chore(renderer): extract AnimationController and remove audio pass-throughs

Extract ~1,500 lines of character animation state from Renderer into a dedicated
AnimationController class, and complete the AudioCoordinator migration by removing
all 10 audio pass-through getters from Renderer.

AnimationController:
- New: include/rendering/animation_controller.hpp (182 lines)
- New: src/rendering/animation_controller.cpp (1,703 lines)
- Moves: locomotion state machine (50+ members), mount animation (40+ members),
  emote system, footstep triggering, surface detection, melee combat animations
- Renderer holds std::unique_ptr<AnimationController> and delegates completely
- AnimationController accesses audio via renderer_->getAudioCoordinator()

Audio caller migration:
- Migrate ~60 external callers from renderer->getXManager() to AudioCoordinator
  directly, grouped by access pattern:
  - UIServices: settings_panel, game_screen, toast_manager, chat_panel,
    combat_ui, window_manager
  - GameServices: game_handler, spell_handler, inventory_handler, quest_handler,
    social_handler, combat_handler
  - Application singleton: application.cpp, auth_screen.cpp, lua_engine.cpp
- Remove 10 pass-through getter definitions from renderer.cpp
- Remove 10 pass-through getter declarations from renderer.hpp
- Remove individual audio manager forward declarations from renderer.hpp
- Redirect 69 internal renderer.cpp audio calls to audioCoordinator_ directly
- game_handler.cpp: withSoundManager template uses services_.audioCoordinator;
  MFP changed from &Renderer::getUiSoundManager to &AudioCoordinator::getUiSoundManager
- GameServices struct: add AudioCoordinator* audioCoordinator member
- settings_panel: applyAudioVolumes(Renderer*) -> applyAudioVolumes(AudioCoordinator*)

src/game/combat_handler.cpp

@@ -6,6 +6,7 @@
 #include "game/update_field_table.hpp"
 #include "game/opcode_table.hpp"
 #include "rendering/renderer.hpp"
+#include "audio/audio_coordinator.hpp"
 #include "audio/combat_sound_manager.hpp"
 #include "audio/activity_sound_manager.hpp"
 #include "core/application.hpp"
@@ -451,8 +452,8 @@ void CombatHandler::handleAttackerStateUpdate(network::Packet& packet) {
     }
 
     // Play combat sounds via CombatSoundManager + character vocalizations
-    if (auto* renderer = owner_.services().renderer) {
-        if (auto* csm = renderer->getCombatSoundManager()) {
+    if (auto* ac = owner_.services().audioCoordinator) {
+        if (auto* csm = ac->getCombatSoundManager()) {
             auto weaponSize = audio::CombatSoundManager::WeaponSize::MEDIUM;
             if (data.isMiss()) {
                 csm->playWeaponMiss(false);
@@ -466,7 +467,7 @@ void CombatHandler::handleAttackerStateUpdate(network::Packet& packet) {
             }
         }
         // Character vocalizations
-        if (auto* asm_ = renderer->getActivitySoundManager()) {
+        if (auto* asm_ = ac->getActivitySoundManager()) {
             if (isPlayerAttacker && !data.isMiss() && data.victimState != 1 && data.victimState != 2) {
                 asm_->playAttackGrunt();
             }