feat(profile): Implement preference-based filtering

[arunderwood]

Summary

Use user preferences to personalize the dashboard experience by boosting relevant activities in the priority calculation.

Parent Epic

Part of #309 (User Profiles & Personalization)

Dependencies

• Depends on: Preferences UI issue

Deliverables

Priority Calculation Updates

• Update usePriorityCalculation.ts to accept user preferences
• Implement preference-based scoring boosts:

  // Boost for matching preferred bands
  if (userPreferences.preferredBands?.includes(activity.band)) {
    score += PREFERRED_BAND_BOOST; // e.g., +15 points
  }
  
  // Boost for matching preferred modes
  if (userPreferences.preferredModes?.includes(activity.mode)) {
    score += PREFERRED_MODE_BOOST; // e.g., +10 points
  }

Band Activity Highlighting

• Highlight preferred bands in band activity card
• Visual indicator (border, badge, or glow) for preferred bands

Contest Filtering

• Filter or boost contests matching preferred modes
• Show mode relevance indicator on contest cards

Grid-Based Features (Foundation)

• Add grid square to DashboardData context
• Prepare for future satellite pass filtering (grid-based visibility)
• Prepare for future propagation predictions (grid-based paths)

Testing

• Unit tests for preference-based scoring in usePriorityCalculation.test.ts
• Tests for boost calculations
• Tests for filtering logic

Scoring Adjustments

Preference Match	Score Boost
Preferred band	+15
Preferred mode	+10
Both band and mode	+25 (cumulative)
User's grid relevant (future)	+20

Acceptance Criteria

• Dashboard prioritizes activities matching user preferences
• Preferred bands visually highlighted in band activity
• Contests filtered/boosted by preferred modes
• Scoring changes are testable and configurable
• Performance not degraded (preference lookup is O(1))