Fix taxi state sync and transport authority; reduce runtime log overhead; restore first-person self-hide

include/rendering/camera_controller.hpp

@@ -64,6 +64,7 @@ public:
     float getPitch() const { return pitch; }
     float getFacingYaw() const { return facingYaw; }
     bool isThirdPerson() const { return thirdPerson; }
+    bool isFirstPersonView() const { return thirdPerson && (userTargetDistance <= MIN_DISTANCE + 0.15f); }
     bool isGrounded() const { return grounded; }
     bool isJumping() const { return !grounded && verticalVelocity > 0.0f; }
     bool isFalling() const { return !grounded && verticalVelocity <= 0.0f; }

include/rendering/m2_renderer.hpp

@@ -264,6 +264,10 @@ public:
      * @param instanceId Instance ID returned by createInstance()
      */
     void removeInstance(uint32_t instanceId);
+    /**
+     * Remove multiple instances with one spatial-index rebuild.
+     */
+    void removeInstances(const std::vector<uint32_t>& instanceIds);
 
     /**
      * Clear all models and instances

include/rendering/renderer.hpp

@@ -243,6 +243,7 @@ private:
     std::string currentZoneName;
     bool inTavern_ = false;
     bool inBlacksmith_ = false;
+    float musicSwitchCooldown_ = 0.0f;
 
     // Third-person character state
     glm::vec3 characterPosition = glm::vec3(0.0f);

include/rendering/terrain_manager.hpp

@@ -319,10 +319,13 @@ private:
     std::shared_ptr<PendingTile> getCachedTile(const TileCoord& coord);
     void putCachedTile(const std::shared_ptr<PendingTile>& tile);
     size_t estimatePendingTileBytes(const PendingTile& tile) const;
+    void logMissingAdtOnce(const std::string& adtPath);
     std::atomic<bool> workerRunning{false};
 
     // Track tiles currently queued or being processed to avoid duplicates
     std::unordered_map<TileCoord, bool, TileCoord::Hash> pendingTiles;
+    std::unordered_set<std::string> missingAdtWarnings_;
+    std::mutex missingAdtWarningsMutex_;
 
     // Dedup set for doodad placements across tile boundaries
     std::unordered_set<uint32_t> placedDoodadIds;

include/rendering/terrain_renderer.hpp

@@ -207,6 +207,8 @@ private:
 
     // Default white texture (fallback)
     GLuint whiteTexture = 0;
+    // Opaque alpha fallback for missing/invalid layer alpha maps
+    GLuint opaqueAlphaTexture = 0;
 
     // Shadow mapping (receiving)
     GLuint shadowDepthTex = 0;

include/rendering/wmo_renderer.hpp

@@ -121,6 +121,10 @@ public:
      * @param instanceId Instance to remove
      */
     void removeInstance(uint32_t instanceId);
+    /**
+     * Remove multiple WMO instances with a single spatial-index rebuild.
+     */
+    void removeInstances(const std::vector<uint32_t>& instanceIds);
 
     /**
      * Remove all instances