MidnightNameplates Phase 9.3.6 - Larger Live Preview Render

Fixed the actual issue:
- The previous phase enlarged only the preview container.
- This phase magnifies the rendered preview nameplate itself by 1.55x.
- Real in-game nameplate scale is NOT changed.
- Preview container increased to 430x220.
- Preview stage increased to 410x190.
- Main config increased to 1020x760 where supported.
- Health bar, name, cast bar, target marker, auras and indicators all inherit the preview magnification together.

Test:
1. /mnp opens.
2. Live preview nameplate is visibly much larger.
3. Changing General -> Scale still changes the preview proportionally.
4. In-game nameplate scale remains exactly controlled by the normal Scale setting.
5. No Lua errors.
