v0.1.0: 仙途家族志 · Chronicle of the Immortal Clan

家族模拟器首版：修仙/经营/战斗/外交/叙事全套系统
- Electron + React + TS + MetonaSqlark(aria+OPFS)
- 水墨中国风 UI
- 引擎种子随机、确定性可回放
- 19 项单元测试、端到端冒烟验证

src/renderer/game/engine/market.ts

@@ -0,0 +1,48 @@
+import { World } from './world'
+import { ITEMS } from '../data/items'
+
+export function marketPrice(w: World, itemId: string): number {
+  const base = ITEMS[itemId]?.basePrice ?? 1
+  const fam = w.state.family
+  const mult = typeof fam.flag['priceMult'] === 'number' ? (fam.flag['priceMult'] as number) : 1
+  const mood = fam.reputation >= 40 ? 1.06 : fam.reputation >= 20 ? 1.02 : 0.98
+  return Math.max(1, Math.round(base * mult * mood))
+}
+
+export function buyItem(w: World, itemId: string, count: number): boolean {
+  const fam = w.state.family
+  const total = marketPrice(w, itemId) * count
+  if (total > fam.stones) return false
+  fam.stones -= total
+  fam.inventory[itemId] = (fam.inventory[itemId] ?? 0) + count
+  return true
+}
+
+export function sellItem(w: World, itemId: string, count: number): boolean {
+  const fam = w.state.family
+  const have = fam.inventory[itemId] ?? 0
+  if (have < count) return false
+  fam.inventory[itemId] = have - count
+  fam.stones += marketPrice(w, itemId) * count
+  return true
+}
+
+export function buyTechnique(w: World, techId: string, price: number): boolean {
+  const fam = w.state.family
+  if (fam.techniques.includes(techId)) return false
+  if (fam.stones < price) return false
+  fam.stones -= price
+  fam.techniques.push(techId)
+  return true
+}
+
+export function techniquePrice(techId: string): number {
+  const grade = TECH_GRADE_BASE[techId] ?? 200
+  return grade
+}
+
+import { TECHNIQUES } from '../data/techniques'
+
+const TECH_GRADE_BASE: Record<string, number> = Object.fromEntries(
+  TECHNIQUES.map((t) => [t.id, [120, 300, 700, 1600, 3600][t.grade] ?? 300])
+)