v1.9.27: add disconnect button in terminal + disconnect in context menu

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

gui/tabs/powershell_tab.py

@@ -104,6 +104,12 @@ class PowershellTab(ctk.CTkFrame):
         if self._current_alias and not self._client:
             self._connect(self._current_alias)
 
+    def disconnect(self):
+        """Disconnect WinRM and update UI (called by app)."""
+        self._disconnect()
+        if self._current_alias:
+            self._set_status(t("term_click_to_connect").format(alias=self._current_alias), "#f59e0b")
+
     # ── Connection ───────────────────────────────────────────────────
 
     def _connect(self, alias: str):