chore: add release binaries v1.6.x, v1.8.9-v1.8.23 and fix MSYS path conversion

- Add 17 release executables that were missing from the remote repo
- Fix MSYS path conversion issue in tools/ssh.py for Windows compatibility
- Add nul to .gitignore to prevent Windows special file conflicts

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

.gitignore

@@ -17,3 +17,4 @@ build/
 .vscode/
 .idea/
 *.swp
+nul

tools/ssh.py

@@ -1,4 +1,6 @@
 #!/usr/bin/env python3
+# Disable MSYS path conversion to prevent Windows path conversion issues
+os.environ['MSYS_NO_PATHCONV'] = '1'
 """
 SSH utility for Claude Code — connects to servers by alias.
 Credentials stored locally in servers.json (encrypted), NEVER exposed to AI API.
@@ -163,31 +165,52 @@ def _shell_quote(s: str) -> str:
 
 # ── File transfer ─────────────────────────────────────
 
+def _normalize_remote_path(remote_path: str) -> str:
+    """Normalize remote path by detecting and fixing MSYS path conversions."""
+    # If the path looks like a Windows path that was converted by MSYS, fix it back
+    if ':' in remote_path and ('Program Files/Git' in remote_path or len(remote_path) > 1 and remote_path[1] == ':'):
+        # Convert C:/Program Files/Git/tmp/file.txt back to /tmp/file.txt
+        # Find the position where Git path starts
+        if 'Program Files/Git' in remote_path:
+            git_pos = remote_path.find('Program Files/Git')
+            if git_pos != -1:
+                # Extract the part after Program Files/Git
+                actual_path = remote_path[git_pos + len('Program Files/Git'):]
+                return actual_path
+        # If it's just a drive letter followed by :, convert it too
+        if len(remote_path) > 3 and remote_path[1] == ':' and remote_path[2] == '/':
+            # This is a Windows-style path like C:/something
+            # Try to determine if it's supposed to be a Unix path
+            potential_unix_path = remote_path[3:]  # Remove drive prefix like "C:"
+            # If the resulting path starts with a common Unix directory, assume it should be Unix path
+            if (potential_unix_path.startswith('/tmp/') or                 potential_unix_path.startswith('/home/') or                 potential_unix_path.startswith('/etc/') or                 potential_unix_path.startswith('/var/') or                 potential_unix_path.startswith('/usr/')):
+                return potential_unix_path
+    return remote_path
+
+
 def upload_file(server: dict, local_path: str, remote_path: str):
+    # Normalize the remote path to handle MSYS conversion issues
+    normalized_remote_path = _normalize_remote_path(remote_path)
     client = get_client(server)
     try:
         sftp = client.open_sftp()
-        sftp.put(local_path, remote_path)
-        sftp.chmod(remote_path, 0o664)
+        sftp.put(local_path, normalized_remote_path)
+        sftp.chmod(normalized_remote_path, 0o664)
         sftp.close()
-        print(f"OK: {local_path} -> {server['alias']}:{remote_path}")
+        print(f"OK: {local_path} -> {server['alias']}:{normalized_remote_path}")
     finally:
         client.close()
-
-
 def download_file(server: dict, remote_path: str, local_path: str):
+    # Normalize the remote path to handle MSYS conversion issues
+    normalized_remote_path = _normalize_remote_path(remote_path)
     client = get_client(server)
     try:
         sftp = client.open_sftp()
-        sftp.get(remote_path, local_path)
+        sftp.get(normalized_remote_path, local_path)
         sftp.close()
-        print(f"OK: {server['alias']}:{remote_path} -> {local_path}")
+        print(f"OK: {server['alias']}:{normalized_remote_path} -> {local_path}")
     finally:
         client.close()
-
-
-# ── Key management ────────────────────────────────────
-
 def install_key(server: dict):
     pub_key_path = SSH_KEY_PATH + ".pub"
     if not os.path.exists(pub_key_path):
@@ -459,4 +482,4 @@ if __name__ == "__main__":
         raise
     except Exception as e:
         print(f"ERROR: {type(e).__name__}: {e}", file=sys.stderr)
-        sys.exit(1)
+        sys.exit(1)