fix: show stage all button when no files are staged

[jschwxrz]

Shows "Stage All" Button also when no file is staged yet

fixes #1047

[vercel]

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[greptile-apps]

Greptile Summary

Removed unnecessary condition requiring staged files to exist before showing the "Stage All" button. Now the button appears whenever there are unstaged files, improving UX by allowing users to stage all files from the initial state.

Confidence Score: 5/5

• Safe to merge - simple conditional logic simplification with no risk
• This is a minimal, focused change that removes an unnecessary condition. The logic is straightforward: the button now appears whenever unstaged files exist, which is the expected UX behavior. No edge cases, no breaking changes.
• No files require special attention

Important Files Changed

Filename	Overview
src/renderer/components/FileChangesPanel.tsx	Simplified condition to show Stage All button whenever unstaged files exist

_{Last reviewed commit: 61365ca}

[arnestrickmann]

@jschwxrz Thanks for opening this PR!