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

src/rendering/celestial.cpp

@@ -84,7 +84,7 @@ bool Celestial::initialize(VkContext* ctx, VkDescriptorSetLayout perFrameLayout)
         .setVertexInput({binding}, {posAttr, uvAttr})
         .setTopology(VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST)
         .setRasterization(VK_POLYGON_MODE_FILL, VK_CULL_MODE_NONE)
-        .setDepthTest(true, false, VK_COMPARE_OP_LESS_OR_EQUAL) // test on, write off (sky layer)
+        .setNoDepthTest() // Sky layer: celestials always render (skybox doesn't write depth)
         .setColorBlendAttachment(PipelineBuilder::blendAdditive())
         .setMultisample(vkCtx_->getMsaaSamples())
         .setLayout(pipelineLayout_)
@@ -411,6 +411,12 @@ float Celestial::calculateCelestialAngle(float timeOfDay, float riseTime, float
 
 void Celestial::update(float deltaTime) {
     sunHazeTimer_ += deltaTime;
+    // Keep timer in a range where GPU sin() precision is reliable (< ~10000).
+    // The noise period repeats at multiples of 1.0 on each axis, so fmod by a
+    // large integer preserves visual continuity.
+    if (sunHazeTimer_ > 10000.0f) {
+        sunHazeTimer_ = std::fmod(sunHazeTimer_, 10000.0f);
+    }
 
     if (!moonPhaseCycling_) {
         return;