refactor(effect): upgrade opencode to beta.46 context APIs (#21977)

packages/opencode/src/session/summary.ts

@@ -1,5 +1,5 @@
 import z from "zod"
-import { Effect, Layer, ServiceMap } from "effect"
+import { Effect, Layer, Context } from "effect"
 import { makeRuntime } from "@/effect/run-service"
 import { Bus } from "@/bus"
 import { Snapshot } from "@/snapshot"
@@ -71,7 +71,7 @@ export namespace SessionSummary {
     readonly computeDiff: (input: { messages: MessageV2.WithParts[] }) => Effect.Effect<Snapshot.FileDiff[]>
   }
 
-  export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/SessionSummary") {}
+  export class Service extends Context.Service<Service, Interface>()("@opencode/SessionSummary") {}
 
   export const layer = Layer.effect(
     Service,