Rework debate prompts, add turn-based rounds and self-elimination convergence

- Round 1 parallel (form positions), Round 2+ sequential turn-based (each model
  sees current round's prior responses before speaking)
- Prompts treat user question as open-ended, not as a debate proposition — models
  form their own thesis in Round 1 then defend it
- Structured opposition: each model defends own unique position, not FOR/AGAINST
- Self-convergence: each model judges if convinced after each round, eliminated
  models drop out, last one standing wins and provides final summary
- Skip convergence/judge checks on Round 1 (still forming positions)
- Auto-save now triggers on councilData/debateData updates so intermediate rounds
  persist across page refresh

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/frontend/src/store/flowStore.ts b/frontend/src/store/flowStore.ts
index c1c8b99..5bb3e22 100644
--- a/frontend/src/store/flowStore.ts
+++ b/frontend/src/store/flowStore.ts
@@ -95,7 +95,7 @@ export interface DebateRound {
   round: number;
   responses: Array<{ model: string; response: string }>;
   judgeDecision?: { continue: boolean; reasoning: string };
-  converged?: boolean;
+  eliminated?: Array<{ model: string; convincedBy: string | null; reasoning: string }>;
 }
 
 export interface DebateData {
@@ -1063,7 +1063,8 @@ const useFlowStore = create<FlowState>((set, get) => {
     }
     
     // Trigger auto-save for important changes (not just userPrompt typing)
-    if (data.response !== undefined || data.status !== undefined || data.attachedFileIds !== undefined) {
+    if (data.response !== undefined || data.status !== undefined || data.attachedFileIds !== undefined
+        || data.councilData !== undefined || data.debateData !== undefined) {
       get().triggerAutoSave();
     }
   },