更新

backend/database/migrate_add_support_context.php

@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * 迁移脚本：为 ai_models 表添加 support_context 字段（已存在则跳过）
+ * 用法: php database/migrate_add_support_context.php
+ */
+
+$host = '127.0.0.1';
+$user = 'root';
+$pass = 'root';
+$port = 3306;
+$dbName = 'ai_chat';
+
+try {
+    $pdo = new PDO("mysql:host={$host};port={$port};dbname={$dbName};charset=utf8mb4", $user, $pass, [
+        PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
+    ]);
+
+    $exists = $pdo->query("SHOW COLUMNS FROM ai_models LIKE 'support_context'")->fetch();
+
+    if ($exists) {
+        echo "support_context 字段已存在，跳过。\n";
+    } else {
+        $pdo->exec("ALTER TABLE ai_models ADD COLUMN support_context TINYINT(1) DEFAULT 1 COMMENT '是否支持上下文（多轮对话）' AFTER enabled");
+        echo "已添加 support_context 字段。\n";
+    }
+} catch (PDOException $e) {
+    echo "Error: " . $e->getMessage() . "\n";
+    exit(1);
+}