fix(renderer): prevent empty content from polluting editor cache

[aculich]

Summary

• Prevents MarkdownEditor initialization from polluting the editor cache with empty content
• First file opened after app start now displays correctly instead of appearing blank

Fixes #414

Problem

When the app starts and a markdown file is opened, the file appears blank. Switching to another file and back would show the content correctly. This was caused by the Tiptap editor firing onUpdate('') during initialization, which cached an empty string that was then returned on the cache lookup.

Solution

Two-layer fix:

1. Primary guard in handleEditorChange: Skip caching when markdown content is empty
2. Secondary guard in cache lookup: Explicit cachedContent.length > 0 check as defense in depth

Changes

• apps/x/apps/renderer/src/App.tsx:

  • Added early return in handleEditorChange for empty content
  • Added explicit length check in cache lookup condition

• apps/x/apps/renderer/src/components/markdown-editor.tsx:

  • Minor refactor (no functional change)

Testing

1. Start the app fresh (or restart)
2. Open any markdown file
3. File should display content immediately (previously was blank)
4. Opening additional files should continue to work correctly
5. External file modifications should still be detected correctly

Notes

Issue #414 was previously closed but the problem persisted. This fix addresses the root cause: the editor cache being polluted by empty content during Tiptap initialization.

Made with Cursor

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