🐛 fix: lambda closure crash + .bat version noise on Windows

Bug 1 — UartMonitorWindow crash on serial open failure:
- lambda: self._show_unavailable(str(e))  →  lambda e=e: ...
- Python 3 deletes 'e' after except block; default arg captures it

Bug 2 — xsct version shows 'ECHO 处于关闭状态。' on Windows:
- .bat wrappers output 'ECHO is off' / 'ECHO 处于关闭状态。' noise
- _is_batch_noise() filters known patterns (EN+ZH)
- Version regex now scans all output lines, skipping noise lines
- Path-based fallback (2023.2) catches any remaining undetectable cases

src/gui/widgets.py

@@ -1079,7 +1079,7 @@ class UartMonitorWindow(ctk.CTkToplevel):
                 ser.close()
                 self.after(0, self._on_open_success)
             except Exception as e:
-                self.after(0, lambda: self._show_unavailable(str(e)))
+                self.after(0, lambda e=e: self._show_unavailable(str(e)))
 
         threading.Thread(target=_bg_open, daemon=True).start()
 

src/vitis_checker.py

@@ -324,7 +324,7 @@ def _get_tool_version(tool_path: str) -> str:
     """Get the version string from a tool executable.
 
     Tries (in order):
-    1. tool -version
+    1. tool -version → parse version from output
     2. Extract from path (e.g., .../Vitis/2023.2/bin/xsct → 2023.2)
 
     Args:
@@ -343,14 +343,17 @@ def _get_tool_version(tool_path: str) -> str:
         )
         output = (result.stdout + result.stderr).strip()
         if output:
-            # Look for a version pattern in output
-            m = re.search(r"(\d{4}\.\d+(?:\.\d+)?)", output)
+            # Scan all lines for a version pattern (skip batch echo noise)
+            for raw_line in output.splitlines():
+                line = raw_line.strip()
+                if not line:
+                    continue
+                # Skip Windows batch echo noise
+                if _is_batch_noise(line):
+                    continue
+                m = re.search(r"(\d{4}\.\d+(?:\.\d+)?)", line)
                 if m:
                     return m.group(1)
-            # Return first meaningful line (truncated)
-            line = output.split("\n")[0][:80]
-            if line and "usage" not in line.lower():
-                return line
     except (subprocess.TimeoutExpired, OSError):
         pass
 
@@ -358,6 +361,22 @@ def _get_tool_version(tool_path: str) -> str:
     return _version_from_path(tool_path)
 
 
+def _is_batch_noise(line: str) -> bool:
+    """Check if a line is Windows batch script noise.
+
+    Args:
+        line: A line of output text.
+
+    Returns:
+        True if the line looks like batch echo/status noise.
+    """
+    noise_patterns = [
+        r"^ECHO\s+(is\s+(on|off)|处于)",  # ECHO is on/off (en+zh)
+        r"^[A-Z]:\\[^>]*>",                # Prompt line like C:\path>
+    ]
+    return any(re.search(p, line, re.IGNORECASE) for p in noise_patterns)
+
+
 # ── Main check function ──────────────────────────────────────────────