fs.copyFileSync(src, absOut);
+        console.log(`raw-copy       → ${relOutFile}`);
+      }
+
+      row.relativeWebpPath = relOutFile;
+      byId.set(id, relOutFile);
+      ok++;
+    } catch (e) {
+      row.relativeWebpPath = null;
+      row.convertError = String(e.message);
+      err++;
+      console.error(`❌ fileId ${id}: ${e.message}`);
+    }
+  }
+
+  inventory.convertedAt = new Date().toISOString();
+  inventory.convertSettings = {
+    maxEdgePx: MAX_EDGE,
+    webpQuality: WEBP_QUALITY,
+  };
+
+  fs.writeFileSync(FILE_INVENTORY, JSON.stringify(inventory, null, 2), "utf8");
+  console.log(`\n✅ Fichiers uniques traités : ${ok}, erreurs : ${err}`);
+  console.log(`📁 ${DIR_WEBP}`);
+}
+
+main().catch((e) => {
+  console.error(e);
+  process.exit(1);
+});
diff --git a/strapi_extraction/media-sync/04-upload-replace.js b/strapi_extraction/media-sync/04-upload-replace.js
new file mode 100644
index 0000000..cdbcd25
--- /dev/null
+++ b/strapi_extraction/media-sync/04-upload-replace.js
@@ -0,0 +1,270 @@
+/**
+ * 04 — Ré-upload les WebP générés vers Strapi et remplace les entrées média dans
+ * les fiches concernées (API authentifiée).
+ *
+ * Requiert dans l’env : STRAPI_API_TOKEN (JWT Strapi avec droits upload + mise à jour
+ * des collection types utilisés ; typiquement un jeton Full access en local).
+ *
+ * Par défaut : **dry-run** (aucune mutation).
+ * Mutation réelle : node strapi_extraction/media-sync/04-upload-replace.js --execute
+ *
+ * DANGER : sauvegarder au préalable votre base Strapi / médias. Tester sur une
+ * copie locale (Strapi localhost + même base si possible).
+ */
+const fs = require("fs");
+const path = require("path");
+require("dotenv").config({
+  path: path.join(__dirname, "../../cmsbackend/.env"),
+});
+require("dotenv").config({
+  path: path.join(__dirname, "../../.env.local"),
+});
+
+const {
+  FILE_INVENTORY,
+  DIR_WEBP,
+  API_BASE,
+} = require("./config");
+
+const TOKEN = process.env.STRAPI_API_TOKEN;
+const EXECUTE = process.argv.includes("--execute");
+
+function mimeForFile(filePath) {
+  const ext = path.extname(filePath).toLowerCase();
+  const map = {
+    ".webp": "image/webp",
+    ".svg": "image/svg+xml",
+    ".png": "image/png",
+    ".jpg": "image/jpeg",
+    ".jpeg": "image/jpeg",
+  };
+  return map[ext] || "application/octet-stream";
+}
+
+/** Compte combien de lignes d’inventaire pointent le même fileId */
+function countRefs(files) {
+  const c = {};
+  for (const r of files) {
+    c[r.fileId] = (c[r.fileId] || 0) + 1;
+  }
+  return c;
+}
+
+/**
+ * Nom réservé multipart (ByteString) : les noms avec caractères hors U+00–U+FF
+ * (ex. U+2194 flèches dans des noms générés) provoquent l’erreur Node
+ * « Cannot convert argument to a ByteString » sur form.append(..., filename).
+ */
+function asciiUploadName(filePath, fileId) {
+  const ext = path.extname(filePath).toLowerCase();
+  const extOk = /^\.(webp|svg|png|jpe?g|gif|avif)$/.test(ext) ? ext : ".webp";
+  return `upload-${fileId}${extOk}`;
+}
+
+async function postUpload(filePath, fileId) {
+  const buf = fs.readFileSync(filePath);
+  const asciiName = asciiUploadName(filePath, fileId);
+  const blob = new Blob([buf], { type: mimeForFile(filePath) });
+  const body = new FormData();
+  body.append("files", blob, asciiName);
+
+  const res = await fetch(`${API_BASE}/upload`, {
+    method: "POST",
+    headers: TOKEN ? { Authorization: `Bearer ${TOKEN}` } : {},
+    body,
+  });
+  if (!res.ok) {
+    const t = await res.text();
+    throw new Error(`POST /upload ${res.status} ${t.slice(0, 800)}`);
+  }
+  const json = await res.json();
+  const arr = Array.isArray(json) ? json : json?.data;
+  if (!Array.isArray(arr) || !arr[0]) {
+    throw new Error(`Réponse upload inattendue : ${JSON.stringify(json).slice(0, 400)}`);
+  }
+  return arr[0];
+}
+
+function unwrapEntry(raw) {
+  if (!raw) return null;
+  if (raw.data) return unwrapEntry(raw.data);
+  if (raw.attributes) {
+    return {
+      ...raw.attributes,
+      id: raw.id,
+      documentId: raw.documentId,
+    };
+  }
+  return raw;
+}
+
+async function getEntryPlural(plural, documentId) {
+  const qs = new URLSearchParams({ populate: "*" });
+  const url = `${API_BASE}/${plural}/${documentId}?${qs}`;
+  const res = await fetch(url, {
+    headers: TOKEN ? { Authorization: `Bearer ${TOKEN}` } : {},
+  });
+  if (!res.ok) {
+    const t = await res.text();
+    throw new Error(`GET ${url} → ${res.status} ${t.slice(0, 400)}`);
+  }
+  const json = await res.json();
+  return unwrapEntry(json);
+}
+
+function getMediaIdsFromField(entry, fieldName, multiple) {
+  const v = entry[fieldName];
+  if (multiple) {
+    const arr = Array.isArray(v) ? v : [];
+    return arr.map((x) => (typeof x === "object" && x !== null ? x.id : x)).filter(Boolean);
+  }
+  if (!v) return [];
+  if (typeof v === "object" && v.id) return [v.id];
+  if (typeof v === "number") return [v];
+  return [];
+}
+
+async function putEntry(plural, documentId, payloadData) {
+  const url = `${API_BASE}/${plural}/${documentId}`;
+  const res = await fetch(url, {
+    method: "PUT",
+    headers: {
+      "Content-Type": "application/json",
+      ...(TOKEN ? { Authorization: `Bearer ${TOKEN}` } : {}),
+    },
+    body: JSON.stringify({ data: payloadData }),
+  });
+  if (!res.ok) {
+    const t = await res.text();
+    throw new Error(`PUT ${url} → ${res.status} ${t.slice(0, 800)}`);
+  }
+  return res.json();
+}
+
+async function deleteFile(fileId) {
+  const url = `${API_BASE}/upload/files/${fileId}`;
+  const res = await fetch(url, {
+    method: "DELETE",
+    headers: TOKEN ? { Authorization: `Bearer ${TOKEN}` } : {},
+  });
+  if (!res.ok) {
+    const t = await res.text();
+    throw new Error(`DELETE ${url} → ${res.status} ${t.slice(0, 400)}`);
+  }
+}
+
+async function main() {
+  if (!fs.existsSync(FILE_INVENTORY)) {
+    console.error("Manque media-inventory.json");
+    process.exit(1);
+  }
+
+  if (!TOKEN) {
+    console.error(
+      "STRAPI_API_TOKEN manquant. Crée un jeton API dans Strapi (Settings → API Tokens), puis exporte :\n" +
+        "  Windows PowerShell : $env:STRAPI_API_TOKEN=\"…\"\n" +
+        "  ou ajoute STRAPI_API_TOKEN dans cmsbackend/.env (non commité)."
+    );
+    process.exit(1);
+  }
+
+  const inventory = JSON.parse(fs.readFileSync(FILE_INVENTORY, "utf8"));
+  const files = inventory.files || [];
+  const refCount = countRefs(files);
+
+  const candidates = files.filter(
+    (r) =>
+      r.relativeWebpPath &&
+      r.relativeWebpPath.endsWith(".webp") &&
+      r.entryDocumentId
+  );
+
+  console.log(
+    `Lignes inventaire : ${files.length} — candidats WebP remplaçables (avec documentId) : ${candidates.length}`
+  );
+  console.log(`Mode : ${EXECUTE ? "EXECUTE (mutations réelles)" : "DRY-RUN (aucune mutation)"}\n`);
+
+  if (!EXECUTE) {
+    console.log(
+      "Exemple d’actions qui seraient effectuées avec --execute :\n" +
+        "  1. POST /api/upload pour chaque fichier .webp sous webp/\n" +
+        "  2. PUT /api/:collection/:documentId avec le champ média mis à jour (ids)\n" +
+        "  3. DELETE /api/upload/files/:oldFileId uniquement si l’ancien id n’a qu’une référence dans l’inventaire\n"
+    );
+    for (let i = 0; i < Math.min(5, candidates.length); i++) {
+      const r = candidates[i];
+      console.log(
+        ` • fileId=${r.fileId} → ${r.relativeWebpPath} → entrée ${r.collectionPlural} documentId=${r.entryDocumentId} champ=${r.fieldName}[${r.fieldIndex}]`
+      );
+    }
+    console.log("\nAjoute --execute pour réellement téléverser (après avoir testé la sauvegarde).");
+    return;
+  }
+
+  /** Par sécurité, traite fichier par fichier ; re-fetch après chaque succès évite désalignement indices */
+  for (const row of candidates) {
+    const src = path.join(DIR_WEBP, row.relativeWebpPath.replace(/\//g, path.sep));
+    if (!fs.existsSync(src)) {
+      console.warn(`SKIP fileId=${row.fileId} : fichier absent ${src}`);
+      continue;
+    }
+
+    const docId = row.entryDocumentId;
+    const plural = row.collectionPlural;
+    const field = row.fieldName;
+    const idx = row.fieldIndex;
+    const oldId = row.fileId;
+
+    try {
+      const uploaded = await postUpload(src, row.fileId);
+      const newId = uploaded.id;
+
+      const entry = await getEntryPlural(plural, docId);
+      if (!entry) throw new Error("entrée introuvable");
+
+      const multiple = row.fieldMultiple;
+      const currentIds = getMediaIdsFromField(entry, field, multiple);
+
+      if (multiple) {
+        if (idx < 0 || idx >= currentIds.length) {
+          throw new Error(`index ${idx} hors limites (ids actuels : ${currentIds.join(",")})`);
+        }
+        if (currentIds[idx] !== oldId) {
+          throw new Error(
+            `id à l’index ${idx} est ${currentIds[idx]}, attendu ${oldId} — arrêt pour éviter corruption`
+          );
+        }
+        const next = currentIds.slice();
+        next[idx] = newId;
+        await putEntry(plural, docId, { [field]: next });
+      } else {
+        const cur = currentIds[0];
+        if (cur != null && cur !== oldId) {
+          throw new Error(`champ simple : attendu ancien id ${oldId}, vu ${cur}`);
+        }
+        await putEntry(plural, docId, { [field]: newId });
+      }
+
+      console.log(`OK upload+remplace : ${oldId} → ${newId} (${plural}/${docId})`);
+
+      const canDeleteOld = refCount[oldId] === 1;
+      if (canDeleteOld && oldId !== newId) {
+        try {
+          await deleteFile(oldId);
+          console.log(`   ancien fichier Strapi ${oldId} supprimé`);
+        } catch (de) {
+          console.warn(`   suppression ancien échouée (non bloquant) : ${de.message}`);
+        }
+      }
+    } catch (e) {
+      console.error(`ÉCHEC fileId=${row.fileId} : ${e.message}`);
+    }
+  }
+
+  console.log("\nTerminé. Recharge les fiches dans l’admin et vide le cache navigateur.");
+}
+
+main().catch((e) => {
+  console.error(e);
+  process.exit(1);
+});
diff --git a/strapi_extraction/media-sync/README.md b/strapi_extraction/media-sync/README.md
new file mode 100644
index 0000000..1a00eef
--- /dev/null
+++ b/strapi_extraction/media-sync/README.md
@@ -0,0 +1,58 @@
+# Pipeline médias Strapi → dossiers par section → WebP → ré-upload optionnel
+
+**Répertoire de travail (lourd)** : `strapi_extraction/extract/media-sync-work/` — ignoré par Git (`/.gitignore`).
+
+## Prérequis
+
+- Node 18+
+- Dépendance `sharp` installée depuis la racine (`npm install` déjà fait si le dépôt à jour).
+
+## Variables optionnelles
+
+| Variable | Rôle |
+|----------|------|
+| `STRAPI_URL` | Origine Strapi sans `/api` (défaut depuis `NEXT_PUBLIC_API_URL` ou prod). |
+| `STRAPI_API_TOKEN` | **Seulement** pour `04-upload-replace.js --execute`. Jeton créé dans Strapi → Settings → API Tokens (droits lecture + Upload + mise à jour des CT concernés). Ne pas committer ce jeton. |
+
+Chemins `.env.local` à la racine et `cmsbackend/.env` sont chargés par les scripts (`config.js` ou `04`).
+
+## Chaîne normale
+
+```powershell
+# depuis la racine du repo J:\my-next-site
+
+npm run media:inventory        # 01 — liste tous les médias utilisés → media-inventory.json
+
+npm run media:download           # 02 — téléchargement physique par section sous downloaded/
+
+npm run media:webp               # 03 — conversion/copies sous webp/
+
+npm run media:upload             # 04 — dry-run uniquement (aucune mutation)
+
+# Mutation CMS (**attention**) après lecture ci‑dessous :
+
+$env:STRAPI_API_TOKEN="<jeton>"
+node strapi_extraction/media-sync/04-upload-replace.js --execute
+```
+
+### Organisation des dossiers
+
+- **`downloaded/{section}/{slug-du-contenu}/{fileId}_{nom-fichier}`**  
+  Sections : `portfolio`, `competences`, `home`, `realisation-ias`, `glossaire`.
+- **`webp/...`** même structure, avec `.webp` (ou `.svg` copié en clair).
+
+Les **fichiers média uniques** sont dédupliqués par `fileId` : une seule fois sur disque, plusieurs lignes dans l’inventaire peuvent référencer le même téléchargement.
+
+### Erreur « Cannot convert argument to a ByteString » (upload)
+
+Les noms de fichiers sur disque peuvent contenir des caractères Unicode (tirets fins, flèches dans des noms AI, etc.). Le `FormData` HTTP n’accepte qu’un nom de fichier **ASCII** dans l’en-tête multipart ; le script **`04-upload-replace.js`** renomme donc en interne chaque envoi en `upload-{fileId}.webp` (voir `asciiUploadName` dans le fichier). Relance `--execute` après mise à jour du script.
+
+### Avant le `--execute` sur la prod
+
+1. **Tester d’abord** contre une instance Strapi locale (ex. importer la base vers `cmsbackend`, `npm run develop`, puis `$env:STRAPI_URL="http://localhost:1337"` et un jeton local).
+2. **Sauvegarder** la base et `/public/uploads`.
+3. Lire le préambule dans `04-upload-replace.js` ; le script vérifie que l’ancien id correspond encore avant remplacement pour limiter les corruptions.
+
+## Si l’étape ré-upload vous suffit après conversion manuelle
+
+Vous pouvez aussi **importer uniquement les WebP** depuis l’admin Strapi puis réassigner les champs à la main ; ce dépôt ne vous oblige pas à utiliser `04`.
diff --git a/strapi_extraction/media-sync/config.js b/strapi_extraction/media-sync/config.js
new file mode 100644
index 0000000..c4e5968
--- /dev/null
+++ b/strapi_extraction/media-sync/config.js
@@ -0,0 +1,78 @@
+/**
+ * Configuration partagée — sync médias Strapi (téléchargement / WebP / ré-upload).
+ * Variables d'environnement (optionnelles) :
+ *   STRAPI_URL          — origine sans /api (ex. https://api.fernandgrascalvet.com ou http://localhost:1337)
+ *   STRAPI_API_TOKEN    — jeton API Strapi (requis pour 04-upload-replace.js --execute)
+ */
+require("dotenv").config({ path: require("path").join(__dirname, "../../.env.local") });
+require("dotenv").config({ path: require("path").join(__dirname, "../../cmsbackend/.env") });
+
+const path = require("path");
+
+const STRAPI_URL =
+  process.env.STRAPI_URL ||
+  process.env.NEXT_PUBLIC_API_URL?.replace(/\/$/, "") ||
+  "https://api.fernandgrascalvet.com";
+
+const API_BASE = `${STRAPI_URL}/api`;
+
+/** Sortie : mirrors extract/ existant (gitignored lourd) */
+const WORK_ROOT = path.join(__dirname, "../extract/media-sync-work");
+const DIR_DOWNLOADED = path.join(WORK_ROOT, "downloaded");
+const DIR_WEBP = path.join(WORK_ROOT, "webp");
+const FILE_INVENTORY = path.join(WORK_ROOT, "media-inventory.json");
+
+/**
+ * Content-types avec champs média — aligné sur cmsbackend/src/api (schema.json par type).
+ * section = sous-dossier humain (portfolio, competences, …)
+ */
+const COLLECTIONS = [
+  {
+    plural: "projects",
+    singular: "project",
+    ref: "api::project.project",
+    section: "portfolio",
+    fields: [{ name: "picture", multiple: true }],
+  },
+  {
+    plural: "competences",
+    singular: "competence",
+    ref: "api::competence.competence",
+    section: "competences",
+    fields: [{ name: "picture", multiple: true }],
+  },
+  {
+    plural: "homepages",
+    singular: "homepage",
+    ref: "api::homepage.homepage",
+    section: "home",
+    fields: [{ name: "photo", multiple: false }],
+  },
+  {
+    plural: "realisation-ias",
+    singular: "realisation-ia",
+    ref: "api::realisation-ia.realisation-ia",
+    section: "realisation-ias",
+    fields: [{ name: "picture", multiple: true }],
+  },
+  {
+    plural: "glossaires",
+    singular: "glossaire",
+    ref: "api::glossaire.glossaire",
+    section: "glossaire",
+    fields: [{ name: "images", multiple: true }],
+  },
+];
+
+const PAGE_SIZE = 100;
+
+module.exports = {
+  STRAPI_URL,
+  API_BASE,
+  WORK_ROOT,
+  DIR_DOWNLOADED,
+  DIR_WEBP,
+  FILE_INVENTORY,
+  COLLECTIONS,
+  PAGE_SIZE,
+};
diff --git a/strapi_extraction/media-sync/lib/collect-media.js b/strapi_extraction/media-sync/lib/collect-media.js
new file mode 100644
index 0000000..c7ba6f0
--- /dev/null
+++ b/strapi_extraction/media-sync/lib/collect-media.js
@@ -0,0 +1,41 @@
+/**
+ * Helpers — extraire les fichiers média des réponses Strapi v5 (structure plate).
+ */
+
+function isUploadedImage(obj) {
+  if (!obj || typeof obj !== "object" || typeof obj.url !== "string") return false;
+  if (!obj.url.includes("/uploads/")) return false;
+  if (obj.mime && !obj.mime.startsWith("image/")) return false;
+  return true;
+}
+
+/** Liste { file, index } pour un champ média Strapi */
+function normalizeField(fieldVal, multiple) {
+  if (!fieldVal) return [];
+  if (multiple) {
+    const arr = Array.isArray(fieldVal) ? fieldVal : [fieldVal];
+    return arr
+      .filter(isUploadedImage)
+      .map((file, index) => ({ file, index }));
+  }
+  return isUploadedImage(fieldVal)
+    ? [{ file: fieldVal, index: 0 }]
+    : [];
+}
+
+function safeSlug(entry) {
+  const s =
+    entry.slug ??
+    entry.documentId ??
+    (entry.id != null ? String(entry.id) : "unknown");
+  return String(s)
+    .replace(/[^\wÀ-ÖØ-öø-ÿ.-]+/gu, "_")
+    .slice(0, 96)
+    .replace(/^_|_$/g, "") || "entry";
+}
+
+module.exports = {
+  normalizeField,
+  safeSlug,
+  isUploadedImage,
+};