feat(xxm): dynamic TUI session context injection for coregroup

- chat_bridge: mark_active_tui_session() + get_active_tui_session()
  Tracks active TUI session via temp/.active_tui_session.json,
  auto-expires after 1 hour (matching Hermes state_meta pattern)
- chat_bridge: inject TUI context when processing coregroup messages
  Bot now sees what hmo was discussing in TUI when replying in group
- session_router: record active session ID on every TUI message
  Uses _resolve_session() to get the current bound session ID

gateway/scripts/chat_bridge.py

@@ -17,6 +17,41 @@ os.environ["NO_PROXY"] = "*"
 import requests
 _TZ = timezone(timedelta(hours=8))
 
+# ── Dynamic TUI session tracking ──
+# When xxm is chatting with hmo in TUI, record the active session ID.
+# When the bot processes a coregroup message, it injects TUI context
+# so the LLM knows what hmo and xxm were discussing in the TUI.
+# Auto-expires after 1 hour (matching Hermes' state_meta pattern).
+_ACTIVE_SESSION_FILE = os.path.join(
+    os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
+    "temp", ".active_tui_session.json")
+
+
+def mark_active_tui_session(session_id: str):
+    """Record the active TUI session ID + timestamp."""
+    try:
+        d = os.path.dirname(_ACTIVE_SESSION_FILE)
+        if d: os.makedirs(d, exist_ok=True)
+        with open(_ACTIVE_SESSION_FILE, "w") as f:
+            json.dump({"session_id": session_id, "timestamp": int(time.time())}, f)
+    except Exception:
+        pass
+
+
+def get_active_tui_session(max_age: int = 3600) -> str | None:
+    """Return active TUI session ID if recent enough (< 1 hour)."""
+    try:
+        if not os.path.exists(_ACTIVE_SESSION_FILE):
+            return None
+        with open(_ACTIVE_SESSION_FILE, "r") as f:
+            data = json.load(f)
+        age = time.time() - data.get("timestamp", 0)
+        if age < max_age:
+            return data.get("session_id")
+    except Exception:
+        pass
+    return None
+
 # ── Logging ──
 _LOG_FILE = os.path.join(
     os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
@@ -650,6 +685,23 @@ class SessionBridge:
         if recent_ctx:
             sys_prompt += f"\n\n最近对话：\n{recent_ctx}"
 
+        # Dynamic session switching: inject TUI context for coregroup messages
+        if "[群聊" in message:
+            tui_sid = get_active_tui_session()
+            if tui_sid:
+                try:
+                    from session_router import extract_session_context
+                    tui_ctx = extract_session_context(tui_sid, limit=50)
+                    if tui_ctx:
+                        sys_prompt += (
+                            "\n\n【你的 TUI 工作台最近对话】"
+                            f"\n（老莫在 TUI 和你讨论这些时，转发了群聊消息，"
+                            f"请结合下面的 TUI 对话理解他在群里的意图。"
+                            f"群聊和 TUI 是同一个人，两份上下文关联看）\n{tui_ctx}"
+                        )
+                except Exception:
+                    pass
+
         # Build messages array
         messages = [
             {"role": "system", "content": sys_prompt},

gateway/scripts/session_router.py

@@ -620,5 +620,16 @@ class SessionRouter:
         tagged = f"{prefix}{message}"
         history = [{"role": "user", "content": tagged}]
 
+        # Dynamic context switching: record active TUI session
+        # so bot can inject TUI context when replying to coregroup
+        if channel != "xmpp":
+            try:
+                sid = self._resolve_session(key, allow_create=False)
+                if sid:
+                    from chat_bridge import mark_active_tui_session
+                    mark_active_tui_session(sid)
+            except Exception:
+                pass
+
         # 4. Run LLM command loop
         return self._llm_loop(key, history)