feat(webui): simplify model preset settings (#5061)

tests/providers/test_custom_thinking_style.py

@@ -2,7 +2,8 @@
 
 from __future__ import annotations
 
-from nanobot.config.schema import ProviderConfig, ProvidersConfig
+from nanobot.config.schema import Config, ProviderConfig, ProvidersConfig
+from nanobot.providers.factory import provider_signature
 from nanobot.providers.registry import create_dynamic_spec
 
 
@@ -60,3 +61,50 @@ class TestCustomProviderThinkingStyle:
         assert "thinking_type" in message
         assert "enable_thinking" in message
         assert "reasoning_split" in message
+
+    def test_provider_signature_tracks_dynamic_primary_thinking_style(self) -> None:
+        before = Config.model_validate(
+            {
+                "agents": {"defaults": {"modelPreset": "primary"}},
+                "modelPresets": {
+                    "primary": {"model": "tenant-model", "provider": "tenant"},
+                },
+                "providers": {
+                    "tenant": {
+                        "apiBase": "https://example.com/v1",
+                        "thinkingStyle": "thinking_type",
+                    },
+                },
+            }
+        )
+        after = before.model_copy(deep=True)
+        after.providers.model_extra["tenant"].thinking_style = "enable_thinking"
+
+        assert provider_signature(before) != provider_signature(after)
+
+    def test_provider_signature_tracks_dynamic_fallback_thinking_style(self) -> None:
+        before = Config.model_validate(
+            {
+                "agents": {
+                    "defaults": {
+                        "modelPreset": "primary",
+                        "fallbackModels": ["fallback"],
+                    }
+                },
+                "modelPresets": {
+                    "primary": {"model": "openai/gpt-4.1", "provider": "openai"},
+                    "fallback": {"model": "tenant-model", "provider": "tenant"},
+                },
+                "providers": {
+                    "openai": {"apiKey": "sk-openai"},
+                    "tenant": {
+                        "apiBase": "https://example.com/v1",
+                        "thinkingStyle": "thinking_type",
+                    },
+                },
+            }
+        )
+        after = before.model_copy(deep=True)
+        after.providers.model_extra["tenant"].thinking_style = "enable_thinking"
+
+        assert provider_signature(before) != provider_signature(after)