v1.8.7: fix Ctrl+key for non-Latin keyboard layouts

- Replace Cyrillic char bindings (tkinter rejects them) with keycode dispatch
- <Control-Key> handler routes by physical keycode (67=C, 86=V, etc.)
- Works with Russian, Ukrainian, and any other keyboard layout

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

gui/widgets/terminal_widget.py

@@ -224,14 +224,8 @@ class TerminalWidget(tk.Frame):
         self._text.bind("<Control-Shift-C>", self._on_copy)
         self._text.bind("<Control-Shift-V>", self._on_ctrl_v)
         self._text.bind("<<Paste>>", lambda e: "break")
-        # Russian keyboard layout: Cyrillic equivalents (Windows)
-        self._text.bind("<Control-\u0441>", self._on_ctrl_c)  # с
-        self._text.bind("<Control-\u043c>", self._on_ctrl_v)  # м (Ctrl+V → м)
-        self._text.bind("<Control-\u0432>", self._on_ctrl_d)  # в (Ctrl+D → в)
-        self._text.bind("<Control-\u0434>", self._on_ctrl_l)  # д (Ctrl+L → д)
-        self._text.bind("<Control-\u044f>", self._on_ctrl_z)  # я (Ctrl+Z → я)
-        self._text.bind("<Control-Shift-\u0421>", self._on_copy)  # С (Shift)
-        self._text.bind("<Control-Shift-\u041c>", self._on_ctrl_v)  # М (Shift)
+        # Handle Ctrl+key by keycode — works with ANY keyboard layout
+        self._text.bind("<Control-Key>", self._on_ctrl_key)
 
         # ── Mouse bindings ──
         self._text.bind("<Button-1>", self._on_mouse_press)
@@ -703,6 +697,27 @@ class TerminalWidget(tk.Frame):
 
         return "break"
 
+    # ── Ctrl+Key by keycode — works with any keyboard layout ──
+    _CTRL_KEYCODE_MAP = {
+        67: '_on_ctrl_c',   # C
+        86: '_on_ctrl_v',   # V
+        68: '_on_ctrl_d',   # D
+        76: '_on_ctrl_l',   # L
+        90: '_on_ctrl_z',   # Z
+    }
+
+    def _on_ctrl_key(self, event):
+        """Route Ctrl+key by physical keycode (layout-independent)."""
+        handler_name = self._CTRL_KEYCODE_MAP.get(event.keycode)
+        if handler_name:
+            # Check if Shift is also held
+            if event.state & 0x1 and event.keycode == 67:
+                return self._on_copy(event)
+            if event.state & 0x1 and event.keycode == 86:
+                return self._on_ctrl_v(event)
+            return getattr(self, handler_name)(event)
+        return None  # let other bindings handle it
+
     # ── Ctrl+C: copy or SIGINT (double-press within 1.5s) ──
     def _on_ctrl_c(self, event):
         if event.state & 0x1:  # Shift held → Ctrl+Shift+C → copy