feat(buildings): implement material consumption for skyfaller caller

- Add material requirement checks before calling skyfallers
- Implement material consumption logic from orbital trade beacons
- Add cost display in building descriptions and inspector
- Set WorkToBuild to 0 for all drop buildings
- Add cancel command for active skyfaller calls
- Improve condition checking and error messaging

1.6/1.6/Defs/ThingDefs_Buildings/WULA_Drop_Buildings.xml

@@ -37,7 +37,7 @@
     <terrainAffordanceNeeded>Light</terrainAffordanceNeeded>
     <statBases>
       <MaxHitPoints>1</MaxHitPoints>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
       <Mass>1</Mass>
       <Flammability>0</Flammability>
     </statBases>
@@ -195,7 +195,7 @@
       <MarketValue>1</MarketValue>
       <MaxHitPoints>1</MaxHitPoints>
       <Flammability>0</Flammability>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
     </statBases>
     <costList>
       <WULA_Alloy>10</WULA_Alloy>
@@ -439,7 +439,7 @@
     </placeWorkers>
     <statBases>
       <MaxHitPoints>1</MaxHitPoints>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
       <Mass>1</Mass>
       <Flammability>0</Flammability>
     </statBases>
@@ -639,7 +639,7 @@
     </researchPrerequisites>
     <statBases>
       <MaxHitPoints>1</MaxHitPoints>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
       <Mass>1</Mass>
       <Flammability>0</Flammability>
     </statBases>
@@ -869,7 +869,7 @@
     </researchPrerequisites>
     <statBases>
       <MaxHitPoints>1</MaxHitPoints>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
       <Mass>1</Mass>
       <Flammability>0</Flammability>
     </statBases>
@@ -1037,7 +1037,7 @@
     </researchPrerequisites>
     <statBases>
       <MaxHitPoints>1</MaxHitPoints>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
       <Mass>1</Mass>
       <Flammability>0</Flammability>
     </statBases>
@@ -1197,7 +1197,7 @@
     </researchPrerequisites>
     <statBases>
       <MaxHitPoints>1</MaxHitPoints>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
       <Mass>1</Mass>
       <Flammability>0</Flammability>
     </statBases>
@@ -1371,7 +1371,7 @@
     </researchPrerequisites>
     <statBases>
       <MaxHitPoints>1</MaxHitPoints>
-      <WorkToBuild>1</WorkToBuild>
+      <WorkToBuild>0</WorkToBuild>
       <Mass>1</Mass>
       <Flammability>0</Flammability>
     </statBases>

1.6/1.6/Languages/ChineseSimplified (简体中文)/Keyed/WULA_Keyed.xml

@@ -114,4 +114,13 @@
   <WULA_GatheringMaterials>正在收集材料</WULA_GatheringMaterials>
   <WULA_Paused>已暂停</WULA_Paused>
 
+  <!-- CompSkyfallerCaller new keys -->
+  <WULA_RequiredMaterials>所需材料：</WULA_RequiredMaterials>
+  <WULA_InsufficientMaterials>轨道信标范围内材料不足</WULA_InsufficientMaterials>
+
+  <!-- Cancel Skyfaller -->
+  <WULA_CancelSkyfaller>取消呼叫</WULA_CancelSkyfaller>
+  <WULA_CancelSkyfallerDesc>中止正在进行的空投呼叫。</WULA_CancelSkyfallerDesc>
+  <WULA_SkyfallerCallCancelled>空投呼叫已取消。</WULA_SkyfallerCallCancelled>
+
 </LanguageData>