Make ced native module optional to prevent Windows startup crash

[Copilot]

Windows app crashes on startup when the ced native module fails to load due to architecture mismatch or build issues.

Changes

• Lazy-load ced module: Convert static import to dynamic import with error handling in encoding.js
• Async guessEncoding: Make function async to support dynamic import, return Promise<Encoding>
• Fallback to UTF-8: When ced fails to load or throws, default to UTF-8 encoding
• Update caller: Add await in markdown.js where guessEncoding is called

Impact

App starts successfully even when ced module is unavailable. Encoding detection still works when the module loads correctly. Users with broken ced builds can now use the app with UTF-8 as default encoding.

// Before: static import, crashes on module load failure
import ced from 'ced'

// After: lazy load with fallback
async function getCed() {
  try {
    const cedModule = await import('ced')
    return cedModule.default
  } catch (error) {
    console.warn('Failed to load ced module, defaulting to UTF-8')
    return null
  }
}

Original prompt

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This section details on the original issue you should resolve

<issue_title>Windows Software Error</issue_title>
<issue_description>Hi sir
Windows software not opening
the following error showing
i attached the error image too
iam using windows 10 x64
pls fix sir
thanks sir

</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Windows Software Error #9

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[peterjthomson]

@cursor review

[claude]

Code review

No issues found. Checked for bugs and CLAUDE.md compliance.