docs: 更新协议文档，删除废弃计划文档

- 更新 http-error-codes, user-points-chat-data-protocol
- 更新 divination-run-protocol, profile-protocol
- 删除废弃的后端和前端设计计划文档

backend/src/schemas/agent/runtime_models.py

@@ -5,7 +5,6 @@ from typing import Any, Literal
 
 from pydantic import BaseModel, ConfigDict, Field
 
-from schemas.agent.ui_hints import UiHintsPayload
 from schemas.domain.divination import DerivedDivinationData
 
 
@@ -53,18 +52,28 @@ class WorkerAgentOutputLite(BaseModel):
     error: ErrorInfo | None = None
 
 
-class WorkerAgentOutputRich(WorkerAgentOutputLite):
-    ui_hints: UiHintsPayload | None = None
+class FollowUpOutput(BaseModel):
+    model_config = ConfigDict(extra="forbid")
+
+    status: RunStatus = RunStatus.SUCCESS
+    answer: str = Field(min_length=1, max_length=4000)
+    error: ErrorInfo | None = None
 
 
-class AgentOutput(WorkerAgentOutputRich):
+class AgentOutput(WorkerAgentOutputLite):
     model_config = ConfigDict(extra="forbid")
 
     divination_derived: DerivedDivinationData | None = None
 
 
-WorkerAgentOutput = WorkerAgentOutputLite | WorkerAgentOutputRich
+WorkerAgentOutput = WorkerAgentOutputLite
+RuntimeAgentOutput = AgentOutput | FollowUpOutput
 
 
-def resolve_worker_output_model() -> type[WorkerAgentOutputLite]:
+def resolve_worker_output_model(
+    *, runtime_mode: str
+) -> type[WorkerAgentOutputLite | FollowUpOutput]:
+    normalized = runtime_mode.strip().lower()
+    if normalized == "follow_up":
+        return FollowUpOutput
     return WorkerAgentOutputLite