MDView does not render Markdown when file path contains Czech diacritics

[pluskaljan]

MDView TC plugin does not render a Markdown file when the file path contains Czech diacritics.

Version:

• WLX_mdview_TC-plugin_v3.8.1
• Total Commander: 11.03. 64bit
• Windows: Windows 11 Pro 24H2

Steps to reproduce:

1. Put README.md here:
   C:\temp\Česká tisková kancelář\README.md
2. Open it in Total Commander Lister with F3.
3. It is shown as plain raw Markdown text.
4. Pressing key 4 does not switch to rendered MDView output.

Control test:

1. Copy the same README.md to:
   C:\temp\Ceska tiskova kancelar\README.md
2. Open it with F3.
3. It renders correctly.

Expected:
The Markdown file should render in both locations.

Actual:
The same file renders only from the ASCII path. From the path containing Czech characters like "Česká", "tisková", "kancelář", it falls back to plain text.