fix: tag bump on tagless repo by walking full HEAD range

git describe falls back to literal "v0.0.0" when no tags exist; the
subsequent git log v0.0.0..HEAD then fails silently and the workflow
skips, so the very first feat: commit never produces a tag.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/auto-tag.yml

@@ -20,10 +20,15 @@ jobs:
       - name: Determine version bump and create tag
         id: bump
         run: |
-          LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null || echo "v0.0.0")
+          if LATEST_TAG=$(git describe --tags --abbrev=0 2>/dev/null); then
+            RANGE="${LATEST_TAG}..HEAD"
+          else
+            LATEST_TAG="v0.0.0"
+            RANGE="HEAD"
+          fi
           echo "Latest tag: $LATEST_TAG"
 
-          COMMITS=$(git log "${LATEST_TAG}..HEAD" --pretty=format:"%s" 2>/dev/null)
+          COMMITS=$(git log "$RANGE" --pretty=format:"%s")
           if [ -z "$COMMITS" ]; then
             echo "No new commits since ${LATEST_TAG}, skipping."
             exit 0