feat(topics): Enhance topic model with moderator mode attributes and integration

- Added `moderator_mode_id` and `moderator_mode_name` fields to the Topic model for better moderator mode handling.
- Implemented `_augment_topic_with_moderator_mode` function to populate moderator mode details from workspace configuration.
- Updated `get_topics` and `get_topic_detail` endpoints to utilize the new function, ensuring topics are enriched with moderator mode information before returning.

Author: FZR95

app/api/topics.py

@@ -2,6 +2,7 @@
 
 from fastapi import APIRouter, HTTPException
 
+from app.agent.moderator_modes import PRESET_MODES, load_moderator_mode_config
 from app.agent.workspace import ensure_topic_workspace, read_discussion_history
 from app.core.config import get_workspace_base
 from app.models.schemas import (
@@ -22,9 +23,30 @@
 router = APIRouter()
 
 
+def _augment_topic_with_moderator_mode(topic: Topic) -> Topic:
+    """Add moderator_mode_id and moderator_mode_name from workspace config."""
+    try:
+        ws_base = get_workspace_base()
+        ws_path = ws_base / "topics" / topic.id
+        cfg = load_moderator_mode_config(ws_path)
+        mode_id = cfg.get("mode_id", "standard")
+        topic.moderator_mode_id = mode_id
+        if mode_id == "custom":
+            topic.moderator_mode_name = "自定义模式"
+        else:
+            topic.moderator_mode_name = PRESET_MODES.get(mode_id, {}).get("name", mode_id)
+    except Exception:
+        topic.moderator_mode_id = "standard"
+        topic.moderator_mode_name = PRESET_MODES.get("standard", {}).get("name", "Standard Round Table")
+    return topic
+
+
 @router.get("", response_model=list[Topic])
 def get_topics():
-    return list_topics()
+    topics = list_topics()
+    for t in topics:
+        _augment_topic_with_moderator_mode(t)
+    return topics
 
 
 @router.post("", response_model=Topic, status_code=201)
@@ -39,6 +61,8 @@ def post_topic(data: TopicCreate):
 @router.get("/{topic_id}", response_model=Topic)
 def get_topic_detail(topic_id: str):
     topic = get_topic(topic_id)
+    if topic:
+        _augment_topic_with_moderator_mode(topic)
     if not topic:
         raise HTTPException(status_code=404, detail="Topic not found")
 

app/models/schemas.py

@@ -71,6 +71,9 @@ class Topic(BaseModel):
     discussion_status: DiscussionStatus = DiscussionStatus.PENDING
     created_at: str
     updated_at: str
+    # Populated by API from config/moderator_mode.json (not in topic.json)
+    moderator_mode_id: Optional[str] = None
+    moderator_mode_name: Optional[str] = None
 
 
 # --- Comment models ---