fix: editable alias in server dialog + Ctrl+Z undo for all input fields

- Alias field no longer disabled when editing server profile
- Duplicate alias check on rename, session pool migration
- Enable undo (Ctrl+Z) on all CTkEntry widgets across the project

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

gui/app.py

@@ -129,7 +129,15 @@ class App(ctk.CTk):
         if server:
             dialog = ServerDialog(self, self.store, server=server)
             self.wait_window(dialog)
-            self.info_tab.refresh()
+            # If alias was changed, re-select the new alias
+            if dialog.result and dialog.result.get("alias") != alias:
+                new_alias = dialog.result["alias"]
+                # Sidebar auto-refreshes via store subscription
+                self.sidebar._select(new_alias)
+                # Migrate session pool reference
+                self.session_pool.rename_server(alias, new_alias)
+            else:
+                self.info_tab.refresh()
 
     def _delete_server(self, alias: str):
         if messagebox.askyesno(t("delete_server"), t("delete_confirm").format(alias=alias)):

gui/server_dialog.py

@@ -26,6 +26,7 @@ class ServerDialog(ctk.CTkToplevel):
         super().__init__(master)
         self.store = store
         self.editing = server
+        self._original_alias = server["alias"] if server else None
         self.result = None
 
         self.title(t("edit_server") if server else t("add_server"))
@@ -46,11 +47,15 @@ class ServerDialog(ctk.CTkToplevel):
         ctk.CTkLabel(self, text=t("alias"), anchor="w").pack(fill="x", **pad)
         self.alias_entry = ctk.CTkEntry(self, placeholder_text=t("placeholder_alias"))
         self.alias_entry.pack(fill="x", **entry_pad)
+        # Enable undo functionality
+        self.alias_entry._entry.config(undo=True)
 
         # IP
         ctk.CTkLabel(self, text=t("ip"), anchor="w").pack(fill="x", **pad)
         self.ip_entry = ctk.CTkEntry(self, placeholder_text=t("placeholder_ip"))
         self.ip_entry.pack(fill="x", **entry_pad)
+        # Enable undo functionality
+        self.ip_entry._entry.config(undo=True)
 
         # Type + Port row
         row = ctk.CTkFrame(self, fg_color="transparent")
@@ -71,6 +76,8 @@ class ServerDialog(ctk.CTkToplevel):
         ctk.CTkLabel(port_frame, text=t("port"), anchor="w").pack(fill="x")
         self.port_entry = ctk.CTkEntry(port_frame, placeholder_text=t("placeholder_port"))
         self.port_entry.pack(fill="x")
+        # Enable undo functionality
+        self.port_entry._entry.config(undo=True)
 
         # Network interface
         ctk.CTkLabel(self, text=t("network_interface"), anchor="w").pack(fill="x", **pad)
@@ -90,6 +97,8 @@ class ServerDialog(ctk.CTkToplevel):
         ctk.CTkLabel(self, text=t("username"), anchor="w").pack(fill="x", **pad)
         self.user_entry = ctk.CTkEntry(self, placeholder_text=t("placeholder_user"))
         self.user_entry.pack(fill="x", **entry_pad)
+        # Enable undo functionality
+        self.user_entry._entry.config(undo=True)
 
         # Password
         ctk.CTkLabel(self, text=t("password"), anchor="w").pack(fill="x", **pad)
@@ -97,6 +106,8 @@ class ServerDialog(ctk.CTkToplevel):
         pass_frame.pack(fill="x", padx=20, pady=(2, 5))
         self.password_entry = ctk.CTkEntry(pass_frame, show="*", placeholder_text=t("placeholder_password"))
         self.password_entry.pack(side="left", fill="x", expand=True, padx=(0, 5))
+        # Enable undo functionality
+        self.password_entry._entry.config(undo=True)
         self.show_pass = ctk.CTkButton(pass_frame, text=t("show"), width=60, command=self._toggle_password)
         self.show_pass.pack(side="right")
         self._pass_visible = False
@@ -106,6 +117,8 @@ class ServerDialog(ctk.CTkToplevel):
         self.totp_entry = ctk.CTkEntry(self, placeholder_text=t("placeholder_totp_secret"),
                                         font=ctk.CTkFont(family="Consolas", size=12))
         self.totp_entry.pack(fill="x", **entry_pad)
+        # Enable undo functionality
+        self.totp_entry._entry.config(undo=True)
 
         # Skip status checks
         self.skip_check_var = ctk.BooleanVar(value=False)
@@ -118,6 +131,8 @@ class ServerDialog(ctk.CTkToplevel):
         ctk.CTkLabel(self, text=t("notes"), anchor="w").pack(fill="x", **pad)
         self.notes_entry = ctk.CTkEntry(self, placeholder_text=t("placeholder_notes"))
         self.notes_entry.pack(fill="x", **entry_pad)
+        # Enable undo functionality
+        self.notes_entry._entry.config(undo=True)
 
         # Buttons
         btn_frame = ctk.CTkFrame(self, fg_color="transparent")
@@ -128,7 +143,6 @@ class ServerDialog(ctk.CTkToplevel):
         # Fill values if editing
         if server:
             self.alias_entry.insert(0, server.get("alias", ""))
-            self.alias_entry.configure(state="disabled")
             self.ip_entry.insert(0, server.get("ip", ""))
             self.type_var.set(server.get("type", "ssh"))
             self.port_entry.insert(0, str(server.get("port", 22)))
@@ -213,7 +227,11 @@ class ServerDialog(ctk.CTkToplevel):
 
         try:
             if self.editing:
-                self.store.update_server(alias, server_data)
+                # Check for alias conflict if alias was changed
+                if alias != self._original_alias and self.store.get_server(alias):
+                    self._show_error(t("alias_exists").format(alias=alias))
+                    return
+                self.store.update_server(self._original_alias, server_data)
             else:
                 self.store.add_server(server_data)
             self.result = server_data

gui/sidebar.py

@@ -29,6 +29,8 @@ class Sidebar(ctk.CTkFrame):
         self.search_var.trace_add("write", lambda *_: self._refresh_list())
         self.search_entry = ctk.CTkEntry(self, placeholder_text=t("search"), textvariable=self.search_var)
         self.search_entry.pack(fill="x", padx=10, pady=(5, 10))
+        # Enable undo functionality
+        self.search_entry._entry.config(undo=True)
 
         # Server list
         self.list_frame = ctk.CTkScrollableFrame(self, fg_color="transparent")

gui/tabs/files_tab.py

@@ -131,6 +131,8 @@ class FilesTab(ctk.CTkFrame):
         self._local_path_entry = ctk.CTkEntry(left_header, height=28)
         self._local_path_entry.pack(side="left", fill="x", expand=True, padx=(4, 0))
         self._local_path_entry.bind("<Return>", lambda e: self._local_go_to_path())
+        # Enable undo functionality
+        self._local_path_entry._entry.config(undo=True)
 
         self._local_list = FileListWidget(
             left_pane,
@@ -177,6 +179,8 @@ class FilesTab(ctk.CTkFrame):
         self._remote_path_entry = ctk.CTkEntry(right_header, height=28)
         self._remote_path_entry.pack(side="left", fill="x", expand=True, padx=(4, 0))
         self._remote_path_entry.bind("<Return>", lambda e: self._remote_go_to_path())
+        # Enable undo functionality
+        self._remote_path_entry._entry.config(undo=True)
 
         self._remote_list = FileListWidget(
             right_pane,

gui/tabs/totp_tab.py

@@ -106,6 +106,8 @@ class TOTPTab(ctk.CTkFrame):
             font=ctk.CTkFont(family="Consolas", size=12)
         )
         self.secret_entry.pack(side="left", fill="x", expand=True, padx=(0, 5))
+        # Enable undo functionality
+        self.secret_entry._entry.config(undo=True)
 
         self.show_secret_btn = ctk.CTkButton(
             entry_row, text=t("show"), width=70,