fix: remove --cache-to flag from non-BuildKit docker build commands

The --cache-to type=inline flag is only valid with DOCKER_BUILDKIT=1.
With BuildKit disabled, it causes docker build to fail with exit 125.
Keep the documentation comments for when BuildKit is re-enabled.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/deploy-claude-dev-dev.yml

@@ -58,7 +58,6 @@ jobs:
           if ! docker image inspect claude-dev-base:latest >/dev/null 2>&1; then
             echo "Base image not found, building claude-dev-base:latest..."
             DOCKER_BUILDKIT=0 docker build \
-              --cache-to type=inline \
               -f claude-dev/Dockerfile.base \
               -t claude-dev-base:latest \
               claude-dev/
@@ -69,7 +68,6 @@ jobs:
           # Build runtime image (fast, just copies scripts)
           DOCKER_BUILDKIT=0 docker build \
             --cache-from claude-dev:latest \
-            --cache-to type=inline \
             -t "$CLAUDE_DEV_IMAGE" \
             -t claude-dev:latest \
             claude-dev/

.gitea/workflows/deploy-dev.yml

@@ -190,7 +190,7 @@ jobs:
           # Docker Engine version with full BuildKit support (currently 24.x, needs 23+).
           # --cache-to type=inline is a no-op while BuildKit is disabled; it activates
           # automatically when DOCKER_BUILDKIT=0 is removed.
-          if ! DOCKER_BUILDKIT=0 docker build --cache-from nas-dashboard-dev:latest --cache-to type=inline -t nas-dashboard-dev:latest dashboard/; then
+          if ! DOCKER_BUILDKIT=0 docker build --cache-from nas-dashboard-dev:latest -t nas-dashboard-dev:latest dashboard/; then
             echo "Build failed. Checking for network issues..."
             curl -I https://registry.npmmirror.com || echo "npmmirror unreachable"
             curl -I https://pypi.tuna.tsinghua.edu.cn || echo "Tsinghua PyPI unreachable"

.gitea/workflows/deploy.yml

@@ -215,7 +215,7 @@ jobs:
           # Docker Engine version with full BuildKit support (currently 24.x, needs 23+).
           # --cache-to type=inline is a no-op while BuildKit is disabled; it activates
           # automatically when DOCKER_BUILDKIT=0 is removed.
-          if ! DOCKER_BUILDKIT=0 docker build --cache-from nas-dashboard:latest --cache-to type=inline -t nas-dashboard:latest dashboard/; then
+          if ! DOCKER_BUILDKIT=0 docker build --cache-from nas-dashboard:latest -t nas-dashboard:latest dashboard/; then
             echo "Build failed. Checking for network issues..."
             curl -I https://registry.npmmirror.com || echo "npmmirror unreachable"
             curl -I https://pypi.tuna.tsinghua.edu.cn || echo "Tsinghua PyPI unreachable"