protocol: report session permission profiles (#18282)

## Why

Clients that observe `SessionConfigured` need the same canonical
permission view that app-server thread responses provide. Reporting the
profile in protocol events lets clients keep their local state
synchronized without reinterpreting legacy sandbox fields.

## What changed

This adds `permission_profile` to `SessionConfigured` and propagates it
through core, exec JSON output, MCP server messages, and TUI
history/widget handling.

## Verification

- `cargo test -p codex-tui permissions -- --nocapture`
- `cargo test -p codex-core --test all permissions_messages --
--nocapture`















































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[//]: # (BEGIN SAPLING FOOTER)
Stack created with [Sapling](https://sapling-scm.com). Best reviewed
with [ReviewStack](https://reviewstack.dev/openai/codex/pull/18282).
* #18288
* #18287
* #18286
* #18285
* #18284
* #18283
* __->__ #18282

codex-rs/exec/src/lib.rs

@@ -76,6 +76,7 @@ use codex_model_provider_info::OLLAMA_OSS_PROVIDER_ID;
 use codex_otel::set_parent_from_context;
 use codex_otel::traceparent_context_from_env;
 use codex_protocol::config_types::SandboxMode;
+use codex_protocol::models::PermissionProfile;
 use codex_protocol::protocol::AskForApproval;
 use codex_protocol::protocol::ReviewRequest;
 use codex_protocol::protocol::ReviewTarget;
@@ -1024,6 +1025,7 @@ fn session_configured_from_thread_start_response(
         response.approval_policy.to_core(),
         response.approvals_reviewer.to_core(),
         response.sandbox.to_core(),
+        response.permission_profile.clone().map(Into::into),
         response.cwd.clone(),
         response.reasoning_effort,
     )
@@ -1042,6 +1044,7 @@ fn session_configured_from_thread_resume_response(
         response.approval_policy.to_core(),
         response.approvals_reviewer.to_core(),
         response.sandbox.to_core(),
+        response.permission_profile.clone().map(Into::into),
         response.cwd.clone(),
         response.reasoning_effort,
     )
@@ -1070,6 +1073,7 @@ fn session_configured_from_thread_response(
     approval_policy: AskForApproval,
     approvals_reviewer: codex_protocol::config_types::ApprovalsReviewer,
     sandbox_policy: SandboxPolicy,
+    permission_profile: Option<PermissionProfile>,
     cwd: AbsolutePathBuf,
     reasoning_effort: Option<codex_protocol::openai_models::ReasoningEffort>,
 ) -> Result<SessionConfiguredEvent, String> {
@@ -1086,6 +1090,7 @@ fn session_configured_from_thread_response(
         approval_policy,
         approvals_reviewer,
         sandbox_policy,
+        permission_profile,
         cwd,
         reasoning_effort,
         history_log_id: 0,