[Feature] Game mode breakdown — BR, Resurgence, Ranked tabs

[grovecj]

Summary

Show per-mode stat breakdowns so players can see how they perform in each Warzone game mode.

Details

Game Modes

• Battle Royale: Solos, Duos, Trios, Quads
• Resurgence: Solos, Duos, Trios, Quads
• Ranked Play: BR Ranked, Resurgence Ranked (includes SR/division)
• Plunder (if data available)

UI Design

• Tab bar or segmented control at the top of the stats section
• Each tab shows the same stat layout (reuse StatsGrid and chart components) filtered to that mode
• Mode summary cards: Show top-level stats per mode in a horizontal scrollable row:

  [BR: 1.3 K/D, 45 Wins] [Resurgence: 1.8 K/D, 120 Wins] [Ranked: Gold II, 1.1 K/D]
  

• Clicking a mode card switches to the detailed tab

Ranked-Specific Data

• Skill Rating (SR) display with division badge icon
• Division: Bronze, Silver, Gold, Platinum, Diamond, Crimson, Iridescent, Top 250
• SR history chart (if historical snapshots available)

Backend

• GET /api/v1/players/{platform}/{gamertag}/stats?mode=br
• GET /api/v1/players/{platform}/{gamertag}/stats?mode=resurgence
• GET /api/v1/players/{platform}/{gamertag}/stats?mode=ranked
• Each returns the same stat structure filtered to that mode

Acceptance Criteria

• Tab navigation between game modes works
• Stats display correctly per mode
• Mode summary cards show at-a-glance stats
• Ranked mode shows SR and division info
• Graceful handling when a mode has no data