fix(#812): resolve subpath-mounted gitea repo slug

packages/mosaic/framework/tools/git/pr-review.sh

@@ -109,7 +109,6 @@ elif [[ "$PLATFORM" == "gitea" ]]; then
                 exit 1
             fi
 
-            repo=$(get_repo_slug)
             host=$(get_remote_host)
             token=$(get_gitea_token "$host") || {
                 echo "Error: Gitea token not found for comment persistence" >&2
@@ -119,6 +118,10 @@ elif [[ "$PLATFORM" == "gitea" ]]; then
                 echo "Error: Configured Gitea URL not found for comment persistence" >&2
                 exit 1
             }
+            repo=$(get_gitea_repo_slug_for_url "$configured_url") || {
+                echo "Error: Could not resolve Gitea owner/repository relative to configured URL" >&2
+                exit 1
+            }
             api_base="${configured_url%/}/api/v1/repos/$repo"
             payload=$(COMMENT_BODY="$COMMENT" python3 -c '
 import json