[FIX] Remove all padding/margin from token-meter sidebar boxes

[four-bytes-robby]

Goal

Remove all padding and margin from every box in the token-meter sidebar so the layout is bare boxes with no spacing.

Context

Local inspection of src/tui.tsx (commit c68d456) shows only one <box flexDirection="column"> wrapper with no padding/margin props. The visible padding comes from the <TokenMeter> component in @four-bytes/opencode-plugin-lib/tui-components (external dependency), not from this file.

Blocked

Cannot proceed from src/tui.tsx alone — the padding lives in the shared component. Need decision on:

• Option A: edit TokenMeter.tsx in @four-bytes/opencode-plugin-lib (affects all consumers)
• Option B: pass padding={0} / margin={0} props through <TokenMeter tokens softLimit colors />
• Option C: wrap the meter in local overrides here

Wave Ref

• wave_ref: P5