core: migrate permission system to new PermissionNext API

Replaces legacy Permission.respond with PermissionNext.reply for better async handling and updates server endpoints to use the new permission system. Improves error handling in session processor to work with both old and new permission rejection types.

packages/opencode/src/session/processor.ts

@@ -3,7 +3,6 @@ import { Log } from "@/util/log"
 import { Identifier } from "@/id/id"
 import { Session } from "."
 import { Agent } from "@/agent/agent"
-import { Permission } from "@/permission"
 import { Snapshot } from "@/snapshot"
 import { SessionSummary } from "./summary"
 import { Bus } from "@/bus"
@@ -202,11 +201,6 @@ export namespace SessionProcessor {
                         status: "error",
                         input: value.input,
                         error: (value.error as any).toString(),
-                        metadata:
-                          value.error instanceof Permission.RejectedError ||
-                          value.error instanceof Permission.RejectedError
-                            ? value.error.metadata
-                            : undefined,
                         time: {
                           start: match.state.time.start,
                           end: Date.now(),
@@ -214,10 +208,7 @@ export namespace SessionProcessor {
                       },
                     })
 
-                    if (
-                      value.error instanceof Permission.RejectedError ||
-                      value.error instanceof PermissionNext.RejectedError
-                    ) {
+                    if (value.error instanceof PermissionNext.RejectedError) {
                       blocked = shouldBreak
                     }
                     delete toolcalls[value.toolCallId]