ntfy

Features:

• Add per-visitor rate limit on new topic creations (visitor-topic-creation-limit-burst / visitor-topic-creation-limit-replenish, defaults 100 burst / 1m replenish) to mitigate topic-enumeration / squatting attacks that inflate the in-memory topic map

Bug fixes + maintenance:

• Remove stacktrace-js, stacktrace-gps, humanize-duration, and js-base64 from the web app to reduce dependency and security footprint
• Restrict the publish dialog’s local file preview to safe image types (png/jpg/gif/webp) to prevent same-origin script execution from blob URLs when previewing a crafted SVG (GHSA-j8hr-p342-xrmh, thanks to @Venukamatchi for reporting)