feat(animation): 452 named constants, 30-phase character animation state machine

Add animation_ids.hpp/cpp with all 452 WoW animation ID constants (anim::STAND,
anim::RUN, anim::FIRE_BOW, ... anim::FLY_BACKWARDS, etc.), nameFromId() O(1)
lookup, and flyVariant() compact 218-element ground→FLY_* resolver.

Expand AnimationController into a full state machine with 20+ named states:
spell cast (directed→omni→cast fallback chain, instant one-shot release),
hit reactions (WOUND/CRIT/DODGE/BLOCK/SHIELD_BLOCK), stun, wounded idle,
stealth animation substitution, loot, fishing channel, sit/sleep/kneel
down→loop→up transitions, sheathe/unsheathe combat enter/exit, ranged weapons
(BOW/GUN/CROSSBOW/THROWN with reload states), game object OPEN/CLOSE/DESTROY,
vehicle enter/exit, mount flight directionals (FLY_LEFT/RIGHT/UP/DOWN/BACKWARDS),
emote state variants, off-hand/pierce/dual-wield alternation, NPC
birth/spawn/drown/rise, sprint aura override, totem idle, NPC greeting/farewell.

Add spell_defines.hpp with SpellEffect (~45 constants) and SpellMissInfo
(12 constants) namespaces; replace all magic numbers in spell_handler.cpp.

Add GAMEOBJECT_BYTES_1 to update field table (all 4 expansion JSONs) and wire
GameObjectStateCallback. Add DBC cross-validation on world entry.

Expand tools/_ANIM_NAMES from ~35 to 452 entries in m2_viewer.py and
asset_pipeline_gui.py. Add tests/test_animation_ids.cpp.

Bug fixes included:
- Stand state 1 was animating READY_2H(27) — fixed to SITTING(97)
- Spell casts ended freeze-frame — add one-shot release animation
- NPC 2H swing probe chain missing ATTACK_2H_LOOSE (polearm/staff)
- Chair sits (states 2/4/5/6) incorrectly played floor-sit transition
- STOP(3) used for all spell casts — replaced with model-aware chain

include/game/game_handler.hpp

@@ -934,7 +934,8 @@ public:
     void setGhostStateCallback(GhostStateCallback cb) { ghostStateCallback_ = std::move(cb); }
 
     // Melee swing callback (for driving animation/SFX)
-    using MeleeSwingCallback = std::function<void()>;
+    // spellId: 0 = regular auto-attack swing, non-zero = melee ability (special attack)
+    using MeleeSwingCallback = std::function<void(uint32_t spellId)>;
     void setMeleeSwingCallback(MeleeSwingCallback cb) { meleeSwingCallback_ = std::move(cb); }
 
     // Spell cast animation callbacks — true=start cast/channel, false=finish/cancel
@@ -959,6 +960,23 @@ public:
     using NpcSwingCallback = std::function<void(uint64_t guid)>;
     void setNpcSwingCallback(NpcSwingCallback cb) { npcSwingCallback_ = std::move(cb); }
 
+    // Hit reaction callback — triggers victim animation (dodge, block, wound, crit wound)
+    enum class HitReaction : uint8_t { WOUND, CRIT_WOUND, DODGE, PARRY, BLOCK, SHIELD_BLOCK };
+    using HitReactionCallback = std::function<void(uint64_t victimGuid, HitReaction reaction)>;
+    void setHitReactionCallback(HitReactionCallback cb) { hitReactionCallback_ = std::move(cb); }
+
+    // Stun state callback — fires when UNIT_FLAG_STUNNED changes on the local player
+    using StunStateCallback = std::function<void(bool stunned)>;
+    void setStunStateCallback(StunStateCallback cb) { stunStateCallback_ = std::move(cb); }
+
+    // Stealth state callback — fires when UNIT_FLAG_SNEAKING changes on the local player
+    using StealthStateCallback = std::function<void(bool stealthed)>;
+    void setStealthStateCallback(StealthStateCallback cb) { stealthStateCallback_ = std::move(cb); }
+
+    // Player health changed callback — fires when local player HP changes
+    using PlayerHealthCallback = std::function<void(uint32_t health, uint32_t maxHealth)>;
+    void setPlayerHealthCallback(PlayerHealthCallback cb) { playerHealthCallback_ = std::move(cb); }
+
     // NPC greeting callback (plays voice line when NPC is clicked)
     using NpcGreetingCallback = std::function<void(uint64_t guid, const glm::vec3& position)>;
     void setNpcGreetingCallback(NpcGreetingCallback cb) { npcGreetingCallback_ = std::move(cb); }
@@ -1093,6 +1111,19 @@ public:
     using GameObjectCustomAnimCallback = std::function<void(uint64_t guid, uint32_t animId)>;
     void setGameObjectCustomAnimCallback(GameObjectCustomAnimCallback cb) { gameObjectCustomAnimCallback_ = std::move(cb); }
 
+    // GameObject state change callback (triggered when GAMEOBJECT_BYTES_1 updates — state byte changes)
+    // goState: 0=READY(closed), 1=OPEN, 2=DESTROYED
+    using GameObjectStateCallback = std::function<void(uint64_t guid, uint8_t goState)>;
+    void setGameObjectStateCallback(GameObjectStateCallback cb) { gameObjectStateCallback_ = std::move(cb); }
+
+    // Sprint aura callback — fired when sprint-type aura active state changes on player
+    using SprintAuraCallback = std::function<void(bool active)>;
+    void setSprintAuraCallback(SprintAuraCallback cb) { sprintAuraCallback_ = std::move(cb); }
+
+    // Vehicle state callback — fired when player enters/exits a vehicle
+    using VehicleStateCallback = std::function<void(bool entered, uint32_t vehicleId)>;
+    void setVehicleStateCallback(VehicleStateCallback cb) { vehicleStateCallback_ = std::move(cb); }
+
     // Faction hostility map (populated from FactionTemplate.dbc by Application)
     void setFactionHostileMap(std::unordered_map<uint32_t, bool> map) { factionHostileMap_ = std::move(map); }
 
@@ -1806,6 +1837,10 @@ public:
     using ItemLootCallback = std::function<void(uint32_t itemId, uint32_t count, uint32_t quality, const std::string& name)>;
     void setItemLootCallback(ItemLootCallback cb) { itemLootCallback_ = std::move(cb); }
 
+    // Loot window open/close callback (for loot kneel animation)
+    using LootWindowCallback = std::function<void(bool open)>;
+    void setLootWindowCallback(LootWindowCallback cb) { lootWindowCallback_ = std::move(cb); }
+
     // Quest turn-in completion callback
     using QuestCompleteCallback = std::function<void(uint32_t questId, const std::string& questTitle)>;
     void setQuestCompleteCallback(QuestCompleteCallback cb) { questCompleteCallback_ = std::move(cb); }
@@ -2532,6 +2567,9 @@ private:
     GameObjectMoveCallback gameObjectMoveCallback_;
     GameObjectDespawnCallback gameObjectDespawnCallback_;
     GameObjectCustomAnimCallback gameObjectCustomAnimCallback_;
+    GameObjectStateCallback gameObjectStateCallback_;
+    SprintAuraCallback sprintAuraCallback_;
+    VehicleStateCallback vehicleStateCallback_;
 
     // Transport tracking
     struct TransportAttachment {
@@ -3111,6 +3149,10 @@ private:
     UnitAnimHintCallback unitAnimHintCallback_;
     UnitMoveFlagsCallback unitMoveFlagsCallback_;
     NpcSwingCallback npcSwingCallback_;
+    HitReactionCallback hitReactionCallback_;
+    StunStateCallback stunStateCallback_;
+    StealthStateCallback stealthStateCallback_;
+    PlayerHealthCallback playerHealthCallback_;
     NpcGreetingCallback npcGreetingCallback_;
     NpcFarewellCallback npcFarewellCallback_;
     NpcVendorCallback npcVendorCallback_;
@@ -3210,6 +3252,9 @@ private:
     // ---- Item loot callback ----
     ItemLootCallback itemLootCallback_;
 
+    // ---- Loot window callback ----
+    LootWindowCallback lootWindowCallback_;
+
     // ---- Quest completion callback ----
     QuestCompleteCallback questCompleteCallback_;