[sung17]

Summary

Adds a Duplicate action for minigames, matching the one Mini Apps already have.

• The copy keeps the minigame's settings: type, general settings, appearance, player settings, win/lose messages, the no-prize outcome's label and image, the prize-name custom field, and the enabled state.
• Prizes are not copied. The copy starts with no prizes and nonWinning.loseRate: 100, so the 100% probability total stays valid. Until prizes are added, every play is a loss.
• Plays, players and counters (playsCount, participantsCount, winnersCount, sharesCount) start from zero.
• The copy is named <name> - Copy, or - Copy 2, - Copy 3, … when the name is taken. Long names are cut to fit the 150-character limit. Naming reuses insertWithFreeCopyName, the helper Mini Apps use, so a concurrent copy that takes a name moves on to the next free one.

Changes

• minigameService.duplicate (packages/business/src/minigame/service.ts)
• New public procedure POST /v1/minigames/{id}/duplicate (minigames.duplicate). The CLI command is chatbotx minigames duplicate <id>, added to apps/cli/README.md. It is not in the MCP default set, so apps/mcp-server/README.md is unchanged.
• Builder: new Duplicate row action in the minigames table. It opens a confirm dialog that says prizes are not copied, then opens the copy's edit page.
• i18n: minigames.duplicateDialog.* added to all 21 locale files.
• Public-spec operations snapshot updated for the new operation.

Testing

• packages/business/__tests__/minigame-duplicate.test.ts (6 cases: copied fields with prizes stripped, free-name pick, retry after a concurrent copy, name conflict, long-name cut, not found)
• minigame-service-update.test.ts still passes
• public-spec-operations / public-spec-mcp tests
• CLI tests (command-name collision check)
• pnpm lint, check-types for business and builder
• Manual UI check: duplicate a jackpot minigame from the list, confirm the copy has no prizes and lose rate is 100%

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