lazygit .gitignore editing discovery (sanitized)

Discovery snapshot: user found that lazygit offered no way to open .gitignore from the Files panel. Investigation showed:

Files panel = changed files only; .gitignore was committed and untouched, hence absent.
e requires a selected listed file; nothing to select.
Relevant lazygit source refs: pkg/commands/git_commands.(*FileCommands).GetOpenDirInEditorCmdStr, OSCommand.OpenFile, error CommandDoesNotSupportOpeningInEditor.
Correct approach: edit .gitignore from a shell (Shell>shell pane or t → nvim in Project>project, which starts in /home/sam/TEST-BETA), or sed -i to strip lines.
Keyboard/general mapping: ignore a file via lazygit i on the file; un-ignore only by editing .gitignore; files unchanged in git are not listed in lazygit.
Workspace /home/sam/TEST-BETA; ignore entries of interest: /TEST1.md, /TEST2.md, /folder-0; .paperclip intentionally ignored.

Evidence

Confidence: 85%
Reason: Rich, sanitized snapshot consolidating troubleshooting and conventions useful to future agents.