(refactor) extract version check workflows into reusable components

- Create check_package_version.yml reusable workflow
  - Add workspacePath input for flexible package.json location
  - Fix path concatenation to handle root directory cleanly
  - Expose version_changed and version outputs

- Create check_image_version.yml reusable workflow
  - Add workspacePath, imageName, registryUrl, registryUsername, and registryNamespace inputs
  - Make fully generic and portable across different registries
  - Fix path handling for clean path generation
  - Rename secret to registryToken for clarity

- Update build.yml to use reusable workflows
  - Replace inline jobs with workflow_call references
  - Pass all required parameters explicitly
  - Maintain existing conditional logic in build job

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.gitea/workflows/check_package_version.yml

@@ -0,0 +1,75 @@
+name: Check Package Version
+
+on:
+  workflow_call:
+    inputs:
+      workspacePath:
+        description: 'Path relative to repo root where package.json is located'
+        required: false
+        type: string
+        default: '.'
+    outputs:
+      version_changed:
+        description: 'Whether the version changed from the previous commit'
+        value: ${{ jobs.check_version.outputs.version_changed }}
+      version:
+        description: 'Current version from package.json'
+        value: ${{ jobs.check_version.outputs.version }}
+
+jobs:
+  check_version:
+    runs-on: ubuntu-latest
+    outputs:
+      version_changed: ${{ steps.version-check.outputs.version_changed }}
+      version: ${{ steps.version-check.outputs.version }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Check if version changed
+        id: version-check
+        run: |
+          WORKSPACE_PATH="${{ inputs.workspacePath }}"
+          # Clean up path - remove trailing slash if present
+          WORKSPACE_PATH="${WORKSPACE_PATH%/}"
+          # Handle root directory case
+          if [ "$WORKSPACE_PATH" = "." ]; then
+            PACKAGE_JSON_PATH="package.json"
+          else
+            PACKAGE_JSON_PATH="${WORKSPACE_PATH}/package.json"
+          fi
+
+          # Get current version
+          CURRENT_VERSION=$(node -p "require('./${PACKAGE_JSON_PATH}').version")
+          echo "Current version: $CURRENT_VERSION"
+          echo "version=$CURRENT_VERSION" >> $GITHUB_OUTPUT
+
+          # Check if HEAD~1 exists (handle first commit)
+          if ! git rev-parse HEAD~1 &>/dev/null; then
+            echo "First commit detected, running workflow"
+            echo "version_changed=true" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Check if package.json exists in previous commit
+          if ! git show HEAD~1:${PACKAGE_JSON_PATH} &>/dev/null; then
+            echo "package.json doesn't exist in previous commit"
+            echo "version_changed=true" >> $GITHUB_OUTPUT
+            exit 0
+          fi
+
+          # Extract previous version using grep/sed (safer than node for old file)
+          PREVIOUS_VERSION=$(git show HEAD~1:${PACKAGE_JSON_PATH} | grep '"version"' | head -1 | sed -E 's/.*"version"\s*:\s*"([^"]+)".*/\1/')
+          echo "Previous version: $PREVIOUS_VERSION"
+
+          # Compare versions
+          if [ "$CURRENT_VERSION" != "$PREVIOUS_VERSION" ]; then
+            echo "Version changed: $PREVIOUS_VERSION -> $CURRENT_VERSION"
+            echo "version_changed=true" >> $GITHUB_OUTPUT
+          else
+            echo "Version unchanged: $CURRENT_VERSION"
+            echo "version_changed=false" >> $GITHUB_OUTPUT
+          fi