[Feature] Squad dashboard UI — aggregate stats and member list

[grovecj]

Summary

Build the squad dashboard view showing collective stats, individual member breakdowns, and squad management.

Details

Squad Dashboard Layout

┌─────────────────────────────────────────────┐
│  Squad Name: "The Boys"          [Edit] [⚙] │
├─────────────────────────────────────────────┤
│  AGGREGATE STATS                             │
│  [Total Kills: 45k] [Total Wins: 890]       │
│  [Avg K/D: 1.35]    [Total Time: 120d]      │
├─────────────────────────────────────────────┤
│  SQUAD RECORDS                               │
│  🏆 Most Kills: player2 (18,000)            │
│  🏆 Best K/D: player1 (1.8)                 │
│  🏆 Most Wins: player3 (400)                │
├─────────────────────────────────────────────┤
│  MEMBERS                                     │
│  ┌──────┐ ┌──────┐ ┌──────┐ ┌──────┐       │
│  │ P1   │ │ P2   │ │ P3   │ │ P4   │       │
│  │1.8KD │ │1.5KD │ │1.2KD │ │0.9KD │       │
│  └──────┘ └──────┘ └──────┘ └──────┘       │
├─────────────────────────────────────────────┤
│  CHARTS                                      │
│  [Overlaid Radar] [Kill Distribution Bar]    │
└─────────────────────────────────────────────┘

Components

SquadDashboard/
├── SquadHeader.vue          // Name, edit, settings
├── SquadAggregateStats.vue  // Collective stats cards
├── SquadRecords.vue         // Top performer per stat
├── SquadMemberCards.vue     // Member cards with mini stats
├── SquadCharts.vue          // Overlaid radar + bar charts
└── SquadManage.vue          // Add/remove members modal

Squad Management

• Add member: Search modal (reuse player search component)
• Remove member: Confirm dialog before removal
• Edit squad name: Inline editable text
• Delete squad: Confirmation dialog with squad name typed to confirm

Charts

• Overlaid radar chart: All members on one chart (reuse from comparison, [Feature] Compare mode — side-by-side player stat comparison #14)
• Kills contribution bar: Stacked bar showing each member's % of total kills
• K/D comparison: Horizontal bar chart ranking members by K/D

Navigation

• Squad list page at /squads showing all saved squads as cards
• Each card shows squad name, member count, avg K/D
• Click card → /squad/:id dashboard

Acceptance Criteria

• Squad dashboard displays aggregate and individual stats
• Squad records highlight top performers
• Member cards link to individual player pages
• Charts render with all member data overlaid
• Squad management (add/remove/edit/delete) works
• Squad list page shows all squads