Add hostility and originProvinceId to ArmyStats

The client was crashing with KeyNotFoundException because ArmyStats
didn't include originProvinceId. The protobuf already had these fields
but they weren't populated from the Scala model.

Changes:
- Add hostility and originProvinceId fields to Scala ArmyStats
- Update AvailableAttackDecisionCommandFactory to populate new fields
- Update AvailableFreeForAllDecisionCommandFactory to populate new fields
- Update AvailableCommandConverter to include fields in protobuf
- Add necessary BUILD.bazel dependencies

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/main/scala/net/eagle0/eagle/library/actions/availability/AvailableAttackDecisionCommandFactory.scala

@@ -62,11 +62,13 @@ object AvailableAttackDecisionCommandFactory extends ScalaAvailableCommandsFacto
       .takeRight(heroCount)
       .sum
 
-    province.rulingFactionId.map { _ =>
+    province.rulingFactionId.map { defenderFid =>
       ArmyStats(
-        factionId = province.rulingFactionId.get,
+        factionId = defenderFid,
         heroCount = heroCount,
-        troopCount = troopCount
+        troopCount = troopCount,
+        hostility = FactionUtils.hostilityStatus(attackerFid, defenderFid, gs.factions.values.toVector),
+        originProvinceId = Some(pid)
       )
     }
   }
@@ -76,22 +78,26 @@ object AvailableAttackDecisionCommandFactory extends ScalaAvailableCommandsFacto
       pid: ProvinceId,
       gs: GameState
   ): Vector[ArmyStats] =
-    relevantArmies(pid, gs).map(ma => stats(ma.army, gs)) ++ defendingArmyStats(
+    relevantArmies(pid, gs).map(ma => stats(toFid, ma, gs)) ++ defendingArmyStats(
       toFid,
       pid,
       gs
     )
 
   private def stats(
-      army: Army,
+      viewerFid: FactionId,
+      movingArmy: MovingArmy,
       gs: GameState
   ): ArmyStats = {
+    val army       = movingArmy.army
     val battalions = army.units.flatMap(_.battalionId).map(gs.battalions)
     val troopCount = battalions.map(_.size).sum
     ArmyStats(
       factionId = army.factionId,
       heroCount = army.units.size,
-      troopCount = troopCount
+      troopCount = troopCount,
+      hostility = FactionUtils.hostilityStatus(viewerFid, army.factionId, gs.factions.values.toVector),
+      originProvinceId = Some(movingArmy.originProvinceId)
     )
   }
 

src/main/scala/net/eagle0/eagle/library/actions/availability/AvailableFreeForAllDecisionCommandFactory.scala

@@ -1,6 +1,7 @@
 package net.eagle0.eagle.library.actions.availability
 
 import net.eagle0.eagle.{FactionId, ProvinceId}
+import net.eagle0.eagle.library.util.faction_utils.FactionUtils
 import net.eagle0.eagle.library.util.IncomingArmyUtils
 import net.eagle0.eagle.model.state.{Army, HostileArmyGroupStatus, MovingArmy}
 import net.eagle0.eagle.model.state.command.available.AvailableCommand
@@ -53,19 +54,22 @@ object AvailableFreeForAllDecisionCommandFactory extends ScalaAvailableCommandsF
       pid: ProvinceId,
       gs: GameState
   ): Vector[ArmyStats] =
-    relevantArmies(pid, gs).map(ma => stats(toFid, ma.army, gs))
+    relevantArmies(pid, gs).map(ma => stats(toFid, ma, gs))
 
   private def stats(
-      toFid: FactionId,
-      army: Army,
+      viewerFid: FactionId,
+      movingArmy: MovingArmy,
       gs: GameState
   ): ArmyStats = {
+    val army       = movingArmy.army
     val battalions = army.units.flatMap(_.battalionId).map(gs.battalions)
     val troopCount = battalions.map(_.size).sum
     ArmyStats(
       factionId = army.factionId,
       heroCount = army.units.size,
-      troopCount = troopCount
+      troopCount = troopCount,
+      hostility = FactionUtils.hostilityStatus(viewerFid, army.factionId, gs.factions.values.toVector),
+      originProvinceId = Some(movingArmy.originProvinceId)
     )
   }
 

src/main/scala/net/eagle0/eagle/library/actions/availability/BUILD.bazel

@@ -316,6 +316,7 @@ scala_library(
         ":scala_available_commands_factory",
         "//src/main/scala/net/eagle0/eagle:eagle_pkg",
         "//src/main/scala/net/eagle0/eagle/library/util:incoming_army_utils",
+        "//src/main/scala/net/eagle0/eagle/library/util/faction_utils",
         "//src/main/scala/net/eagle0/eagle/model/state:army",
         "//src/main/scala/net/eagle0/eagle/model/state:round_phase",
         "//src/main/scala/net/eagle0/eagle/model/state/command/available",

src/main/scala/net/eagle0/eagle/model/proto_converters/command/available/AvailableCommandConverter.scala

@@ -499,7 +499,9 @@ object AvailableCommandConverter {
     net.eagle0.eagle.api.command.util.army_stats.ArmyStats(
       factionId = stats.factionId,
       heroCount = stats.heroCount,
-      troopCount = stats.troopCount
+      troopCount = stats.troopCount,
+      hostility = stats.hostility,
+      originProvinceId = stats.originProvinceId.getOrElse(0)
     )
 
   private def expandedCombatUnitToProto(

src/main/scala/net/eagle0/eagle/model/state/command/available/AvailableCommand.scala

@@ -1,5 +1,6 @@
 package net.eagle0.eagle.model.state.command.available
 
+import net.eagle0.common.hostility.Hostility
 import net.eagle0.eagle.{BattalionId, FactionId, HeroId, ProvinceId}
 import net.eagle0.eagle.model.state.command.common.*
 import net.eagle0.eagle.model.state.diplomacy_offer.status.Status
@@ -199,7 +200,9 @@ object AvailableCommand:
   case class ArmyStats(
       factionId: FactionId,
       heroCount: Int,
-      troopCount: Int
+      troopCount: Int,
+      hostility: Hostility = Hostility.ENEMY_HOSTILITY,
+      originProvinceId: Option[ProvinceId] = None
   )
 
   case class ExpandedCombatUnit(

src/main/scala/net/eagle0/eagle/model/state/command/available/BUILD.bazel

@@ -18,6 +18,7 @@ scala_library(
         "//src/test/scala/net/eagle0/eagle/model/state/command:__subpackages__",
     ],
     deps = [
+        "//src/main/protobuf/net/eagle0/common:hostility_scala_proto",
         "//src/main/scala/net/eagle0/eagle:eagle_pkg",
         "//src/main/scala/net/eagle0/eagle/model/state/command/common",
         "//src/main/scala/net/eagle0/eagle/model/state/diplomacy_offer/status",