feat(profile-helper): decouple profile-helper from agent-links

- Revert profile_helper/agent.py to 7322752: remove system_prompt param
  that was added solely to serve agent-links needs.
- Revert profile_helper/sessions.py to 7322752: remove list_ids() that
  was added solely to serve agent-links needs.
- Add internal session registry (_active_session_ids, register_session,
  get_active_ids) in agent_links_runtime so agent-links owns its own
  active-session tracking, independent of profile_helper internals.
- Replace all profile_sessions.list_ids() calls in agent_links API with
  agent_links_runtime.get_active_ids().

Made-with: Cursor

Author: FZR95

app/api/agent_links.py

@@ -254,7 +254,7 @@ def start_link_session(slug: str, req: StartLinkSessionRequest):
         sid,
         session,
         link,
-        active_session_ids=set(profile_sessions.list_ids()),
+        active_session_ids=agent_links_runtime.get_active_ids(),
     )
     welcome = link.get("welcome_message") or ""
     return StartLinkSessionResponse(
@@ -278,7 +278,7 @@ async def chat_via_agent_link(slug: str, req: LinkChatRequest):
         session_id,
         session,
         link,
-        active_session_ids=set(profile_sessions.list_ids()),
+        active_session_ids=agent_links_runtime.get_active_ids(),
     )
 
     model = req.model or link.get("default_model") or None
@@ -331,7 +331,7 @@ async def upload_workspace_file(
         sid,
         session,
         link,
-        active_session_ids=set(profile_sessions.list_ids()),
+        active_session_ids=agent_links_runtime.get_active_ids(),
     )
     filename = (file.filename or "").strip()
     if not filename:

app/services/agent_links_runtime.py

@@ -12,6 +12,19 @@
 from app.models.schemas import DEFAULT_ALLOWED_TOOLS
 from app.services.profile_helper.prompts import META_SYSTEM_PROMPT
 
+# Internal registry of active agent-link session IDs — independent from profile_helper.
+_active_session_ids: set[str] = set()
+
+
+def register_session(session_id: str) -> None:
+    """Mark a session as active so its workspace is not cleaned up."""
+    _active_session_ids.add(session_id)
+
+
+def get_active_ids() -> set[str]:
+    """Return the set of currently registered active session IDs."""
+    return set(_active_session_ids)
+
 
 def _session_root() -> Path:
     root = get_workspace_base() / "agent_links_sessions"
@@ -37,6 +50,7 @@ def ensure_session_workspace(
     active_session_ids: set[str] | None = None,
 ) -> str:
     """Ensure per-session workspace exists and return its absolute path."""
+    register_session(session_id)
     if active_session_ids is not None:
         _cleanup_orphans(active_session_ids)
 

app/services/profile_helper/agent.py

@@ -118,29 +118,26 @@ def run_agent(
     *,
     stream: bool = False,
     model: str | None = None,
-    system_prompt: str | None = None,
 ):
     """
     Run agent loop. session is from sessions.get().
     If stream=True, yield each chunk; else yield full reply.
     model: optional override for this request; defaults to AI_GENERATION_MODEL.
-    system_prompt: optional override for system prompt.
     """
     client = create_client()
     if not client:
         yield "错误：未配置 AI 生成 API。请在 .env 中设置 AI_GENERATION_BASE_URL 和 AI_GENERATION_API_KEY。"
         return
 
     model = model or get_default_model()
-    prompt_text = system_prompt or META_SYSTEM_PROMPT
     messages = session["messages"].copy()
     messages.append({"role": "user", "content": user_message})
 
     max_iterations = 20
     for _ in range(max_iterations):
         response = client.chat.completions.create(
             model=model,
-            messages=[{"role": "system", "content": prompt_text}] + messages,
+            messages=[{"role": "system", "content": META_SYSTEM_PROMPT}] + messages,
             tools=_build_tools(),
             tool_choice="auto",
         )

app/services/profile_helper/sessions.py

@@ -82,9 +82,3 @@ def reset(session_id: str) -> dict:
     """Reset session: clear messages and restore template profile."""
     _sessions[session_id] = _new_session()
     return _sessions[session_id]
-
-
-def list_ids() -> list[str]:
-    """List current active session IDs after best-effort cleanup."""
-    _cleanup()
-    return list(_sessions.keys())