Skills, auto-attack, aura and chain lightning rework, Esc, cache fix

- Skill bar: no art selection; slot 0 is the right-click art, keys 0-6 cast
  slots directly; cooldown labels in exact seconds; slot 0 set apart.
- Arts regenerate on their own (casting no longer refills the group).
- Auto-attack after targeting or casting at a hostile creature, at the speed
  of a held button.
- Auras can be recast while active (renew, no second visual).
- Blicke wie Klingen hits every enemy in range, physical, with life leech.
- Blitzschlag steers the game's own chain: 3 + level/5 hits, 1 + level/10
  chains, re-hits a lone enemy.
- Weapon sets: click selects, drag only from the selected set; the leftmost
  set is clickable (signed hit tests).
- Esc closes open windows before opening the game menu.
- HUD: standalone buttons and texts are centred.
- Record cache sized for widened views (town lag while walking).
- Shared game code: orders, fx events, text drawing, cooldowns, effects.

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

src/mods/input.cpp

@@ -5,9 +5,9 @@
 // several event receivers (engine 0x618130, UI manager 0x757120, taskbar
 // 0x6e1970). This mod reads the raw key messages instead (virtual keys,
 // independent of the keyboard layout): a bound key's messages are swallowed
-// and its action runs. Slot keys call the taskbar's selection directly
-// (src/mods/skillbar.cpp); keys standing in for an original hotkey post that
-// hotkey's key event to the game's event kernel, the way the window
+// and its action runs. Skill keys cast their slot (src/mods/skillkeys.cpp),
+// weapon set keys select it on the taskbar; keys standing in for an original
+// hotkey post that hotkey's key event to the game's event kernel, the way the window
 // procedure does (the kernel dispatches it right away, on the window thread).
 //
 // While a text field has the keyboard, or Ctrl / Alt is held, keys pass
@@ -15,7 +15,7 @@
 //
 // sacred_re.ini (key names: A-Z, 0-9, F1-F24, Space, None):
 //   [keys]
-//   SkillSlot1=1 ... SkillSlot7=7   ; select and cast combat-art slot
+//   SkillSlot0=0 ... SkillSlot6=6   ; cast combat-art slot (0 = right mouse button art)
 //   WeaponSet1=F1 ... WeaponSet7=F7 ; select weapon set
 //   ActionSlot3=G                   ; what W did (W is movement)
 //   PickUp=V                        ; what A did (pick up items nearby)
@@ -85,13 +85,13 @@ struct Binding {
 };
 
 Binding g_bindings[] = {
-    {"SkillSlot1", "1", Kind::SkillSlot, 0, 0},
-    {"SkillSlot2", "2", Kind::SkillSlot, 1, 0},
-    {"SkillSlot3", "3", Kind::SkillSlot, 2, 0},
-    {"SkillSlot4", "4", Kind::SkillSlot, 3, 0},
-    {"SkillSlot5", "5", Kind::SkillSlot, 4, 0},
-    {"SkillSlot6", "6", Kind::SkillSlot, 5, 0},
-    {"SkillSlot7", "7", Kind::SkillSlot, 6, 0},
+    {"SkillSlot0", "0", Kind::SkillSlot, 0, 0},
+    {"SkillSlot1", "1", Kind::SkillSlot, 1, 0},
+    {"SkillSlot2", "2", Kind::SkillSlot, 2, 0},
+    {"SkillSlot3", "3", Kind::SkillSlot, 3, 0},
+    {"SkillSlot4", "4", Kind::SkillSlot, 4, 0},
+    {"SkillSlot5", "5", Kind::SkillSlot, 5, 0},
+    {"SkillSlot6", "6", Kind::SkillSlot, 6, 0},
     {"WeaponSet1", "F1", Kind::WeaponSet, 0, 0},
     {"WeaponSet2", "F2", Kind::WeaponSet, 1, 0},
     {"WeaponSet3", "F3", Kind::WeaponSet, 2, 0},
@@ -149,8 +149,7 @@ void Press(const Binding& binding, int vk) {
     const auto slot = static_cast<unsigned>(binding.index);
     switch (binding.kind) {
     case Kind::SkillSlot:
-        mods::skillkeys::CastOnSelect(slot, vk);
-        mods::skillbar::SelectSkillSlot(slot);
+        mods::skillkeys::KeyPressed(slot, vk);
         break;
     case Kind::WeaponSet:
         mods::skillbar::SelectWeaponSet(slot);