diff --git a/database.py b/database.py
index 6755f6d..73bd4cd 100644
--- a/database.py
+++ b/database.py
@@ -219,24 +219,43 @@ class ReviewDatabase:
 
                 CREATE TABLE IF NOT EXISTS screener_strategies (
                     id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    user_id INTEGER,
                     name TEXT NOT NULL,
                     description TEXT NOT NULL DEFAULT '',
                     regimes TEXT NOT NULL,
                     formula TEXT NOT NULL,
                     builtin INTEGER NOT NULL DEFAULT 0,
                     created_at TEXT NOT NULL,
-                    updated_at TEXT NOT NULL
+                    updated_at TEXT NOT NULL,
+                    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
                 );
 
                 CREATE TABLE IF NOT EXISTS screener_runs (
                     id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    user_id INTEGER,
                     trade_date TEXT NOT NULL,
                     regime TEXT NOT NULL,
                     strategy_name TEXT NOT NULL,
                     formula TEXT NOT NULL,
                     result TEXT NOT NULL,
-                    created_at TEXT NOT NULL
+                    created_at TEXT NOT NULL,
+                    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
                 );
+
+                CREATE TABLE IF NOT EXISTS mentor_messages (
+                    id INTEGER PRIMARY KEY AUTOINCREMENT,
+                    user_id INTEGER NOT NULL,
+                    mentor_id TEXT NOT NULL,
+                    trade_date TEXT NOT NULL,
+                    role TEXT NOT NULL,
+                    content TEXT NOT NULL,
+                    meta TEXT NOT NULL DEFAULT '',
+                    created_at TEXT NOT NULL,
+                    FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+                );
+
+                CREATE INDEX IF NOT EXISTS idx_mentor_messages_conversation
+                ON mentor_messages(user_id, mentor_id, trade_date, id DESC);
                 """
             )
             user_columns = {
@@ -309,6 +328,38 @@ class ReviewDatabase:
                 ON review_notes(user_id, trade_date DESC, id DESC)
                 """
             )
+            strategy_columns = {
+                str(row["name"]) for row in connection.execute("PRAGMA table_info(screener_strategies)")
+            }
+            if "user_id" not in strategy_columns:
+                connection.execute("ALTER TABLE screener_strategies ADD COLUMN user_id INTEGER")
+            run_columns = {
+                str(row["name"]) for row in connection.execute("PRAGMA table_info(screener_runs)")
+            }
+            if "user_id" not in run_columns:
+                connection.execute("ALTER TABLE screener_runs ADD COLUMN user_id INTEGER")
+            if first_user and first_user["id"]:
+                first_user_id = int(first_user["id"])
+                connection.execute(
+                    "UPDATE screener_strategies SET user_id = ? WHERE builtin = 0 AND user_id IS NULL",
+                    (first_user_id,),
+                )
+                connection.execute(
+                    "UPDATE screener_runs SET user_id = ? WHERE user_id IS NULL",
+                    (first_user_id,),
+                )
+            connection.execute(
+                """
+                CREATE INDEX IF NOT EXISTS idx_screener_strategies_user
+                ON screener_strategies(user_id, builtin, updated_at DESC)
+                """
+            )
+            connection.execute(
+                """
+                CREATE INDEX IF NOT EXISTS idx_screener_runs_user_date
+                ON screener_runs(user_id, trade_date DESC, id DESC)
+                """
+            )
 
     def count_users(self) -> int:
         with self.connect() as connection:
@@ -658,6 +709,33 @@ class ReviewDatabase:
         except json.JSONDecodeError:
             return None
 
+    def get_latest_data_snapshot(
+        self,
+        kind: str,
+        cache_key_prefix: str,
+        maximum_cache_key: str,
+        exclude_source: str = "",
+    ) -> dict[str, Any] | None:
+        source_clause = " AND source != ?" if exclude_source else ""
+        parameters: list[Any] = [kind, f"{cache_key_prefix}%", maximum_cache_key]
+        if exclude_source:
+            parameters.append(exclude_source)
+        with self.connect() as connection:
+            row = connection.execute(
+                f"""
+                SELECT payload FROM data_snapshots
+                WHERE kind = ? AND cache_key LIKE ? AND cache_key <= ?{source_clause}
+                ORDER BY cache_key DESC LIMIT 1
+                """,
+                parameters,
+            ).fetchone()
+        if not row:
+            return None
+        try:
+            return json.loads(row["payload"])
+        except json.JSONDecodeError:
+            return None
+
     def save_data_snapshot(
         self, kind: str, cache_key: str, source: str, payload: dict[str, Any]
     ) -> None:
@@ -1073,7 +1151,7 @@ class ReviewDatabase:
         return result
 
     def save_screener_strategy(
-        self, name: str, description: str, regimes: list[str], formula: dict[str, Any],
+        self, user_id: int | None, name: str, description: str, regimes: list[str], formula: dict[str, Any],
         builtin: bool = False, strategy_id: int | None = None,
     ) -> int:
         now = datetime.now().astimezone().isoformat(timespec="seconds")
@@ -1081,31 +1159,50 @@ class ReviewDatabase:
         formula_json = json.dumps(formula, ensure_ascii=False, separators=(",", ":"))
         with self.connect() as connection:
             if strategy_id:
-                cursor = connection.execute(
-                    """
-                    UPDATE screener_strategies SET name=?, description=?, regimes=?, formula=?,
-                        builtin=?, updated_at=? WHERE id=?
-                    """,
-                    (name, description, regimes_json, formula_json, int(builtin), now, strategy_id),
-                )
+                if builtin:
+                    cursor = connection.execute(
+                        """
+                        UPDATE screener_strategies SET name=?, description=?, regimes=?, formula=?,
+                            builtin=1, user_id=NULL, updated_at=? WHERE id=? AND builtin=1
+                        """,
+                        (name, description, regimes_json, formula_json, now, strategy_id),
+                    )
+                else:
+                    cursor = connection.execute(
+                        """
+                        UPDATE screener_strategies SET name=?, description=?, regimes=?, formula=?,
+                            updated_at=? WHERE id=? AND builtin=0 AND user_id=?
+                        """,
+                        (name, description, regimes_json, formula_json, now, strategy_id, int(user_id or 0)),
+                    )
                 if cursor.rowcount == 0:
                     raise ValueError("选股策略不存在。")
                 return strategy_id
             cursor = connection.execute(
                 """
                 INSERT INTO screener_strategies
-                    (name, description, regimes, formula, builtin, created_at, updated_at)
-                VALUES (?, ?, ?, ?, ?, ?, ?)
+                    (user_id, name, description, regimes, formula, builtin, created_at, updated_at)
+                VALUES (?, ?, ?, ?, ?, ?, ?, ?)
                 """,
-                (name, description, regimes_json, formula_json, int(builtin), now, now),
+                (None if builtin else int(user_id or 0), name, description, regimes_json, formula_json, int(builtin), now, now),
             )
             return int(cursor.lastrowid)
 
-    def list_screener_strategies(self) -> list[dict[str, Any]]:
+    def list_screener_strategies(self, user_id: int | None = None) -> list[dict[str, Any]]:
         with self.connect() as connection:
-            rows = connection.execute(
-                "SELECT * FROM screener_strategies ORDER BY builtin DESC, updated_at DESC, id"
-            ).fetchall()
+            if user_id is None:
+                rows = connection.execute(
+                    "SELECT * FROM screener_strategies WHERE builtin = 1 ORDER BY updated_at DESC, id"
+                ).fetchall()
+            else:
+                rows = connection.execute(
+                    """
+                    SELECT * FROM screener_strategies
+                    WHERE builtin = 1 OR user_id = ?
+                    ORDER BY builtin DESC, updated_at DESC, id
+                    """,
+                    (int(user_id),),
+                ).fetchall()
         result = []
         for row in rows:
             item = dict(row)
@@ -1115,24 +1212,26 @@ class ReviewDatabase:
             result.append(item)
         return result
 
-    def delete_screener_strategy(self, strategy_id: int) -> bool:
+    def delete_screener_strategy(self, user_id: int, strategy_id: int) -> bool:
         with self.connect() as connection:
             row = connection.execute(
-                "SELECT builtin FROM screener_strategies WHERE id = ?",
+                "SELECT builtin, user_id FROM screener_strategies WHERE id = ?",
                 (strategy_id,),
             ).fetchone()
             if not row:
                 raise ValueError("选股策略不存在。")
             if bool(row["builtin"]):
                 raise ValueError("内置策略不能删除。")
+            if int(row["user_id"] or 0) != int(user_id):
+                raise ValueError("无权删除其他账号的策略。")
             cursor = connection.execute(
-                "DELETE FROM screener_strategies WHERE id = ? AND builtin = 0",
-                (strategy_id,),
+                "DELETE FROM screener_strategies WHERE id = ? AND builtin = 0 AND user_id = ?",
+                (strategy_id, int(user_id)),
             )
             return cursor.rowcount > 0
 
     def save_screener_run(
-        self, trade_date: str, regime: str, strategy_name: str,
+        self, user_id: int, trade_date: str, regime: str, strategy_name: str,
         formula: dict[str, Any], result: dict[str, Any],
     ) -> int:
         now = datetime.now().astimezone().isoformat(timespec="seconds")
@@ -1140,23 +1239,23 @@ class ReviewDatabase:
             cursor = connection.execute(
                 """
                 INSERT INTO screener_runs
-                    (trade_date, regime, strategy_name, formula, result, created_at)
-                VALUES (?, ?, ?, ?, ?, ?)
+                    (user_id, trade_date, regime, strategy_name, formula, result, created_at)
+                VALUES (?, ?, ?, ?, ?, ?, ?)
                 """,
-                (trade_date, regime, strategy_name,
+                (int(user_id), trade_date, regime, strategy_name,
                  json.dumps(formula, ensure_ascii=False, separators=(",", ":")),
                  json.dumps(result, ensure_ascii=False, separators=(",", ":")), now),
             )
             return int(cursor.lastrowid)
 
-    def latest_screener_run(self, trade_date: str) -> dict[str, Any] | None:
+    def latest_screener_run(self, user_id: int, trade_date: str) -> dict[str, Any] | None:
         with self.connect() as connection:
             row = connection.execute(
                 """
                 SELECT id, trade_date, regime, strategy_name, result, created_at
-                FROM screener_runs WHERE trade_date <= ? ORDER BY id DESC LIMIT 1
+                FROM screener_runs WHERE user_id = ? AND trade_date <= ? ORDER BY id DESC LIMIT 1
                 """,
-                (trade_date,),
+                (int(user_id), trade_date),
             ).fetchone()
         if not row:
             return None
@@ -1168,6 +1267,60 @@ class ReviewDatabase:
         result["meta"]["created_at"] = row["created_at"]
         return result
 
+    def save_mentor_exchange(
+        self,
+        user_id: int,
+        mentor_id: str,
+        trade_date: str,
+        question: str,
+        answer: str,
+        meta: str = "",
+    ) -> None:
+        now = datetime.now().astimezone().isoformat(timespec="seconds")
+        with self.connect() as connection:
+            connection.executemany(
+                """
+                INSERT INTO mentor_messages
+                    (user_id, mentor_id, trade_date, role, content, meta, created_at)
+                VALUES (?, ?, ?, ?, ?, ?, ?)
+                """,
+                [
+                    (int(user_id), mentor_id, trade_date, "user", question, "", now),
+                    (int(user_id), mentor_id, trade_date, "assistant", answer, meta, now),
+                ],
+            )
+            connection.execute(
+                """
+                DELETE FROM mentor_messages
+                WHERE user_id = ? AND id NOT IN (
+                    SELECT id FROM mentor_messages WHERE user_id = ? ORDER BY id DESC LIMIT 500
+                )
+                """,
+                (int(user_id), int(user_id)),
+            )
+
+    def list_mentor_messages(
+        self, user_id: int, mentor_id: str, trade_date: str, limit: int = 100
+    ) -> list[dict[str, Any]]:
+        with self.connect() as connection:
+            rows = connection.execute(
+                """
+                SELECT role, content, meta, created_at FROM mentor_messages
+                WHERE user_id = ? AND mentor_id = ? AND trade_date = ?
+                ORDER BY id DESC LIMIT ?
+                """,
+                (int(user_id), mentor_id, trade_date, max(1, min(500, int(limit)))),
+            ).fetchall()
+        return [dict(row) for row in reversed(rows)]
+
+    def delete_mentor_messages(self, user_id: int, mentor_id: str, trade_date: str) -> int:
+        with self.connect() as connection:
+            cursor = connection.execute(
+                "DELETE FROM mentor_messages WHERE user_id = ? AND mentor_id = ? AND trade_date = ?",
+                (int(user_id), mentor_id, trade_date),
+            )
+            return int(cursor.rowcount)
+
     def start_sync(self, trade_date: str, source: str) -> int:
         started_at = datetime.now().astimezone().isoformat(timespec="seconds")
         with self.connect() as connection:
diff --git a/screener.py b/screener.py
index e730f56..6d58b31 100644
--- a/screener.py
+++ b/screener.py
@@ -259,7 +259,7 @@ class ScreenerEngine:
         existing = {item["name"] for item in self.database.list_screener_strategies() if item["builtin"]}
         for strategy in BUILTIN_STRATEGIES:
             if strategy["name"] not in existing:
-                self.database.save_screener_strategy(**strategy, builtin=True)
+                self.database.save_screener_strategy(None, **strategy, builtin=True)
 
     def detect_regime(self, trade_date: str) -> dict[str, Any]:
         series = latest_contiguous_history(
@@ -336,7 +336,7 @@ class ScreenerEngine:
         return result
 
     def screen(
-        self, trade_date: str, formula: dict[str, Any], regime: str,
+        self, user_id: int, trade_date: str, formula: dict[str, Any], regime: str,
         strategy_name: str, run_backtest: bool = True,
         realtime_snapshot: dict[str, Any] | None = None,
     ) -> dict[str, Any]:
@@ -384,7 +384,7 @@ class ScreenerEngine:
             "disclaimer": "概率为历史条件估计，不代表未来收益；退潮或样本不足时允许无候选。",
         }
         run_id = self.database.save_screener_run(
-            actual_date, regime, strategy_name, formula, result
+            user_id, actual_date, regime, strategy_name, formula, result
         )
         result["meta"]["run_id"] = run_id
         return result
diff --git a/server.py b/server.py
index 593f789..a530b0e 100644
--- a/server.py
+++ b/server.py
@@ -18,7 +18,6 @@ from typing import Any
 from urllib.parse import parse_qs, unquote, urlparse
 
 from database import ReviewDatabase
-from demo_data import build_demo_dragon_tiger, build_demo_stock_detail
 from heaven_agent import HeavenAgentError, interpret_heaven
 from heaven_engine import (
     _market_line_scores,
@@ -1074,7 +1073,7 @@ class DashboardService:
         llm_access = self.llm_access_status()
         return {
             "configured": self.configured,
-            "mode": "tushare" if self.configured else "demo",
+            "mode": "tushare" if self.configured else "unavailable",
             "llm_configured": self.llm_configured,
             "llm_model": self.llm_primary_model if self.llm_configured else "",
             "llm_fallback_configured": self.llm_fallback_configured,
@@ -1097,7 +1096,7 @@ class DashboardService:
             "trade_date": normalized_date,
             "regime": regime,
             "regimes": [{"id": key, "label": value} for key, value in REGIMES.items()],
-            "strategies": self.database.list_screener_strategies(),
+            "strategies": self.database.list_screener_strategies(self.current_user_id),
             "factor_fields": [{"id": key, "label": value} for key, value in FACTOR_FIELDS.items()],
             "factor_data": {
                 "date_count": len(factor_dates),
@@ -1111,7 +1110,7 @@ class DashboardService:
                 "fallback_configured": self.llm_fallback_configured,
                 "fallback_model": self.llm_fallback_model if self.llm_fallback_configured else "",
             },
-            "latest_result": self.database.latest_screener_run(normalized_date),
+            "latest_result": self.database.latest_screener_run(self.current_user_id, normalized_date),
         }
 
     def sync_screener_data(self, trade_date: str, lookback: int = 45) -> dict[str, Any]:
@@ -1191,14 +1190,19 @@ class DashboardService:
         if not isinstance(regimes, list) or not regimes or any(item not in REGIMES for item in regimes):
             raise ValueError("策略适用阶段不正确。")
         formula = self.screener.validate_formula(payload.get("formula") or {})
-        strategy_id = self.database.save_screener_strategy(name, description, regimes, formula)
-        return {"id": strategy_id, "strategies": self.database.list_screener_strategies()}
+        strategy_id = self.database.save_screener_strategy(
+            self.current_user_id, name, description, regimes, formula
+        )
+        return {
+            "id": strategy_id,
+            "strategies": self.database.list_screener_strategies(self.current_user_id),
+        }
 
     def delete_screener_strategy(self, strategy_id: int) -> dict[str, Any]:
-        deleted = self.database.delete_screener_strategy(strategy_id)
+        deleted = self.database.delete_screener_strategy(self.current_user_id, strategy_id)
         return {
             "deleted": deleted,
-            "strategies": self.database.list_screener_strategies(),
+            "strategies": self.database.list_screener_strategies(self.current_user_id),
         }
 
     def mentor_setup(self, trade_date: str) -> dict[str, Any]:
@@ -1275,6 +1279,14 @@ class DashboardService:
             "success",
             int(result.get("latency_ms") or 0),
         )
+        self.database.save_mentor_exchange(
+            self.current_user_id,
+            mentor_id,
+            trade_date,
+            question,
+            str(result.get("answer") or ""),
+            context["data_trade_date"],
+        )
         return {
             **result,
             "mentor": skill.public(),
@@ -1284,6 +1296,21 @@ class DashboardService:
             "notice": "主模型调用失败，已自动切换辅助模型。" if compiler == "fallback" else "",
         }
 
+    def mentor_messages(self, mentor_id: str, trade_date: str) -> list[dict[str, Any]]:
+        mentor_id = validate_text(mentor_id, "问师角色", 100, required=True)
+        trade_date = normalize_date(trade_date)
+        self.mentor_skills.get_skill(mentor_id)
+        return self.database.list_mentor_messages(
+            self.current_user_id, mentor_id, trade_date
+        )
+
+    def clear_mentor_messages(self, mentor_id: str, trade_date: str) -> int:
+        mentor_id = validate_text(mentor_id, "问师角色", 100, required=True)
+        trade_date = normalize_date(trade_date)
+        return self.database.delete_mentor_messages(
+            self.current_user_id, mentor_id, trade_date
+        )
+
     @staticmethod
     def _heaven_manual_schema(market_mode: str) -> dict[str, dict[str, Any]]:
         intraday = market_mode == "intraday"
@@ -2585,7 +2612,7 @@ class DashboardService:
             except TushareError as exc:
                 raise ValueError(f"实时选股行情不可用，已停止筛选：{exc}") from exc
         return self.screener.screen(
-            trade_date, formula, regime, strategy_name,
+            self.current_user_id, trade_date, formula, regime, strategy_name,
             bool(payload.get("run_backtest", True)),
             realtime_snapshot,
         )
@@ -2636,17 +2663,29 @@ class DashboardService:
                 self.database.save_data_snapshot(cache_kind, normalized_date, "tushare", payload)
             return payload
 
-        demo = self._apply_seat_aliases(build_demo_dragon_tiger(normalized_date))
-        demo["meta"] = {
-            **demo.get("meta", {}),
+        return {
+            "meta": {
             "requested_date": f"{normalized_date[:4]}-{normalized_date[4:6]}-{normalized_date[6:8]}",
-            "source": "demo",
-            "status": "demo",
+            "trade_date": f"{normalized_date[:4]}-{normalized_date[4:6]}-{normalized_date[6:8]}",
+            "source": "unavailable",
+            "status": "unavailable",
             "schema_version": 3,
             "cached": False,
-            "notice": "尚未配置 Tushare Token，当前展示演示数据。",
+            "notice": "公共行情尚未配置，暂无龙虎榜数据。",
+            },
+            "summary": {
+                "trader_count": 0,
+                "identity_count": 0,
+                "operation_count": 0,
+                "active_stock_count": 0,
+                "seat_net_buy_million": 0,
+                "unclassified_count": 0,
+                "directory_count": 0,
+            },
+            "traders": [],
+            "unclassified_seats": [],
+            "rows": [],
         }
-        return demo
 
     def _search_market_directory(self) -> list[dict[str, Any]]:
         cached = self.database.get_data_snapshot("search_directory", "ths") or {}
@@ -2935,12 +2974,12 @@ class DashboardService:
         cache_key = f"{code}:{normalized_date}"
         if not force:
             cached = self.database.get_data_snapshot("stock_detail", cache_key)
-            if cached:
+            if cached and str((cached.get("meta") or {}).get("source") or "") != "demo":
                 cached["meta"] = {**cached.get("meta", {}), "cached": True}
                 return self._enrich_stock_detail(cached)
 
         name, sector = self._stock_identity(code, normalized_date)
-        source = "tushare" if self.configured else "demo"
+        source = "tushare"
         if self.configured:
             try:
                 payload = TushareClient(self.token).stock_detail(
@@ -2949,16 +2988,31 @@ class DashboardService:
                 if not payload.get("prices"):
                     raise TushareError("No price history returned")
             except TushareError as exc:
-                source = "demo"
-                payload = build_demo_stock_detail(
-                    code,
-                    normalized_date,
-                    name,
-                    sector,
-                    f"个股行情接口暂不可用，已回退演示数据。原因：{exc}",
+                payload = self.database.get_latest_data_snapshot(
+                    "stock_detail", f"{code}:", cache_key, exclude_source="demo"
                 )
+                if not payload:
+                    raise ValueError(f"暂无 {code} 的真实行情数据：{exc}") from exc
+                payload = copy.deepcopy(payload)
+                payload["meta"] = {
+                    **payload.get("meta", {}),
+                    "cached": True,
+                    "notice": "最新行情暂不可用，已沿用最近真实收盘数据。",
+                }
+                return self._enrich_stock_detail(payload)
         else:
-            payload = build_demo_stock_detail(code, normalized_date, name, sector)
+            payload = self.database.get_latest_data_snapshot(
+                "stock_detail", f"{code}:", cache_key, exclude_source="demo"
+            )
+            if not payload:
+                raise ValueError(f"暂无 {code} 的真实行情数据，请等待后台完成首次同步。")
+            payload = copy.deepcopy(payload)
+            payload["meta"] = {
+                **payload.get("meta", {}),
+                "cached": True,
+                "notice": "公共行情尚未配置，已沿用最近真实收盘数据。",
+            }
+            return self._enrich_stock_detail(payload)
         payload["meta"]["source"] = source
         payload["meta"]["cached"] = False
         self.database.save_data_snapshot("stock_detail", cache_key, source, payload)
@@ -3043,7 +3097,7 @@ class DashboardService:
         return {
             "meta": {
                 "trade_date": resolved_date,
-                "source": detail_meta.get("source") or "demo",
+                "source": detail_meta.get("source") or "unavailable",
                 "notice": detail_meta.get("notice") or "",
                 "intraday_status": intraday_status,
                 "intraday_notice": intraday_notice,
@@ -3317,7 +3371,10 @@ class RequestHandler(BaseHTTPRequestHandler):
             return
         if parsed.path.startswith("/api/admin/") and not self.require_admin():
             return
-        if parsed.path in {"/api/screener/setup", "/api/mentors/setup", "/api/heaven/setup"} and not self.require_member():
+        if parsed.path in {
+            "/api/screener/setup", "/api/mentors/setup", "/api/mentors/messages",
+            "/api/heaven/setup",
+        } and not self.require_member():
             return
         if parsed.path == "/api/admin/settings":
             self.send_json(
@@ -3462,6 +3519,20 @@ class RequestHandler(BaseHTTPRequestHandler):
             except ValueError as exc:
                 self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)
             return
+        if parsed.path == "/api/mentors/messages":
+            query = parse_qs(parsed.query)
+            try:
+                self.send_json(
+                    {
+                        "items": SERVICE.mentor_messages(
+                            query.get("mentor_id", [""])[0],
+                            query.get("trade_date", [date.today().isoformat()])[0],
+                        )
+                    }
+                )
+            except ValueError as exc:
+                self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)
+            return
         if parsed.path == "/api/heaven/setup":
             query = parse_qs(parsed.query)
             trade_date = query.get("trade_date", [date.today().isoformat()])[0]
@@ -3537,12 +3608,18 @@ class RequestHandler(BaseHTTPRequestHandler):
             self.save_note()
             return
         if parsed.path == "/api/reasons":
+            if not self.require_admin():
+                return
             self.save_reason()
             return
         if parsed.path == "/api/seat-aliases":
+            if not self.require_admin():
+                return
             self.save_seat_alias()
             return
         if parsed.path == "/api/heaven/sector-phases":
+            if not self.require_admin():
+                return
             self.save_sector_phase_override()
             return
         if parsed.path == "/api/backfill":
@@ -3582,6 +3659,19 @@ class RequestHandler(BaseHTTPRequestHandler):
             deleted = SERVICE.database.delete_user_birth_profile(SERVICE.current_user_id)
             self.send_json({"ok": True, "deleted": deleted})
             return
+        if parsed.path == "/api/mentors/messages":
+            if not self.require_member():
+                return
+            query = parse_qs(parsed.query)
+            try:
+                deleted = SERVICE.clear_mentor_messages(
+                    query.get("mentor_id", [""])[0],
+                    query.get("trade_date", [date.today().isoformat()])[0],
+                )
+                self.send_json({"ok": True, "deleted": deleted})
+            except ValueError as exc:
+                self.send_json({"error": str(exc)}, HTTPStatus.BAD_REQUEST)
+            return
         strategy_match = re.fullmatch(r"/api/screener/strategies/(\d+)", parsed.path)
         if strategy_match:
             if not self.require_member():
@@ -3608,7 +3698,7 @@ class RequestHandler(BaseHTTPRequestHandler):
             return
         sector_phase_match = re.fullmatch(r"/api/heaven/sector-phases/(.+)", parsed.path)
         if sector_phase_match:
-            if not self.require_member():
+            if not self.require_admin():
                 return
             name = unquote(sector_phase_match.group(1)).strip()
             deleted = SERVICE.database.delete_sector_phase_override(name)
diff --git a/static/app.js b/static/app.js
index 5b92082..5d358b1 100644
--- a/static/app.js
+++ b/static/app.js
@@ -286,6 +286,8 @@ async function applyAuthenticatedSession(session) {
   updateAccountIdentityBadges(session.user?.membership || {});
   document.querySelector("#settingsButton").hidden = !isAdmin;
   document.querySelector("#syncButton").hidden = !isAdmin;
+  document.querySelector("#reasonForm").hidden = !isAdmin;
+  document.querySelector("#sectorPhaseManager").hidden = !isAdmin;
   const factorSyncButton = document.querySelector("#factorSyncButton");
   if (factorSyncButton) factorSyncButton.hidden = false;
   document.querySelector("#authGate").hidden = true;
@@ -1309,8 +1311,9 @@ function renderDragonTraderDetail(trader) {
 
 function renderUnclassifiedSeats() {
   const seats = state.dragonTiger?.unclassified_seats || [];
-  document.querySelector("#dragonUnclassifiedSection").hidden = seats.length === 0;
-  document.querySelector("#dragonUnclassifiedFilter").hidden = seats.length === 0;
+  const canManage = state.user?.role === "admin";
+  document.querySelector("#dragonUnclassifiedSection").hidden = !canManage || seats.length === 0;
+  document.querySelector("#dragonUnclassifiedFilter").hidden = !canManage || seats.length === 0;
   if (!seats.length && state.dragonFilter === "unclassified") {
     state.dragonFilter = "all";
     document.querySelectorAll("[data-dragon-filter]").forEach((button) => {
@@ -1826,7 +1829,7 @@ async function loadMentorSetup(force = false) {
     state.mentorSetup = payload;
     const selectedExists = payload.mentors.some((item) => item.id === state.selectedMentorId);
     state.selectedMentorId = selectedExists ? state.selectedMentorId : payload.mentors[0]?.id || "";
-    state.mentorMessages = loadStoredMentorMessages();
+    state.mentorMessages = await loadMentorMessages();
     renderMentorWorkspace();
   } catch (error) {
     showMentorNotice(error.message || "问师模块加载失败");
@@ -1854,13 +1857,14 @@ function renderMentorWorkspace() {
   renderMentorMessages();
 }
 
-function selectMentor(mentorId) {
+async function selectMentor(mentorId) {
   if (mentorId === state.selectedMentorId) return;
-  saveStoredMentorMessages();
   state.selectedMentorId = mentorId;
-  state.mentorMessages = loadStoredMentorMessages();
+  state.mentorMessages = [];
   hideMentorNotice();
   renderMentorWorkspace();
+  state.mentorMessages = await loadMentorMessages();
+  renderMentorMessages();
 }
 
 function renderMentorMessages() {
@@ -1925,7 +1929,6 @@ async function sendMentorQuestion(event) {
       content: payload.answer,
       meta: `${displayCompactDate(payload.data_trade_date)} · ${modelRole} ${payload.model} · ${number(payload.latency_ms)}ms`,
     });
-    saveStoredMentorMessages();
     if (payload.notice) showMentorNotice(payload.notice);
     setStatus("问师回答完成");
   } catch (error) {
@@ -1945,33 +1948,37 @@ function useMentorQuickPrompt(prompt) {
   input.focus();
 }
 
-function clearMentorConversation() {
+async function clearMentorConversation() {
   if (!state.mentorMessages.length || !window.confirm("确定清空当前老师的对话记录吗？")) return;
-  state.mentorMessages = [];
-  try { localStorage.removeItem(mentorStorageKey()); } catch {}
-  hideMentorNotice();
-  renderMentorMessages();
-}
-
-function mentorStorageKey() {
-  const dateKey = (state.mentorSetup?.trade_date || elements.tradeDate.value).replaceAll("-", "");
-  return `xiaobai-mentor-chat:${state.selectedMentorId}:${dateKey}`;
-}
-
-function loadStoredMentorMessages() {
-  if (!state.selectedMentorId) return [];
   try {
-    const messages = JSON.parse(localStorage.getItem(mentorStorageKey()) || "[]");
-    if (!Array.isArray(messages)) return [];
-    return messages.filter((item) => ["user", "assistant"].includes(item?.role) && typeof item.content === "string").slice(-20);
-  } catch {
-    return [];
+    const query = new URLSearchParams({
+      mentor_id: state.selectedMentorId,
+      trade_date: state.mentorSetup?.trade_date || elements.tradeDate.value,
+    });
+    await apiRequest(`/api/mentors/messages?${query}`, "DELETE");
+    state.mentorMessages = [];
+    hideMentorNotice();
+    renderMentorMessages();
+  } catch (error) {
+    showToast(error.message || "对话记录清空失败");
   }
 }
 
-function saveStoredMentorMessages() {
-  if (!state.selectedMentorId) return;
-  try { localStorage.setItem(mentorStorageKey(), JSON.stringify(state.mentorMessages.slice(-20))); } catch {}
+async function loadMentorMessages() {
+  if (!state.selectedMentorId) return [];
+  try {
+    const query = new URLSearchParams({
+      mentor_id: state.selectedMentorId,
+      trade_date: state.mentorSetup?.trade_date || elements.tradeDate.value,
+    });
+    const payload = await apiRequest(`/api/mentors/messages?${query}`);
+    return (payload.items || []).filter(
+      (item) => ["user", "assistant"].includes(item?.role) && typeof item.content === "string",
+    ).slice(-100);
+  } catch (error) {
+    showMentorNotice(error.message || "对话记录加载失败");
+    return [];
+  }
 }
 
 function showMentorNotice(message) {
@@ -2744,11 +2751,12 @@ function drawQiUseConnections(animate = false) {
 
 function renderSectorPhaseOverrides(items) {
   const container = document.querySelector("#sectorPhaseOverrides");
+  const canManage = state.user?.role === "admin";
   container.innerHTML = items.length ? items.map((item) => `
     <div class="sector-phase-override-row">
       <span class="phase-symbol phase-${phaseClass(item.element)}">${escapeHtml(item.element)}</span>
       <strong>${escapeHtml(item.name)}</strong>
-      <button class="icon-button" type="button" data-sector-phase-delete="${escapeHtml(item.name)}" title="删除手动归类" aria-label="删除 ${escapeHtml(item.name)} 的手动归类">×</button>
+      ${canManage ? `<button class="icon-button" type="button" data-sector-phase-delete="${escapeHtml(item.name)}" title="删除手动归类" aria-label="删除 ${escapeHtml(item.name)} 的手动归类">×</button>` : ""}
     </div>
   `).join("") : '<p class="sector-phase-empty">暂无手动归类</p>';
   container.querySelectorAll("[data-sector-phase-delete]").forEach((button) => {
diff --git a/static/index.html b/static/index.html
index 0e4012e..1b1dd29 100644
--- a/static/index.html
+++ b/static/index.html
@@ -544,7 +544,7 @@
               <div class="workspace-heading"><h3>历法细目</h3><span>中运、司天、在泉与节气定位</span></div>
               <div id="fortuneMetrics" class="fortune-metrics"></div>
             </section>
-            <details class="sector-phase-manager">
+            <details id="sectorPhaseManager" class="sector-phase-manager">
               <summary class="sector-phase-manager-heading"><strong>管理手动归类</strong><span>精确名称优先</span><i data-lucide="chevron-down" aria-hidden="true"></i></summary>
               <div class="sector-phase-manager-body">
               <form id="sectorPhaseForm" class="sector-phase-form">
@@ -1036,7 +1036,7 @@
       <h3>事件逻辑</h3>
       <p id="detailReason">--</p>
       <span id="detailSector" class="sector-chip">--</span>
-      <form id="reasonForm" class="inline-edit-form">
+      <form id="reasonForm" class="inline-edit-form" hidden>
         <input id="reasonInput" type="text" maxlength="200" placeholder="修订事件逻辑">
         <button class="button" type="submit">保存修订</button>
       </form>
diff --git a/tests/test_account_data_boundaries.py b/tests/test_account_data_boundaries.py
new file mode 100644
index 0000000..85a08d5
--- /dev/null
+++ b/tests/test_account_data_boundaries.py
@@ -0,0 +1,193 @@
+from __future__ import annotations
+
+import sqlite3
+import tempfile
+import unittest
+from pathlib import Path
+from types import SimpleNamespace
+
+from database import ReviewDatabase
+from server import DashboardService, RequestHandler
+
+
+FORMULA = {"all": [{"field": "change", "operator": ">", "value": 0}]}
+
+
+class AccountDataBoundaryTests(unittest.TestCase):
+    def setUp(self) -> None:
+        self.temp = tempfile.TemporaryDirectory()
+        self.database = ReviewDatabase(Path(self.temp.name) / "review.db")
+        self.first = self.database.create_user("first_user", "salt", "hash")
+        self.second = self.database.create_user("second_user", "salt", "hash")
+
+    def tearDown(self) -> None:
+        self.temp.cleanup()
+
+    def test_custom_strategies_are_private_and_builtins_are_shared(self):
+        builtin_id = self.database.save_screener_strategy(
+            None, "共享策略", "", ["repair"], FORMULA, builtin=True
+        )
+        private_id = self.database.save_screener_strategy(
+            self.first["id"], "甲的策略", "", ["repair"], FORMULA
+        )
+
+        first_names = {item["name"] for item in self.database.list_screener_strategies(self.first["id"])}
+        second_names = {item["name"] for item in self.database.list_screener_strategies(self.second["id"])}
+        self.assertEqual(first_names, {"共享策略", "甲的策略"})
+        self.assertEqual(second_names, {"共享策略"})
+        with self.assertRaises(ValueError):
+            self.database.delete_screener_strategy(self.second["id"], private_id)
+        with self.assertRaises(ValueError):
+            self.database.delete_screener_strategy(self.first["id"], builtin_id)
+        self.assertTrue(self.database.delete_screener_strategy(self.first["id"], private_id))
+
+    def test_screener_runs_are_private(self):
+        self.database.save_screener_run(
+            self.first["id"], "20260721", "repair", "甲的策略", FORMULA,
+            {"candidates": [{"code": "002141"}], "meta": {}},
+        )
+        self.assertEqual(
+            self.database.latest_screener_run(self.first["id"], "20260722")["candidates"][0]["code"],
+            "002141",
+        )
+        self.assertIsNone(self.database.latest_screener_run(self.second["id"], "20260722"))
+
+    def test_mentor_messages_are_scoped_by_user_mentor_and_date(self):
+        self.database.save_mentor_exchange(
+            self.first["id"], "mentor-a", "20260721", "怎么看？", "先看承接。", "20260721"
+        )
+        self.assertEqual(
+            [item["role"] for item in self.database.list_mentor_messages(
+                self.first["id"], "mentor-a", "20260721"
+            )],
+            ["user", "assistant"],
+        )
+        self.assertEqual(
+            self.database.list_mentor_messages(self.second["id"], "mentor-a", "20260721"), []
+        )
+        self.assertEqual(
+            self.database.list_mentor_messages(self.first["id"], "mentor-b", "20260721"), []
+        )
+        self.assertEqual(
+            self.database.list_mentor_messages(self.first["id"], "mentor-a", "20260722"), []
+        )
+        self.assertEqual(
+            self.database.delete_mentor_messages(self.second["id"], "mentor-a", "20260721"), 0
+        )
+        self.assertEqual(
+            self.database.delete_mentor_messages(self.first["id"], "mentor-a", "20260721"), 2
+        )
+
+    def test_latest_data_snapshot_skips_demo_and_future_records(self):
+        self.database.save_data_snapshot(
+            "stock_detail", "002141:20260718", "tushare", {"marker": "real"}
+        )
+        self.database.save_data_snapshot(
+            "stock_detail", "002141:20260719", "demo", {"marker": "demo"}
+        )
+        self.database.save_data_snapshot(
+            "stock_detail", "002141:20260723", "tushare", {"marker": "future"}
+        )
+        payload = self.database.get_latest_data_snapshot(
+            "stock_detail", "002141:", "002141:20260722", exclude_source="demo"
+        )
+        self.assertEqual(payload["marker"], "real")
+
+    def test_stock_detail_never_falls_back_to_demo_data(self):
+        self.database.save_data_snapshot(
+            "stock_detail",
+            "002141:20260721",
+            "demo",
+            {"meta": {"source": "demo"}, "stock": {"code": "002141"}, "prices": [{}]},
+        )
+        service = DashboardService.__new__(DashboardService)
+        service.database = self.database
+        service._system_credentials = {"tushare_token": ""}
+        service._request_context = SimpleNamespace(user_id=self.first["id"])
+
+        with self.assertRaisesRegex(ValueError, "暂无 002141 的真实行情数据"):
+            service.get_stock_detail("002141", "2026-07-22")
+
+
+class LegacyStrategyMigrationTests(unittest.TestCase):
+    def test_legacy_custom_strategy_and_run_move_to_first_admin(self):
+        with tempfile.TemporaryDirectory() as directory:
+            database_path = Path(directory) / "legacy.db"
+            connection = sqlite3.connect(database_path)
+            try:
+                connection.executescript(
+                    """
+                    CREATE TABLE users (
+                        id INTEGER PRIMARY KEY AUTOINCREMENT,
+                        username TEXT NOT NULL UNIQUE,
+                        password_salt TEXT NOT NULL,
+                        password_hash TEXT NOT NULL,
+                        created_at TEXT NOT NULL,
+                        updated_at TEXT NOT NULL
+                    );
+                    INSERT INTO users VALUES (1, 'legacy_admin', 'salt', 'hash', '2026-01-01', '2026-01-01');
+                    CREATE TABLE screener_strategies (
+                        id INTEGER PRIMARY KEY AUTOINCREMENT,
+                        name TEXT NOT NULL,
+                        description TEXT NOT NULL DEFAULT '',
+                        regimes TEXT NOT NULL,
+                        formula TEXT NOT NULL,
+                        builtin INTEGER NOT NULL DEFAULT 0,
+                        created_at TEXT NOT NULL,
+                        updated_at TEXT NOT NULL
+                    );
+                    INSERT INTO screener_strategies VALUES
+                        (1, '旧策略', '', '["repair"]', '{"all":[]}', 0, '2026-01-01', '2026-01-01'),
+                        (2, '旧内置', '', '["repair"]', '{"all":[]}', 1, '2026-01-01', '2026-01-01');
+                    CREATE TABLE screener_runs (
+                        id INTEGER PRIMARY KEY AUTOINCREMENT,
+                        trade_date TEXT NOT NULL,
+                        regime TEXT NOT NULL,
+                        strategy_name TEXT NOT NULL,
+                        formula TEXT NOT NULL,
+                        result TEXT NOT NULL,
+                        created_at TEXT NOT NULL
+                    );
+                    INSERT INTO screener_runs VALUES
+                        (1, '20260721', 'repair', '旧策略', '{}', '{"meta":{}}', '2026-07-21');
+                    """
+                )
+                connection.commit()
+            finally:
+                connection.close()
+
+            migrated = ReviewDatabase(database_path)
+            strategies = migrated.list_screener_strategies(1)
+            owners = {item["name"]: item["user_id"] for item in strategies}
+            self.assertEqual(owners["旧策略"], 1)
+            self.assertIsNone(owners["旧内置"])
+            self.assertIsNotNone(migrated.latest_screener_run(1, "20260722"))
+
+
+class PublicKnowledgePermissionTests(unittest.TestCase):
+    @staticmethod
+    def handler(path: str, method_name: str):
+        handler = RequestHandler.__new__(RequestHandler)
+        handler.path = path
+        handler.require_auth = lambda: True
+        handler.require_csrf = lambda: True
+        handler.require_admin = lambda: False
+        handler.require_member = lambda: True
+        setattr(handler, method_name, lambda: (_ for _ in ()).throw(AssertionError("mutation ran")))
+        return handler
+
+    def test_regular_user_cannot_change_reason_or_seat_alias(self):
+        RequestHandler.do_POST(self.handler("/api/reasons", "save_reason"))
+        RequestHandler.do_POST(self.handler("/api/seat-aliases", "save_seat_alias"))
+
+    def test_regular_user_cannot_change_sector_phase(self):
+        RequestHandler.do_POST(
+            self.handler("/api/heaven/sector-phases", "save_sector_phase_override")
+        )
+        RequestHandler.do_DELETE(
+            self.handler("/api/heaven/sector-phases/%E6%B2%B9%E6%B0%94", "send_json")
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()
diff --git a/tests/test_frontend_contract.py b/tests/test_frontend_contract.py
index 9925340..36612f1 100644
--- a/tests/test_frontend_contract.py
+++ b/tests/test_frontend_contract.py
@@ -44,6 +44,11 @@ class FrontendContractTests(unittest.TestCase):
         self.assertEqual(views, navigation)
         self.assertEqual(len(views), 13)
 
+    def test_public_knowledge_editors_are_hidden_for_non_admins(self):
+        self.assertIn('document.querySelector("#reasonForm").hidden = !isAdmin;', self.script)
+        self.assertIn('document.querySelector("#sectorPhaseManager").hidden = !isAdmin;', self.script)
+        self.assertIn('const canManage = state.user?.role === "admin";', self.script)
+
 
 if __name__ == "__main__":
     unittest.main()