Fix interior WMO floor gaps, water exit stair clipping, NPC equipment, portal animation

- Fix Stormwind barracks floor: interior WMO groups named "facade" were
  incorrectly marked as LOD shells and hidden when close. Add !isIndoor
  guard to all LOD detection conditions so interior groups always render.
- Fix water exit stair clipping: anchor lastGroundZ to current position
  on swim exit, set grounded=true for full step-up budget, add upward
  velocity boost to clear stair lip geometry.
- Re-enable NPC humanoid equipment geosets (kEnableNpcHumanoidOverrides)
  so guards render with proper armor instead of underwear.
- Keep instance portal GameObjects animated (spinning/glowing) instead
  of freezing all GO animations indiscriminately.
- Fix equipment disappearing after instance round-trip by resetting
  dirty tracking on world reload.
- Fix multi-doodad-set loading: load both set 0 (global) and placement-
  specific doodad set, with dedup to avoid double-loading.
- Clear placedWmoIds in softReset/unloadAll to prevent stale dedup.
- Apply MODF rotation to instance WMOs, snap player to WMO floor.
- Re-enable rebuildSpatialIndex in setInstanceTransform.
- Store precomputeFloorCache results in precomputed grid.
- Add F8 debug key for WMO floor diagnostics at player position.
- Expand mapIdToName with all Classic/TBC/WotLK instance map IDs.

src/rendering/terrain_manager.cpp

@@ -522,10 +522,18 @@ std::shared_ptr<PendingTile> TerrainManager::prepareTile(int x, int y) {
                     wmoMatrix = glm::rotate(wmoMatrix, rot.y, glm::vec3(0, 1, 0));
                     wmoMatrix = glm::rotate(wmoMatrix, rot.x, glm::vec3(1, 0, 0));
 
-                    const auto& doodadSet = wmoModel.doodadSets[0];
+                    // Load doodads from set 0 (global) + placement-specific set
+                    std::vector<uint32_t> setsToLoad = {0};
+                    if (placement.doodadSet > 0 && placement.doodadSet < wmoModel.doodadSets.size()) {
+                        setsToLoad.push_back(placement.doodadSet);
+                    }
+                    std::unordered_set<uint32_t> loadedDoodadIndices;
+                    for (uint32_t setIdx : setsToLoad) {
+                        const auto& doodadSet = wmoModel.doodadSets[setIdx];
                     for (uint32_t di = 0; di < doodadSet.count; di++) {
                         uint32_t doodadIdx = doodadSet.startIndex + di;
                         if (doodadIdx >= wmoModel.doodads.size()) break;
+                        if (!loadedDoodadIndices.insert(doodadIdx).second) continue;
 
                         const auto& doodad = wmoModel.doodads[doodadIdx];
                         auto nameIt = wmoModel.doodadNames.find(doodad.nameIndex);
@@ -623,6 +631,7 @@ std::shared_ptr<PendingTile> TerrainManager::prepareTile(int x, int y) {
                         doodadReady.modelMatrix = worldMatrix;
                         pending->wmoDoodads.push_back(std::move(doodadReady));
                     }
+                    }
                 }
 
                 PendingTile::WMOReady ready;
@@ -1311,6 +1320,7 @@ void TerrainManager::unloadAll() {
     pendingTiles.clear();
     finalizingTiles_.clear();
     placedDoodadIds.clear();
+    placedWmoIds.clear();
 
     LOG_INFO("Unloading all terrain tiles");
     loadedTiles.clear();
@@ -1358,6 +1368,7 @@ void TerrainManager::softReset() {
     pendingTiles.clear();
     finalizingTiles_.clear();
     placedDoodadIds.clear();
+    placedWmoIds.clear();
 
     // Clear tile cache — keys are (x,y) without map name, so stale entries from
     // a different map with overlapping coordinates would produce wrong geometry.