v1.5.0: network interface binding, SSH fixes, terminal, release script

- Add network interface selection per server (VPN/multi-NIC support)
- Fix "Install Everything" button hanging on error
- Add interactive SSH terminal with PTY (pyte + xterm-256color)
- Add release.py for automated versioning and changelog generation
- Add CLAUDE.md with project instructions
- Add screenshots and release binaries for v1.1–v1.4

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

core/server_store.py

@@ -44,6 +44,7 @@ class ServerStore:
     def __init__(self):
         self._data: dict = {"servers": [], "ssh_key": {"type": "ed25519", "path": "~/.ssh/id_ed25519"}}
         self._observers: list[Callable] = []
+        self._check_interval: int = 60
         self._statuses: dict[str, str] = {}  # alias -> "online" | "offline" | "unknown"
         self._statuses_lock = threading.Lock()
         self._file_lock = threading.Lock()
@@ -66,6 +67,7 @@ class ServerStore:
                 from core import i18n
                 lang = settings.get("language", "en")
                 i18n.set_language(lang)
+                self._check_interval = settings.get("check_interval", 60)
             except json.JSONDecodeError:
                 log.warning("Corrupted settings.json, using defaults")
             except Exception as e:
@@ -77,6 +79,7 @@ class ServerStore:
         settings = {
             "servers_path": self._servers_file,
             "language": i18n.get_language(),
+            "check_interval": self._check_interval,
         }
         try:
             tmp = SETTINGS_FILE + ".tmp"
@@ -284,6 +287,13 @@ class ServerStore:
 
     # ── Status management (thread-safe) ───────────────
 
+    def get_check_interval(self) -> int:
+        return self._check_interval
+
+    def set_check_interval(self, seconds: int):
+        self._check_interval = max(10, min(600, seconds))
+        self._save_settings()
+
     def set_status(self, alias: str, status: str):
         with self._statuses_lock:
             self._statuses[alias] = status