refactor: simplify upload rules and remove destination flow

components/UploadZone.tsx

@@ -5,7 +5,6 @@ import { useSecret } from '@/hooks/useSecret'
 import { useFolderEntries } from '@/hooks/useFolderEntries'
 import { useUploadOrchestrator } from '@/hooks/useUploadOrchestrator'
 import SecretInput from './upload/SecretInput'
-import DestinationPicker from './upload/DestinationPicker'
 import FolderDropzone from './upload/FolderDropzone'
 import FolderCard from './upload/FolderCard'
 import ActionButtons from './upload/ActionButtons'
@@ -38,8 +37,6 @@ export default function UploadZone() {
     isUploading,
     globalError,
     setGlobalError,
-    destination,
-    setDestination,
     overwriteConfirm,
     setOverwriteConfirm,
     noChangesFolder,
@@ -84,18 +81,28 @@ export default function UploadZone() {
         onToggleVisible={toggleSecretVisible}
       />
 
-      <DestinationPicker
-        destination={destination}
-        disabled={isUploading}
-        onChange={setDestination}
-      />
-
       {entries.length === 0 && (
-        <FolderDropzone
-          isUploading={isUploading}
-          onFolderSelected={handleFolderSelected}
-          onError={setGlobalError}
-        />
+        <div className="space-y-2">
+          <p className="text-xs text-gray-400 leading-relaxed text-center">
+            Deposez un dossier complet contenant votre modele 3D nomme
+            {' '}<span className="font-mono text-gray-200">model.glb</span>
+            {' '}ainsi que toutes les textures necessaires.
+            {' '}Les textures peuvent etre en
+            {' '}<span className="font-mono text-gray-200">.png</span>,
+            {' '}<span className="font-mono text-gray-200">.jpg</span>
+            {' '}ou <span className="font-mono text-gray-200">.webp</span>.
+            {' '}Utilisez un nom simple si la texture s&apos;applique au modele entier, et un nom detaille si elle correspond a une partie precise du modele,
+            {' '}par exemple <span className="font-mono text-gray-200">color_fenetre.jpg</span>,
+            {' '}<span className="font-mono text-gray-200">roughness_tuyaux.png</span>,
+            {' '}<span className="font-mono text-gray-200">normal_dashboard.webp</span>
+            {' '}ou <span className="font-mono text-gray-200">opacity_verre.png</span>.
+          </p>
+          <FolderDropzone
+            isUploading={isUploading}
+            onFolderSelected={handleFolderSelected}
+            onError={setGlobalError}
+          />
+        </div>
       )}
 
       {globalError && (
@@ -119,7 +126,6 @@ export default function UploadZone() {
       <ActionButtons
         isUploading={isUploading}
         isSecretEmpty={isSecretEmpty}
-        noDestination={!destination}
         hasPendingOrErrors={hasPendingOrErrors}
         allDone={allDone}
         hasErrors={hasErrors}
@@ -130,7 +136,6 @@ export default function UploadZone() {
 
       {overwriteConfirm && (
         <OverwriteConfirmModal
-          destination={destination!}
           folderName={overwriteConfirm.folderName}
           diffs={overwriteConfirm.diffs}
           onCancel={() => setOverwriteConfirm(null)}
@@ -140,7 +145,6 @@ export default function UploadZone() {
 
       {noChangesFolder && (
         <NoChangesModal
-          destination={destination!}
           folderName={noChangesFolder}
           onCancel={() => {
             setNoChangesFolder(null)