fix(session): preserve time_updated on project_id migration

packages/opencode/src/project/project.ts

@@ -315,7 +315,7 @@ export const layer = Layer.effect(
         yield* db((d) =>
           d
             .update(SessionTable)
-            .set({ project_id: projectID })
+            .set({ project_id: projectID, time_updated: sql`${SessionTable.time_updated}` })
             .where(and(eq(SessionTable.project_id, ProjectID.global), eq(SessionTable.directory, data.directory)))
             .run(),
         )

packages/opencode/test/project/migrate-global.test.ts

@@ -104,13 +104,23 @@ describe("migrateFromGlobal", () => {
       const id = legacySessionID()
       yield* Effect.sync(() => seed({ id, dir: tmp, project: ProjectID.global }))
 
+      // Capture the original time_updated so we can verify migration
+      // does not corrupt it. Regression test for #25392 — without the
+      // preserve clause, Drizzle's $onUpdate hook bumps time_updated to
+      // Date.now() on every startup, scrambling the /sessions timeline.
+      const before = Database.use((db) => db.select().from(SessionTable).where(eq(SessionTable.id, id)).get())
+      expect(before).toBeDefined()
+      const originalTimeUpdated = before!.time_updated
+
       // 4. Call fromDirectory again — project row already exists,
       //    so the current code skips migration entirely. This is the bug.
       yield* projects.fromDirectory(tmp)
 
       const row = Database.use((db) => db.select().from(SessionTable).where(eq(SessionTable.id, id)).get())
       expect(row).toBeDefined()
       expect(row!.project_id).toBe(project.id)
+      // time_updated must be preserved across the project_id rewrite.
+      expect(row!.time_updated).toBe(originalTimeUpdated)
     }),
   )