services: add KDE Connect phone/desktop integration

Apt-based service for Android/iPhone ↔ Linux integration: shared
clipboard, notifications, file transfer, remote input. Works on Ubuntu
(GNOME) and Linux Mint Cinnamon. Opens UFW ports 1714-1764 automatically.

https://claude.ai/code/session_014CCYqVwW6d6f5dw1qRokYt

README.md

@@ -71,7 +71,7 @@ Update them any time with `sudo ./setup.sh configure`.
 | `media` | `arm`, `audiobookshelf`, `emby`, `immich`, `jellyfin`, `lyrion` |
 | `cameras` | `frigate`, `frigate-audio`, `frigate-notify`, `sky-cam` |
 | `gaming` | `js99er`, `minecraft`, `wolf`, `wolf-pair` |
-| `extras` | `silent-send`, `sync-cc` |
+| `extras` | `kdeconnect`, `silent-send`, `sync-cc` |
 | `backup` | `backup` — complete recovery: entire `~/docker/<service>/` for every service via Kopia (Minecraft: flush+snap, no downtime; others: stop/snap/start for DB consistency); `borg-backup` — same coverage via Borg (chunk dedup, SSH remote repos, Borgmatic/Vorta compatible); `gaming-backup` — frequent game-save snapshots (Minecraft world data, emulator saves, Steam — no downtime, run hourly) |
 
 Run `./setup.sh --list` to see descriptions.