app-server: drop legacy profile config surface (#24067)

## Why

Legacy `[profiles.<name>]` config tables and the legacy `profile`
selector are being retired in favor of profile files selected with
`--profile <name>`. After #23886 removed the CLI-side legacy profile
plumbing, the app-server config surface still exposed those fields and
still carried conversion code for the old protocol shape.

## What changed

- Remove `profile`, `profiles`, and `ProfileV2` from the app-server
config protocol/schema output so `config/read` no longer returns legacy
profile config.
- Drop the old v1 `UserSavedConfig` profile conversion path from
`config`.
- Reject new app-server config writes under `profiles.*` with the same
migration direction used for `profile`, while still allowing callers to
clear existing legacy profile tables.
- Refresh app-server config coverage and the experimental API README
example around the remaining `Config` nesting path.

## Verification

- Added config-manager coverage that `config/read` omits legacy profile
config, `profiles.*` writes are rejected, and existing legacy profile
tables can still be cleared.
- Updated the v2 config RPC test to cover the rejected `profiles.*`
batch-write path.

codex-rs/config/src/config_toml.rs

@@ -27,9 +27,6 @@ use crate::types::ToolSuggestConfig;
 use crate::types::Tui;
 use crate::types::UriBasedFileOpener;
 use crate::types::WindowsToml;
-use codex_app_server_protocol::ForcedChatgptWorkspaceIds as ApiForcedChatgptWorkspaceIds;
-use codex_app_server_protocol::Tools;
-use codex_app_server_protocol::UserSavedConfig;
 use codex_features::FeaturesToml;
 use codex_model_provider_info::AMAZON_BEDROCK_PROVIDER_ID;
 use codex_model_provider_info::LEGACY_OLLAMA_CHAT_PROVIDER_ID;
@@ -105,13 +102,6 @@ impl ForcedChatgptWorkspaceIds {
             Self::Multiple(values) => values,
         }
     }
-
-    pub fn into_api(self) -> ApiForcedChatgptWorkspaceIds {
-        match self {
-            Self::Single(value) => ApiForcedChatgptWorkspaceIds::Single(value),
-            Self::Multiple(values) => ApiForcedChatgptWorkspaceIds::Multiple(values),
-        }
-    }
 }
 
 impl<'de> Deserialize<'de> for ForcedChatgptWorkspaceIds {
@@ -553,33 +543,6 @@ pub struct AutoReviewToml {
     pub policy: Option<String>,
 }
 
-impl From<ConfigToml> for UserSavedConfig {
-    fn from(config_toml: ConfigToml) -> Self {
-        let profiles = config_toml
-            .profiles
-            .into_iter()
-            .map(|(k, v)| (k, v.into()))
-            .collect();
-
-        Self {
-            approval_policy: config_toml.approval_policy,
-            sandbox_mode: config_toml.sandbox_mode,
-            sandbox_settings: config_toml.sandbox_workspace_write.map(From::from),
-            forced_chatgpt_workspace_id: config_toml
-                .forced_chatgpt_workspace_id
-                .map(ForcedChatgptWorkspaceIds::into_api),
-            forced_login_method: config_toml.forced_login_method,
-            model: config_toml.model,
-            model_reasoning_effort: config_toml.model_reasoning_effort,
-            model_reasoning_summary: config_toml.model_reasoning_summary,
-            model_verbosity: config_toml.model_verbosity,
-            tools: config_toml.tools.map(From::from),
-            profile: config_toml.profile,
-            profiles,
-        }
-    }
-}
-
 #[derive(Serialize, Deserialize, Debug, Clone, PartialEq, Eq, JsonSchema)]
 #[schemars(deny_unknown_fields)]
 pub struct ProjectConfig {
@@ -730,14 +693,6 @@ pub struct AgentRoleToml {
     pub nickname_candidates: Option<Vec<String>>,
 }
 
-impl From<ToolsToml> for Tools {
-    fn from(tools_toml: ToolsToml) -> Self {
-        Self {
-            web_search: tools_toml.web_search.is_some().then_some(true),
-        }
-    }
-}
-
 #[derive(Serialize, Deserialize, Debug, Clone, Default, PartialEq, Eq, JsonSchema)]
 #[schemars(deny_unknown_fields)]
 pub struct GhostSnapshotToml {

codex-rs/config/src/profile_toml.rs

@@ -81,17 +81,3 @@ pub struct ProfileTui {
     #[serde(default)]
     pub session_picker_view: Option<SessionPickerViewMode>,
 }
-
-impl From<ConfigProfile> for codex_app_server_protocol::Profile {
-    fn from(config_profile: ConfigProfile) -> Self {
-        Self {
-            model: config_profile.model,
-            model_provider: config_profile.model_provider,
-            approval_policy: config_profile.approval_policy,
-            model_reasoning_effort: config_profile.model_reasoning_effort,
-            model_reasoning_summary: config_profile.model_reasoning_summary,
-            model_verbosity: config_profile.model_verbosity,
-            chatgpt_base_url: config_profile.chatgpt_base_url,
-        }
-    }
-}