Add spellbook, fix WMO floor clipping, and polish UI/visuals

- Add spellbook screen (P key) with Spell.dbc name lookup and action bar assignment
- Default Attack and Hearthstone spells available in single player
- Fix WMO floor clipping (gryphon roost) by tightening ceiling rejection threshold
- Darken ocean water, increase wave motion and opacity
- Add M2 model distance fade-in to prevent pop-in
- Reposition chat window, add slash/enter key focus
- Remove debug key commands (keep only F1 perf HUD, N minimap)
- Performance: return chat history by const ref, use deque for O(1) pop_front

include/game/game_handler.hpp

@@ -8,6 +8,7 @@
 #include <memory>
 #include <string>
 #include <vector>
+#include <deque>
 #include <array>
 #include <functional>
 #include <cstdint>
@@ -151,7 +152,7 @@ public:
      * @param maxMessages Maximum number of messages to return (0 = all)
      * @return Vector of chat messages
      */
-    std::vector<MessageChatData> getChatHistory(size_t maxMessages = 50) const;
+    const std::deque<MessageChatData>& getChatHistory() const { return chatHistory; }
 
     /**
      * Add a locally-generated chat message (e.g., emote feedback)
@@ -401,7 +402,7 @@ private:
     EntityManager entityManager;             // Manages all entities in view
 
     // Chat
-    std::vector<MessageChatData> chatHistory;  // Recent chat messages
+    std::deque<MessageChatData> chatHistory;    // Recent chat messages
     size_t maxChatHistory = 100;             // Maximum chat messages to keep
 
     // Targeting

include/rendering/m2_renderer.hpp

@@ -48,6 +48,7 @@ struct M2ModelGPU {
     bool collisionSmallSolidProp = false;
     bool collisionNarrowVerticalProp = false;
     bool collisionNoBlock = false;
+    bool collisionStatue = false;
 
     std::string name;
 

include/rendering/wmo_renderer.hpp

@@ -235,6 +235,7 @@ private:
         glm::mat4 invModelMatrix;  // Cached inverse for collision
         glm::vec3 worldBoundsMin;
         glm::vec3 worldBoundsMax;
+        std::vector<std::pair<glm::vec3, glm::vec3>> worldGroupBounds;
 
         void updateModelMatrix();
     };

include/ui/game_screen.hpp

@@ -3,6 +3,7 @@
 #include "game/game_handler.hpp"
 #include "game/inventory.hpp"
 #include "ui/inventory_screen.hpp"
+#include "ui/spellbook_screen.hpp"
 #include <imgui.h>
 #include <string>
 
@@ -110,6 +111,7 @@ private:
      * Inventory screen
      */
     InventoryScreen inventoryScreen;
+    SpellbookScreen spellbookScreen;
 };
 
 }} // namespace wowee::ui

include/ui/spellbook_screen.hpp

@@ -0,0 +1,38 @@
+#pragma once
+
+#include "game/game_handler.hpp"
+#include <imgui.h>
+#include <string>
+#include <unordered_map>
+
+namespace wowee {
+
+namespace pipeline { class AssetManager; }
+
+namespace ui {
+
+class SpellbookScreen {
+public:
+    void render(game::GameHandler& gameHandler, pipeline::AssetManager* assetManager);
+    bool isOpen() const { return open; }
+    void toggle() { open = !open; }
+    void setOpen(bool o) { open = o; }
+
+private:
+    bool open = false;
+    bool pKeyWasDown = false;
+
+    // Spell name cache (loaded from Spell.dbc)
+    bool dbcLoaded = false;
+    bool dbcLoadAttempted = false;
+    std::unordered_map<uint32_t, std::string> spellNames;
+
+    // Action bar assignment
+    int assigningSlot = -1;  // Which action bar slot is being assigned (-1 = none)
+
+    void loadSpellDBC(pipeline::AssetManager* assetManager);
+    std::string getSpellName(uint32_t spellId) const;
+};
+
+} // namespace ui
+} // namespace wowee