feat(codex): 增强 OAuth 导入解析与账号信息提取，优化维护调度器线程模型

Codex OAuth:
- 导入解析支持附加账号字段（account_id/plan_type/user_id/email）
- enrich_codex 扩展从 access_token 和直接字段提取账号信息
- parse_codex_id_token 支持 JWT/JSON 字符串/dict 三种输入格式
- request patching 新增 openai:compact 格式支持
- codex_usage_parser 新增 credits_unlimited 字段解析

维护调度器:
- 同步 DB 操作迁移到线程池执行，避免阻塞事件循环
- 新增 request_candidates 定期清理任务
- 新增每周 VACUUM ANALYZE 数据库表维护任务
- 新增 enable_db_maintenance 配置项

前端:
- ElapsedTimeText 从 setInterval 改为 requestAnimationFrame
- 时间线过滤 available/unused 占位记录
- Usage 页面默认关闭全局自动刷新
- 移除号池管理中的配额更新时间显示

tests/services/test_codex_request.py

@@ -1,5 +1,8 @@
 from __future__ import annotations
 
+import jwt
+import pytest
+
 from src.services.provider.adapters.codex.request_patching import (
     maybe_patch_request_for_codex,
     patch_openai_cli_request_for_codex,
@@ -143,3 +146,37 @@ def test_codex_envelope_extra_headers_uses_account_id_header() -> None:
     headers = codex_oauth_envelope.extra_headers() or {}
     assert headers.get("Chatgpt-Account-Id") == "acc_123"
     set_codex_request_context(None)
+
+
+def _encode_unsigned_jwt(payload: dict[str, object]) -> str:
+    token = jwt.encode(payload, key="", algorithm="none")
+    return token.decode("utf-8") if isinstance(token, bytes) else token
+
+
+@pytest.mark.asyncio
+async def test_enrich_codex_uses_access_token_when_id_token_missing() -> None:
+    from src.services.provider.adapters.codex.plugin import enrich_codex
+
+    access_token = _encode_unsigned_jwt(
+        {
+            "email": "[email protected]",
+            "https://api.openai.com/auth": {
+                "chatgpt_account_id": "acc-access",
+                "chatgpt_plan_type": "team",
+                "chatgpt_user_id": "user-access",
+            },
+        }
+    )
+
+    auth_config: dict[str, object] = {}
+    out = await enrich_codex(
+        auth_config=auth_config,
+        token_response={"access_token": access_token},
+        access_token=access_token,
+        proxy_config=None,
+    )
+
+    assert out["email"] == "[email protected]"
+    assert out["account_id"] == "acc-access"
+    assert out["plan_type"] == "team"
+    assert out["user_id"] == "user-access"

tests/services/test_provider_keys_quota_refresh_strategies.py

@@ -417,6 +417,31 @@ def test_parse_codex_usage_missing_plan_type_infers_paid_windows() -> None:
     assert parsed["secondary_window_minutes"] == 300
 
 
+def test_parse_codex_usage_blank_credits_balance_is_ignored() -> None:
+    parsed = parse_codex_wham_usage_response(
+        {
+            "plan_type": "team",
+            "rate_limit": {
+                "primary_window": {
+                    "used_percent": 10,
+                    "reset_after_seconds": 100,
+                    "reset_at": 1700000000,
+                    "limit_window_seconds": 18000,
+                }
+            },
+            "credits": {
+                "has_credits": False,
+                "balance": "",
+                "unlimited": "false",
+            },
+        }
+    )
+    assert parsed is not None
+    assert parsed["has_credits"] is False
+    assert parsed["credits_unlimited"] is False
+    assert "credits_balance" not in parsed
+
+
 def test_parse_codex_usage_invalid_type_raises_diagnostic_error() -> None:
     with pytest.raises(CodexUsageParseError, match="rate_limit.primary_window 类型错误"):
         parse_codex_wham_usage_response({"rate_limit": {"primary_window": []}})