feat(codex): route native ChatGPT sessions through proxy takeover

Allow the built-in Codex official provider to participate in takeover mode while preserving Codex's native OAuth or API-key credentials instead of persisting them into provider records.

Project official routing into a dedicated TOML provider, normalize inline tables, clean stale managed placeholders, and fail closed when the live configuration cannot be transformed safely.

Validate forwarded authorization, make official 401/403 responses non-retryable, avoid circuit-breaker pollution, and share the first-party ChatGPT endpoint across the Codex and Claude adapters.

src-tauri/src/database/dao/providers_seed.rs

@@ -11,6 +11,7 @@
 use crate::app_config::AppType;
 
 pub(crate) const CLAUDE_DESKTOP_OFFICIAL_PROVIDER_ID: &str = "claude-desktop-official";
+pub(crate) const CODEX_OFFICIAL_PROVIDER_ID: &str = "codex-official";
 
 /// 单条官方供应商种子定义。
 pub(crate) struct OfficialProviderSeed {
@@ -49,7 +50,7 @@ pub(crate) const OFFICIAL_SEEDS: &[OfficialProviderSeed] = &[
         settings_config_json: r#"{"env":{}}"#,
     },
     OfficialProviderSeed {
-        id: "codex-official",
+        id: CODEX_OFFICIAL_PROVIDER_ID,
         app_type: AppType::Codex,
         name: "OpenAI Official",
         website_url: "https://chatgpt.com/codex",

src-tauri/src/database/mod.rs

@@ -32,7 +32,9 @@ mod schema;
 mod tests;
 
 // DAO 类型导出供外部使用
-pub(crate) use dao::providers_seed::{is_official_seed_id, CLAUDE_DESKTOP_OFFICIAL_PROVIDER_ID};
+pub(crate) use dao::providers_seed::{
+    is_official_seed_id, CLAUDE_DESKTOP_OFFICIAL_PROVIDER_ID, CODEX_OFFICIAL_PROVIDER_ID,
+};
 pub(crate) use dao::proxy::{
     validate_cost_multiplier, validate_pricing_source, PRICING_SOURCE_REQUEST,
     PRICING_SOURCE_RESPONSE,