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/terrain_renderer.cpp

@@ -193,7 +193,7 @@ bool TerrainRenderer::initialize(VkContext* ctx, VkDescriptorSetLayout perFrameL
         envSizeMBOrDefault("WOWEE_TERRAIN_TEX_CACHE_MB", 4096) * 1024ull * 1024ull;
     LOG_INFO("Terrain texture cache budget: ", textureCacheBudgetBytes_ / (1024 * 1024), " MB");
 
-    // Phase 2.2: Allocate mega vertex/index buffers and indirect draw buffer.
+    // Allocate mega vertex/index buffers and indirect draw buffer.
     // All terrain chunks share these buffers, eliminating per-chunk VB/IB rebinds.
     {
         VmaAllocator allocator = vkCtx->getAllocator();
@@ -375,7 +375,7 @@ void TerrainRenderer::shutdown() {
     if (shadowParamsLayout_) { vkDestroyDescriptorSetLayout(device, shadowParamsLayout_, nullptr); shadowParamsLayout_ = VK_NULL_HANDLE; }
     if (shadowParamsUBO_) { vmaDestroyBuffer(allocator, shadowParamsUBO_, shadowParamsAlloc_); shadowParamsUBO_ = VK_NULL_HANDLE; shadowParamsAlloc_ = VK_NULL_HANDLE; }
 
-    // Phase 2.2: Destroy mega buffers and indirect draw buffer
+    // Destroy mega buffers and indirect draw buffer
     if (megaVB_) { vmaDestroyBuffer(allocator, megaVB_, megaVBAlloc_); megaVB_ = VK_NULL_HANDLE; megaVBAlloc_ = VK_NULL_HANDLE; megaVBMapped_ = nullptr; }
     if (megaIB_) { vmaDestroyBuffer(allocator, megaIB_, megaIBAlloc_); megaIB_ = VK_NULL_HANDLE; megaIBAlloc_ = VK_NULL_HANDLE; megaIBMapped_ = nullptr; }
     if (indirectBuffer_) { vmaDestroyBuffer(allocator, indirectBuffer_, indirectAlloc_); indirectBuffer_ = VK_NULL_HANDLE; indirectAlloc_ = VK_NULL_HANDLE; indirectMapped_ = nullptr; }
@@ -622,7 +622,7 @@ TerrainChunkGPU TerrainRenderer::uploadChunk(const pipeline::ChunkMesh& chunk) {
     gpuChunk.indexBuffer = ib.buffer;
     gpuChunk.indexAlloc = ib.allocation;
 
-    // Phase 2.2: Also copy into mega buffers for indirect drawing
+    // Also copy into mega buffers for indirect drawing
     uint32_t vertCount = static_cast<uint32_t>(chunk.vertices.size());
     uint32_t idxCount = static_cast<uint32_t>(chunk.indices.size());
     if (megaVBMapped_ && megaIBMapped_ &&
@@ -880,7 +880,7 @@ void TerrainRenderer::render(VkCommandBuffer cmd, VkDescriptorSet perFrameSet, c
     renderedChunks = 0;
     culledChunks = 0;
 
-    // Phase 2.2: Use mega VB + IB when available.
+    // Use mega VB + IB when available.
     // Bind mega buffers once, then use direct draws with base vertex/index offsets.
     const bool useMegaBuffers = (megaVB_ && megaIB_);
     if (useMegaBuffers) {
@@ -1092,7 +1092,7 @@ void TerrainRenderer::renderShadow(VkCommandBuffer cmd, const glm::mat4& lightSp
     vkCmdPushConstants(cmd, shadowPipelineLayout_, VK_SHADER_STAGE_VERTEX_BIT,
                        0, 128, &push);
 
-    // Phase 2.2: Bind mega buffers once for shadow pass (same as opaque)
+    // Bind mega buffers once for shadow pass (same as opaque)
     const bool useMegaShadow = (megaVB_ && megaIB_);
     if (useMegaShadow) {
         VkDeviceSize megaOffset = 0;