Fix classic combat desync and separate attack intent from confirmed combat

Combat state/UI:

- Split attack intent from server-confirmed auto attack in GameHandler.

- Add explicit combat state helpers (intent, confirmed, combat-with-target).

- Update player/target frame and renderer in-combat indicators to use confirmed combat.

- Add intent-only visual state in UI to avoid false combat feedback.

Animation correctness:

- Correct combat-ready animation IDs to canonical ready stances (22/23/24/25).

- Remove hit/wound-like stance behavior caused by incorrect ready IDs.

Classic/TBC/Turtle melee reliability:

- Tighten melee sync while attack intent is active: faster swing resend, tighter facing threshold, and faster facing cadence for classic-like expansions.

- Send immediate movement heartbeat after facing corrections and during stationary melee sync windows.

- Handle melee error opcodes explicitly (NOTINRANGE/BADFACING/NOTSTANDING/CANT_ATTACK) and immediately resync facing/swing where appropriate.

- On ATTACKSTOP with persistent intent, immediately reassert ATTACKSWING.

- Increase movement heartbeat cadence during active classic-like melee intent.

Server compatibility/anti-cheat stability:

- Restrict legacy force-movement/speed/teleport ACK behavior for classic-like flows to avoid unsolicited order acknowledgements.

- Preserve local movement state updates while preventing bad-order ACK noise.

src/rendering/renderer.cpp

@@ -960,9 +960,11 @@ void Renderer::updateCharacterAnimation() {
     constexpr uint32_t ANIM_SWIM_IDLE  = 41;  // Treading water (SwimIdle)
     constexpr uint32_t ANIM_SWIM       = 42;  // Swimming forward (Swim)
     constexpr uint32_t ANIM_MOUNT      = 91;  // Seated on mount
-    constexpr uint32_t ANIM_READY_UNARMED = 7;   // Combat ready stance (unarmed)
-    constexpr uint32_t ANIM_READY_1H     = 8;   // Combat ready stance (1H weapon)
-    constexpr uint32_t ANIM_READY_2H     = 9;   // Combat ready stance (2H weapon)
+    // Canonical player ready stances (AnimationData.dbc)
+    constexpr uint32_t ANIM_READY_UNARMED = 22;  // ReadyUnarmed
+    constexpr uint32_t ANIM_READY_1H      = 23;  // Ready1H
+    constexpr uint32_t ANIM_READY_2H      = 24;  // Ready2H
+    constexpr uint32_t ANIM_READY_2H_L    = 25;  // Ready2HL (some 2H left-handed rigs)
     constexpr uint32_t ANIM_FLY_IDLE   = 158; // Flying mount idle/hover
     constexpr uint32_t ANIM_FLY_FORWARD = 159; // Flying mount forward
 
@@ -1613,7 +1615,9 @@ void Renderer::updateCharacterAnimation() {
             break;
         case CharAnimState::MOUNT:      animId = ANIM_MOUNT;      loop = true;  break;
         case CharAnimState::COMBAT_IDLE:
-            animId = pickFirstAvailable({ANIM_READY_1H, ANIM_READY_2H, ANIM_READY_UNARMED}, ANIM_STAND);
+            animId = pickFirstAvailable(
+                {ANIM_READY_1H, ANIM_READY_2H, ANIM_READY_2H_L, ANIM_READY_UNARMED},
+                ANIM_STAND);
             loop = true;
             break;
         case CharAnimState::CHARGE: