fix(server): session unique index conflict (#12865)

packages/backend/server/src/plugins/copilot/prompt/prompts.ts

@@ -1880,5 +1880,14 @@ export async function refreshPrompts(db: PrismaClient) {
         },
       },
     });
+
+    await db.aiSession.updateMany({
+      where: {
+        promptName: prompt.name,
+      },
+      data: {
+        promptAction: prompt.action ?? null,
+      },
+    });
   }
 }

packages/backend/server/src/plugins/copilot/session.ts

@@ -257,6 +257,7 @@ export class ChatSessionService {
         ...state,
         sessionId,
         promptName: state.prompt.name,
+        promptAction: state.prompt.action ?? null,
       });
     }
 
@@ -615,7 +616,7 @@ export class ChatSessionService {
 
       await tx.aiSession.updateMany({
         where: { id: { in: actionIds } },
-        data: { deletedAt: new Date() },
+        data: { pinned: false, deletedAt: new Date() },
       });
 
       return [...sessionIds, ...actionIds];