SSH keys in account settings; wrappers for agents, terminal and git

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

CHANGELOG.md

@@ -3,6 +3,14 @@
 All notable changes to CodeCraft. Versions follow [Semantic Versioning](https://semver.org/);
 until 1.0, minor versions may contain breaking changes.
 
+## [Unreleased]
+
+### Added
+
+- **SSH keys** (Settings → Account): generate (ed25519) or import keys; agents, the terminal and the
+  git panel use them automatically for `ssh`, `scp`, `sftp`, `rsync` and git over ssh. Hosts are
+  trusted on first contact; the public key can be copied for the server's `authorized_keys`.
+
 ## [v202611-00032] – 2026-11-15
 
 ### Fixed