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>

CMakeLists.txt

@@ -40,6 +40,7 @@ add_library(sacred_re SHARED
     src/mods/skillslots.cpp
     src/mods/inventory_save.cpp
     src/mods/skillbar.cpp
+    src/mods/arttarget.cpp
 )
 target_include_directories(sacred_re PRIVATE src)
 target_compile_options(sacred_re PRIVATE ${SACRED_RE_CXX_FLAGS})