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/en/lite-tasks.json

@@ -20,7 +20,23 @@
     "implementation": "Implementation",
     "feasibility": "Feasibility",
     "risk": "Risk",
-    "planSummary": "Plan Summary"
+    "planSummary": "Plan Summary",
+    "round": "Round",
+    "converged": "Converged",
+    "continuing": "Continuing",
+    "needsInput": "Needs Input",
+    "userFeedback": "User Feedback Incorporated",
+    "cliExecutions": "CLI Executions",
+    "solutions": "Solutions",
+    "feasible": "Feasible",
+    "pros": "Pros",
+    "cons": "Cons",
+    "convergence": "Convergence Analysis",
+    "crossVerification": "Cross Verification",
+    "agreements": "Agreements",
+    "disagreements": "Disagreements",
+    "resolution": "Resolution",
+    "clarificationQuestions": "Clarification Questions"
   },
   "createdAt": "Created",
   "rounds": "rounds",