feat: Add detailed discussion content rendering for multi-cli-plan

- Add RoundDetailCard component to display synthesis details per round:
  - CLI execution status and duration
  - Solutions with feasibility, effort, risk, pros/cons
  - Convergence analysis with score and rationale
  - Cross-verification showing agreements and disagreements
  - Clarification questions
- Update ExpandedMultiCliPanel discussion tab to use new component
- Add i18n translations for new discussion content labels

ccw/frontend/src/locales/zh/lite-tasks.json

@@ -20,7 +20,23 @@
     "implementation": "实现方式",
     "feasibility": "可行性",
     "risk": "风险",
-    "planSummary": "规划摘要"
+    "planSummary": "规划摘要",
+    "round": "轮",
+    "converged": "已收敛",
+    "continuing": "继续中",
+    "needsInput": "需要输入",
+    "userFeedback": "已纳入用户反馈",
+    "cliExecutions": "CLI 执行",
+    "solutions": "解决方案",
+    "feasible": "可行",
+    "pros": "优点",
+    "cons": "缺点",
+    "convergence": "收敛分析",
+    "crossVerification": "交叉验证",
+    "agreements": "共识",
+    "disagreements": "分歧",
+    "resolution": "解决方式",
+    "clarificationQuestions": "澄清问题"
   },
   "createdAt": "创建时间",
   "rounds": "轮",