chore: Fix compiler warnings throughout project

[jnyecode]

• used _ prefix on unused variables
• add #[allow(dead_code)] for unused functions (kept in case needed later)
• change drops for let _ = (dropping a reference does nothing)
• update .gitignore to not include .claude/ dir

Chose to keep unused code since I'm new to the project...

[Marenz]

Probably an oversight?

You added it in the first comit and deleted the .claude dir/file in the second commit, it would be cleaner to not add it in the first place :)

[jnyecode]

Yeah apologies... Accidentally included the claude settings so second commit fixed the mistake, not intentional 🙏

[Marenz]

No worries! Since both commits have their own real changes, you just need to remove the .claude files from the first commit. Easiest way:

git rebase -i HEAD~2

Mark the first commit as edit, then when it stops:

git reset HEAD .claude
git commit --amend --no-edit
git rebase --continue

This unstages the .claude files from commit 1 without deleting them from your disk. The second commit will rebase cleanly — the .claude removal just becomes a no-op while the .gitignore change stays. Then git push --force-with-lease.