feat(遊戲化): 新增大廳、附身、時間流、後日談進度等遊戲化系統功能

新增角色大廳（lobby）邀約與通話、附身（possession）、時鐘（clock）抽象、
時間流與睡眠負債、後日談進度、行為選擇與旁觀反應等模組，並補齊對應冒煙
測試（R~V）與單元測試；同步調整 web/mobile 對應頁面與元件。

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/api/src/romance/confession.service.ts

@@ -3,6 +3,7 @@ import { PrismaService } from "../prisma/prisma.service.js";
 import { EmotionService, dominantState } from "../emotion/emotion.service.js";
 import { RomanceService } from "./romance.service.js";
 import { RomanceEligibilityService } from "./romance-eligibility.service.js";
+import { isOutsideSoloRoom } from "./room-context-guard.js";
 import {
   CONFESSION_METER_THRESHOLD,
   AWKWARD_PERIOD_DAYS,
@@ -37,7 +38,12 @@ export class ConfessionService {
     private readonly emotion: EmotionService,
   ) {}
 
-  async confess(characterId: string, userId: string, now: Date = new Date()): Promise<ConfessionResult> {
+  async confess(characterId: string, userId: string, now: Date = new Date(), roomId?: string): Promise<ConfessionResult> {
+    // T42：房型已轉為 GROUP／LOBBY／SELF_CHAT 時，告白一律不可用——不消耗嘗試次數、不記錄拒絕。
+    if (await isOutsideSoloRoom(this.prisma, roomId)) {
+      return { outcome: "INELIGIBLE", romanceMeter: 0, consecutiveRejections: 0 };
+    }
+
     const eligible = await this.eligibility.getEligibility(characterId);
     if (!eligible.romanceAxisEligible) {
       return { outcome: "INELIGIBLE", romanceMeter: 0, consecutiveRejections: 0 };