feat: FAM-Edge chat proxy + PyMySQL migration for FAM-UI + config update

- FAM-Edge: add /api/edge/chat proxy endpoint forwarding to local Ollama
  (Ollama port 11434 not exposed externally, FAM-Edge acts as reverse proxy)
- FAM-Core config: edge_url and ollama_url switched from Tailscale IP to
  Oracle public IP (Tailscale firewall blocking between NAS and Oracle)
- FAM-UI: migrate mysql.connector to PyMySQL (same as FAM-Core)
- FAM-UI: cursor(dictionary=True) replaced with cursorclass=DictCursor
- End-to-end chat verified: FAM-Core -> FAM-Edge proxy -> Ollama -> response
  Answer: 今天没有观察到张三 (no events in DB yet, expected)

fam-ui/src/app.py

@@ -8,7 +8,8 @@ import os
 import sys
 import requests
 import streamlit as st
-import mysql.connector
+import pymysql
+import pymysql.cursors
 import pandas as pd
 import json
 from datetime import datetime, date
@@ -26,13 +27,14 @@ _db_cfg = _cfg.get('database', {})
 
 def get_db_conn():
     """获取数据库连接"""
-    return mysql.connector.connect(
+    return pymysql.connect(
         host=_db_cfg.get('host', '127.0.0.1'),
         port=_db_cfg.get('port', 3306),
         user=_db_cfg.get('user', 'root'),
         password=_db_cfg.get('password', ''),
         database=_db_cfg.get('database', 'sentinel_home_ai'),
-        charset='utf8mb4'
+        charset='utf8mb4',
+        cursorclass=pymysql.cursors.DictCursor
     )
 
 
@@ -83,7 +85,7 @@ if page == "📊 事件列表":
 
     conn = get_db_conn()
     try:
-        cursor = conn.cursor(dictionary=True)
+        cursor = conn.cursor()
 
         # 查询条件
         date_str = date_filter.isoformat() if date_filter else None
@@ -185,7 +187,7 @@ elif page == "💬 AI 对话":
     # 快捷人物按钮
     conn = get_db_conn()
     try:
-        cursor = conn.cursor(dictionary=True)
+        cursor = conn.cursor()
         cursor.execute("SELECT DISTINCT real_name FROM family_members WHERE real_name IS NOT NULL AND is_active = TRUE")
         named = [row['real_name'] for row in cursor.fetchall()]
     finally:
@@ -256,7 +258,7 @@ elif page == "📝 对话历史":
 
     conn = get_db_conn()
     try:
-        cursor = conn.cursor(dictionary=True)
+        cursor = conn.cursor()
         cursor.execute(
             """SELECT chat_id, user_question, ai_answer, context_summary,
                       queried_date, queried_person, created_at
@@ -311,7 +313,7 @@ elif page == "👤 成员命名":
     st.subheader("未命名人物")
     conn = get_db_conn()
     try:
-        cursor = conn.cursor(dictionary=True)
+        cursor = conn.cursor()
         cursor.execute(
             """SELECT fm.abstract_label, fm.feature_description, fm.first_seen_at,
                       (SELECT COUNT(*) FROM event_details ed WHERE ed.person = fm.abstract_label) AS event_count
@@ -399,7 +401,7 @@ elif page == "📈 统计图表":
 
     conn = get_db_conn()
     try:
-        cursor = conn.cursor(dictionary=True)
+        cursor = conn.cursor()
 
         # compute_provider 分布
         st.subheader("模型来源分布")