✨ Försterkreislauf: Setzlinge beim Fällen, Försterhaus, Förster-Job

- Gefällter Baum → 1–2 tree_seed im Stockpile (zufällig)
- Neues Gebäude forester_hut (50 wood): Log-Hütten-Grafik, Klick öffnet Info-Panel
- Zonenmarkierung: Edit-Zone-Tool, Radius 5 Tiles, halbtransparente Overlay-Anzeige
- Neuer JobType 'forester': Nisse pflanzen Setzlinge auf markierten Zonen-Tiles
- Chop-Priorisierung: Zonen-Bäume werden vor natürlichen Bäumen gefällt
- Nisse-Panel & Info-Panel zeigen forester-Priorität-Button

Closes #25

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/StateManager.ts

@@ -19,6 +19,7 @@ function makeEmptyWorld(seed: number): WorldState {
     stockpile: { wood: 10, stone: 5, wheat_seed: 10, carrot_seed: 5, wheat: 0, carrot: 0, tree_seed: 5 },
     treeSeedlings: {},
     tileRecovery: {},
+    foresterZones: {},
   }
 }
 
@@ -65,11 +66,20 @@ class StateManager {
         w.buildings[action.building.id] = action.building
         for (const [k, v] of Object.entries(action.costs))
           w.stockpile[k as ItemId] = Math.max(0, (w.stockpile[k as ItemId] ?? 0) - (v ?? 0))
+        // Automatically create an empty forester zone when a forester hut is placed
+        if (action.building.kind === 'forester_hut') {
+          w.foresterZones[action.building.id] = { buildingId: action.building.id, tiles: [] }
+        }
         break
       }
 
       case 'REMOVE_BUILDING':
-        delete w.buildings[action.buildingId]; break
+        // Remove associated forester zone when the hut is demolished
+        if (w.buildings[action.buildingId]?.kind === 'forester_hut') {
+          delete w.foresterZones[action.buildingId]
+        }
+        delete w.buildings[action.buildingId]
+        break
 
       case 'ADD_ITEMS':
         for (const [k, v] of Object.entries(action.items))
@@ -169,6 +179,12 @@ class StateManager {
       case 'TILE_RECOVERY_START':
         w.tileRecovery[`${action.tileX},${action.tileY}`] = TILE_RECOVERY_MS
         break
+
+      case 'FORESTER_ZONE_UPDATE': {
+        const zone = w.foresterZones[action.buildingId]
+        if (zone) zone.tiles = [...action.tiles]
+        break
+      }
     }
   }
 
@@ -242,9 +258,18 @@ class StateManager {
       if (!p.world.stockpile)      p.world.stockpile      = {}
       if (!p.world.treeSeedlings)  p.world.treeSeedlings  = {}
       if (!p.world.tileRecovery)   p.world.tileRecovery   = {}
+      if (!p.world.foresterZones)  p.world.foresterZones  = {}
       // Reset in-flight AI states to idle on load so runtime timers start fresh
       for (const v of Object.values(p.world.villagers)) {
         if (v.aiState === 'walking' || v.aiState === 'working') v.aiState = 'idle'
+        // Migrate older saves that don't have the forester priority
+        if (typeof (v.priorities as any).forester === 'undefined') v.priorities.forester = 4
+      }
+      // Rebuild forester zones for huts that predate the foresterZones field
+      for (const b of Object.values(p.world.buildings)) {
+        if (b.kind === 'forester_hut' && !p.world.foresterZones[b.id]) {
+          p.world.foresterZones[b.id] = { buildingId: b.id, tiles: [] }
+        }
       }
       return p
     } catch (_) { return null }