fix: close PI-140 cutover gaps

Back up unknown legacy Agents, reconnect settled Conversation observation, remove remaining active repository residue, and restore the bundled Python verifier import.

src/stores/coding-conversations.ts

@@ -7,6 +7,7 @@ import {
   type ConversationReducerState,
 } from '../../shared/coding-conversation-reducer';
 import { AppError } from '@/lib/error-model';
+import { queueCodingConversationSessionSync } from '@/lib/agent-session-sync';
 import {
   getCodingConversationSnapshot,
   openCodingConversationEvents,
@@ -55,6 +56,7 @@ interface CodingConversationStoreDependencies {
   openEvents(conversationId?: string): Promise<EventSource>;
   submitPrompt(input: SubmitCodingConversationPromptInput): Promise<PromptAcceptance>;
   recover(conversationId: string): Promise<void>;
+  queueSettledSessionSync(snapshot: ConversationSnapshot): void;
   createId(kind: 'request' | 'node'): string;
   preparationTimeoutMs: number;
 }
@@ -277,6 +279,7 @@ function defaultDependencies(): CodingConversationStoreDependencies {
     openEvents: openCodingConversationEvents,
     submitPrompt: submitCodingConversationPrompt,
     recover: recoverCodingConversation,
+    queueSettledSessionSync: queueCodingConversationSessionSync,
     createId: () => crypto.randomUUID(),
     preparationTimeoutMs: 10_000,
   };
@@ -332,6 +335,26 @@ function validPatchBatchRange(event: CodingConversationPatchBatchEvent): boolean
   ));
 }
 
+function completesOrdinaryPrompt(
+  event: CodingConversationPatchBatchEvent,
+  current: ConversationSnapshot,
+): boolean {
+  let mode = current.run.mode;
+  let observedActiveRun = current.run.status !== 'idle';
+  for (const item of event.items) {
+    if (item.patch.op !== 'run.state') continue;
+    if (item.patch.run.mode) mode = item.patch.run.mode;
+    if (item.patch.run.status !== 'idle') observedActiveRun = true;
+    if (observedActiveRun
+      && mode === 'prompt'
+      && item.patch.run.status === 'idle'
+      && item.patch.run.terminalReason === 'completed') {
+      return true;
+    }
+  }
+  return false;
+}
+
 export function createCodingConversationStore(
   dependencies: Partial<CodingConversationStoreDependencies> = {},
 ): StoreApi<CodingConversationStoreState> {
@@ -892,7 +915,9 @@ export function createCodingConversationStore(
         }
         return;
       }
+      const shouldSyncSettledSession = completesOrdinaryPrompt(event, currentSnapshot);
       let recover = false;
+      let applied = false;
       set((state) => {
         const current = state.entriesByConversationId[event.conversationId] ?? emptyEntry();
         let reducer = current.reducer;
@@ -911,6 +936,7 @@ export function createCodingConversationStore(
           }
         }
         if (reducer === current.reducer) return state;
+        applied = true;
         const incomingMessages = event.items.flatMap((item) => (
           item.patch.op === 'message.upsert' ? [item.patch.node] : []
         ));
@@ -950,6 +976,9 @@ export function createCodingConversationStore(
       });
       if (recover) {
         void get().loadSnapshot(event.conversationId, true).catch(() => undefined);
+      } else if (applied && shouldSyncSettledSession) {
+        const settledSnapshot = selectCodingConversationSnapshot(event.conversationId)(get());
+        if (settledSnapshot) deps.queueSettledSessionSync(settledSnapshot);
       }
     },
   }));