fix(thread): make wait-state side effects atomic

src/main/database-base.ts

@@ -82,6 +82,8 @@ export class AppDatabaseBase {
   readonly appVersion: string;
   readonly vault: SecretVault;
   protected db: DatabaseSync;
+  private transactionDepth = 0;
+  private savepointCounter = 0;
 
   public readonly core: AppDatabaseCoreModules;
   public readonly automation: AppDatabaseAutomationModules;
@@ -362,7 +364,26 @@ export class AppDatabaseBase {
   }
 
   protected transaction<T>(operation: () => T): T {
+    if (this.transactionDepth > 0) {
+      const savepoint = `agentcompany_tx_${this.savepointCounter}`;
+      this.savepointCounter += 1;
+      this.db.exec(`SAVEPOINT ${savepoint}`);
+      this.transactionDepth += 1;
+      try {
+        const result = operation();
+        this.db.exec(`RELEASE SAVEPOINT ${savepoint}`);
+        return result;
+      } catch (error) {
+        this.db.exec(`ROLLBACK TO SAVEPOINT ${savepoint}`);
+        this.db.exec(`RELEASE SAVEPOINT ${savepoint}`);
+        throw error;
+      } finally {
+        this.transactionDepth -= 1;
+      }
+    }
+
     this.db.exec("BEGIN IMMEDIATE");
+    this.transactionDepth += 1;
     try {
       const result = operation();
       this.db.exec("COMMIT");
@@ -370,6 +391,8 @@ export class AppDatabaseBase {
     } catch (error) {
       this.db.exec("ROLLBACK");
       throw error;
+    } finally {
+      this.transactionDepth -= 1;
     }
   }