feat(sheet): Add inventory management controls to WeaponsDisplay (#372) (#394)

Enhance WeaponsDisplay with interactive readiness, wireless, and ammo
controls directly in the weapons view, matching InventoryPanel capabilities.

- Add readiness badge (always visible) with color-coded pill
- Add compact ammo indicator bar in collapsed row
- Replace static wifi icon with state-aware Wifi/WifiOff
- Add readiness button group in expanded view (editable only)
- Add WirelessIndicator toggle in expanded view (editable only)
- Add WeaponAmmoDisplay with reload/unload/swap in expanded view
- Implement optimistic API updates with rollback on error
- Pass onCharacterUpdate and editable props from character page
- Add 22 new tests covering all interactive features (64 total)

Co-authored-by: Claude Opus 4.6 <[email protected]>

Author: Jasrags

app/characters/[id]/page.tsx

@@ -392,6 +392,8 @@ function CharacterSheet({
             <WeaponsDisplay
               character={character}
               onSelect={(pool, label) => openDiceRoller(pool, label)}
+              onCharacterUpdate={(updated) => setCharacter(updated)}
+              editable={character.status === "active"}
             />
 
             {character.armor && character.armor.length > 0 && (