refactor: remove legacy assistant compatibility

backend/tests/test_vision_prompt_modes.py

@@ -5,7 +5,7 @@ from types import SimpleNamespace
 
 from models import AssistantConfig
 from services.brains.base import RealtimeBrainRuntime
-from services.node_specs import normalize_graph, validate_graph
+from services.node_specs import validate_graph
 from services.vision import (
     VISION_SYSTEM_HINT,
     resolve_vision_question,
@@ -16,6 +16,35 @@ from services.workflow_engine import WorkflowEngine
 from services.workflow.realtime import WorkflowRealtimeController
 
 
+def workflow_settings(**overrides):
+    settings = {
+        "runtimeMode": "pipeline",
+        "llmRoutingMode": "llm_router",
+        "globalPrompt": "",
+        "defaultRealtimeResourceId": "",
+        "defaultLlmResourceId": "",
+        "defaultAsrResourceId": "",
+        "defaultTtsResourceId": "",
+        "visionEnabled": False,
+        "visionModelResourceId": "",
+        "visionPromptMode": "runtime",
+        "visionPrompt": "",
+        "toolBindings": [],
+        "builtInTools": {},
+        "knowledgeBaseId": "",
+        "knowledgeMode": "disabled",
+        "knowledgeTopN": 5,
+        "knowledgeScoreThreshold": 0.0,
+        "enableInterrupt": True,
+        "turnConfig": {
+            "bargeIn": {"strategy": "vad"},
+            "turnDetection": {"strategy": "smart_turn"},
+        },
+    }
+    settings.update(overrides)
+    return settings
+
+
 class VisionPromptModeTest(unittest.TestCase):
     def test_fixed_mode_has_no_runtime_question_parameter(self):
         description, properties, required = vision_tool_schema_parts(
@@ -80,12 +109,14 @@ class VisionPromptModeTest(unittest.TestCase):
 class WorkflowVisionPromptModeTest(unittest.TestCase):
     def test_workflow_resolves_global_and_node_modes(self):
         graph = {
-            "specVersion": 3,
-            "settings": {
-                "visionEnabled": True,
-                "visionPromptMode": "fixed",
-                "visionPrompt": "全局固定问题",
-            },
+            "specVersion": 4,
+            "settings": workflow_settings(
+                **{
+                    "visionEnabled": True,
+                    "visionPromptMode": "fixed",
+                    "visionPrompt": "全局固定问题",
+                }
+            ),
             "nodes": [
                 {
                     "id": "global-agent",
@@ -116,36 +147,37 @@ class WorkflowVisionPromptModeTest(unittest.TestCase):
         self.assertEqual(custom_stage.vision_prompt_mode, "guided")
         self.assertEqual(custom_stage.vision_prompt, "节点引导")
 
-    def test_legacy_focus_is_migrated_to_guided_mode(self):
-        normalized = normalize_graph(
-            {
-                "specVersion": 3,
-                "settings": {"visionFocusPrompt": "旧全局关注目标"},
-                "nodes": [],
-                "edges": [],
-            }
-        )
-
-        self.assertEqual(normalized["settings"]["visionPromptMode"], "guided")
-        self.assertEqual(normalized["settings"]["visionPrompt"], "旧全局关注目标")
-        self.assertNotIn("visionFocusPrompt", normalized["settings"])
-
     def test_fixed_or_guided_mode_requires_prompt_when_vision_is_enabled(self):
         graph = {
-            "specVersion": 3,
-            "settings": {
-                "visionEnabled": True,
-                "visionPromptMode": "fixed",
-                "visionPrompt": "",
-            },
+            "specVersion": 4,
+            "settings": workflow_settings(
+                **{
+                    "visionEnabled": True,
+                    "visionPromptMode": "fixed",
+                    "visionPrompt": "",
+                }
+            ),
             "nodes": [
+                {"id": "start", "type": "start", "data": {}},
                 {
                     "id": "agent",
                     "type": "agent",
-                    "data": {"name": "Agent", "prompt": "处理任务"},
+                    "data": {
+                        "name": "Agent",
+                        "prompt": "处理任务",
+                        "inheritGlobalConfig": True,
+                        "entryMode": "wait_user",
+                    },
+                }
+            ],
+            "edges": [
+                {
+                    "id": "begin",
+                    "source": "start",
+                    "target": "agent",
+                    "data": {"mode": "always", "priority": 0},
                 }
             ],
-            "edges": [],
         }
 
         self.assertTrue(
@@ -154,16 +186,29 @@ class WorkflowVisionPromptModeTest(unittest.TestCase):
 
     def test_invalid_mode_is_reported_instead_of_silently_rewritten(self):
         graph = {
-            "specVersion": 3,
-            "settings": {"visionPromptMode": "unexpected"},
+            "specVersion": 4,
+            "settings": workflow_settings(visionPromptMode="unexpected"),
             "nodes": [
+                {"id": "start", "type": "start", "data": {}},
                 {
                     "id": "agent",
                     "type": "agent",
-                    "data": {"name": "Agent", "prompt": "处理任务"},
+                    "data": {
+                        "name": "Agent",
+                        "prompt": "处理任务",
+                        "inheritGlobalConfig": True,
+                        "entryMode": "wait_user",
+                    },
+                }
+            ],
+            "edges": [
+                {
+                    "id": "begin",
+                    "source": "start",
+                    "target": "agent",
+                    "data": {"mode": "always", "priority": 0},
                 }
             ],
-            "edges": [],
         }
 
         self.assertTrue(
@@ -172,8 +217,8 @@ class WorkflowVisionPromptModeTest(unittest.TestCase):
 
     def test_realtime_tool_contract_changes_with_mode(self):
         graph = {
-            "specVersion": 3,
-            "settings": {},
+            "specVersion": 4,
+            "settings": workflow_settings(),
             "nodes": [
                 {
                     "id": "fixed-agent",