v2.2.2 — Security Health Dial Readability

Fixed

• Security health dial text too small — increased grade letter (28→36px), Security label (10→14px), severity counts (12→16px), severity labels (10→13px), and dot size (r=3→4)
• Gauge not vertically centered — recentered arc gauge assembly at strip midpoint (cy=56, r=42)
• Background arc invisible — changed track color from #111 to #2a2d33 so partial score fills show a visible gauge track