Anti-cheat off, weapon sets 6-7 in hero files

- The game's cheater detection killed the hero ("Hase!") whenever its
  protected stat mirror was stale; the mirror is now refreshed from the hero
  whenever it is unlocked, stream checks never punish, loadHero no longer
  sets the cheater flag (docs/anticheat.md).
- saveHero wrote the items of weapon sets 1-5 only: its loop runs over all 7
  sets, so sets 6-7 survive a world loading the hero from the hero file.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/skill-slots.md

@@ -189,3 +189,13 @@ only (or disabled in multiplayer).
    table for the extra controls), layout, rendering, hit tests, drag & drop.
 6. Keys: 0-6 cast art slots (since 2026-10-15; before: 1-7 select and
    cast), F1-F7 select weapon sets.
+
+### Hero files: items of sets 6-7 (2026-10-25)
+
+Reported: the Gladiator lost the weapons of sets 6/7 on Silber. saveHero
+collects the items it writes (chunk 0xc2) from the weapon sets with
+`GetWeaponSetItem` over sets 0..4 (`cmp esi, 5` at `0x605046`), so sets 6-7
+kept ids of items that were never in the hero file; a world that takes its
+hero from the hero file (Silber without its own hero inventory) had nothing
+there. The loop bound is patched to 7 (inventory_save.cpp); loadHero's id
+replacement already covers the shadow slots. Confirmed 2026-10-25.