Add game mode categories, character creation, on-foot ship/hub mode, RAM currency, and in-ship navigation

Bundles several sessions' worth of previously uncommitted work: map
categories with Domination/Conquest/King of the Hill mode stubs and a
server-list mode filter; a procedurally-drawn character-creation screen
replacing the old callsign-only PROFILE overlay; the on-foot groundwork
(walkable station hub, ship interior, character controller) plus the RAM
currency backend; and today's addition, an in-ship Helldivers-2-style
navigation table that QUICK PLAY's queue/connect flow and the Belters/
Military hub travel now live behind, with hub-and-ship return paths and a
context-aware pause menu usable both in-match and inside the ship.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

matchmaking-api/app/routers/matches.py

@@ -3,6 +3,7 @@ from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
 
 from app import crud
+from app.config import settings
 from app.database import get_db
 from app.models import GameServer, Match, MatchPlayer
 from app.schemas import MatchReportRequest
@@ -48,6 +49,11 @@ async def report_match(req: MatchReportRequest, db: AsyncSession = Depends(get_d
         player.kills += result.kills
         player.deaths += result.deaths
         player.hours_played += result.seconds_played / 3600.0
+        player.ram_kb += (
+            settings.ram_payout_participation_kb
+            + result.kills * settings.ram_payout_per_kill_kb
+            + (settings.ram_payout_win_bonus_kb if result.is_winner else 0)
+        )
         if result.is_winner:
             player.wins += 1
         elif req.winner_team is not None: