feat(mcp): mcp 独立应用与 /mcp Streamable HTTP 端点（官方 SDK + PSR-7 桥接）

extend/base/mcp/service/Psr16ThinkCacheBase.php

@@ -0,0 +1,114 @@
+<?php
+
+declare(strict_types=1);
+
+namespace base\mcp\service;
+
+use Psr\SimpleCache\CacheInterface;
+use think\cache\Driver;
+use think\facade\Cache;
+
+/**
+ * think Cache 驱动的 PSR-16 薄适配器.
+ *
+ * mcp/sdk 的 Psr16SessionStore 需要 Psr\SimpleCache\CacheInterface 实现，
+ * think cache Driver 方法集与 PSR-16 同形（get/set/delete/clear/has/*Multiple），
+ * 本类只做签名收紧与 TTL 归一（int|DateInterval|null → 秒），全部转发给
+ * defaultStore() 指定的 think 缓存 store。
+ *
+ * 子类（app 壳）覆写 defaultStore() 返回 'mcp_session' 等具体 store 名。
+ */
+class Psr16ThinkCacheBase implements CacheInterface
+{
+    protected Driver $driver;
+
+    public function __construct(?Driver $driver = null)
+    {
+        $this->driver = $driver ?? Cache::store($this->defaultStore());
+    }
+
+    /**
+     * 默认 think 缓存 store 名（子类覆写）.
+     */
+    protected function defaultStore(): string
+    {
+        return 'file';
+    }
+
+    public function get(string $key, mixed $default = null): mixed
+    {
+        return $this->driver->get($key, $default);
+    }
+
+    public function set(string $key, mixed $value, null|int|\DateInterval $ttl = null): bool
+    {
+        return (bool) $this->driver->set($key, $value, $this->normalizeTtl($ttl));
+    }
+
+    public function delete(string $key): bool
+    {
+        return (bool) $this->driver->delete($key);
+    }
+
+    public function clear(): bool
+    {
+        return (bool) $this->driver->clear();
+    }
+
+    public function getMultiple(iterable $keys, mixed $default = null): iterable
+    {
+        $keys = is_array($keys) ? $keys : iterator_to_array($keys, false);
+
+        $result = [];
+        foreach ($keys as $key) {
+            $result[$key] = $this->driver->get($key, $default);
+        }
+
+        return $result;
+    }
+
+    public function setMultiple(iterable $values, null|int|\DateInterval $ttl = null): bool
+    {
+        $ttl = $this->normalizeTtl($ttl);
+
+        $result = true;
+        foreach ($values as $key => $value) {
+            if (!$this->driver->set((string) $key, $value, $ttl)) {
+                $result = false;
+            }
+        }
+
+        return $result;
+    }
+
+    public function deleteMultiple(iterable $keys): bool
+    {
+        $result = true;
+        foreach ($keys as $key) {
+            if (!$this->driver->delete($key)) {
+                $result = false;
+            }
+        }
+
+        return $result;
+    }
+
+    public function has(string $key): bool
+    {
+        return (bool) $this->driver->has($key);
+    }
+
+    /**
+     * PSR-16 TTL 归一为秒：DateInterval 折算秒数；null 视为 0（think 驱动默认有效期，0=永久）.
+     */
+    protected function normalizeTtl(null|int|\DateInterval $ttl): int
+    {
+        if ($ttl instanceof \DateInterval) {
+            $now = new \DateTimeImmutable('@' . time());
+
+            return max(0, $now->add($ttl)->getTimestamp() - $now->getTimestamp());
+        }
+
+        return max(0, (int) ($ttl ?? 0));
+    }
+}