fix(config): sync legacy env proxy with manager

CHANGELOG.md

@@ -54,6 +54,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Edge singularity correction at PEC and lossy metal edges defaults to `True`.
 
 ### Fixed
+- Ensured the legacy `Env` proxy mirrors `config.web` profile switches and preserves API URL.
 - More robust `Sellmeier` and `Debye` material model, and prevent very large pole parameters in `PoleResidue` material model.
 - Bug in `WavePort` when more than one mode is requested in the `ModeSpec`.
 - Solver error for named 2D materials with inhomogeneous substrates.

tests/config/test_legacy_env.py

@@ -0,0 +1,71 @@
+from __future__ import annotations
+
+import os
+import ssl
+
+from tidy3d.config import Env, get_manager, reload_config
+from tidy3d.config import config as config_wrapper
+
+
+def test_env_tracks_profile_switch(config_manager):
+    """Regression: Env should mirror manager profile switches."""
+
+    del config_manager  # ensure fixture runs, avoid lint for unused variable
+    try:
+        config_wrapper.switch_profile("dev")
+        assert config_wrapper.profile == "dev"
+        assert Env.current.name == "dev"
+        assert str(Env.current.web_api_endpoint) == str(config_wrapper.web.api_endpoint)
+    finally:
+        reload_config(profile="default")
+
+
+def test_env_pending_overrides_apply_on_activation(mock_config_dir, config_manager):
+    """Queued overrides should land once the corresponding profile is activated."""
+
+    del mock_config_dir
+    manager = config_manager
+    try:
+        config_wrapper.switch_profile("default")
+        assert manager.profile == "default"
+
+        Env.dev.enable_caching = False
+        Env.dev.ssl_version = ssl.TLSVersion.TLSv1_2
+
+        # Pending overrides should not touch the active profile yet.
+        default_web = manager.get_section("web")
+        assert default_web.enable_caching is True
+        assert default_web.ssl_version is None
+
+        Env.dev.active()
+        current_manager = get_manager()
+        assert current_manager.profile == "dev"
+        dev_web = current_manager.get_section("web")
+        assert dev_web.enable_caching is False
+        assert dev_web.ssl_version == ssl.TLSVersion.TLSv1_2
+        assert Env.current.enable_caching is False
+        assert Env.current.ssl_version == ssl.TLSVersion.TLSv1_2
+    finally:
+        reload_config(profile="default")
+
+
+def test_env_vars_follow_profile_switch(mock_config_dir, monkeypatch, config_manager):
+    """Environment variables applied via Env should restore previous values on switch."""
+
+    del mock_config_dir
+    del config_manager  # ensure fixture executes without lint complaints
+    try:
+        config_wrapper.switch_profile("default")
+        monkeypatch.setenv("TIDY3D_TEST_VAR", "previous")
+
+        Env.default.env_vars = {"TIDY3D_TEST_VAR": "applied"}
+        assert os.environ["TIDY3D_TEST_VAR"] == "applied"
+
+        Env.dev.env_vars = {}
+        Env.dev.active()
+        assert os.environ["TIDY3D_TEST_VAR"] == "previous"
+
+        Env.default.active()
+        assert os.environ["TIDY3D_TEST_VAR"] == "applied"
+    finally:
+        reload_config(profile="default")

tests/config/test_web_config.py

@@ -0,0 +1,23 @@
+from __future__ import annotations
+
+from tidy3d.config.sections import WebConfig
+
+
+def test_build_api_url_joins_paths():
+    web = WebConfig(api_endpoint="https://example.com/api")
+    assert web.build_api_url("v1/tasks") == "https://example.com/api/v1/tasks"
+
+
+def test_build_api_url_strips_leading_slashes():
+    web = WebConfig(api_endpoint="https://example.com/api/")
+    assert web.build_api_url("/v1/tasks") == "https://example.com/api/v1/tasks"
+
+
+def test_build_api_url_returns_base_for_empty_path():
+    web = WebConfig(api_endpoint="https://example.com/api")
+    assert web.build_api_url("") == "https://example.com/api"
+
+
+def test_build_api_url_without_base_returns_path():
+    web = WebConfig.model_construct(api_endpoint="")
+    assert web.build_api_url("/v1/tasks") == "v1/tasks"