Fix Linux CPU sidecar bundling CUDA, add cleanup workflow

Linux CPU sidecar: PyPI's default torch on Linux includes CUDA
(~800MB). UV_NO_SOURCES only bypasses our custom CUDA index but
still gets CUDA-enabled torch from PyPI. Now explicitly installs
CPU-only torch from pytorch.org/whl/cpu after sync. Same fix
applied to Windows.

New cleanup-releases.yml workflow (manual trigger):
- Configurable: keep N app releases, keep N sidecar releases
- Dry run mode (default) shows what would be deleted without deleting
- Protects v1.4.0 (last pre-Tauri release)
- Shows release sizes in MB

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.gitea/workflows/build-sidecar-linux.yml

@@ -41,10 +41,11 @@ jobs:
           sudo apt-get install -y portaudio19-dev
 
       - name: Build sidecar (CPU)
-        env:
-          UV_NO_SOURCES: "1"
         run: |
-          uv sync
+          uv sync --no-sources
+          # PyPI's default torch on Linux includes CUDA (~800MB).
+          # Replace with CPU-only torch from the dedicated index.
+          uv pip install torch torchaudio --index-url https://download.pytorch.org/whl/cpu --force-reinstall
           .venv/bin/pyinstaller local-transcription-headless.spec
 
       - name: Package sidecar (CPU)

.gitea/workflows/build-sidecar-windows.yml

@@ -56,10 +56,11 @@ jobs:
 
       - name: Build sidecar (CPU)
         shell: powershell
-        env:
-          UV_NO_SOURCES: "1"
         run: |
+          $env:UV_NO_SOURCES = "1"
           uv sync
+          # PyPI's default torch includes CUDA. Replace with CPU-only.
+          uv pip install torch torchaudio --index-url https://download.pytorch.org/whl/cpu --force-reinstall
           .venv\Scripts\pyinstaller.exe local-transcription-headless.spec
 
       - name: Package sidecar (CPU)

.gitea/workflows/cleanup-releases.yml

@@ -0,0 +1,102 @@
+name: Cleanup Old Releases
+
+on:
+  workflow_dispatch:
+    inputs:
+      keep_app_releases:
+        description: 'Number of app releases to keep'
+        required: false
+        default: '3'
+      keep_sidecar_releases:
+        description: 'Number of sidecar releases to keep'
+        required: false
+        default: '2'
+      dry_run:
+        description: 'Dry run (show what would be deleted without deleting)'
+        required: false
+        default: 'true'
+
+jobs:
+  cleanup:
+    name: Cleanup Old Releases
+    runs-on: ubuntu-latest
+    steps:
+      - name: Cleanup releases
+        env:
+          BUILD_TOKEN: ${{ secrets.BUILD_TOKEN }}
+        run: |
+          REPO_API="${GITHUB_SERVER_URL}/api/v1/repos/${GITHUB_REPOSITORY}"
+          KEEP_APP="${{ inputs.keep_app_releases }}"
+          KEEP_SIDECAR="${{ inputs.keep_sidecar_releases }}"
+          DRY_RUN="${{ inputs.dry_run }}"
+
+          echo "=== Cleanup Configuration ==="
+          echo "Keep app releases: ${KEEP_APP}"
+          echo "Keep sidecar releases: ${KEEP_SIDECAR}"
+          echo "Dry run: ${DRY_RUN}"
+          echo ""
+
+          # Fetch all releases
+          ALL_RELEASES=$(curl -s -H "Authorization: token ${BUILD_TOKEN}" \
+            "${REPO_API}/releases?limit=50")
+
+          # ── App releases (v* tags, not sidecar-v*) ──
+          echo "=== App Releases ==="
+          APP_RELEASES=$(echo "$ALL_RELEASES" | jq -c '[.[] | select(.tag_name | startswith("v")) | select(.tag_name | startswith("sidecar") | not)]')
+          APP_TOTAL=$(echo "$APP_RELEASES" | jq 'length')
+          echo "Found ${APP_TOTAL} app releases, keeping ${KEEP_APP}"
+
+          if [ "$APP_TOTAL" -gt "$KEEP_APP" ]; then
+            echo "$APP_RELEASES" | jq -c ".[$KEEP_APP:][]" | while read -r release; do
+              ID=$(echo "$release" | jq -r '.id')
+              TAG=$(echo "$release" | jq -r '.tag_name')
+              SIZE=$(echo "$release" | jq '[.assets[]?.size // 0] | add // 0')
+              SIZE_MB=$(echo "scale=1; $SIZE / 1048576" | bc 2>/dev/null || echo "?")
+
+              # Protect v1.4.0 (last pre-Tauri release)
+              if [ "$TAG" = "v1.4.0" ]; then
+                echo "  PROTECT ${TAG} (${SIZE_MB} MB)"
+                continue
+              fi
+
+              if [ "$DRY_RUN" = "true" ]; then
+                echo "  WOULD DELETE ${TAG} (ID: ${ID}, ${SIZE_MB} MB)"
+              else
+                echo "  DELETING ${TAG} (ID: ${ID}, ${SIZE_MB} MB)..."
+                curl -s -X DELETE -H "Authorization: token ${BUILD_TOKEN}" \
+                  "${REPO_API}/releases/${ID}"
+              fi
+            done
+          else
+            echo "  Nothing to clean up"
+          fi
+
+          echo ""
+
+          # ── Sidecar releases (sidecar-v* tags) ──
+          echo "=== Sidecar Releases ==="
+          SIDECAR_RELEASES=$(echo "$ALL_RELEASES" | jq -c '[.[] | select(.tag_name | startswith("sidecar-v"))]')
+          SIDECAR_TOTAL=$(echo "$SIDECAR_RELEASES" | jq 'length')
+          echo "Found ${SIDECAR_TOTAL} sidecar releases, keeping ${KEEP_SIDECAR}"
+
+          if [ "$SIDECAR_TOTAL" -gt "$KEEP_SIDECAR" ]; then
+            echo "$SIDECAR_RELEASES" | jq -c ".[$KEEP_SIDECAR:][]" | while read -r release; do
+              ID=$(echo "$release" | jq -r '.id')
+              TAG=$(echo "$release" | jq -r '.tag_name')
+              SIZE=$(echo "$release" | jq '[.assets[]?.size // 0] | add // 0')
+              SIZE_MB=$(echo "scale=1; $SIZE / 1048576" | bc 2>/dev/null || echo "?")
+
+              if [ "$DRY_RUN" = "true" ]; then
+                echo "  WOULD DELETE ${TAG} (ID: ${ID}, ${SIZE_MB} MB)"
+              else
+                echo "  DELETING ${TAG} (ID: ${ID}, ${SIZE_MB} MB)..."
+                curl -s -X DELETE -H "Authorization: token ${BUILD_TOKEN}" \
+                  "${REPO_API}/releases/${ID}"
+              fi
+            done
+          else
+            echo "  Nothing to clean up"
+          fi
+
+          echo ""
+          echo "=== Done ==="