Housing: Fix DB2 field ordering, door placement, and fixture validation

Fix ExteriorComponentHookEntry struct field order to match DB2 LoadInfo
(Position/Rotation before ID when IndexField=2), resolving garbage hook
IDs during fixture resolution.

Replace first-match door hook selection with center-front scoring
heuristic (|X|*2 + Y) to ensure the main entrance spawns at the front
of the house rather than on a side/back wall.

Add fixture validation in SelectFixtureOption: enforce component type
must match hook type, and only one door allowed per house. This prevents
placing windows at door hooks and spawning multiple entrances.

Only auto-resolve the single best door hook during SpawnExtCompTree —
other fixture types (windows, chimneys, dormers) require explicit player
selection, matching retail behavior where they unlock via progression.

Additional fixes: unique fixture GUIDs via atomic counter (subType=5),
size-aware default fixture lookup, range-based DB2 store iteration,
and starter fixture migration that preserves existing roots.

src/server/game/Housing/Housing.cpp

@@ -317,6 +317,14 @@ bool Housing::LoadFromDB(PreparedQueryResult housing, PreparedQueryResult decor,
         } while (fixtures->NextRow());
     }
 
+    // Migration: populate starter fixtures for houses created before persistence was added
+    if (_fixtures.empty() && _houseType != 0)
+    {
+        TC_LOG_INFO("housing", "Housing::LoadFromDB: No fixtures found for house {} ? populating starter fixtures (migration)",
+            _houseGuid.ToString());
+        PopulateStarterFixtures();
+    }
+
     // Load catalog
     //           0             1        2           3
     // SELECT houseDecorId, quantity, sourceType, sourceValue

src/server/game/Housing/HousingMap.cpp

@@ -299,7 +299,7 @@ void HousingMap::SpawnPlotGameObjects()
             // fragment, SpellForVisuals, SpellXSpellVisualID) BEFORE the CREATE_OBJECT
             // packet is sent. The client needs FHousingPlotAreaTrigger_C and
             // DecalPropertiesId=621 in the initial create to render the plot border decal.
-            AreaTrigger* plotAt = AreaTrigger::CreateStaticAreaTrigger({ .Id = 37358, .IsCustom = false }, this, atPos, -1);
+            AreaTrigger* plotAt = AreaTrigger::CreateStaticAreaTrigger({ .Id = 37358, .IsCustom = false }, this, atPos, -1, false);
             if (plotAt)
             {
                 PhasingHandler::InitDbPhaseShift(plotAt->GetPhaseShift(), PHASE_USE_FLAGS_ALWAYS_VISIBLE, 0, 0);
@@ -385,11 +385,14 @@ void HousingMap::SpawnPlotGameObjects()
         TC_LOG_DEBUG("housing", "HousingMap::SpawnPlotGameObjects: Plot {} using ExteriorComponentID={}, WmoDataID={}",
             plotIdx, exteriorComponentID, houseExteriorWmoDataID);
 
-        // Build fixture + root override maps from player's saved fixture selections
+        // Build fixture + root override maps from player's saved fixture selections.
+        // Always pass rootOverrides when housing exists ? the map controls which root types spawn.
+        // nullptr = no housing data (unowned plot), spawn all roots.
+        // Non-null = only spawn types present in the map.
         FixtureOverrideMap fixtureOverrides = housing->GetFixtureOverrideMap();
         FixtureOverrideMap const* overridesPtr = fixtureOverrides.empty() ? nullptr : &fixtureOverrides;
         RootOverrideMap rootOverrides = housing->GetRootComponentOverrides();
-        RootOverrideMap const* rootOvrPtr = rootOverrides.empty() ? nullptr : &rootOverrides;
+        RootOverrideMap const* rootOvrPtr = &rootOverrides;
 
         GameObject* houseGo = nullptr;
         if (housing->HasCustomPosition())
@@ -677,7 +680,7 @@ bool HousingMap::AddPlayerToMap(Player* player, bool initPlayer /*= true*/)
                 auto fixtureOverrides = housing->GetFixtureOverrideMap();
                 FixtureOverrideMap const* overridesPtr = fixtureOverrides.empty() ? nullptr : &fixtureOverrides;
                 auto rootOverrides = housing->GetRootComponentOverrides();
-                RootOverrideMap const* rootOvrPtr = rootOverrides.empty() ? nullptr : &rootOverrides;
+                RootOverrideMap const* rootOvrPtr = &rootOverrides;
 
                 GameObject* go = nullptr;
                 if (housing->HasCustomPosition())
@@ -718,7 +721,7 @@ bool HousingMap::AddPlayerToMap(Player* player, bool initPlayer /*= true*/)
                     auto lateFixtureOvr = housing->GetFixtureOverrideMap();
                     FixtureOverrideMap const* lateFixturePtr = lateFixtureOvr.empty() ? nullptr : &lateFixtureOvr;
                     auto lateRootOvr = housing->GetRootComponentOverrides();
-                    RootOverrideMap const* lateRootPtr = lateRootOvr.empty() ? nullptr : &lateRootOvr;
+                    RootOverrideMap const* lateRootPtr = &lateRootOvr;
 
                     SpawnFullHouseMeshObjects(plotIdx, pos, rot,
                         housing->GetHouseGuid(), lateExtCompID, lateWmoDataID, faction,
@@ -2097,6 +2100,13 @@ void HousingMap::SpawnFullHouseMeshObjects(uint8 plotIndex, Position const& hous
                     auto ovrItr = rootOverrides->find(type);
                     if (ovrItr != rootOverrides->end())
                         selectedCompID = ovrItr->second;
+                    else
+                    {
+                        // Type not in fixtures DB ? not unlocked yet, skip it
+                        TC_LOG_DEBUG("housing", "SpawnFullHouseMeshObjects: Skipping root type={} ? not in fixtures",
+                            type);
+                        continue;
+                    }
                 }
 
                 // 2. For the core type, use the player's selected coreExtCompID