docs(changelog): stamp #7315 (SIGINT graceful shutdown)

CHANGELOG.md

@@ -5,6 +5,8 @@
 
 ### Fixed
 
+- **Ctrl-C and `ctl.sh`-launched daemons now shut down gracefully instead of leaving the server running.** The WebUI installed a SIGTERM handler that drains in-flight work through `serve_forever()`'s `finally`, but SIGINT fell through to Python's default, so a daemon started via `./ctl.sh start` could only be stopped with `kill <pid>` and the Settings "Stop server" button did not stop it. SIGINT now shares the same idempotent graceful-shutdown handler as SIGTERM. Thanks @aniruddhaadak80. (#7315, closes #7078)
+
 - **Static assets are served with correct MIME types instead of a `text/plain` catch-all.** `_serve_static()` defaulted every extension outside its small built-in allowlist to `text/plain; charset=utf-8`, mislabeling PDFs, APKs, WASM and other binaries. Unknown extensions now resolve through Python's standard `mimetypes` database, with an explicit deterministic entry for `.apk` (whose type varies across host MIME databases), and fail closed to `application/octet-stream` for unknown or pre-encoded suffixes (`.svgz`/`.tgz`/`.js.gz`) so still-compressed bytes are never advertised with their decoded media type. Path containment, gzip/ETag/cache handling, and the text charset path are unchanged. Thanks @Oidaladn0. (#7372)
 
 - **Chat-attachment uploads are created atomically so a raced duplicate or symlink can't silently overwrite or redirect the write.** `handle_upload` deduped filenames with an `exists()` check and then wrote with a plain `write_bytes`, so two concurrent uploads of the same name both passed the check and the last writer silently won — leaving one client a `200` naming bytes no longer on disk. The final create now uses the existing descriptor-anchored `open_anchored_create_fd` (`O_CREAT|O_EXCL|O_NOFOLLOW`, mirroring the #3398 workspace-upload hardening): a raced duplicate returns `409` instead of overwriting, and a symlink raced into the attachment path cannot redirect the write outside the session inbox. The normal success path, size/MIME handling, and `-1` dedup suffixing are unchanged. Thanks @zicochaos. (#7337)