Fix session migration: cache SDK sessions to localStorage for auto-import on native mode startup

packages/ui/src/stores/session-api.ts

@@ -3,7 +3,7 @@ import type { Message } from "../types/message"
 
 import { instances } from "./instances"
 import { nativeSessionApi } from "../lib/lite-mode"
-import { needsMigration, migrateSessionsToNative, markMigrated, getExistingSdkSessions } from "./session-migration"
+import { needsMigration, autoImportCachedSessions, markMigrated, cacheSDKSessions } from "./session-migration"
 import { preferences, setAgentModelPreference, getAgentModelPreference } from "./preferences"
 import { setSessionCompactionState } from "./session-compaction"
 import {
@@ -390,23 +390,16 @@ async function fetchSessions(instanceId: string): Promise<void> {
     let responseData: any[] = []
 
     if (isNative) {
-      // Check if we need to migrate sessions from SDK mode
+      // Auto-import cached SDK sessions on native mode startup
       if (needsMigration(instanceId)) {
-        const existingSdkSessions = getExistingSdkSessions(instanceId)
-        if (existingSdkSessions.length > 0) {
-          log.info({ instanceId, count: existingSdkSessions.length }, "Migrating SDK sessions to native mode")
-          const migrationData = existingSdkSessions.map(s => ({
-            id: s.id,
-            title: s.title,
-            parentId: s.parentId,
-            time: s.time,
-            model: s.model,
-            agent: s.agent
-          }))
-          const result = await migrateSessionsToNative(instanceId, migrationData)
-          log.info({ instanceId, result }, "Migration completed")
-        } else {
-          markMigrated(instanceId)
+        try {
+          const result = await autoImportCachedSessions(instanceId)
+          if (result.imported > 0) {
+            log.info({ instanceId, result }, "Auto-imported SDK sessions to native mode")
+          }
+        } catch (error) {
+          log.error({ instanceId, error }, "Failed to auto-import SDK sessions")
+          markMigrated(instanceId) // Mark as migrated to prevent repeated failures
         }
       }
 
@@ -488,6 +481,12 @@ async function fetchSessions(instanceId: string): Promise<void> {
       return next
     })
 
+    // Cache SDK sessions to localStorage for later migration to native mode
+    if (!isNative && sessionMap.size > 0) {
+      cacheSDKSessions(instanceId, Array.from(sessionMap.values()))
+    }
+
+
     setMessagesLoaded((prev) => {
       const next = new Map(prev)
       const loadedSet = next.get(instanceId)