feat: inline permission prompt and improve TUI layout

- Render permission modal inline below log panel instead of floating CenteredModal overlay
- Hide input area when permission prompt is active
- Add dev:debug and dev:debug-brk scripts for Bun inspector debugging
- Add background color to header to prevent content bleeding through
- Add margin spacing between header and log panel
- Change permission modal border to top-only for cleaner inline appearance

.gitignore

@@ -261,3 +261,4 @@ npm-debug.log*
 # Other
 .vscode-test/
 coverage-final.json
+.codetyper-backup