diff --git a/.gitea/workflows/windows.yml b/.gitea/workflows/windows.yml
new file mode 100644
index 0000000..18e48f5
--- /dev/null
+++ b/.gitea/workflows/windows.yml
@@ -0,0 +1,735 @@
+name: Build Fritzing on Windows
+
+on:
+  push:
+    branches: [ master ]
+  workflow_dispatch:
+
+# Necesario para que GITHUB_TOKEN (token de Actions de Gitea) pueda crear la Release.
+permissions:
+  contents: write
+
+env:
+  QT_VERSION: '6.8.3'
+  QT_ARCH: 'win64_msvc2022_64'
+  LIBGIT2_VERSION: '1.7.1'
+
+jobs:
+  build:
+    # Gitea no tiene runners en la nube: esto se ejecuta en un runner
+    # self-hosted registrado con la etiqueta "windows".
+    runs-on: windows
+
+    steps:
+      # ── 0. Checkout repositories ──────────────────────────────────────────
+      - name: Checkout fritzing-build
+        uses: actions/checkout@v4
+        with:
+          path: fritzing-build
+
+      # fritzing-app y fritzing-parts viven en GitHub, no en este Gitea, así
+      # que se clonan directamente en vez de usar actions/checkout (que
+      # asumiría el mismo host que este repo).
+      - name: Checkout fritzing-app
+        run: git clone --depth 1 https://github.com/fritzing/fritzing-app.git fritzing-app
+        shell: pwsh
+
+      - name: Checkout fritzing-parts
+        run: git clone --depth 1 https://github.com/fritzing/fritzing-parts.git fritzing-parts
+        shell: pwsh
+
+      # ── 1. Setup MSVC 2022 environment ────────────────────────────────────
+      - name: Setup MSVC environment
+        uses: ilammy/msvc-dev-cmd@v1
+        with:
+          arch: amd64
+
+      # ── 2. Install Qt ─────────────────────────────────────────────────────
+      - name: Install Qt
+        uses: jurplel/install-qt-action@v4
+        with:
+          version: ${{ env.QT_VERSION }}
+          host: windows
+          target: desktop
+          arch: ${{ env.QT_ARCH }}
+          modules: 'qtserialport qt5compat'
+          cache: true
+
+      # ── 3. Cache built dependencies ───────────────────────────────────────
+      - name: Cache dependencies
+        id: deps-cache
+        uses: actions/cache@v4
+        with:
+          path: |
+            zlib
+            libgit2
+            quazip-1.4
+            quazip-${{ env.QT_VERSION }}-1.4intuisphere
+            Clipper1-6.4.2
+            boost_1_85_0
+            svgpp-1.3.1
+            ngspice-42
+          key: deps-manual-v3-shared-git2-${{ runner.os }}-qt-${{ env.QT_VERSION }}
+
+      # ── 4. Build ZLib ─────────────────────────────────────────────────────
+      - name: Download ZLib
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          Invoke-WebRequest `
+            -Uri "https://github.com/madler/zlib/releases/download/v1.3/zlib-1.3.tar.gz" `
+            -OutFile zlib.tar.gz
+
+          tar -xzf zlib.tar.gz
+          Rename-Item zlib-1.3 zlib
+          Remove-Item zlib.tar.gz
+        shell: pwsh
+
+      - name: Build ZLib
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        working-directory: zlib
+        run: |
+          mkdir build
+          cd build
+          cmake -G "NMake Makefiles" -DCMAKE_BUILD_TYPE=Release ..
+          nmake
+          copy zconf.h ..
+        shell: cmd
+
+      # ── 5. Build libgit2 as DLL ───────────────────────────────────────────
+      - name: Clone libgit2
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          git clone `
+            --branch "v${{ env.LIBGIT2_VERSION }}" `
+            --depth 1 `
+            https://github.com/libgit2/libgit2.git `
+            libgit2
+        shell: pwsh
+
+      - name: Build libgit2 shared
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        working-directory: libgit2
+        run: |
+          set ZLIB_ROOT=%GITHUB_WORKSPACE%\zlib
+
+          mkdir build64
+          cd build64
+
+          cmake -G "NMake Makefiles" ^
+            -DCMAKE_BUILD_TYPE=Release ^
+            -DBUILD_SHARED_LIBS=ON ^
+            -DBUILD_TESTS=OFF ^
+            -DBUILD_CLI=OFF ^
+            -DUSE_BUNDLED_ZLIB=OFF ^
+            -DZLIB_LIBRARY="%ZLIB_ROOT%\build\zlibstatic.lib" ^
+            -DZLIB_INCLUDE_DIR="%ZLIB_ROOT%" ^
+            ..
+
+          nmake
+        shell: cmd
+
+      - name: Verify libgit2 build
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          $GitLib = Get-ChildItem "libgit2\build64" `
+            -Recurse `
+            -Filter "git2.lib" |
+            Select-Object -First 1
+
+          $GitDll = Get-ChildItem "libgit2\build64" `
+            -Recurse `
+            -Filter "git2.dll" |
+            Select-Object -First 1
+
+          if (-not $GitLib) {
+            throw "git2.lib was not produced"
+          }
+
+          if (-not $GitDll) {
+            throw "git2.dll was not produced"
+          }
+
+          Write-Host "Import library: $($GitLib.FullName)"
+          Write-Host "DLL:            $($GitDll.FullName)"
+        shell: pwsh
+
+      # ── 6. Build QuaZip ───────────────────────────────────────────────────
+      - name: Download QuaZip
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          Invoke-WebRequest `
+            -Uri "https://github.com/stachenov/quazip/archive/refs/tags/v1.4.tar.gz" `
+            -OutFile quazip.tar.gz
+
+          tar -xzf quazip.tar.gz
+          Remove-Item quazip.tar.gz
+        shell: pwsh
+
+      - name: Build QuaZip
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        working-directory: quazip-1.4
+        run: |
+          $ZlibRoot = "$env:GITHUB_WORKSPACE\zlib"
+
+          New-Item -ItemType Directory -Force -Path build
+          Push-Location build
+
+          cmake -G "NMake Makefiles" `
+            -DZLIB_LIBRARY="$ZlibRoot\build\zlibstatic.lib" `
+            -DZLIB_INCLUDE_DIR="$ZlibRoot" `
+            -DCMAKE_BUILD_TYPE=Release `
+            ..
+
+          nmake
+          Pop-Location
+        shell: pwsh
+
+      - name: Setup QuaZip sibling directory
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          $QuazipSibling = "quazip-${{ env.QT_VERSION }}-1.4intuisphere"
+
+          New-Item -ItemType Directory -Force `
+            -Path "$QuazipSibling\lib"
+
+          New-Item -ItemType Directory -Force `
+            -Path "$QuazipSibling\include\QuaZip-Qt6-1.4\quazip"
+
+          Copy-Item `
+            "quazip-1.4\build\quazip\quazip1-qt6.lib" `
+            "$QuazipSibling\lib\"
+
+          Copy-Item `
+            "quazip-1.4\build\quazip\quazip1-qt6.dll" `
+            "$QuazipSibling\lib\" `
+            -ErrorAction SilentlyContinue
+
+          Copy-Item `
+            "quazip-1.4\quazip\*.h" `
+            "$QuazipSibling\include\QuaZip-Qt6-1.4\quazip\"
+        shell: pwsh
+
+      # ── 7. Setup Clipper ──────────────────────────────────────────────────
+      - name: Download and build Clipper
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          curl.exe -L `
+            -o clipper.zip `
+            "https://sourceforge.net/projects/polyclipping/files/clipper_ver6.4.2.zip/download"
+
+          Expand-Archive `
+            -Path clipper.zip `
+            -DestinationPath clipper-src
+
+          Remove-Item clipper.zip
+
+          New-Item -ItemType Directory -Force `
+            -Path "Clipper1-6.4.2\include\polyclipping"
+
+          New-Item -ItemType Directory -Force `
+            -Path "Clipper1-6.4.2\lib"
+
+          $cppDir = Get-ChildItem `
+            -Path "clipper-src" `
+            -Recurse `
+            -Filter "clipper.hpp" |
+            Select-Object -First 1 -ExpandProperty DirectoryName
+
+          if (-not $cppDir) {
+            throw "clipper.hpp not found"
+          }
+
+          Copy-Item `
+            "$cppDir\clipper.hpp" `
+            "Clipper1-6.4.2\include\polyclipping\"
+
+          Copy-Item `
+            "$cppDir\clipper.cpp" `
+            "Clipper1-6.4.2\include\polyclipping\"
+
+          Push-Location "Clipper1-6.4.2"
+
+          cl /c /O2 /EHsc /MD `
+            /Iinclude\polyclipping `
+            include\polyclipping\clipper.cpp
+
+          lib /OUT:polyclipping.lib clipper.obj
+
+          Move-Item polyclipping.lib lib\
+
+          Remove-Item clipper.obj `
+            -ErrorAction SilentlyContinue
+
+          Pop-Location
+
+          Remove-Item "clipper-src" `
+            -Recurse `
+            -Force `
+            -ErrorAction SilentlyContinue
+        shell: pwsh
+
+      # ── 8. Header-only and pre-built dependencies ─────────────────────────
+      - name: Download Boost
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          Invoke-WebRequest `
+            -Uri "https://archives.boost.io/release/1.85.0/source/boost_1_85_0.tar.gz" `
+            -OutFile boost.tar.gz
+
+          tar -xzf boost.tar.gz
+          Remove-Item boost.tar.gz
+        shell: pwsh
+
+      - name: Download SVG++
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          Invoke-WebRequest `
+            -Uri "https://github.com/svgpp/svgpp/archive/refs/tags/v1.3.1.tar.gz" `
+            -OutFile svgpp.tar.gz
+
+          tar -xzf svgpp.tar.gz
+          Remove-Item svgpp.tar.gz
+        shell: pwsh
+
+      - name: Download ngspice
+        if: steps.deps-cache.outputs.cache-hit != 'true'
+        run: |
+          curl.exe -L `
+            -o ngspice.7z `
+            "https://sourceforge.net/projects/ngspice/files/ng-spice-rework/old-releases/42/ngspice-42_dll_64.7z/download"
+
+          7z x ngspice.7z -ongspice-extract
+
+          if (Test-Path "ngspice-extract\Spice64_dll") {
+            Move-Item `
+              "ngspice-extract\Spice64_dll" `
+              "ngspice-42"
+          }
+          elseif (Test-Path "ngspice-extract\ngspice-42") {
+            Move-Item `
+              "ngspice-extract\ngspice-42" `
+              .
+          }
+          else {
+            Rename-Item `
+              "ngspice-extract" `
+              "ngspice-42"
+          }
+
+          Remove-Item ngspice.7z `
+            -ErrorAction SilentlyContinue
+
+          Remove-Item ngspice-extract `
+            -Recurse `
+            -Force `
+            -ErrorAction SilentlyContinue
+        shell: pwsh
+
+      # ── 9. Verify dependency structure ────────────────────────────────────
+      - name: Verify dependency layout
+        run: |
+          Write-Host "=== Directory Structure ==="
+
+          Write-Host "--- libgit2 ---"
+
+          Get-ChildItem `
+            "libgit2\include\git2.h" `
+            -ErrorAction SilentlyContinue
+
+          Get-ChildItem `
+            "libgit2\build64" `
+            -Recurse `
+            -Filter "git2.lib" `
+            -ErrorAction SilentlyContinue
+
+          Get-ChildItem `
+            "libgit2\build64" `
+            -Recurse `
+            -Filter "git2.dll" `
+            -ErrorAction SilentlyContinue
+
+          Write-Host "--- QuaZip ---"
+
+          $qz = "quazip-${{ env.QT_VERSION }}-1.4intuisphere"
+
+          Get-ChildItem `
+            "$qz\lib\*" `
+            -ErrorAction SilentlyContinue
+
+          Get-ChildItem `
+            "$qz\include\QuaZip-Qt6-1.4\quazip\*.h" `
+            -ErrorAction SilentlyContinue |
+            Select-Object -First 3
+
+          Write-Host "--- Clipper ---"
+
+          Get-ChildItem `
+            "Clipper1-6.4.2\include\polyclipping\*" `
+            -ErrorAction SilentlyContinue
+
+          Get-ChildItem `
+            "Clipper1-6.4.2\lib\*" `
+            -ErrorAction SilentlyContinue
+
+          Write-Host "--- Boost ---"
+          Test-Path "boost_1_85_0\boost\version.hpp"
+
+          Write-Host "--- SVG++ ---"
+          Test-Path "svgpp-1.3.1\include"
+
+          Write-Host "--- ngspice ---"
+          Test-Path "ngspice-42\include"
+        shell: pwsh
+
+      # ── 10. Configure Fritzing ────────────────────────────────────────────
+      - name: Clean qmake cache
+        working-directory: fritzing-app
+        run: |
+          if (Test-Path .qmake.cache) {
+            Remove-Item .qmake.cache
+          }
+
+          if (Test-Path .qmake.stash) {
+            Remove-Item .qmake.stash
+          }
+        shell: pwsh
+
+      - name: Setup libgit2 compatibility directory
+        run: |
+          $CompatDir = "libgit2-${{ env.LIBGIT2_VERSION }}"
+
+          if (Test-Path $CompatDir) {
+            Remove-Item `
+              $CompatDir `
+              -Recurse `
+              -Force
+          }
+
+          New-Item `
+            -ItemType Directory `
+            -Force `
+            -Path "$CompatDir\include"
+
+          New-Item `
+            -ItemType Directory `
+            -Force `
+            -Path "$CompatDir\lib"
+
+          Copy-Item `
+            "libgit2\include\*" `
+            "$CompatDir\include\" `
+            -Recurse
+
+          $GitLib = Get-ChildItem `
+            "libgit2\build64" `
+            -Recurse `
+            -Filter "git2.lib" |
+            Select-Object -First 1
+
+          $GitDll = Get-ChildItem `
+            "libgit2\build64" `
+            -Recurse `
+            -Filter "git2.dll" |
+            Select-Object -First 1
+
+          if (-not $GitLib) {
+            throw "git2.lib not found"
+          }
+
+          if (-not $GitDll) {
+            throw "git2.dll not found"
+          }
+
+          Copy-Item `
+            $GitLib.FullName `
+            "$CompatDir\lib\git2.lib"
+
+          Copy-Item `
+            $GitDll.FullName `
+            "$CompatDir\lib\git2.dll"
+
+          Write-Host "libgit2 compatibility layout:"
+
+          Get-ChildItem `
+            $CompatDir `
+            -Recurse |
+            Select-Object FullName
+        shell: pwsh
+
+      - name: Configure Fritzing (qmake)
+        working-directory: fritzing-app
+        run: |
+          qmake phoenix.pro
+        shell: pwsh
+
+      - name: Build Fritzing (nmake)
+        working-directory: fritzing-app
+        run: nmake release
+        shell: cmd
+
+      # ── 11. Deploy Qt runtime DLLs ────────────────────────────────────────
+      - name: Deploy Qt (windeployqt)
+        working-directory: release64
+        run: |
+          windeployqt Fritzing.exe
+        shell: cmd
+
+      # ── 12. Copy Third-Party DLLs & Runtime Data ──────────────────────────
+      - name: Copy third-party DLLs and data folders
+        run: |
+          # QuaZip
+          Copy-Item `
+            "quazip-${{ env.QT_VERSION }}-1.4intuisphere\lib\*.dll" `
+            "release64\" `
+            -ErrorAction SilentlyContinue
+
+          # libgit2
+          Copy-Item `
+            "libgit2-${{ env.LIBGIT2_VERSION }}\lib\git2.dll" `
+            "release64\" `
+            -Force
+
+          # ngspice
+          Copy-Item `
+            "ngspice-42\*.dll" `
+            "release64\" `
+            -ErrorAction SilentlyContinue
+
+          # Qt 5 compatibility runtime
+          Copy-Item `
+            "$env:QT_ROOT_DIR\bin\Qt6Core5Compat.dll" `
+            "release64\" `
+            -ErrorAction SilentlyContinue
+
+          # Runtime data
+          Copy-Item `
+            "fritzing-app\help" `
+            "release64\" `
+            -Recurse `
+            -Force
+
+          Copy-Item `
+            "fritzing-app\sketches" `
+            "release64\" `
+            -Recurse `
+            -Force
+
+          Copy-Item `
+            "fritzing-app\translations" `
+            "release64\" `
+            -Recurse `
+            -Force
+        shell: pwsh
+
+      # ── 13. Extract Fritzing version ──────────────────────────────────────
+      - name: Extract Fritzing Version
+        run: |
+          $verFile = "fritzing-app\src\version\version.cpp"
+
+          $content = Get-Content `
+            -Raw `
+            -Path $verFile
+
+          $major = (
+            [regex]'m_majorVersion\("(.*?)"\)'
+          ).Match($content).Groups[1].Value
+
+          $minor = (
+            [regex]'m_minorVersion\("(.*?)"\)'
+          ).Match($content).Groups[1].Value
+
+          $patch = (
+            [regex]'m_minorSubVersion\("(.*?)"\)'
+          ).Match($content).Groups[1].Value
+
+          $mod = (
+            [regex]'m_modifier\("(.*?)"\)'
+          ).Match($content).Groups[1].Value
+
+          $versionStr = "$major.$minor.$patch$mod"
+
+          echo "FRITZING_VER=$versionStr" >> $env:GITHUB_ENV
+
+          Write-Host "Fritzing version: $versionStr"
+        shell: pwsh
+
+      # ── 14. Create base ZIP ────────────────────────────────────────────────
+      - name: Create base Windows ZIP
+        run: |
+          $zipName = "Fritzing-$env:FRITZING_VER-Windows-x64.zip"
+
+          Compress-Archive `
+            -Path "release64\*" `
+            -DestinationPath $zipName
+
+          echo "BASE_ZIP_FILE=$zipName" >> $env:GITHUB_ENV
+        shell: pwsh
+
+      # ── 15. Prepare Online Installer ──────────────────────────────────────
+      - name: Zip fritzing-parts for Online Installer
+        run: |
+          git clone `
+            --no-hardlinks `
+            fritzing-parts `
+            fritzing-parts-zip/fritzing-parts
+
+          git `
+            -C fritzing-parts-zip/fritzing-parts `
+            remote set-url origin `
+            https://github.com/fritzing/fritzing-parts.git
+
+          Push-Location fritzing-parts-zip
+
+          7z a `
+            -tzip `
+            ..\fritzing-parts.zip `
+            fritzing-parts
+
+          Pop-Location
+
+          Remove-Item `
+            fritzing-parts-zip `
+            -Recurse `
+            -Force
+        shell: pwsh
+
+      - name: Compile Online Setup
+        run: |
+          Copy-Item `
+            "fritzing-build\fritzing_setup.iss" `
+            ".\" `
+            -Force
+
+          # Apunta al release de este Gitea (no al de GitHub).
+          $PartsUrl = `
+            "${{ github.server_url }}/${{ github.repository }}/releases/download/$env:FRITZING_VER/fritzing-parts.zip"
+
+          & "C:\Program Files (x86)\Inno Setup 6\ISCC.exe" `
+            /dMyAppVersion="$env:FRITZING_VER" `
+            /dOnlineInstaller=1 `
+            /dPartsDownloadUrl="$PartsUrl" `
+            "fritzing_setup.iss"
+
+          echo `
+            "ONLINE_SETUP_FILE=Fritzing-$env:FRITZING_VER-OnlineSetup-Windows-x64.exe" `
+            >> $env:GITHUB_ENV
+        shell: pwsh
+
+      # ── 16. Bundle fritzing-parts for Offline/Portable ────────────────────
+      - name: Clone fritzing-parts into release64
+        run: |
+          git clone \
+            --no-hardlinks \
+            fritzing-parts \
+            release64/fritzing-parts
+
+          git \
+            -C release64/fritzing-parts \
+            remote set-url origin \
+            https://github.com/fritzing/fritzing-parts.git
+        shell: bash
+
+      # ── 17. Create Portable ZIP ────────────────────────────────────────────
+      - name: Compress Portable ZIP
+        run: |
+          $zipName = `
+            "Fritzing-$env:FRITZING_VER-Portable-Windows-x64.zip"
+
+          Push-Location release64
+
+          7z a `
+            -tzip `
+            "..\$zipName" `
+            *
+
+          Pop-Location
+
+          echo "ZIP_FILE=$zipName" >> $env:GITHUB_ENV
+        shell: pwsh
+
+      # ── 18. Compile Offline Installer ─────────────────────────────────────
+      - name: Compile Offline Setup
+        run: |
+          & "C:\Program Files (x86)\Inno Setup 6\ISCC.exe" `
+            /dMyAppVersion="$env:FRITZING_VER" `
+            /dOnlineInstaller=0 `
+            "fritzing_setup.iss"
+
+          echo `
+            "OFFLINE_SETUP_FILE=Fritzing-$env:FRITZING_VER-OfflineSetup-Windows-x64.exe" `
+            >> $env:GITHUB_ENV
+        shell: pwsh
+
+      # ── 19. Upload Artifacts ───────────────────────────────────────────────
+      #
+      # MUY IMPORTANTE:
+      # aunque el paso posterior de la Release falle, estos ficheros
+      # quedarán disponibles en Actions -> Summary -> Artifacts.
+      #
+      - name: Upload Fritzing build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: Fritzing-${{ env.FRITZING_VER }}-Windows-x64
+          path: |
+            ${{ env.BASE_ZIP_FILE }}
+            ${{ env.ZIP_FILE }}
+            ${{ env.ONLINE_SETUP_FILE }}
+            ${{ env.OFFLINE_SETUP_FILE }}
+            fritzing-parts.zip
+          if-no-files-found: error
+          compression-level: 0
+          retention-days: 30
+
+      # ── 20. Create Gitea Release ───────────────────────────────────────────
+      #
+      # Gitea Actions expone un token de API equivalente al GITHUB_TOKEN de
+      # GitHub (secrets.GITHUB_TOKEN), válido contra la API de este mismo
+      # Gitea. No hay acción "release" oficial de Gitea instalada, así que
+      # se usa la API REST directamente (igual que ya hace el resto del
+      # workflow con curl.exe para otras descargas).
+      #
+      - name: Create Gitea Release and upload assets
+        if: github.ref == 'refs/heads/master'
+        shell: pwsh
+        env:
+          GITEA_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITEA_API: ${{ github.server_url }}/api/v1/repos/${{ github.repository }}
+        run: |
+          $headers = @{ Authorization = "token $env:GITEA_TOKEN" }
+
+          $releaseBody = @{
+            tag_name = $env:FRITZING_VER
+            name     = "Fritzing $env:FRITZING_VER"
+            draft    = $true
+          } | ConvertTo-Json
+
+          $release = Invoke-RestMethod `
+            -Uri "$env:GITEA_API/releases" `
+            -Method Post `
+            -Headers $headers `
+            -Body $releaseBody `
+            -ContentType "application/json"
+
+          $releaseId = $release.id
+          Write-Host "Created release id $releaseId ($env:FRITZING_VER)"
+
+          $files = @(
+            $env:BASE_ZIP_FILE,
+            $env:ZIP_FILE,
+            $env:ONLINE_SETUP_FILE,
+            $env:OFFLINE_SETUP_FILE,
+            "fritzing-parts.zip"
+          )
+
+          foreach ($f in $files) {
+            Write-Host "Uploading asset: $f"
+
+            curl.exe -sS -f -X POST `
+              -H "Authorization: token $env:GITEA_TOKEN" `
+              -F "attachment=@$f" `
+              "$env:GITEA_API/releases/$releaseId/assets?name=$f"
+
+            if ($LASTEXITCODE -ne 0) {
+              throw "Failed to upload $f"
+            }
+          }