[Fix] Usa git clone per checkout su Windows

- Sostituito download ZIP con git clone diretto
- Più veloce e affidabile
- Clone shallow (depth 1) per performance
- Verifica Dockerfile.windows dopo clone
- Git è disponibile sul runner Windows

.gitea/workflows/docker-build.yml

@@ -99,47 +99,25 @@ jobs:
       packages: write
       
     steps:
-      - name: Download and extract repository
+      - name: Checkout repository with Git
         run: |
-          echo ===== Downloading repository =====
-          curl -L -o repo.zip https://github.com/${{ github.repository }}/archive/refs/heads/${{ github.ref_name }}.zip
+          echo ===== Cloning repository =====
+          git clone --depth 1 --branch ${{ github.ref_name }} https://github.com/${{ github.repository }}.git repo
           if errorlevel 1 (
-            echo Failed to download repository
+            echo Failed to clone repository
             exit /b 1
           )
           
-          echo ===== Extracting archive =====
-          tar -xf repo.zip
-          if errorlevel 1 (
-            echo Failed to extract archive
-            exit /b 1
-          )
-          
-          echo ===== Finding extracted folder =====
-          dir /B /AD
-          
-          echo ===== Moving files to current directory =====
-          REM GitHub creates folder with format: repo-name-branch
-          REM Find first directory and copy its contents
-          for /d %%i in (*) do (
-            echo Found directory: %%i
-            echo Copying contents from %%i to current directory...
-            robocopy "%%i" . /E /MOVE /NFL /NDL /NJH /NJS
-            goto :extracted
-          )
-          :extracted
-          
-          echo ===== Cleaning up =====
-          del repo.zip
-          
-          echo ===== Verifying files =====
-          echo Current directory contents:
-          dir /B
+          echo ===== Moving files to working directory =====
+          robocopy repo . /E /MOVE /NFL /NDL /NJH /NJS
+          rmdir repo /S /Q 2>nul
           
+          echo ===== Verifying checkout =====
           if exist Dockerfile.windows (
-            echo SUCCESS: Dockerfile.windows found!
+            echo SUCCESS: Repository checked out, Dockerfile.windows found
           ) else (
-            echo ERROR: Dockerfile.windows not found!
+            echo ERROR: Dockerfile.windows not found
+            dir /B
             exit /b 1
           )
         shell: cmd