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

include/ui/auth_screen.hpp

@@ -131,6 +131,35 @@ private:
     std::vector<std::string> introTracks_;
     bool loginMusicVolumeAdjusted_ = false;
     int savedMusicVolume_ = 30;
+
+    // ----- Login-screen graphics settings popup -----
+    bool showLoginSettings_ = false;
+
+    // Local copies of the settings keys we expose in the login popup.
+    // Loaded on first open; saved on Apply.
+    struct LoginGraphicsState {
+        int  preset          = 2;   // 0=Custom 1=Low 2=Medium 3=High 4=Ultra
+        bool shadows         = true;
+        float shadowDistance = 300.0f;
+        int  antiAliasing    = 0;   // 0=Off 1=2x 2=4x 3=8x
+        bool fxaa            = false;
+        bool normalMapping   = true;
+        bool pom             = true;
+        int  pomQuality      = 1;   // 0=Low 1=Medium 2=High
+        int  upscalingMode   = 0;   // 0=Off 1=FSR1 2=FSR3
+        bool waterRefraction = true;
+        int  groundClutter   = 100; // 0-150
+        int  brightness      = 50;  // 0-100
+        bool vsync           = false;
+        bool fullscreen      = false;
+    };
+    LoginGraphicsState loginGfx_;
+    bool loginGfxLoaded_ = false;
+
+    void renderLoginSettingsWindow();
+    void loadLoginGraphicsState();
+    void saveLoginGraphicsState();
+    static void applyPresetToState(LoginGraphicsState& s, int preset);
 };
 
 }} // namespace wowee::ui