feat(rendering): implement spell visual effects with bone-tracked ribbons and particles

Add complete spell visual pipeline resolving the DBC chain
(Spell → SpellVisual → SpellVisualKit → SpellVisualEffectName → M2)
with precast/cast/impact phases, bone-attached positioning, and
automatic dual-hand mirroring.

Ribbon rendering fixes:
- Parse visibility track as uint8 (was read as float, suppressing
  all ribbon edges due to ~1.4e-45 failing the >0.5 check)
- Filter garbage emitters with bone=UINT_MAX unconditionally
- Guard against NaN spine positions from corrupt bone data
- Resolve ribbon textures via direct index, not textureLookup table
- Fall back to bone 0 when ribbon bone index is out of range

Particle rendering fixes:
- Reduce spell particle scale from 5x to 1.5x (was oversized)
- Exempt spell effect instances from position-based deduplication

Spell handler integration:
- Trigger precast visuals on SMSG_SPELL_START with server castTimeMs
- Trigger cast/impact visuals on SMSG_SPELL_GO
- Cancel precast visuals on cast interrupt/failure/movement

M2 classifier expansion:
- Add AmbientEmitterType enum for sound system integration
- Add 20+ foliage tokens, 4 spell effect tokens, isSmallFoliage flag
- Add markModelAsSpellEffect() to override disableAnimation

DBC layouts:
- Add SpellVisualID field to Spell.dbc for all expansion configs

Signed-off-by: Pavel Okhlopkov <pavel.okhlopkov@flant.com>

include/rendering/m2_renderer.hpp

@@ -2,6 +2,7 @@
 
 #include "pipeline/m2_loader.hpp"
 #include "pipeline/blp_loader.hpp"
+#include "rendering/m2_model_classifier.hpp"
 #include <vulkan/vulkan.h>
 #include <vk_mem_alloc.h>
 #include <glm/glm.hpp>
@@ -78,11 +79,15 @@ struct M2ModelGPU {
     bool collisionTreeTrunk = false;
     bool collisionNoBlock = false;
     bool collisionStatue = false;
-    bool isSmallFoliage = false;  // Small foliage (bushes, grass, plants) - skip during taxi
-    bool isInvisibleTrap = false; // Invisible trap objects (don't render, no collision)
-    bool isGroundDetail = false;  // Ground clutter/detail doodads (special fallback render path)
+    bool isSmallFoliage = false;    // Small foliage (bushes, grass, plants) - skip during taxi
+    bool isInvisibleTrap = false;   // Invisible trap objects (don't render, no collision)
+    bool isGroundDetail = false;    // Ground clutter/detail doodads (special fallback render path)
     bool isWaterVegetation = false; // Cattails, reeds, kelp etc. near water (insect spawning)
     bool isFireflyEffect = false;   // Firefly/fireflies M2 (exempt from particle dampeners)
+    bool isWaterfall = false;       // Waterfall model (ambient sound + splash particles)
+    bool isBrazierOrFire = false;   // Brazier / campfire / bonfire model
+    bool isTorch = false;           // Wall-mounted or standing torch
+    AmbientEmitterType ambientEmitterType = AmbientEmitterType::None;
 
     // Collision mesh with spatial grid (from M2 bounding geometry)
     struct CollisionMesh {
@@ -282,6 +287,8 @@ public:
 
     bool hasModel(uint32_t modelId) const;
     bool loadModel(const pipeline::M2Model& model, uint32_t modelId);
+    /** Mark a loaded model as a spell effect (full-brightness particles, no collision). */
+    void markModelAsSpellEffect(uint32_t modelId);
 
     uint32_t createInstance(uint32_t modelId, const glm::vec3& position,
                             const glm::vec3& rotation = glm::vec3(0.0f),