refactor(backend): 修复 agent router 中 HTTPException 与 problem_payload 混用问题

backend/src/v1/agent/router.py

@@ -9,7 +9,7 @@ from datetime import date
 from typing import Annotated
 
 from ag_ui.core import RunAgentInput
-from core.http.errors import problem_payload
+from core.http.errors import ApiProblemError, problem_payload
 from core.agentscope.events import to_sse_event
 from core.agentscope.schemas.agui_input import (
     parse_run_input,
@@ -132,14 +132,14 @@ async def enqueue_run(
     try:
         request = parse_run_input(request.model_dump(by_alias=True, exclude_none=True))
     except ValueError as exc:
-        raise HTTPException(
+        raise ApiProblemError(
             status_code=422,
             detail=problem_payload(code="AGENT_RUN_INPUT_INVALID", detail=str(exc)),
         ) from exc
     try:
         validate_run_request_messages_contract(request)
     except ValueError as exc:
-        raise HTTPException(
+        raise ApiProblemError(
             status_code=422,
             detail=problem_payload(code="AGENT_RUN_MESSAGES_INVALID", detail=str(exc)),
         ) from exc
@@ -197,20 +197,14 @@ async def stream_events(
     ):
         raise HTTPException(
             status_code=422,
-            detail=problem_payload(
-                code="AGENT_INVALID_LAST_EVENT_ID",
-                detail="Invalid Last-Event-ID",
-            ),
+            detail="Invalid Last-Event-ID",
         )
 
     sse_slot_acquired = await _acquire_sse_slot(user_id=str(current_user.id))
     if not sse_slot_acquired:
         raise HTTPException(
             status_code=429,
-            detail=problem_payload(
-                code="AGENT_SSE_CONNECTION_LIMIT",
-                detail="Too many SSE connections",
-            ),
+            detail="Too many SSE connections",
         )
 
     async def _event_iter() -> AsyncIterator[str]:
@@ -304,19 +298,12 @@ async def upload_attachment(
     if not payload:
         raise HTTPException(
             status_code=422,
-            detail=problem_payload(
-                code="AGENT_ATTACHMENT_EMPTY",
-                detail="Empty attachment",
-            ),
+            detail="Empty attachment",
         )
     if len(payload) > _MAX_ATTACHMENT_UPLOAD_BYTES:
         raise HTTPException(
             status_code=413,
-            detail=problem_payload(
-                code="AGENT_ATTACHMENT_TOO_LARGE",
-                detail="Attachment too large",
-                params={"maxBytes": _MAX_ATTACHMENT_UPLOAD_BYTES},
-            ),
+            detail="Attachment too large",
         )
     attachment = await service.upload_attachment(
         thread_id=thread_id,
@@ -362,7 +349,7 @@ async def transcribe(
     temp_path: str | None = None
     try:
         if audio.content_type not in _ALLOWED_AUDIO_CONTENT_TYPES:
-            raise HTTPException(
+            raise ApiProblemError(
                 status_code=400,
                 detail=problem_payload(
                     code="AGENT_AUDIO_UNSUPPORTED_FORMAT",
@@ -381,7 +368,7 @@ async def transcribe(
                 and declared_length
                 > _MAX_TRANSCRIBE_AUDIO_BYTES + _MULTIPART_OVERHEAD_BYTES
             ):
-                raise HTTPException(
+                raise ApiProblemError(
                     status_code=400,
                     detail=problem_payload(
                         code="AGENT_AUDIO_TOO_LARGE",
@@ -403,11 +390,7 @@ async def transcribe(
                 if total_bytes > _MAX_TRANSCRIBE_AUDIO_BYTES:
                     raise HTTPException(
                         status_code=400,
-                        detail=problem_payload(
-                            code="AGENT_AUDIO_TOO_LARGE",
-                            detail="Audio file too large",
-                            params={"maxBytes": _MAX_TRANSCRIBE_AUDIO_BYTES},
-                        ),
+                        detail="Audio file too large",
                     )
                 if len(header) < _WAV_HEADER_MIN_BYTES:
                     required = _WAV_HEADER_MIN_BYTES - len(header)
@@ -417,18 +400,12 @@ async def transcribe(
         if total_bytes == 0:
             raise HTTPException(
                 status_code=400,
-                detail=problem_payload(
-                    code="AGENT_AUDIO_EMPTY",
-                    detail="Empty audio file",
-                ),
+                detail="Empty audio file",
             )
         if not _looks_like_wav_header(bytes(header)):
             raise HTTPException(
                 status_code=400,
-                detail=problem_payload(
-                    code="AGENT_AUDIO_UNSUPPORTED_FORMAT",
-                    detail="Unsupported audio format",
-                ),
+                detail="Unsupported audio format",
             )
 
         transcript = await asr_service.transcribe_file(
@@ -440,7 +417,7 @@ async def transcribe(
     except HTTPException:
         raise
     except RuntimeError:
-        raise HTTPException(
+        raise ApiProblemError(
             status_code=502,
             detail=problem_payload(
                 code="AGENT_ASR_UNAVAILABLE",