AGC 发布面板接入买断制定价并抽取共享定价组件

packages/shared/src/components：新增 PlatformGamePricingField（.tsx/.css/.test.tsx）与 platformGamePricingModel（上限常量与解析），并从 components/index.ts 导出；组件只表达付费方式单选、买断价输入、上限提示、禁用态与错误行，校验由使用方持有。
src/components/common/PlatformGamePricingField.tsx：按既有的 common 适配约定新增网页端再导出。
src/components/game-distribution/GamePublishPage.tsx：把内联的付费方式 fieldset 与买断价输入替换为共享组件，文案、校验、禁用逻辑与既有用例保持不变。
src/components/game-distribution/gamePublishMetadata.ts：买断价上限与解析改为复用共享常量与共享函数，不再各写一份。
apps/ai-game-creator-shell/src/components/game-distribution/GameDistributionPublishPanel.tsx：首次发布与更新两条路径都加入共享定价组件，默认免费；提交前本地校验并透传价格。
apps/ai-game-creator-shell/src/services/gameDistributionPublish.ts：发布命令载荷透传 priceMudPoints，并做 0..=1000000 兜底校验；发布草稿回读新增 priceMudPoints 字段。
apps/ai-game-creator-shell/src-tauri/src/game_distribution_publish.rs：Tauri 命令新增可选 price_mud_points（旧前端不传按免费，向后兼容）并替换硬编码的 0；回读作者作品时解析 priceMudPoints，按「最近版本冻结价优先、回退游戏行当前价」预填，避免已上线付费作品被静默改成免费；发布摘要纳入价格，只改价格也会换幂等键，不会重放上一次收据。
apps/ai-game-creator-shell/tests：补充买断价透传、本地校验拦截、更新模式价格预填与免费兜底用例。
packages/shared/src/components/PlatformGamePricingField.test.tsx：覆盖免费/买断制切换、价格输入、上限提示、禁用态与错误行。

src/components/common/PlatformGamePricingField.tsx

@@ -0,0 +1,2 @@
+export type { PlatformGamePricingFieldProps } from '@genarrative/shared/components';
+export { PlatformGamePricingField } from '@genarrative/shared/components';

src/components/game-distribution/GamePublishPage.tsx

@@ -20,6 +20,7 @@ import {
 } from '../../services/gameDistributionClient';
 import { useAuthUi } from '../auth/AuthUiContext';
 import { PlatformActionButton } from '../common/PlatformActionButton';
+import { PlatformGamePricingField } from '../common/PlatformGamePricingField';
 import { PlatformStatusMessage } from '../common/PlatformStatusMessage';
 import {
   GAME_METADATA_CATEGORIES,
@@ -40,7 +41,6 @@ import { applyVersionMediaDefaults } from './gamePublishMediaDefaults';
 import { GamePublishMediaFieldset } from './GamePublishMediaFieldset';
 import {
   type GamePublishPriceMode,
-  MAX_GAME_PRICE_MUD_POINTS,
   resolveGamePublishPriceMudPoints,
   resolvePublishMetadataError,
 } from './gamePublishMetadata';
@@ -804,45 +804,13 @@ export function GamePublishPage({
             </label>
           ))}
         </fieldset>
-        <fieldset className="game-publish-fieldset">
-          <legend>付费方式</legend>
-          <label className="game-publish-checkbox">
-            <input
-              type="radio"
-              name="game-price-mode"
-              checked={priceMode === 'free'}
-              disabled={isResumingDraft}
-              onChange={() => setPriceMode('free')}
-            />
-            免费
-          </label>
-          <label className="game-publish-checkbox">
-            <input
-              type="radio"
-              name="game-price-mode"
-              checked={priceMode === 'paid'}
-              disabled={isResumingDraft}
-              onChange={() => setPriceMode('paid')}
-            />
-            买断制
-          </label>
-        </fieldset>
-        {priceMode === 'paid' ? (
-          <label className="game-publish-field">
-            买断价（泥点）
-            <input
-              type="number"
-              inputMode="numeric"
-              value={priceInput}
-              disabled={isResumingDraft}
-              onChange={(event) => setPriceInput(event.target.value)}
-            />
-            <span className="game-publish-hint">
-              买断一次永久拥有；价格随本次版本审核通过后生效，最多{' '}
-              {MAX_GAME_PRICE_MUD_POINTS} 泥点
-            </span>
-          </label>
-        ) : null}
+        <PlatformGamePricingField
+          mode={priceMode}
+          priceInput={priceInput}
+          disabled={isResumingDraft}
+          onModeChange={setPriceMode}
+          onPriceInputChange={setPriceInput}
+        />
         <GamePublishMediaFieldset
           cover={coverAsset}
           screenshots={screenshotAssets}

src/components/game-distribution/gamePublishMetadata.ts

@@ -1,39 +1,24 @@
+import {
+  PLATFORM_GAME_MAX_PRICE_MUD_POINTS,
+  type PlatformGamePricingMode,
+  resolvePlatformGamePriceMudPoints,
+} from '../../../packages/shared/src/components/platformGamePricingModel';
 import type { GameDistributionDeviceSupport } from '../../../packages/shared/src/contracts/gameDistribution';
 import { MAX_GAME_SCREENSHOTS } from './gamePublishAssets';
 
-/** 买断价上限，与服务端 `MAX_GAME_PRICE_MUD_POINTS` 保持一致。 */
-export const MAX_GAME_PRICE_MUD_POINTS = 1_000_000;
+/** 买断价上限，复用共享定价组件常量，网页与 AGC 及服务端保持同一口径。 */
+export const MAX_GAME_PRICE_MUD_POINTS = PLATFORM_GAME_MAX_PRICE_MUD_POINTS;
 
-export type GamePublishPriceMode = 'free' | 'paid';
+export type GamePublishPriceMode = PlatformGamePricingMode;
 
 /**
  * 解析发布表单的付费方式与买断价输入。
  *
  * 口径与服务端一致：免费等价于 `0`；买断制必须是 `1..=1_000_000` 的整数泥点。
- * 返回的 `error` 为空字符串表示可用，否则 `priceMudPoints` 无意义。
+ * 实现落在共享 `platformGamePricingModel`，网页与 AGC 发布面板共用同一份校验。
  */
-export function resolveGamePublishPriceMudPoints(
-  mode: GamePublishPriceMode,
-  rawValue: string,
-): { priceMudPoints: number; error: string } {
-  if (mode === 'free') return { priceMudPoints: 0, error: '' };
-  const value = rawValue.trim();
-  if (!/^\d+$/u.test(value)) {
-    return { priceMudPoints: 0, error: '买断价必须是整数泥点' };
-  }
-  const priceMudPoints = Number(value);
-  if (
-    !Number.isSafeInteger(priceMudPoints) ||
-    priceMudPoints < 1 ||
-    priceMudPoints > MAX_GAME_PRICE_MUD_POINTS
-  ) {
-    return {
-      priceMudPoints: 0,
-      error: `买断价必须是 1 到 ${MAX_GAME_PRICE_MUD_POINTS} 之间的整数泥点`,
-    };
-  }
-  return { priceMudPoints, error: '' };
-}
+export const resolveGamePublishPriceMudPoints =
+  resolvePlatformGamePriceMudPoints;
 
 /** 作者侧元数据校验；口径与服务端 `validate_game_metadata` 保持一致。 */
 export function resolvePublishMetadataError(input: {