fix: tz-less date parse in local tz instead of utc (closes #1615)

Jacky Zhao

2025-06-02 1cfc87652c0b4889ab62e1010da9d988f08c4cd1

 quartz/plugins/transformers/frontmatter.ts

@@ -101,7 +101,11 @@
            const socialImage = coalesceAliases(data, ["socialImage", "image", "cover"])

            const created = coalesceAliases(data, ["created", "date"])
            if (created) data.created = created
            if (created) {
              data.created = created
              data.modified ||= created // if modified is not set, use created
            }

            const modified = coalesceAliases(data, [
              "modified",
              "lastmod",