Self / ally arts cast on the hero when pointed at an enemy

Arts with launch type 2 (buffs, auras, heals) are only valid on allies
or without a target; with an enemy under the cursor the game dropped
the order. Orders of a player hero for such arts lose a non-ally target,
which casts them on the hero. The launch type comes from the art
definition tables (game/engine/arts.h, tools/arttable.mjs).

Also: skill keys check the relocated taskbar slots (all 7), Ghidra
data labels (g_ names in names.txt).

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

src/mods/skillkeys.cpp

@@ -11,6 +11,8 @@
 
 #include "mods/skillkeys.h"
 
+#include "mods/skillbar.h"
+
 #include <cstdint>
 #include <mutex>
 
@@ -21,11 +23,6 @@
 namespace mods::skillkeys {
 namespace {
 
-// cUI_Taskbar2 fields.
-constexpr size_t kTaskbarSlotCount = 0x15c;  // uint16: combat-art slots the hero has
-constexpr size_t kTaskbarSkillSlots = 0x178;  // 5 slot controls (null: none)
-constexpr unsigned kSlots = 5;
-
 // The game window, if it has the focus (it does while a skill key is used).
 HWND GameWindow() {
     HWND window = GetForegroundWindow();
@@ -84,9 +81,7 @@ void OnSlotSelected(void* taskbar, unsigned slot) {
     }
     const int key = g_state.pendingKey;
     g_state.pendingKey = 0;
-    const auto* bar = static_cast<const uint8_t*>(taskbar);
-    if (slot >= kSlots || slot >= *reinterpret_cast<const uint16_t*>(bar + kTaskbarSlotCount) ||
-        !reinterpret_cast<void* const*>(bar + kTaskbarSkillSlots)[slot]) {
+    if (!mods::skillbar::HasSkillSlot(taskbar, slot)) {
         return;  // empty slot: nothing was selected
     }
     HWND window = GameWindow();
@@ -118,3 +113,4 @@ void __fastcall UiTaskbar_SelectSkillSlot(void* self, void* edx, unsigned slot,
 }
 
 } // namespace game
+