feat: major cleanup + death alerts + idle detection + Discord webhooks

Cleanup:
- Removed 109 stale asset files from static/assets/ (was 122, now 13)
- Removed static/v2/ entirely (was duplicate of root assets)
- Removed dead dashboard code: DashboardView, Layout, GlobalStats,
  CharacterCard, CharacterGrid, VitalBar, TabContainer, CombatTab,
  RaresTab, MapTab, InventoryTab, global.css, MapTransformContext
- Removed recharts dependency (425KB chunk eliminated)
- CSS reduced from 17KB to 10KB
- Added deploy-frontend.sh script for one-command build+deploy
- Updated CLAUDE.md with combat_stats, share_*, dungeon_map events
  and React frontend architecture

Death alerts (frontend + backend):
- Frontend: DeathNotification component with red banner + sawtooth
  sound when vitae goes from 0 to >0
- Backend: detects vitae transition in vitals handler, sends Discord
  webhook to #aclog with "☠️ CHARACTER died! (vitae: X%)"
- Rate-limited: max 1 Discord alert per character per 5 minutes

Idle detection (backend):
- Background task runs every 60 seconds
- Detects: vt_state "default"/"idle" OR kph=0 while in combat/hunt
- Sends Discord webhook: "⚠️ CHARACTER appears idle (state: X, KPH: 0)"
- Auto-clears alert when character becomes active again
- No duplicate alerts for same idle period

Discord integration:
- DISCORD_ACLOG_WEBHOOK env var for webhook URL
- Used by both death alerts and idle detection
- Graceful fallback when not configured

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/tsconfig.tsbuildinfo

@@ -1 +1 @@
-{"root":["./src/app.tsx","./src/dashboardview.tsx","./src/main.tsx","./src/api/client.ts","./src/api/endpoints.ts","./src/components/charactercard.tsx","./src/components/charactergrid.tsx","./src/components/globalstats.tsx","./src/components/layout.tsx","./src/components/vitalbar.tsx","./src/components/effects/rarenotification.tsx","./src/components/map/heatmapcanvas.tsx","./src/components/map/maplayout.tsx","./src/components/map/mapview.tsx","./src/components/map/playerdots.tsx","./src/components/map/portalmarkers.tsx","./src/components/map/sidebar.tsx","./src/components/map/trailssvg.tsx","./src/components/sidebar/playerlist.tsx","./src/components/sidebar/playerrow.tsx","./src/components/sidebar/sidebarwindowbuttons.tsx","./src/components/sidebar/sortbuttons.tsx","./src/components/tabs/combattab.tsx","./src/components/tabs/inventorytab.tsx","./src/components/tabs/maptab.tsx","./src/components/tabs/rarestab.tsx","./src/components/tabs/tabcontainer.tsx","./src/components/windows/characterwindow.tsx","./src/components/windows/chatwindow.tsx","./src/components/windows/combatpickerwindow.tsx","./src/components/windows/combatstatswindow.tsx","./src/components/windows/draggablewindow.tsx","./src/components/windows/inventorywindow.tsx","./src/components/windows/issueswindow.tsx","./src/components/windows/radarwindow.tsx","./src/components/windows/statswindow.tsx","./src/components/windows/vitalsharingwindow.tsx","./src/components/windows/windowrenderer.tsx","./src/contexts/maptransformcontext.tsx","./src/contexts/windowmanagercontext.tsx","./src/hooks/uselivedata.ts","./src/hooks/useplayercolors.ts","./src/hooks/usewebsocket.ts","./src/types/index.ts","./src/utils/coordinates.ts"],"version":"5.8.3"}
+{"root":["./src/app.tsx","./src/main.tsx","./src/api/client.ts","./src/api/endpoints.ts","./src/components/effects/deathnotification.tsx","./src/components/effects/rarenotification.tsx","./src/components/map/heatmapcanvas.tsx","./src/components/map/maplayout.tsx","./src/components/map/mapview.tsx","./src/components/map/playerdots.tsx","./src/components/map/portalmarkers.tsx","./src/components/map/sidebar.tsx","./src/components/map/trailssvg.tsx","./src/components/sidebar/playerlist.tsx","./src/components/sidebar/playerrow.tsx","./src/components/sidebar/sidebarwindowbuttons.tsx","./src/components/sidebar/sortbuttons.tsx","./src/components/windows/characterwindow.tsx","./src/components/windows/chatwindow.tsx","./src/components/windows/combatpickerwindow.tsx","./src/components/windows/combatstatswindow.tsx","./src/components/windows/draggablewindow.tsx","./src/components/windows/inventorywindow.tsx","./src/components/windows/issueswindow.tsx","./src/components/windows/playerdashboardwindow.tsx","./src/components/windows/queststatuswindow.tsx","./src/components/windows/radarwindow.tsx","./src/components/windows/statswindow.tsx","./src/components/windows/vitalsharingwindow.tsx","./src/components/windows/windowrenderer.tsx","./src/contexts/windowmanagercontext.tsx","./src/hooks/uselivedata.ts","./src/hooks/useplayercolors.ts","./src/hooks/usewebsocket.ts","./src/types/index.ts","./src/utils/coordinates.ts"],"version":"5.8.3"}