fix(versioning): move version bumping to CI build time

Version was never bumped because git rebase doesn't run pre-commit
hooks. CI now appends a YYYYMMDDHHmm timestamp to the upstream base
version and injects it into the Docker image via build arg.

.forgejo/workflows/build.yml

@@ -23,7 +23,9 @@ jobs:
       - name: Get version
         id: version
         run: |
-          VERSION=$(sed -n "s/.*'version' => '\([^']*\)'.*/\1/p" config/constants.php)
+          BASE_VERSION=$(sed -n "s/.*'version' => '\([^']*\)'.*/\1/p" config/constants.php)
+          TIMESTAMP=$(date -u +%Y%m%d%H%M)
+          VERSION="${BASE_VERSION}.${TIMESTAMP}"
           HELPER_VERSION=$(sed -n "s/.*'helper_version' => '\([^']*\)'.*/\1/p" config/constants.php)
           REALTIME_VERSION=$(sed -n "s/.*'realtime_version' => '\([^']*\)'.*/\1/p" config/constants.php)
           echo "VERSION=${VERSION}" >> "$GITHUB_OUTPUT"
@@ -38,6 +40,7 @@ jobs:
       - name: Build image
         run: |
           DOCKER_BUILDKIT=1 docker build -f docker/production/Dockerfile \
+            --build-arg MAPLEDEPLOY_VERSION=${{ steps.version.outputs.VERSION }} \
             -t ${{ env.REGISTRY }}/${{ github.repository }}:${{ steps.version.outputs.VERSION }} \
             -t ${{ env.REGISTRY }}/${{ github.repository }}:latest \
             .

docker/production/Dockerfile

@@ -116,6 +116,16 @@ COPY --chown=www-data:www-data composer.json composer.lock ./
 COPY --chown=www-data:www-data app ./app
 COPY --chown=www-data:www-data bootstrap ./bootstrap
 COPY --chown=www-data:www-data config ./config
+
+# MapleDeploy: inject build version into constants.php at build time.
+# The version in git stays at the upstream value to avoid rebase conflicts.
+# CI passes the timestamped version (e.g. 4.0.0-beta.468.202603140006) as a build arg.
+ARG MAPLEDEPLOY_VERSION=""
+RUN if [ -n "$MAPLEDEPLOY_VERSION" ]; then \
+      sed -i "s/'version' => '[^']*'/'version' => '$MAPLEDEPLOY_VERSION'/" config/constants.php && \
+      chown www-data:www-data config/constants.php; \
+    fi
+
 COPY --chown=www-data:www-data database ./database
 COPY --chown=www-data:www-data lang ./lang
 COPY --chown=www-data:www-data public ./public