4. Remove White Outlines From Party Page Blue Orbs

The Party timeline blue orbs should no longer sit inside white circular outlines.

Current likely target:

• .partyDot:after currently draws the white circular outline and hover/focus halo.

Implementation notes:

• Remove the normal and hover white ring treatment from the Party dots.
• Preserve an accessible focus indication, but use a subtler treatment than a white circular outline. Acceptable alternatives include scale, opacity, underline/line response, brightness, or a small non-ring focus mark.
• Do not reintroduce halos/glows that conflict with the current white-slate/garden direction.

Acceptance criteria:

• No white circular outline surrounds Party timeline blue orbs in normal, hover, or focus-visible states.
• Keyboard users still have a visible focus state.
• The Party timeline still communicates sequence through layout and line behavior.