fix: R key resets camera angles only; consume all SpellCastTargets bytes

- CameraController::resetAngles(): new method that only resets yaw/pitch
  without teleporting the player. R key now calls resetAngles() instead
  of reset() so pressing R no longer moves the character to spawn.
  The full reset() (position + angles) is still used on world-entry and
  respawn via application.cpp.

- packet_parsers_classic: parseSpellStart now calls
  skipClassicSpellCastTargets() to consume all target payload bytes
  (UNIT, ITEM, SOURCE_LOCATION, DEST_LOCATION, etc.) instead of only
  handling UNIT/OBJECT. Prevents packet-read corruption for ground-
  targeted AoE spells.

- packet_parsers_tbc: added skipTbcSpellCastTargets() static helper
  (uint32 targetFlags, full payload coverage including TRADE_ITEM and
  STRING targets). parseSpellStart now uses it.

src/rendering/camera_controller.cpp

@@ -388,10 +388,11 @@ void CameraController::update(float deltaTime) {
     if (mounted_) sitting = false;
     xKeyWasDown = xDown;
 
-    // Reset camera with R key (edge-triggered) — only when UI doesn't want keyboard
+    // Reset camera angles with R key (edge-triggered) — only when UI doesn't want keyboard
+    // Does NOT move the player; full reset() is reserved for world-entry/respawn.
     bool rDown = !uiWantsKeyboard && input.isKeyPressed(SDL_SCANCODE_R);
     if (rDown && !rKeyWasDown) {
-        reset();
+        resetAngles();
     }
     rKeyWasDown = rDown;
 
@@ -1941,6 +1942,14 @@ void CameraController::processMouseButton(const SDL_MouseButtonEvent& event) {
     mouseButtonDown = anyDown;
 }
 
+void CameraController::resetAngles() {
+    if (!camera) return;
+    yaw = defaultYaw;
+    facingYaw = defaultYaw;
+    pitch = defaultPitch;
+    camera->setRotation(yaw, pitch);
+}
+
 void CameraController::reset() {
     if (!camera) {
         return;