feat(occupation): 职业系统第一片 — Kernel 结构 / bootstrap 注入 / 存档 v3

Occupation.fs（Kind/Profile/State + 农夫/渔夫/货郎/书生 中文名常量，按设计 §1 表给初始 Money/Energy/Inventory）；ItemKind 扩出 Fish/Spice/Scroll（basePrice 分支补齐，Food 10.0f 数值路径不变 → 无职业 digest 不动）；WorldBootstrap.initialWorldWithOccupation 默认 None = 旧行为（Money/Energy 覆盖，库存字段先留数据侧、物理挂接留交易单——取舍见 design §2-C 反对加字段）；WorldSave: v3 头仅在有职业时写入（保存 saveToFileWith / loadFromFileWith，v1/v2/v3 无职业类型默认，token 顺序 version|w|h|kind|task|story|…），默认路径 save 输出逐字节等同现行 v2；P10 测试 5 例（§1 表值、v3 round-trip、v1/v2 不吞档、双 seed 逐字节、中文名）；Kernel.Tests 引用 Desktop 以驱动 WorldBootstrap（取舍：不做测试专用 shim）。TaskToken/StoryStage 为 v3 占位（任务系统后续单实现）。

1 files changed, 20 insertions, 5 deletions

diff --git a/src/LivingVillage.Desktop/WorldBootstrap.fs b/src/LivingVillage.Desktop/WorldBootstrap.fs
index d6b906d..0e8ea30 100644
--- a/src/LivingVillage.Desktop/WorldBootstrap.fs
+++ b/src/LivingVillage.Desktop/WorldBootstrap.fs
@@ -18,16 +18,28 @@ module WorldBootstrap =
 
     let private daylightStartTick = 6L * Sim.ticksPerDay / 24L
 
-    let initialWorldForDaylight (startAtDaylight: bool) (seed: uint64) (count: int) : World =
+    let initialWorldWithOccupation (startAtDaylight: bool) (seed: uint64) (count: int) (occupation: Occupation.State option) : World =
         if count < 0 || count > npcSpawnTiles.Length then
             invalidArg (nameof count) "Desktop bootstrap supports at most 30 NPCs."
 
         let startTick = if startAtDaylight then daylightStartTick else 0L
         let baseWorld = Sim.initialWorldN seed count
         let avatar =
-            { baseWorld.Avatar with
-                Pos = avatarSpawnPosition
-                Mind = { baseWorld.Avatar.Mind with Target = avatarSpawnPosition } }
+            let baseAvatar =
+                { baseWorld.Avatar with
+                    Pos = avatarSpawnPosition
+                    Mind = { baseWorld.Avatar.Mind with Target = avatarSpawnPosition } }
+            match occupation with
+            | None -> baseAvatar
+            | Some state ->
+                let needs = baseAvatar.Mind.Needs
+                { baseAvatar with
+                    Mind =
+                        { baseAvatar.Mind with
+                            Needs =
+                                { needs with
+                                    Money = float32 state.Profile.InitialMoney
+                                    Energy = state.Profile.InitialEnergy } } }
         let npcs =
             baseWorld.Npcs
             |> Array.mapi (fun index npc ->
@@ -40,5 +52,8 @@ module WorldBootstrap =
             Avatar = avatar
             Npcs = npcs }
 
+    let initialWorldForDaylight (startAtDaylight: bool) (seed: uint64) (count: int) : World =
+        initialWorldWithOccupation startAtDaylight seed count None
+
     let initialWorld (seed: uint64) (count: int) : World =
-        initialWorldForDaylight false seed count
+        initialWorldWithOccupation false seed count None