v1.8.98: fix ghost "eue" text in terminal — strip DCS/APC/PM/SOS sequences

pyte 0.8.2 doesn't handle DCS string sequences (ESC P ... ST). When
nano/ncurses sends DECRQSS queries, pyte consumed the introducer but
rendered the payload as visible text. Added regex pre-filter to strip
DCS/APC/PM/SOS sequences before feeding data to pyte.

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

gui/widgets/terminal_widget.py

@@ -6,6 +6,7 @@ DECCKM, bracketed paste, mouse tracking, and professional copy/paste UX.
 
 import codecs
 import copy
+import re
 import sys
 import time
 import tkinter as tk
@@ -44,6 +45,16 @@ _CURSOR_BG  = "#d3d7cf"
 _DECCKM            = 1 << 5       # Application cursor keys
 _BRACKETED_PASTE   = 2004 << 5    # Bracketed paste mode
 _MOUSE_BASIC       = 1000 << 5    # Basic mouse tracking
+
+# ── Strip DCS/APC/PM/SOS string sequences that pyte doesn't handle ────────
+# These would otherwise leak payload bytes as visible text on screen.
+# Matches: ESC P ... ST | ESC _ ... ST | ESC ^ ... ST | ESC X ... ST
+# Also matches C1 variants (0x90, 0x9f, 0x9e, 0x98) and BEL as terminator.
+_DCS_STRING_RE = re.compile(
+    r"(?:\x1b[P_^X]|\x90|\x9f|\x9e|\x98)"  # string introducer
+    r"[^\x1b\x07]*"                          # payload (anything except ESC/BEL)
+    r"(?:\x1b\\|\x07|\x9c)?"                 # string terminator (ST/BEL) or end of data
+)
 _MOUSE_BTN_TRACK   = 1002 << 5    # Button-event mouse tracking
 _MOUSE_ANY         = 1003 << 5    # Any-event mouse tracking
 _MOUSE_SGR         = 1006 << 5    # SGR extended mouse encoding
@@ -343,6 +354,11 @@ class TerminalWidget(tk.Frame):
     def feed(self, data: bytes):
         """Feed raw bytes from SSH into pyte, schedule debounced render."""
         text = self._utf8_decoder.decode(data)
+        if not text:
+            return
+        # Strip DCS/APC/PM/SOS sequences that pyte can't parse
+        # (their payload leaks as visible text otherwise)
+        text = _DCS_STRING_RE.sub("", text)
         if not text:
             return
         self._stream.feed(text)

version.py

@@ -1,6 +1,6 @@
 """Version info for ServerManager."""
 
-__version__ = "1.8.97"
+__version__ = "1.8.98"
 __app_name__ = "ServerManager"
 __author__ = "aibot777"
 __description__ = "Desktop GUI for managing remote servers"