ci(ux): remove marketplace actions from isolated platform contract

.github/workflows/ux-platform-contract.yml

@@ -24,25 +24,20 @@ jobs:
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
     steps:
-      - name: Repository auschecken
-        uses: actions/checkout@v6
-        with:
-          fetch-depth: 0
+      - name: Exakten Commit ohne Marketplace-Action auschecken
+        run: |
+          git init .
+          git remote add origin "${{ github.server_url }}/${{ github.repository }}.git"
+          git fetch --depth=1 origin "${{ github.sha }}"
+          git checkout --detach FETCH_HEAD
 
       - name: Runner-Node und Plattform dokumentieren
         run: |
-          node -e "const fs=require('fs'); fs.mkdirSync('artifacts',{recursive:true}); const report=['Platform: '+process.platform,'Node: '+process.version,'Architecture: '+process.arch,''].join('\\n'); fs.writeFileSync('artifacts/ux-platform-preflight.log',report); process.stdout.write(report);"
+          node -e "const report=['Platform: '+process.platform,'Node: '+process.version,'Architecture: '+process.arch,'Commit: '+process.env.GITHUB_SHA,''].join('\\n'); process.stdout.write(report);"
 
       - name: Navigation API und Safe Actions prüfen
         run: node tools/run-ux-platform-gates.mjs
 
-      - name: UX-Plattformdiagnose sichern
+      - name: Diagnose immer ausgeben
         if: always()
-        uses: actions/upload-artifact@v4
-        with:
-          name: ux-platform-${{ matrix.os }}-${{ github.event.pull_request.head.sha || github.sha }}
-          path: |
-            artifacts/ux-platform-preflight.log
-            artifacts/ux-platform-gates.log
-          if-no-files-found: warn
-          retention-days: 14
+        run: node -e "const fs=require('fs'); for (const file of ['artifacts/ux-platform-preflight.log','artifacts/ux-platform-gates.log']) { if (fs.existsSync(file)) { console.log('--- '+file+' ---'); process.stdout.write(fs.readFileSync(file,'utf8')); } }"